213 Sentences With "unnavigable" | Random Sentence Generator

The world's most unnavigable rivers also await their first descents.

The result is cities that are all but unnavigable to anybody without wheels.

Last year, low water levels on the Rhine made parts of it unnavigable.

Your inbox can seem like an unnavigable behemoth on the best of days.

What makes a situation terrifying and unnavigable to one person is nothing to another.

They figured that an unfamiliar, unnavigable and politically correct landscape was now fast approaching.

Depending on your perspective, Instagram is a trippy digital maze or an unnavigable sprawl.

Tucked into a hilltop, Pignola is pure Italian charm: crumbing stone buildings and narrow, unnavigable streets.

Front End Engineer — $105,240 Without front end engineers, the rabbithole of the internet would be unnavigable.

Many parks often have unpaved paths, inaccessible curbs or unnavigable topographical features such steep hills and unlevel woods.

The maps themselves, presented by BD-1's hologram emitter, also start to feel unnavigable in the post-game.

"In its infinite wisdom, the Democratic Party has rendered the presidential primary unnavigable," quipped Darry Sragow, a longtime California strategist.

It feels like the world as you know it, dissolving and re-forming into an unimaginable and unnavigable new configuration.

At the heart of the problem is a broken federal permitting process that has created an unnavigable gantlet for hydropower projects.

Unlike similar remote desktop apps, Parallels Access offers optimized screen resolution for your mobile device, so your desktop never appears distorted and unnavigable.

Prior to Carlson's seventh of the season, much of the offensive attempts were perimeter shots as the middle of the ice was unnavigable.

It looks daunting at first, even unnavigable, but after paddling uncertainly for a while your raft will find a current and rush you forward, pell mell.

Years of political football and misaligned incentives have taken ideas initially meant to serve the American taxpayer and warped them into unnavigable mazes of kickbacks and bureaucracy.

Thanks to climate change, a giant cruise ship is charging through the once-unnavigable Northwest Passage, bringing an unprecedented number of tourists to remote Arctic communities for the first time.

This can turn supposedly open spaces into deeply hostile or unnavigable ones — not just for public figures like Trump or Ocasio-Cortez, but for anybody who wants to engage with them.

Environmentalists say man-made diversions, including agriculture and hydroelectric dams, have helped alter water levels to a degree that long stretches of the river are now unnavigable during the dry season.

And in Tennessee, the requirement to repay fines and fees before being allowed to vote has reportedly placed some in an unnavigable maze of bureaucracy with no clear way to regain their rights.

With Rhine water levels in 2018 reduced to just 30cm in some parts, this made it unnavigable for larger cargo barges prompting many producers to resort to using other means of transport or smaller barges.

The Zouave soldier on one of the piers of the Alma bridge - a statue that is Parisians' best-known measure for the height of the Seine - saw the water reaching to his calves, just below the 4.30 meter mark that makes the river unnavigable.

What these correctives routinely fail to do is consider that the rest of us — media, voters, all of us who perpetuate norms around gender and power in a million subtle ways — have created an unnavigable landscape for female "firsts" generally, and for this one especially.

The Zouave soldier on one of the piers of the Alma bridge - a statue that is Parisians' best-known measure for the height of the Seine - saw the water reaching to his calves, just below the 4.30 meter mark that makes the river unnavigable.

Fans couldn't help but turn away from the actual game unfolding before them, and instead fixate on his quest to leap from a fence in the outfield to the wall behind it, a seemingly unnavigable gulf that, try as he might, our hero just couldn't cross—for a time.

Forget the misleading suggestions of progress: the gimmicky Chanel shows on Havana's Paseo del Prado; the filming of the pyrotechnics for the film "Fast 8" on the city's scorching streets (badly paved and practically unnavigable several days before); the Rolling Stones concert; or surprise visits by Usher, Katy Perry, Rihanna, the Kardashian clan.

But all those disappointments made for an excellent case study on the way we shop today: the collapse between the luxury marketplace and street wear-inspired drops, the ways in which the perfect-information promise of internet commerce is a sham, how the hype cycle has become a series of unnavigable spikes and also a long arc all at once.

Roads have become unmotorable, traffic unnavigable, and the state government, unresponsive.

Waters may be unnavigable because of ice, particularly in winter. Navigability depends on context: a small river may be navigable by smaller craft, such as a motorboat or a kayak, but unnavigable by a cruise ship. Shallow rivers may be made navigable by the installation of locks that increase and regulate water depth, or by dredging.

Below Kongolo, the river becomes unnavigable as it enters the narrow gorge of Portes d'Enfer (Gates of Hell). Between Kasongo and Kibombo, the river is navigable for about , before rapids make it unnavigable again between Kibombo and Kindu (Port-Empain). From Kindu up to the Boyoma Falls at Ubundu, the stream is navigable again for more than 300 kilometres. The Boyoma Falls or Stanley Falls are made up of seven cataracts, over a stretch of of the river, between Ubundu and Kisangani.

Firefly is held at the end of Vermont's mud and rain season. The road leading to the current event site is a dirt road that can become unnavigable by average vehicles due to mud.

His column advanced along the Nile, using the river for resupply and communication, while laying track around the unnavigable sections.Churchill 2014 [1902] p. 180. However, the expedition could not proceed in this fashion all the way to Omdurman.

After falling revenues due to competition from the railways, the navigation company closed in 1878. The river, although no longer navigable, passes under Carre Street and Southgate. The Nine Foot Drain, also unnavigable, meets the Slea just before Southgate.

Early in August he viewed the length of Gastineau Channel from the south, noting a small island in mid- channel. He later recorded seeing the channel again, this time from the west. He said it was unnavigable, being filled with ice.

Sinsheim consists of a town centre and 12 suburbs with a total population of 35,373 (as of December 2011). Its area encompasses . The Elsenz, an unnavigable left-bank tributary of the Neckar, flows through the town, reaching the Neckar at Neckargemünd.

Kimwenza is on a plateau above the main city of Kinshasa. It is near to the Petites Chutes de la Lukaya. It is a station on the Matadi–Kinshasa Railway, built between 1890 and 1898 to connect Matadi with Kinshasa, bypassing the unnavigable Livingstone Falls.

Manua'e consists of a ring of islands approximately 6–7 mi. in diameter, separated by unnavigable passages, rising just a few feet above sea level. The motus are covered primarily with coconut palms and tropical scrub with sandy beaches, and comprise a total land area of about .

The Battle of La Rochelle. Miniature from a 15th-century chronicle. On 21 June the English convoy arrived at La Rochelle and the battle began as Pembroke's ships approached the harbour. This lay at the head of an inlet which was partially unnavigable at low water.

The National Map, accessed August 15, 2011 Port Tobacco, the county seat of Charles County from 1658 to 1895, was an active port until that portion of the river became silted and unnavigable. When the railroad bypassed the town, business declined, and the county seat was moved to La Plata, Maryland.

The dam will submerge over 300 shoals, which had rendered the upper Hongshui unnavigable. The Longtan ship lift will be able to lift vessels of up to 500 tonnes. Chinese officials assert the dam and ship lift will turn the Hongshui into a "golden waterway" for reaching landlocked Guizhou and Guangxi provinces.

Today dams are used both for direct hydroelectric generation and to form pools for cooling other forms of generation. Dams create navigable stretches of river where they may have been unnavigable before. The first dams at Sunbury, Pennsylvania were to support year round ferry crossings. The creation of dams does have negative impacts.

Savuti roads, mainly the western Sandridge Road from Mababe Gate and the roads both north and south of the Savuti channel are typically thick sand and tricky to drive. When rain has fallen, driving along the marsh roads, as the wet black cotton soil becomes unnavigable, carries the risk of getting stuck.

Moncton lies at the original head of navigation on the river, however a causeway to Riverview (constructed in 1968) resulted in extensive sedimentation of the river channel downstream and rendered the Moncton area of the waterway unnavigable. On April 14, 2010, the causeway gates were opened in an effort to restore the silt-laden river.

By mid-November, ice on the Great Bear Lake rendered it unnavigable. By early January, temperatures dipped to , and by February, to . The fort's larder at that point consisted of some tens of thousands of fish and nearly of meat. Franklin endeavored to depart from the fort much earlier than in the previous season.

He cited the praetors Sextilius and Bellinus and the daughter of Antonius among the important Romans who were seized for a ransom. The pirates also mocked their captives if they were Romans. Piracy spread over the whole of the Mediterranean, making it unnavigable and closed to trade. This caused scarcity of provisions.Plutarch, Parallel Lives, Life of Pompey, 24–25.1.

Jinghong, Guanlei and Simao District river ports are open to the outside world. Many rivers open for commercial international trade with neighboring countries. Lancang River (known as the Mekong in its lower reaches) is the only international river linking 6 countries in Asia. Most of the rivers in Yunnan are unnavigable, except for short distances or in broken stretches.

By the 1950s, hyperspace travel was established as a typical means for traveling. Hyperspace is often depicted as blue, pulsing with Cherenkov radiation. Many stories feature hyperspace as a dangerous place, and others require a ship to follow set hyperspatial "highways". Hyperspace is often described as being an unnavigable dimension where straying from a preset course can be disastrous.

Nearly 500 rivers lace Panama's rugged landscape. Mostly unnavigable, many originate as swift highland streams, meander in valleys, and form coastal deltas. The Río Chepo and the Río Chagres are sources of hydroelectric power. The Kampia lake and Madden Lake (also filled with water from the Río Chagres) provide hydroelectricity for the area of the former Canal Zone.

These men carried supplies, furs and correspondence by boat, horseback and in backpacks for various HBC posts and personnel along the route. Furs stored at the York Factory would in turn be sold at London in an annual fur sale. Indians along the way were often paid in trade goods to help them portage around falls and unnavigable rapids.

Fremantle harbour and the Swan River, Western Australia A body of water, such as a river, canal or lake, is navigable if it is deep, wide and slow enough for a vessel to pass. Preferably there are few obstructions such as rocks or trees to avoid. Bridges must have sufficient clearance. High water speed may make a channel unnavigable.

Although not, as is sometimes believed, formally classified by the Royal Navy as unnavigable, the nearby Grey Dogs, or Little Corryvreckan, are classified as such.The West Coast pilot stated for the Little Corryvreckan or Grey Dog "Passage conditions 7.260 – It is reported that the excessive rate of the tidal stream and the narrow width of the E entrance channel create an unnavigable area just S of Eilean a’ Bhealaich, an islet in the centre of the E entrance. As a result, it is inadvisable to pass through this channel, and even with local knowledge passage should only be attempted in quiet weather at slack water.'" The Admiralty's West Coast of Scotland Pilot guide to inshore waters calls it "very violent and dangerous" and says "no vessel should then attempt this passage without local knowledge".

There, most of these people would set out overland along the large but shallow and unnavigable Platte River, which pioneers described as "a mile wide and an inch deep" and "the most magnificent and useless of rivers".Rogers, Brown and Garbrecht, p. 113 Steamboat navigation peaked in 1858 with over 130 boats operating full-time on the Missouri, with many more smaller vessels.

The middle section of the Oswegatchie, and the East Branch Oswegatchie between Gouverneur (village) and Cranberry Lake, are partially navigable by experienced canoeists. A two-mile section from southern Cranberry Lake to Inlet is unnavigable. From Inlet, the upper Oswegatchie is one of the wildest canoeable rivers in the Adirondacks.Jamieson, Paul F., and Donald Morris, Adirondack Canoe Waters: North Flow, 3rd ed.

Albert Lock, is a lock on the Jamestown Canal which by-passes an unnavigable section of the River Shannon between Drumsna and Jamestown in Ireland. The canal and lock are located in County Roscommon. The lock dimensions are 102 ft x 30 ft. The Shannon Commissioners constructed the lock in the 1848 as part of a widescale upgrade of the Shannon Navigation.

Above all, navigation on the Yukon was a seasonal enterprise. The river froze over in late September or early October and became unnavigable until the ice broke up in June. Even when it was flowing, the river was deeper in the spring as the snow melted and shallower in the summer and fall. There were no charts, buoys, or other aids to navigation.

A three-mile, £1.9m A591 bypass opened on 29 August 1971. The Lancaster Canal was built as far as Kendal in 1819, but the northern section was rendered unnavigable by the construction of the M6. Part of this section was drained and filled in to prevent leakage, and the course of the canal through Kendal has now been built over.

The first town meeting was conducted in his home. Many of the first settlers were from Massachusetts and Connecticut. The land contains parts of early land patents, including Skene's Little Patent and those issued to groups of British officers. In 1783, the Poultney River at the east town line suddenly changed course and became unnavigable due to a sudden influx of water.

Alexandria Port is one of the oldest ports in the world. The earliest port facilities were built in 1900 BC in the then-village of Rhakotis, to service coastal shipping and supply the island of Pharos (now part of the "Ras al-Tin" quarter). Plan of Alexandria c. 30 BC Over the centuries sand and silt deposits made the port unnavigable.

A strait is a naturally formed, narrow, typically navigable waterway that connects two larger bodies of water. Most commonly it is a channel of water that lies between two land masses. Some straits are not navigable, for example because they are too shallow, or because of an unnavigable reef or archipelago. Straits are also known to be loci for sediment accumulation.

View of Lachine Canal in 1826, a year after it opened. It bypassed the rapids west of the city, linking Montreal with other continental markets. Montreal was incorporated as a city in 1832. The opening of the Lachine Canal permitted ships to bypass the unnavigable Lachine Rapids, while the construction of the Victoria Bridge established Montreal as a major railway hub.

Numerous lakes are formed by the river or flow into it, but as a river its widest point is nearly across. The narrowest point is in the headwaters, an unnavigable marsh in Indian River County. The St. Johns drainage basin of includes some of Florida's major wetlands.The St. Johns River: Nominated as an American Heritage River , Environmental Protection Agency. Retrieved on July 17, 2009.

Stern of a ferro-cement barge The stretch of canal from Sharpness to Purton runs very close to the river. At a high spring tide they were separated by little more than the width of the towpath. The canal also has no locks, and owing to its width, not even any stop locks. Any damage to the canal bank could thus render the entire canal unnavigable.

The canal at Farleton, Cumbria, in the unnavigable northern section. The building on the left was used as stables for the packet boat services. The line of the canal was first surveyed by Robert Whitworth in 1772. In 1791, John Longbotham, Robert Dickinson and Richard Beck resurveyed the proposed line, and a final survey was carried out later the same year by John Rennie.

According to historical records, this harbor has developed since the 16th century. Previously Semarang Harbor was in Simongan hill; this area is now known as Gedong Batu (where the Sam Poo Kong Temple is located). Geologically the ancient port location of Semarang was less profitable. A large amount of sand and continuous mud deposits, causes the river that connects the city with the port to be unnavigable.

The Sulm is a river in the Heilbronn district of Baden-Württemberg, Germany. It is an unnavigable right tributary of the Neckar. It rises in the Löwenstein Mountains and after distance and elevation drop flows into the Neckar at Bad Friedrichshall, near Untereisesheim and Neckarsulm. Its valley together with its tributary valleys is also known as the Weinsberg Valley (Weinsberger Tal), after Weinsberg, which is located there.

The River Bulbourne is a small river in Dacorum, Hertfordshire, England. The word bourne derives from the Anglo-Saxon word for a stream. It is an unnavigable tributary of the River Gade, which flows into the River Colne, which in turn is a tributary of the River Thames. The Bulbourne is an example of a chalk stream, which is a watercourse that flows from chalk-fed groundwater.

The Port of Maryborough was opened in 1847 and in 1859 it was declared a port of entry. In 1856, after the river became unnavigable to larger vessels a new township and port were established. From the 1850s to the end of the century the port was one of Australia's busiest immigration ports. Some authorities called the port "Wide Bay" well into the 1860s.

Small craft, such as punts, are widely used in wetlands of the Spreewald. Larger craft can reach as far upstream as Leibsch, although the upper reaches are relatively shallow and are generally only used by leisure craft. Some intermediate reaches are unnavigable and by-passed by canals. For a stretch of about east of and flowing through Fürstenwalde, the river forms part of the Oder-Spree Canal.

Much of the canal subsequently became unnavigable: many of the structures were deliberately damaged by army demolition exercises; parts of the route were filled in and in some cases built over. In 1977 the Wilts & Berks Canal Amenity Group was formed with a view to full restoration of the canal. Several locks and bridges have since been restored, and over of the canal have been rewatered.

The Dudley No. 1 Canal ran close to the southern part of that works. It was also known as Lord Ward's Canal although there is an identically named branch from the northern portal of the Dudley Tunnel. Baron Ward was another title of the Earl of Dudley. The canal is completely unnavigable, having been partly infilled and in many places built upon by industrial premises.

He considered the Chilwitz people's practice of enhancing their conception of beauty by binding the skulls of infants to flatten foreheads to be repellant.Cox, p. 146. Venturing up the Columbia by canoe for the first time in June 1812, according to Cox's testimony, no problematic contact was made with Native American inhabitants until the party reached the first unnavigable rapids on the Columbia about upriver.Cox, p. 74.

Although it runs for 700 miles (1,100 km), it remains unnavigable for most part. For nearly its entire length the Huallaga is an impetuous torrent running through a succession of gorges. It has forty-two rapids (pongos) and it crosses the Andes, forming the Pongo de Aguirre gorge. From this point, from the Amazon, the Huallaga can be ascended by larger river boats (lanchas) to the port city of Yurimaguas, Loreto.

A high wooden tower was built near it to assist in the survey. alt=A small metallic shed with windows atop a sloping steel latticework. There is rock and shrubbery in the foreground In 1885, the state legislature created the Forest Preserve in response to fears that silt eroding from heavily logged slopes in the Adirondacks would render the Erie Canal unnavigable and adversely affect the state's economy.

The Grand Canyon of the Stikine is a stretch of the Stikine River in northern British Columbia, Canada. It has been compared to the Grand Canyon of the Colorado. The canyon is home to a large population of mountain goats and other wildlife. Officially the canyon is described as unnavigable by any watercraft, however there have been numerous successful descents made by expert whitewater paddlers since the first attempt in 1981.

On April 18, 1874, the Onward was reported to have been transferred from the Tualatin River to the Willamette River. The steamer was also said to have been “transported” from the Tualatin to the Willamette. According to later testimony of James D. Miller, the new owner, he had brought Onward down to the Willamette through the unnavigable rapids at the mouth of the Tualatin through the use of a coffer dam.

The Nam Hka rises in the Wa States, the Nam Hsim on the watershed range in the centre of the state. Rocks and rapids make both unnavigable, but much timber goes down the Nam Hsim. The lower part of both rivers forms the boundary of Keng Tiling state. The chief tributaries of the Mekong are the Nam Nga, the Nam Lwe, the Nam Yawng, Nam Lin, Nam Hok and Nam Kok.

The Uncompahgre is unnavigable, except at high water. The name given to the river comes from the Ute word Uncompaghre, which loosely translates to "dirty water" or "red water spring" and is likely a reference to the many hot springs in the vicinity of Ouray. Lake Otonawanda is the primary source of Ridgway's municipal water. Annua_%20water_report_2007_REVISED.pdf Ridgway has a humid continental climate (Koppen: Dfb) with four distinct seasons.

Parts of the canal above Worksop were affected by subsidence from local coal mines. By 1905, traffic had dropped to 45,177 tons, of which around 15,000 tons were coal and 11,000 were bricks. Some 40 boats were still working on the canal, although a short section between Staveley and Chesterfield had become unnavigable. The canal was making a loss, with receipts of £1,837 and expenditure of £3,883 in 1905.

Nearly 500 rivers lace Panama's rugged landscape. Mostly unnavigable, many originate as swift highland streams, meander in valleys, and form coastal deltas. However, the Río Chagres (Chagres River), located in central Panama, is one of the few wide rivers and a source of hydroelectric power. The central part of the river is dammed by the Gatun Dam and forms Gatun Lake, an artificial lake that constitutes part of the Panama Canal.

At 7 p.m. on 30 April, Montojo was informed that Dewey's ships had been seen in Subic Bay that afternoon. As Manila Bay was considered unnavigable at night by foreigners, Montojo expected an attack the following morning. However, Oscar F. Williams, the United States Consul in Manila, had provided Dewey with detailed information on the state of the Spanish defenses and the lack of preparedness of the Spanish fleet.

Had she been able to make anchor in the sheltered port of Duluth, the Benjamin Noble would have been saved. However, at a key moment in the storm, entry to the harbor was unnavigable after the obsolescent south pier torch light blew out.The Detroit Times April 30, 1914 p.2. Harbor laborer Stan Standen tried to reach the light to relight it, but was blown into the canal and lost.

Port Eads drawing from Feb. 9, 1884 Harper's Weekly. The Mississippi River in the 100-mile-plus stretch between the Port of New Orleans and the Gulf of Mexico frequently suffered from silting up of its outlets, stranding ships or making parts of the river unnavigable for a period of time. Starting in 1876, James Buchanan Eads (1820–1887) solved the problem with a wooden jetty system that narrowed the main outlet of the river.

Political protests in 1849 led to the burning of the Parliament Buildings in Montreal. Montreal was incorporated as a city in 1832. The city's growth was spurred by the opening of the Lachine Canal, which permitted ships to pass by the unnavigable Lachine Rapids south of the island. As the capital of the United Province of Canada from 1844 to 1849, Montreal attracted more English-speaking immigrants: Late Loyalists, Irish, Scottish, and English.

Filby Broad is one of five broads (lakes) in the Trinity Broads in Norfolk, England. It lies within the Broads National Park, adjacent to the village of Filby. The broad has an abundant selection of birds and wildlife. The lake is connected to Ormesby Broad and Rollesby Broad via a narrow inlet under a road bridge and via the River Bure and the main broads network by a now unnavigable cutting with a lock gate.

The lower course of the Maritsa/Evros forms part of the Bulgarian–Greek border and most of the Greek–Turkish border. The upper Maritsa valley is a principal east–west route in Bulgaria. The unnavigable river is used for power production and irrigation. The places that the river flows through include Pazardzhik, Plovdiv, (next to) Parvomay, Dimitrovgrad and Svilengrad in Bulgaria, Edirne in Turkey and Kastanies, Pythio, Didymoteicho and Lavara in Greece.

A river is shown near Fort Stanwix that does not connect to Wood Creek; the unnavigable region is labeled "Carrying Place one Mile". Wood Creek is a river in Central New York State that flows westward from the city of Rome, New York to Oneida Lake. Its waters flow ultimately to Lake Ontario, which is the easternmost of the five Great Lakes. Wood Creek is less than long, but has great historical importance.

When the river became unnavigable the buildings usefulness waned and was eventually abandoned. The Somerset Trust for Sustainable Development, now the Ecos Trust, purchased the site, designated as a brown field site, in February 2003, and worked with Somerset Buildings Preservation Trust (SBPT), English Heritage and local councils to redevelop it into a craft, heritage learning and small business centre, with the surrounding land being used for an eco-friendly housing development. It is a grade II listed building.

This excerpt from the Lewis and Clark map of 1814 shows the rivers of western Iowa and eastern South Dakota. The James (Jacque) is seen near the left center of the map. Originally called "E-ta-zi-po-ka-se Wakpa," literally "unnavigable river", by the Dakota tribes, the river was named Rivière aux Jacques (literally, "James River" in English) by French explorers. By the time Dakota Territory was incorporated, it was being called the James River.

There he met a war party of 35 Osage who were in search of their Mento (Wichita) enemies. The river being unnavigable, Fabry attempted unsuccessfully to buy horses from the Osage and other tribes to continue the journey. In September 1742 he abandoned the expedition. The Mallets meanwhile, apparently disgusted with Fabry’s leadership, had departed on foot for Santa Fe. They were also unsuccessful and turned back to Arkansas Post where they lived during the 1740s.

The coastline is steep and rugged in the south but lower and more accessible in the north, with excellent harbors at Malabo and Luba, and several scenic beaches between those towns. On the continent, Río Muni covers . The coastal plain gives way to a succession of valleys separated by low hills and spurs of the Crystal Mountains. The Rio Benito (Mbini) which divides Río Muni in half, is unnavigable except for a 20-kilometer stretch at its estuary.

The Tisza is navigable over much of its course. The river opened up for international navigation only recently; before, Hungary distinguished "national rivers" and "international rivers", indicating whether non-Hungarian vessels were allowed or not. After Hungary joined the European Union, this distinction was lifted and vessels were allowed on the Tisza. Conditions of navigation differ with the circumstances: when the river is in flood, it is often unnavigable, just as it is at times of extreme drought.

On 25 June 1862, Western World, Andrew, and E. B. Hale entered the North Santee River, South Carolina, intending to destroy an important railroad bridge inland. En route, parties from the warships set fire to several plantations and took over 400 slaves on board the steamers. During an expedition in Winyah Bay, South Carolina, Western World captured the British schooner Volante on 2 July. However, intense shore fire and the sharp, unnavigable bends of the river prompted Comdr.

Although the canyon is not directly accessible by roads, it is possible to view part of the canyon from the Grand County road (CR 1, or Trough Road) that passes along its southern rim, as part of the Colorado Headwaters Scenic Byway. The California Zephyr also travels through the canyon. Gore Canyon is also famous for its wild class V whitewater. "Captain" Samuel Adams considered it unnavigable by boat during his expedition in the 19th century.

In the early 1930s two leakages occurred that made it necessary to lower the water level in the canal and this, coupled with mining subsidence, caused its unofficial closure in 1932. By 1948 the canal was completely unnavigable but it did remain in water. Much of the line of the former canal remained intact and there are now plans to re-open part of it again as an amenity canal along with much of the Hollinwood Branch Canal.

The mouth of the Tualatin River was unnavigable, so it was necessary to portage around the Tualatin's mouth to get to a place where steamboats could run. Starting on May 29, 1865 a portage mule-hauled railroad on wooden tracks ran between the Tualatin River and Sucker Lake, a distance of about . This was called the Sucker Lake and Tualatin River Railroad. The main traffic was logs for Trullinger's mill on the east end of Sucker Lake.

Yale is an unincorporated town in the Canadian province of British Columbia. Located on the Fraser River, it is generally considered to be on the dividing line between the Coast and the Interior regions of the British Columbia Mainland. Immediately north of the town, the Fraser Canyon begins and the river is generally considered unnavigable past this point. Rough water is common on the Fraser anywhere upstream from Chilliwack and even more so above Hope, about south of Yale.

It is now the site of Royal Windsor Racecourse. The upstream part of Clewer Mill Stream from Bush Ait forms the entrance channel to Windsor Racecourse Marina, providing a maximum draft of , but much less during drought. The downstream section, below the marina is unnavigable by powered craft except for a short reach from the mouth of the stream upstream to Clewer Boatyard. At the downstream end, just before the stream rejoins the main river Thames, is White Lilies Island.

French colonial interests in Laos began with the exploratory missions of Doudart de Lagree and Francis Garnier during the 1860s. France hoped to utilize the Mekong River as a route to southern China. Although the Mekong is unnavigable due to a number of rapids, the hope was that the river might be tamed with the help of French engineering and a combination of railways. In 1886 Britain secured the right to appoint a representative in Chiang Mai, in northern Siam.

Although Hudson anticipated that the trip would take less than a month, it took 56 days. Most of the journey was by water, and ice on the Niagara River, inclement weather and ice on Lake Erie, and unnavigable portions of the Cuyahoga River contributed to the travelers' slow progress.Caccamo (1995), p. 4-6. Although ice on Lake Erie and the Buffalo River near Niagara Falls destroyed one boat, the group reached Cleaveland (present-day Cleveland, Ohio) on June 9, 1799.

The channel is navigable by large ships, only from the southeast, as far as the Douglas Bridge, approximately . Between the bridge and Juneau International Airport, approximately , it is navigable only by smaller craft and only at high tide. The channel is becoming increasingly unnavigable due to shallow water depths. The two principal causes for this are: # Isostatic rebound following the retreat of glacial ice sheets # Sedimentation and infilling of the Gastineau Channel by silty sediment produced by the Mendenhall Glacier and Mendenhall River.

If current trends continue, Gastineau Channel may eventually become dry or unnavigable or both. During isostatic rebound, the Earth's lithosphere (crust) is slowly rising because of buoyant forces, following the removal of a large mass on the surface. Thatcan be likened to an ice cube floating in a glass of water with a penny sitting on top. The weight of the penny makes the ice cube float lower, similar to the immense weight of a glacier on top of the lithosphere.

Underground toilet in The underground cities were well designed for protection against attacks. The few entrances were hidden by foliage and not easily spotted from outside. Inside, they took the form of a labyrinth of passageways which were unnavigable for outsiders, and could be sealed with large rock doors, around a metre high and shaped like mill-stones. These doors were built such that they could be rolled into a closed position relatively easily, but could not be moved from the outside.

The roads were extremely poor, and the river was unnavigable. Yet the demand for satisfactory transport was powerful, and eventually the Neath Canal was opened fully in 1795, running down from Glyn Neath to Neath itself. Even then the canal did not immediately serve the originating point of mineral products, and some short tramways were built to effect the connection. Indeed, coal from Aberdare was hauled uphill by horse power in the Cynon Valley to cross to Glyn Neath for the canal.

Following nationalisation in 1947–48, traffic did not revive, and all traffic had ceased by 1958, after which maintenance was run down. By 1961, combined with vandalism, the canal had become unnavigable, and its retention for pleasure use seemed unlikely. The Ashton Canal was one of seven stretches of canal, formerly designated as remainder waterways, that were re-classified by the British Waterways Act of 8 February 1983. Under the act, a total of of canal were upgraded to Cruising Waterway Standard.

Like many other aging artificial lakes, Canonsburg Lake has a problem with silting raising the bed of the lake. This process has already made some parts of the lake unnavigable, and if left untreated by dredging, it may ultimately make the lake unusable by boaters. A dredging program would cost approximately $3 million, but no funding exists to implement one. There is a website that has been created to raise the funds coordinated by local residents who live on the lake.

The River Gade in Hemel Hempstead runs through the landscaped "Watergardens" The Gade at Great Gaddesden The River Gade is a river running almost entirely through Hertfordshire. It rises from a spring in the chalk of the Chiltern Hills at Dagnall, Buckinghamshire and flows through Hemel Hempstead, Kings Langley, then along the west side of Watford through Cassiobury Park. After passing Croxley Green it reaches Rickmansworth, where it joins the River Colne. For its whole course the Gade is unnavigable.

The Itala being pulled across unnavigable terrain Several races have been held to re-enact the event, including the Great Auto Race of 1908 which raced from New York, west to Paris (by sea for part of the way). During most of the twentieth century other re- enactments could not be held, because of the establishment of the USSR after the 1917 Russian Revolution. After the dissolution of the Soviet Union in the early 1990s, racers were again allowed to race.

The canal was built to carry coal from the mines around Saarbrücken, hence its original name. After a private company failed in 1844, the State took over the project and started works in 1861, to be completed in 1867. Although predating the Freycinet programme by nearly 20 years, it was built directly to these dimensions, justified by the volume of coal to be exported from the Saar collieries in Germany. The river Saar downstream from Saarbrücken was unnavigable until the canalisation works were completed in 1986.

This was a fateful decision as the course of the Snake River later proved to be completely unnavigable by canoe, forcing the party to travel by foot and causing the men to endure severe hardship. After nine days of attempting to travel the river, they lost a man and two canoes in the rapids and reconsidered their plan. Embarking on foot, they divided into four parties and took different routes to approach the mouth of the Columbia. Hunt's party arrived on February 15, 1812.

Burcot in the 17th century was an important trans-shipment point on the Thames. The river at that time had become almost unnavigable between Oxford and Burcot, so that goods for Oxford had to be unloaded at Burcot and taken on by road. This led in 1605 to the formation of the Oxford-Burcot Commission, with the task of improving navigation. The village, lying mainly between the main road and the Thames, became a desirable Thames-side residential area in the late 19th century.

The Osnabrück Canal (, formerly the Zweigkanal Osnabrück) or SKO, is an artificial waterway, about long, that links the Mittelland Canal in central Germany with the port in the town of Osnabrück. It was built between 1910 and 1915 and runs largely parallel to the unnavigable River Hase, the greatest distance between the two being about . The 11th Armoured Division crossed the canal during World War II as it advanced across Germany.The Bridge at Halen (complete version) - an incident in Germany with 11th Armoured Division at www.bbc.co.uk.

Swaffham Bulbeck Lode has been rendered unnavigable by the removal of the lower lock gates, and the replacement of the upper lock gates with a guillotine gate which provides little headroom. Reach Lode is quite deep, as a result of the surrounding land sinking, and the banks being built up. The lower gate of the entrance lock has been replaced by a guillotine gate, enabling boats up to long to use it. Burwell Lode is a tributary of Reach Lode, and is another deep lode.

After a few days of exploring and trading the Columbia Rediviva ran aground briefly on a sandbar in what is now known as Grays Bay. A boat scouted ahead and determined that the channel Gray they been following on the north side of the Columbia quickly became unnavigable. Gray decided not to venture farther upriver, instead anchoring in Grays Bay for several days, trading and refitting the ship. Gray went ashore and later made a chart of Grays Bay and the mouth of Grays River.

Indigenous people that lived on the river include Karen, Nu, Lisu, Shan, Karenni, Wa, Tai, Mon, and Yintailai. The river has served as the only connection between villages in the region for thousands of years. Although unnavigable by larger craft such as barges or ferries, the river was widely used for transportation by small boats, because the rugged surrounding terrain had no major roads or paths. The southern part of the river has often been the setting of conflicts between the Burmese and Thai over political issues.

Most are unnavigable; many originate as swift highland streams, meander in valleys, and form coastal deltas. However, the Río Chepo and the Río Chagres, both within the boundaries of the city, work as sources of hydroelectric power. The Río Chagres is one of the longest and most vital of the approximately 150 rivers that flow into the Caribbean. Part of this river was dammed to create Gatun Lake, which forms a major part of the transit route between the locks near each end of the canal.

The Feisnecksee or Feisneck is a lake on the southeastern perimeter of the town of Waren in Mecklenburgische Seenplatte district in the German state of Mecklenburg-Western Pomerania. It lies at an elevation of 62.1 metres and its surface area is 1.94 km². The Feisnecksee is joined to the Binnenmüritz to the northwest by a very narrow, shallow and unnavigable ditch. The road runs over a small bridge here that is only wide enough for large vehicles to pass in one direction at a time.

Its rivers and creeks intersperse throughout the length and breadth of the municipality. It has ten (10) small unnavigable rivers. Majestic Mawo River traverses the eastern portion of the hinterlands finding its way at the town of Victoria before discharging into the Samar Sea. Among River has its outlet at Barangay Seven Hills, Caaguit-itan River at Barangays Alegria and Balite, San Juan River at Barangay San Juan, Palanit and Maludbalud Rivers at Barangay Palanit, Veriato River at Barangay Veriato and Caglanipao River at Barangay Caglanipao.

Before the lock and dam system was built on the Kentucky River, Gratz was one of the most prosperous towns in the area due to the business of portaging goods around an unnavigable part of the river (Lock #2 is just up river at Lockport). Goods were also ferried across the river and transported up KY 22 to Pleasureville, which had a railroad depot. The town's streets are laid out in a grid pattern. There is a local bank, and many large, well-built houses.

Additionally the first river lock, between Moissac and the Garonne itself, has been flooded by the barrage for the Golfech power station on the Garonne, and is permanently open to boats which can thus reach the Garonne and navigate a short distance of that river. The remaining six river locks are disused and unnavigable. A proposal exists to restore the five river locks between Moissac and Montauban, thus creating a waterway ring consisting of the Tarn from Moissac to Montauban, the Canal de Montech to Montech and the Canal de Garonne back to Moissac.

The Beles, however, is perennial, and the Rahad and Dinder are important rivers in flood-time. In the mountains and plateaus of Gambela and Kaffa in southwestern Ethiopia rise the Baro, Gelo, Akobo and other chief affluents of the Sobat tributary of the Nile. The Akobo, in about , joins the Pibor, which in about unites with the Baro, the river below the confluence taking the name of Sobat. These rivers descend from the mountains in great falls, and like the other Ethiopian streams are unnavigable in their upper courses.

On the morning of Thursday, January 13, 1876, Occident arrived at Jefferson, Oregon, a small settlement in Marion County, Oregon on the Santiam River. Jefferson, at river mile 9.0 was considered the head of navigation on the Santiam. No steamer had called at Jefferson since the Calliope, several years before. To reach Jefferson “was something of an accomplishment, since the Santiam, rapid and dashing, was practically unnavigable except during extreme high water and then only for a few days at a time.” The entire local population turned out to greet Occident.

Huntsville and Lake of Bays Railway engine, an example of a small locomotive on a narrow-gauge portage railway. A portage railway is a short and possibly isolated section of railway used to bypass a section of unnavigable river or between two water bodies which are not directly connected. Cargo from waterborne vessels is unloaded, loaded onto conventional railroad rolling stock, carried to the other end of the railway, where it is unloaded and loaded onto a second waterborne vessel. A portage railway is the opposite of a train ferry.

Two forts along the Oneida Carry were a key element of this supply chain. The Oneida Carry traversed an unnavigable section between what is now Rome, New York and Wood Creek that was between one and six miles long, depending on seasonal water levels. Wood Creek in its turn flowed into Oneida Lake, which flowed into the Oswego river that ran into Lake Ontario. On the other side of the Oneida Carrying Place was the Mohawk river, which flowed into the Hudson river, which in its turn flowed into the Atlantic ocean.

The Grand Union Canal with unnavigable river Bulbourne at Berkhamsted The River Bulbourne was historically rich in eels and other fish, fast-moving, and prone to frequent localised flooding. Over the years, human activity has had a significant effect on the river. Originally the source of the Bulbourne was near the hamlet of Bulbourne near Tring (which would make the river longer), in 1700 the source was said to be Parkhill Farm, near Pendley Manor (making the river shorter). Settlement in the valley began prior the Late Iron Age period.

The Yampa (below) joins the Green River in Echo Park The Yampa River is a typical Western snow-fed stream, but unlike most other rivers in the western United States its seasonal discharge patterns are not affected by large dams and water projects. The river forms a noticeably wide, shallow braided stream throughout much of its course. The lower three fourths of the Yampa, from the Elk River down, are navigable by small craft. However the meandering, shallow nature of the river can render the river unnavigable during late summer in low water years.

For several years around the 1850s it was unnavigable, as a dam was built across it to prevent the Regent's Canal losing water to it. After failed attempts to sell it in 1851, it was eventually acquired by the Regent's Canal Company and became a branch of that canal on 28 October 1857. The new owners removed the dam, and deepened and widened the channel.London Canals: Hertford Union: History When the Grand Union Canal Company came into existence on 1 January 1929, it became part of that network.

The Zambezi proved to be unnavigable, but the Strip remained, even as South West Africa became Namibia. On 2 August 1999, members of the Caprivi Liberation Army (CLA) launched an armed attack on government forces and buildings in the regional capital of Katima Mulilo in the Zambezi Region of north eastern Namibia. The same evening, president Sam Nujoma declared a state of emergency in the Caprivi province. Members of the Namibia Defence Force (NDF, Namibia's national army) and the Special Field Force (SFF, the paramilitary police unit) were deployed and repelled the attack.

The Worcester and Birmingham Canal renewed their lease in 1851 for a further 21 years, but traffic was severely hit by the opening of a railway link from Ashchurch to Evesham in 1864. Receipts had dropped to £139 in 1872, and the canal company did not renew their lease again. Somehow the navigation remained open, and as the commercial traffic declined, there was a gradual increase in pleasure usage. By the end of the Second World War only one barge was plying the stretch between Tewkesbury and Pershore, and the river above Pershore became unnavigable.

The Thames Commissioners were also in financial difficulties, and the Thames was nearly unnavigable from Oxford to Lechlade after 1855. In 1866, plans to convert the canal to a railway were rejected by Parliament, but the Thames Commissioners were replaced by the Thames Conservancy, and most of the river was soon returned to a navigable state. The condition of the canal continued to decline. Complaints were made about its state in 1874 and 1885, which resulted in surveys being undertaken, but little was done to remedy the situation.

The railway was chartered by a senior officer of the CPR and immediately leased for 999 years to the CPR. The CPR built the line to obtain mining traffic that was then being sent by boat along Kootenay Lake and south to the United States. By building along the unnavigable Kootenay River between Kootenay Lake and the Columbia River, the CPR used steamers to connect with its mainline at Revelstoke up the Arrow Lakes and the Columbia River. In 1891, the first train travelled between Nelson and Robson.

The landscape also played its part- limiting major, long-term water movement by rivers that were unnavigable for long stretches, contrary currents, and lack of good coastal harbors. Few native powers attempted any significant upgrades involving intensive sailing technology, or took to the oceans with long-distance ships in the European, Polynesian or Chinese manner. No African equivalent of the famous, ocean-spanning Chinese fleet admiral Cheng Ho was to emerge, although a number of inland captains rose to prominence. The days of Carthage long gone, African naval power remained primarily a localized phenomenon.

Ordnance Survey mapping The river, once an unnavigable series of braided streams broken up by swamps and ponds, has been managed by weirs into a single channel. Periodic flooding, which shortened the life of many buildings in the lowest part of the city, was normal until major flood control works were completed in the 1970s. Kensington Meadows is an area of mixed woodland and open meadow next to the river which has been designated as a local nature reserve. Water bubbling up from the ground as geothermal springs originates as rain on the Mendip Hills.

Off-duty staff were mustered to conduct search and rescue operations for the remaining crew members. Owing to the extreme weather conditions, Arctic darkness, and unnavigable ice, the base relied largely on the Thule representative of the Royal Greenland Trade Department, Ministry of Greenland, Jens Zinglersen, to raise and mount the search using native dog sled teams. Three of the survivors landed within of the base and were rescued within two hours. For his initial actions and later services, Zinglersen received the Air Force Exceptional Civilian Service Medal on 26 February 1968 at the hands of the U.S. Ambassador, K. E. White.

El Porvenir is the modern name for a ruined city of the pre-Columbian Maya civilization located in the Petén department of Guatemala. Ron Canter, in his paper "The Usumacinta River Portages in the Maya Classical Period" argues that El Porvenir was the first point at which the ancient Maya portaged to avoid the unnavigable portions of the Usumacinta River. A fragment of stone found at the site and aptly called the "El Porvenir Fragment" was also discovered that bore the name of Ha' K'in Xook, the sixth ajaw of Piedras Negras, suggesting a connection to the site.

Elk Neck Peninsula (center) in 2020 Elk and Bohemia Rivers, from Elk Neck Peninsula, c. 1898 Elk Neck Peninsula is in Cecil County, Maryland, between the towns of Elkton and North East, Maryland. Native American and colonial travelers often canoed or sailed up the Chesapeake Bay to Elkton, where the Elk River became unnavigable, and then walked or took some form of surface transportation to the Delaware Bay watershed, since this was the shortest surface crossing. Native Americans of the area, including the Nanticoke and Lenni Lenape, hunted and fished, as well as established semi-permanent camps.

The Zouave statue The Zouave statue, 3 June 2016 The general public took the original bridge as a measuring instrument for water levels in times of flooding on the Seine: access to the footpaths by the river embankments usually was closed when the Seine's level reached the feet of The Zouave; when the water hit his thighs, the river was unnavigable. During the great flood of the Seine in 1910, the level reached his shoulders. The French Civil Service used the Pont de la Tournelle, not the Pont de l'Alma, to gauge flood levels, and since 1868 uses the Pont d'Austerlitz.

In addition, the merchants of Rauma and Pori had impressively large fleets of sailpowered merchantmen, which made up a large fraction of the total merchant navy of the Russian empire. The large-scale use of sail ships continued until the 1930s, even while the steampower started to dominate the international seatraffic. The building of the Tampere–Pori and Kokemäki–Rauma railroads connected the province into Finnish inland and diminished the importance of unnavigable Kokemäenjoki river as a means of transport. After this, the ports of Rauma and Pori have remained among the most important export ports for the Finnish industry.

This light was erected to replace the old Frank's Island Light, which was abandoned when the neighboring channel became unnavigable. Rather than construct a new tower, in 1855 the iron tower of the Head of Passes Light was moved to a point near the mouth of Pass A L'Outre, the channel of the Mississippi River extending east from Head of Passes, and equipped with a third order Fresnel lens. The first keeper, John Lory, had most recently been keeper at the now deactivated light. When constructed at Head of Passes in 1852, it was America's tallest cast iron lighthouse.

The place earlier known as Shringavali, named after the sage Shringi, was once covered with dense and unnavigable forests and inhabited by wild animals. The place was considered so treacherous that it was used by the kings of Rewa State, who ruled the area till 1947, as an open air prison for detaining errant civilians and officers. In the 1800s, there were three separate rulers of Singrauli (previously known as Sidhi), ruling three parts of the territory: First were the Chandela rulers from Bardi (Khatai). Second was Rajasahab Madwas, He was a Baland Rajput, ruled in Majhauli block mostly.

The Ancient Ship () is a Chinese novel by Zhang Wei, first published in 1987. The novel spans four decades of Chinese history beginning with the creation of the People's Republic in 1949, then difficult periods of land reform, as well as famine, the Cultural Revolution and the Great Leap Forward. It is the story of three generations, the Sui, Zhao and Li families who live through these difficult times. The novel is set in the fictional northern town of Wali which once had a thriving river and docks, but whose river shrank to the point of being unnavigable.

On August 26, 1901, prospector E. T. Barnette and Captain Charles W. Adams ran the steamer Lavelle Young aground up the Chena River which they mistakenly believed to be a distributary which would allow them to detour upstream from the unnavigable Bates Rapids to their intended destination in Tanacross. In accordance with their agreement, Barnette, his wife Isabelle, five hired hands, and 130 tons of supplies were unloaded onto the riverbank. The crew quickly built two log cabins and a series of tents, establishing a trading post named Chena City. Adams returned downstream, and Barnette had his first visitors only hours later.

The average elevation is . The mountains are highest in the north where they reach more than ; in the south they rise no higher than . The highest point in the north is the Kawagebo Peak in Deqin County on the Diqing Plateau, which is about ; and the lowest is in the Red River Valley in Hekou County, near the Vietnamese border, with an elevation of . The eastern half of the province is a limestone plateau with karst scenery and unnavigable rivers flowing through deep mountain gorges; the western half is characterised by mountain ranges and rivers running north and south.

During the navigation improvements of 1803–1811, a new lock at Struncheon Hill was built, keeping a permanent high water level at the lock, and it would be unlikely the lower chamber was used after this. Trade declined on the navigation, but some of the last cargoes were to the mills at Wansford, and so kept the lock going for a few more years than the rest of the canal. In 1967 a trip to the lock showed it unnavigable, but in reasonable condition. At some point the swing bridge was replaced with a fixed structure.

Another railway was a local line in the Amazonian jungle. The Madeira-Mamoré Railroad runs in a loop around the unnavigable section to Guajará-Mirim on the Mamoré River.Brazil's Devil's Railway gets new lease of life BBC Although the idea of river navigation was complicated, in 1869, the North American engineer George Earl Church obtained from the Bolivian government a concession to create and explore a navigation enterprise that linked the Mamoré and Madeira Rivers. However, shortly afterwards, he realized the real difficulty of this undertaking, and the plans were definitively changed to the construction of a railroad.

Morwellham Quay was originally set up by the Benedictine monks of Tavistock Abbey, which was founded in 961, to carry goods to and from Plymouth on the River Tamar, since the River Tavy was unnavigable. By the 12th century, tin ore was being transported through the quay, followed by lead and silver ores in the 13th century.History Later, copper deposits were also discovered at the Quay itself and the George and Charlotte Mine opened in the 18th century. In addition, by 1800, manganese deposits were being extracted from the northern and western edges of Dartmoor and being brought to Morwellham.

The fall line is the spot where a river becomes unnavigable when sailing upstream and where water flowing downstream can power a mill. State Senator John Lewis Gervais of the town of Ninety Six introduced a bill that was approved by the legislature on March 22, 1786, to create a new state capital. Considerable argument occurred over the name for the new city. According to published accounts, Senator Gervais said he hoped that "in this town we should find refuge under the wings of COLUMBIA", for that was the name which he wished it to be called.

The Brda is part of the Odra-Vistula waterway, connecting these two rivers via the Warta and Noteć Rivers and the Bydgoszcz Canal since end of the 18th century. The waterway is navigable for modest barges (of CEMT Class II) but with a limited draught. With the expansion of the European Union to the East, the waterway could play an important role. It is a link in the much longer connection with Eastern Europe via the Vistula, Narew, Bug, Mukhavets, Pripyat, and Dnieper Rivers, but this connection remains unnavigable due to a dam near Brest, Belarus.

The first canal was finished in 1872, but due to low water, was not passed through until January 21, 1873, when Onward made the first trip. With the completion of the Willamette Falls Locks in 1873, and with navigation of the Tualatin River already difficult due to its low water and numerous snags and sinkers, the second canal was never built and the idea of a Sucker Lake passage was never realized. After 1890, business fell off, particularly with the Panic of 1893. By 1895, when the Corps of Engineers declared the Tualatin unnavigable, there was not any river traffic on it anyway.

Location of Alsek River The Alsek starts at the confluence of the Dezadeash River and Kaskawulsh River in Kluane National Park and Reserve. After flowing south into the northwestern tip of British Columbia, it is joined by the Tatshenshini River in Tatshenshini-Alsek Park. It reaches the Pacific Ocean at Dry Bay, in the Gulf of Alaska, south of Yakutat, Alaska, close to the northern end of the Alaska Panhandle. Although the river is navigable by kayak or rubber raft in its northern reaches, it rapidly becomes unnavigable—for any but the most experienced and skilled kayakers—at Turnback Canyon.

Historians such as David Landes and sociologists Max Weber and Rodney Stark credit the different belief systems in Asia and Europe with dictating where the revolution occurred. The religion and beliefs of Europe were largely products of Judaeo-Christianity and Greek thought. Conversely, Chinese society was founded on men like Confucius, Mencius, Han Feizi (Legalism), Lao Tzu (Taoism), and Buddha (Buddhism), resulting in very different worldviews. Other factors include the considerable distance of China's coal deposits, though large, from its cities as well as the then unnavigable Yellow River that connects these deposits to the sea.

There are plans to build a second dam on the river, upstream from the Scofield Dam, called the Gooseberry Narrows Dam. The proposal has met with opposition out of concern for environmental impacts on trout fisheries in the Price River headwaters and the planned diversion of the water impounded by the dam out of the Colorado River basin to supplement the irrigation systems of the Sanpete Valley. As a result of the planned dam the Price River was included on the American Rivers list of the top ten endangered rivers in the United States in 2005. The Price is a small, shallow river and is normally unnavigable.

Because of extremely poor roads, the cost of bringing goods such as lumber, ashes, grain, and fur to the coast could be quite high if water transport was unavailable. Most American rivers were made unnavigable by rapids and waterfalls. Up and down the Atlantic coast, companies were formed to build canals as cheaper ways to move goods between the interior of the country and the coast. Well aware that to stay independent the nation needed to grow strong and develop industries, the news from Europe rekindled a number of previously dropped canal or navigations projects and began discussions leading in the next decades to many others.

When the river became unnavigable to larger vessels a new township was surveyed by Surveyor Labatt in 1852 and in 1854 the small iron- hulled screw steamship William Miskin, built in 1852, 124 tons discharged cargo at the Old Township and was possibly the first steamship to visit the Mary River. In 1856, the people officially moved down to the new township, where the port was established. Wool became an important commodity and exports through the port in 1860 totalled £107,000 with wool accounting for £98,000 of that figure and imports totalled £71,456. At this time Maryborough was the only port in the colony with a favourable trade balance.

This then required transfer to a portage railroad (first hauled by mules, later by steam engines), which proceeded to the top of the Cascades. Travellers then boarded another steamboat to proceed up river to the Dalles, where the process would be repeated for a portage around Celilo Falls and the other rapids upriver from the Dalles, which like the Cascades were unnavigable both upstream and downstream. This, the middle river, was the route Hassalo ran on from 1880 to 1888. Hassalo’s first captain on the middle river was Fred Wilson, followed by H.F. Coe, then Captain John McNulty for the last five years on the Columbia.

Johnson's Shut-Ins panorama A shut-in is a type of rock formation found in Ozarks streams where they carve through a mountain range, causing a complex of pools, rivulets, rapids and plunge pools. Shut-ins are inherently confined to a narrow valley or canyon, with the river valley widening out both above and below the formation. Because the rock resists downcutting, streams typically descend at relatively steep gradient through shut-ins, with the downstream terminus of the formation often marked by a very large plunge pool. The river becomes unnavigable at shut-ins even by canoe due to the rapids and narrow channels.

Maintenance costs far exceeded revenue, and what little traffic there was, was confined to the Lough Erne end of the canal, as the summit was mostly unnavigable, and there was only sufficient water during eight months of every year. However, there was a slight improvement in traffic in 1880, when W. R. Rea, the secretary of the Lagan Navigation Company, set up a new carrying company using smaller boats. There was a vague promise of government aid for any company interested in taking it over. A series of negotiations then took place, but the government failed on three occasions to pass a bill to authorise the sellout to the Lagan Canal.

In 1848, Amos A. Williams entered ligation against the Savage Manufacturing Company and his brothers George, Cumberland and Nathanial claiming they tried to force him into poverty from indebtedness during his illness. The mill had a good source of water power, but the river was unnavigable for delivery. Horses and mules were used to deliver the product to market. In March 1835 the Savage Railroad Company was incorporated by Amos and Cumberland Williams and other investors with $15,000 in stock to bring a rail spur to the mill off the Patuxent branch of the Baltimore and Ohio Railroad, and in the 1870s a Bollman Truss Bridge was moved to the spur.

Charente is one of the original 83 departments created during the French Revolution on 4 March 1790. It was created from the former province of Angoumois, west and south of Saintonge. Prior to the creation of the department, the area was not a natural unit, but much of it was commercially prosperous thanks to traditional industries such as salt and cognac production. Although the river Charente became silted up and was unnavigable for much of the twentieth century, in the eighteenth century it provided important links with coastal shipping routes both for traditional businesses and for newly evolving ones such as paper goods and iron smelting.

Melissa Darby has established the Drake Anchorage Research Collaboration (DARC) in support of the possible Whale Cove landing site, although she says she "can not say for sure where he (Drake) was." Whale Cove is the site identified by Bawlf as Drake's careening location. Ward, Bawlf and Darby do not agree on the general route taken by Drake, but all have Drake's careening site at Whale Cove. Whale Cove remains an unnavigable bay in a dangerous part of the Oregon coast: mariners are advised to stay at least 600 yards offshore for the distance one mile north of Whale Cove to one mile south of Whale Cove.

Map of the Green River watershed Fur traders tried to use the Platte River, the main route of the eastern Oregon Trail, for transport but soon gave up in frustration as its many channels and islands combined with its muddy waters were too shallow, crooked and unpredictable to use for water transport. The Platte proved to be unnavigable. The Platte River and North Platte River Valley, however, became an easy roadway for wagons, with its nearly flat plain sloping easily up and heading almost due west. There were several U.S. government-sponsored explorers who explored part of the Oregon Trail and wrote extensively about their explorations.

The region around the Tar River was continuously inhabited by indigenous people for 12,000 years before the first Europeans arrived, when it was home to the Tuscarora people. Europeans began settling the area after the Tuscarora War in the early 1700s. Like many other early settlements in colonial America, they settled along the fall line between the Piedmont and coastal plain, which is the point at which rivers become unnavigable sailing upstream and water flowing downstream can power a mill. The Falls of the Tar River Primitive Baptist Church was established in 1757, which still meets today, although its original building has since been replaced.

The Huddersfield Narrow Canal was abandoned in 1944. The Peak Forest Canal had ceased to be used by the start of the Second World War in 1939, and the Ashton Canal was unnavigable by 1962. However, the Peak Forest Canal Society was formed, and working with the British Waterways Board, the local councils through which the canals ran, and the Inland Waterways Association, the Ashton Canal and the lower Peak Forest Canal were reopened in 1974, bringing the junction back into use. A campaign for the restoration of the Huddersfield Narrow Canal began in the same year, but was not completed until 2001, helped by public funding from the Millennium Commission.

Tappan Zee Bridge Sparkill Creek cuts through the north end of the Hudson Palisades, providing easy access to the fertile valley of the unnavigable upper Hackensack River. "Tappan Landing," "Tappan Slote", or "Taulman Landing," as the little port on the Hudson River was called, thus became the original port for southern Orange County. The valley in the Palisades created by the creek also provided a way for the Erie Railroad to easily reach the Hudson, and the railroad built a long pier in 1839 as its principal terminal. The pier and the nearby mountains suggested a new name for the community, which was incorporated as a village in 1850.

Map of the Green River watershed Fur traders tried to use the Platte River, the main route of the eastern Oregon Trail, for transport but soon gave up in frustration as its many channels and islands combined with its muddy waters were too shallow, crooked and unpredictable to use for water transport. The Platte proved to be unnavigable. The Platte River and North Platte River Valley, however, became an easy roadway for wagons, with its nearly flat plain sloping easily up and heading almost due west. There were several U.S. government sponsored explorers who explored part of the Oregon Trail and wrote extensively about their explorations.

The proportion of New Zealand's area (excluding estuaries) covered by rivers, lakes and ponds, based on figures from the New Zealand Land Cover Database, is (357526 + 81936) / (26821559 – 92499–26033 – 19216) = 1.6%. If estuarine open water, mangroves, and herbaceous saline vegetation are included, the figure is 2.2%. The Waikato River flowing out of Lake Taupo The mountainous areas of the North Island are cut by many rivers, many of which are swift and unnavigable. The east of the South Island is marked by wide, braided rivers such as the Wairau, Waimakariri and Rangitātā; formed from glaciers, they fan out into many strands on gravel plains.

When the river became unnavigable, the building was no longer needed, and it was eventually abandoned. The Somerset Trust for Sustainable Development, which became the Ecos Trust, purchased the site, designated as a brown field site, in February 2003, and worked with Somerset Buildings Preservation Trust, English Heritage and local councils to redevelop it into a craft, heritage learning and small business centre, with the surrounding land being used for an eco-friendly housing development. It is a grade II listed building. Parrett Ironworks from the Carey's Mill Bridge The newest bridge across the Parrett is Cocklemoor Bridge, a pedestrian footbridge close to the Great Bow Bridge.

Aside from the sophisticated, cultured, and advanced Vepajans that Napier first meets, the human natives of Amtor are generally inhospitable, often trying to murder Napier, kidnap his princess, or both. Their nations are rather loosely connected, partly because the geography is strewn with impassable mountains, impenetrable forests, and unnavigable seas (which Napier nevertheless passes, penetrates, and navigates), and partly because Amtorian maps are inaccurate. In spite of their relative isolation from each other, a worldwide language is current among all peoples. The level of culture runs the spectrum from savagery to advanced technology; some nations possess a longevity serum, atomic ray guns, and nuclear powered ships.

In 1884 the California legislature banned hydraulic mining as the flow of tailings from hydraulic mines in the Sierra Nevada was silting up the Sacramento River, making it unnavigable. However, the Trinity hydraulic mines escaped this ban, as the remote and swift flowing Trinity River was not considered a navigable watercourse. Nevertheless, the largest deposits had been played out by the 1920s, and the mining settlements were abandoned or fell into decline. This brought on the last stage of commercial gold mining along the Trinity, as floating dredges (called "doodle-bugs" by the miners) were used to turn over the river bottoms that had been inaccessible by the placer miners a half-century earlier.

523 Bridges like this were common in the Middle Ages, the best known being London Bridge, but most have long since been demolished because of their obstruction to the river flow and to shipping. The 'Glory Hole' The Glory Hole is the name given by generations of boaters to the High Bridge in Lincoln. It has a narrow and crooked arch which sets a limit on the size of boats using the Witham and going from Brayford Pool, at the start of Foss Dyke, to Boston and the sea. Since the 14th century the bridge has contributed to floods in Lincoln and after any heavy rain the bridge is virtually unnavigable, which may be why it got its name.

Then, water is released from this and other dams on the upper tributaries of the Tennessee River in order to maintain an eight-foot-deep navigation channel for barges on the inland waterway of the river from Knoxville down to its mouth at the Ohio River. If it were not for these releases of water, parts of the Tennessee River would become unnavigable. Furthermore, the water that is released is then available for all the drinking-water supplies of cities and towns downstream, and in addition, it is available for watering farms during the droughts. Another secondary purpose of the Douglas Dam and Douglas Lake is for recreational boating, swimming, and fishing.

The Mississippi in the 100-mile-plus stretch between the port of New Orleans, Louisiana and the Gulf of Mexico frequently suffered from silting up of its outlets, stranding ships or making parts of the river unnavigable for a period of time. Eads solved the problem with a wooden jetty system that narrowed the main outlet of the river, causing the river to speed up and cut its channel deeper, allowing year-round navigation. Eads offered to build the jetties first, and charge the government later.Eads Jetties Plaque, Fort Jackson, LA. If he was successful, and the jetties caused the river to cut a channel 30 feet deep for 20 years, the government agreed to pay him $8 million.

The Board of Trade had powers to set new rates if they did not approve of the existing rates. The Strabane Canal Company argued that it was a private company, and therefore exempt from the Act, while the Duke of Abercorn, who owned the canal, appealed to the House of Lords. Lieutenant-Colonel Addison was duly despatched from the Board of Trade to inspect the canal and the affairs of the company in 1898. Despite local allegations that the canal was unnavigable, and the findings of Addison that the east bank needed to be strengthened, the channel was shallow in places, and the gates needed to be repaired, he ruled that the canal was still navigable.

The Ashton Canal was opened shortly after 1792, and was unusual in the north-west, as it was built as a narrow canal, suitable for boats , whereas most of the neighbouring canals were suitable for wide-beam boats. It was effectively unnavigable by 1962, but re-opening was spearheaded by the Peak Forest Canal Society and the Inland Waterways Association, and with assistance from British Waterways and local councils, it re-opened in 1974. The canal is long, has 18 locks, and passes through a dense urban landscape. Between locks 10 and 11 is a short spur which was once the start of the Stockport Branch Canal, which ran on the level for to Stockport.

The original truss Landing Lane Bridge in 1991 The current span officially was opened in 1895, replacing a previous structure. However, the entire metal grate deck and steel truss was replaced in 1995 with a slightly wider modern metal beam structure and an asphalt covered roadway. The piers were only refurbished rather than being replaced, as this would have required Coast Guard approval, which would have added years to the refurbishment project. (The river, though unnavigable at this location, is under Coast Guard jurisdiction as it is tidal from Raritan Bay to a few hundred yards north of the Landing Lane Bridge.) This complication also prevented the bridge from being replaced with a four-lane-wide span.

Beach and the other Escarpment resort owners tried to discredit Guyot and his findings, but within years they had been verified by others.Evers, 487-95. A few years later, in 1885, the state legislature responded to increasing concerns that rampant logging in the Adirondacks might cause erosion that would silt up the Erie Canal and make it unnavigable by creating the Forest Preserve, under which any state land in several counties was to be left "forever wild". The Catskills were included in a later, revised version of the bill, when the Ulster County delegation saw a chance to take some tax-delinquent properties, and the county's obligations to the state, off the counties' hands.

At that time, and for the entire operational life of this vessel, the Columbia River was not continuously navigable from Portland at tidewater. Instead the river was divided into reaches known as the lower, middle, and upper Columbia, each one separated by a long stretch of essentially unnavigable rapids. The reaches were like giant steps, and once a steamboat was built on a step, it could, with some danger, descend to a lower step by running the rapids. However, in general no steamboat could proceed up a step, although in some cases steamboats were dismantled and carried around the major rapids or smaller ones might be winched up by a line attached to the bank.

However, citing national security concerns, the CIA and FBI experts opposed the Soviet plan by arguing that while the plan was feasible, it would compromise NORAD and thus the dam could be built at only an immense cost."Ocean Dams Would Thaw North" Popular Mechanics, June 1956, p. 135. Soviet scientist D. A. Drogaytsev also opposed the idea, stating that the sea north of the dam and north-flowing rivers in Siberia would become unnavigable year round, and the Gobi and other deserts would be extended to the northern Siberia coastline. American Charles P. Steinmetz earlier proposed to widen the Bering Strait by removing St. Lawrence Island and parts of Seward and Chukotski Peninsulas.

Casement worked in the Congo for Henry Morton Stanley and the African International Association from 1884; this association became known as a front for King Leopold II of Belgium in his takeover of the Congo Free State. Casement worked on a survey to improve communication and recruited and supervised workmen in building a railroad to bypass the lower 220 miles of the Congo River, which is made unnavigable by cataracts, in order to improve transportation and trade to the Upper Congo. During his commercial work, he learned African languages. In 1890 Casement met Joseph Conrad, who had come to the Congo to pilot a merchant ship, Le Roi des Belges ("King of the Belgians").

Construction of the bridge by a Mr White of Weybridge was started in 1748 and was completed in 1750. The construction was paid for by Samuel Dicker who was the MP for Plymouth and owned property in Walton on Thames. By paying for its construction Dicker also obtained the right to collect tolls from users of the bridge under the statute. Opponents to its construction comprised ferry operators, who foresaw an impact their livelihoods; the bargees who thought it would make the river unnavigable; and a minority of residents of Walton-on-Thames who were worried about an influx of undesirable elements from substantially rural and wayfaring villages of West Middlesex north of the river.

The dispute was protracted and in 1281 twelve men of Derby alleged that the Derwent, so clear in the time of John that ships regularly came to trade foodstuffs and other goods at Derby, was now unnavigable because of the abbot's weirs at Borrowash.Colvin, H. M. (1939) Dale Abbey: granges, mills and other buildings, p. 153. In 1283, however, the mills were at the centre of an eruption of violence. The Order of Saint Lazarus, a military order whose English base was at Burton Lazars in Leicestershire, had been expanding its holdings around Spondon where it held the advowson of the church,Cox, J. C. (1877) Notes on the Churches of Derbyshire, volume 3, p. 293.

Aerial view of Roggenplaat shoal During the Roman Era it was the major mouth of the Scheldt River. Before the St. Felix's Flood of 1530, it flowed north as a river from the east end of the Westerschelde, turned west a little west of Bergen op Zoom, and then west along the north edge of what is now the Verdronken Land van Reimerswaal, and after that widened into an estuary. Later parts of that lost land were reclaimed, restricting part of the connection to the Scheldt River to a narrow channel called the Kreekrak, which silted up and became unnavigable. In 1867 the Kreekrak was closed off with a railway embankment, connecting in the process the island of Zuid-Beveland to the mainland of North Brabant.

The Uncompahgre is unnavigable except at high water. The name Uncompahgre () comes from the Ute word Uncompaghre, which loosely translates to "dirty water," "red lake," or "red water spring" and is likely a reference to the many hot springs in the vicinity of Ouray.In the journal of Francisco Silvestre Vélez de Escalante's 1776 expedition, the author states that the Native American name for the river was Ancapagari, which translated to Spanish as Laguna Colorado and referred to a hot, bad tasting, red lake from which its waters came. The Spanish name for the river at that time was Rio de San Francisco, apparently so named by explorer Juan Maria de Rivera on one of his two earlier expeditions (1761 and 1765).

A local guide informed him of a difficult yet traversable pass running parallel to that of Kheibar called the pass of Chatchoobi. Setting out on 26 November from near Jalal Abad the Persian army arrived at Barikab (33 kilometres from the Kheibar pass) where Nader divided his army, leaving Morteza Mirza behind with the bulk of the forces at his disposal and sending forth 12,000 men to the Kheibar pass under Nasrollah Qoli whilst he gathered 10,000 chosen light cavalry under his direct command. Beginning an epic flank-march of over 80 kilometres through some of the most unnavigable terrain in Asia Nader reached Ali-Masjed whence the 10,000 curved their route of march northwards and onto the eastern end of the Kheibar pass.Ghafouri, Ali (2008).

His scouts located the Pocumtuc village of Agawam, where the Bay Path trade route crossed the Connecticut River at two of its major tributaries—the Chicopee River to the east and Westfield River to the west—and just north of Enfield Falls, the river's first unnavigable waterfall. Pynchon surmised that traders using any of these routes would have to dock and change ships at his site, thereby granting the settlement a commercial advantage. It was initially named Agawam Plantation and was allied with the settlements to the south that became the state of Connecticut, but it switched allegiances in 1641 and was renamed Springfield in honor of Pynchon's native town in England. Of these settlements, Hartford and Springfield quickly emerged as powers.

His timing was ill-advised, as the Jordan River was often unnavigable in the August dry season, and he and his mate needed to portage their boat on several occasions. When his mate would go no further, Costigan abandoned his effort to sail the length of the Jordan after eight days, and instead traveled overland the remainder of the distance to the Dead Sea, arriving weakened by insufficient water supplies on the way. Once he arrived at the Dead Sea, Costigan, having run out of his supplies of fresh water, resorted to drinking the water of the sea, leading to further dehydration and fever. Before his illness incapacitated him, he spent several days sailing back and forth about the sea, taking depth soundings.

Springfield hoped to pursue peaceful relations with the Natives so as to better facilitate trade and communal farming, whereas Hartford – and many of Connecticut's early settlers – had fought the bloody Pequot War to claim their territory, and thus took a more militant view. This difference of opinion led to Agawam (Springfield) annexing itself to Massachusetts in 1640. At that time, William Pynchon was named magistrate of the settlement, and the town's name was changed to Springfield in Pynchon's honor. (Pynchon was from Springfield, Essex.) Metro Center Springfield was founded on the Connecticut River, just north of the River's first falls unnavigable by seagoing vessels, (the Enfield Falls.) Thus, in founding Springfield, the business-minded Pynchon assured that all northern river trade and travel ran through Springfield.

Beginning an epic flank-march of over 80 kilometres through some of the most unnavigable terrain in Asia Nader reached close to Ali-Masjed whence the 10,000 curved their route of march northwards and onto the eastern end of the Kheibar pass. The Persian cavalry formed ranks and swept into a deadly charge against the startled forces who despite being twice their number, and resisting the initial shock of finding the Persians behind their positions, managed to somehow put up a valiant last stand before they were all either killed, taken prisoner or fled the field of battle leaving the governor of Peshawar to be made captive. The Russian general Kishmishev wrote of the campaign as a "masterpiece" of warfare.

Although the Permin was only suitable for smaller ships and mainly used by the population of the local region to ply their trade in small, open boats, the Hanseatic League believed their trading privileges were being affected. Moreover, at the end of the 14th century, trade in the Baltic was heavily disrupted by the Victual Brothers, who were supported by the Mecklenburg dukes and the Pomeranian Duke Barnim VI from time to time. The Victual Brothers used the Permin and the Loop near Ahrenshoop to enter the waters of the various boddens, which they used as a retreat in between their privateering. In 1395 the Hanseatic League had three ships sunk in the Permin, which accelerated the siltation of the channel and made it unnavigable.

The floodplain of the Avon, on which the city centre of Bath is built, has an altitude of about above sea level. The river, once an unnavigable series of braided streams broken up by swamps and ponds, has been managed by weirs into a single channel. Periodic flooding, which shortened the life of many buildings in the lowest part of the city, was normal until major flood control works were completed in the 1970s. The Bristol Avon Navigation, which runs the from the Kennet and Avon Canal at Hanham Lock to the Bristol Channel at Avonmouth, was constructed between 1724 and 1727, following legislation passed by Queen Anne, by a company of proprietors and the engineer John Hore of Newbury.

The original line at Bumble Hole became the Bumble Hole Branch Canal and Boshboil Arm after a collapse of the canal severed part of the loop. Having suffered from mining subsidence for years, the two-locks line was closed in March 1909 and later filled in. The line is now under a late 20th century industrial estate, and only the junctions, towpath bridges and a few yards of watered but unnavigable canal remain.Old OS map and interpretive display at Saltwells Nature Reserve, seen 11 August 2007 After repeated collapses, Lapal Tunnel was abandoned in June 1917 leaving a short stretch navigable between Selly Oak and a brick works at California until 1953, after which it was drained and filled in.

Alexander the Great founded of the city of Alexandria in April 331 BC on the site of the small fishing village of Rhacotis as the marine base for his fleet. The city was built on a narrow limestone ridge opposite to Pharos Island where the Pharos lighthouse would later stand. Forces under Alexander's command cleared the sand and silt deposits which made the port unnavigable, and Alexander's engineer Dinocrates linked the port of Alexandria and the island of Pharos with a bridge 1200 meters long and 200 meters wide, creating two harbour basins for commercial and military shipping. The northeast basin (currently the Eastern harbour) was designed for military vessels and the southwest basin (currently the main port of Alexandria) was for commercial use.

This view is too contradictory even for Plutarch, who proposes it. He therefore further hypothesizes that the Cilician pirates were joined by “men whose wealth gave them power, and whose lineage was illustrious, and who laid claim to superior intelligence ... feeling that the occupation brought them a certain reputation and distinction.” We are to assume, then, that the main motive was not plunder to acquire wealth after all, since they already had it, but was notoriety. Under the influence of this equally incredible motivation they abandoned all thought of country and duty to seize control “over the whole of our Mediterranean Sea, making it unnavigable and closed to all commerce.” They had more than a thousand ships and captured 400 cities.

By 1825 there were usually two brigades from opposite ends of the route, (Fort Vancouver in the Columbia District on the lower Columbia River and the other from York Factory on Hudson Bay), that set out in spring and passed each other in the middle of the continent. Each brigade consisted of about forty to seventy-five men and two to five specially made boats that travelled at breakneck speed (for the time). These brigades often needed help from Indians, who would help the men portage around falls and unnavigable rapids; in return, the Indians were paid with trade goods. An 1839 report cites the travel time as three months and ten days—almost 26 miles (40 km) per day on average.

Major surface streets that had once been unnavigable during many hours of the day suddenly became—and remained—usable. For example, eastern Blossom Hill Road had a typical load of 23,000 cars a day before 85 opened; as of 2004, a typical day's load was a mere 11,000 cars. (Conversely, Saratoga Avenue, which previously had been a fairly quiet road, now sees about 18,000 cars a day because it is the only interchange in or near the city of Saratoga.) As with any freeway, ambient noise in surrounding neighborhoods increased, from a steadily annoying whisper of sound day and night to a dull roar that muted backyard conversations. Property values, however, did not diminish; it is possible that the improved commute and access to the vast California freeway network improved the desirability of these neighborhoods.

Volume II., Accessed 2007-10-02 During the 1830s and 1840s, the British and French governments were at odds with Rosas' leadership of the United Provinces, modern-day Argentina, and his economic policies of protecting the local industries with high tariffs. This had led to two naval blockades, a French one in 1838, and an Anglo-French one in 1845. By the 1840s, the advent of steam-powered sailing meant that merchant ships could easily sail up rivers that had previously been impassable; as a result British and French vessels had been sailing past Buenos Aires and trading directly inland, avoiding customs duties in the process. The Rosas government tried to stop this practice by declaring the Argentine rivers unnavigable by foreign countries, barring access to Paraguayan ports in the process.

It was able to bypass the unnavigable sections of the Cataraqui and Rideau rivers and various small lakes along the waterway due to flooding techniques and the construction of 47 water transport locks.The Rideau River got its name from early French explorers who thought the waterfalls at the point where the Rideau River empties into the Ottawa River resembled a "curtain". Hence they began naming the falls and river "rideau" which is the French equivalent of the English word for curtain. During part of the winter season the Ottawa section of the canal forms the world's largest skating rink, thereby providing both a recreational venue and a transportation path to downtown for ice skaters (from Carleton University and Dow's Lake to the Rideau Centre and National Arts Centre).

The Mississippi River proved throughout the nineteenth century to be a volatile and sometimes hazardous or unnavigable road for boat traffic. Despite the best efforts of the U.S. Army Corps of Engineers, high water would swallow landings, making many smaller stops unavailable for steamboats. Likewise, low water would strand these towns far from any suitable site for boats to land (or, conversely, strand steamboats at landings in water with no outlet to a navigable channel), and increase the possibility that hazards such as snags would pierce steamboats' hulls. Floods, such as the great Flood of 1892 (during which all of Concordia Parish, Louisiana, was said to be underwater), could destroy crops that would comprise a sizable portion of the cargo transported by steamboats such as those of the Anchor Line, thus also cutting off a sizable portion of the steamboats' business.

Snowy mountains in alt= Yunnan is at the far eastern edge of the Himalayan uplift, and was pushed up in the Pleistocene, primarily in the Middle Pleistocene, although the uplift continues into the present. The eastern part of the province is a limestone plateau with karst topography and unnavigable rivers flowing through deep mountain gorges. The main surface formations of the plateau are the Lower Permian Maokou Formation, characterized by thick limestone deposits, the Lower Permian Qixia Formation, characterised by dolomitic limestones and dolomites, the Upper Permian basalts of the Ermeishan Formation (formerly Omeishan plateau basalts), and the red sandstones, mudstones, siltstones, and conglomerates of the Mesozoic-Paleogene, including the Lufeng Formation and the Lunan Group (Lumeiyi, Xiaotun, and Caijiacong formations). In this area is the noted Stone Forest or Shilin, eroded vertical pinnacles of limestone (Maokou Formation).

However, later in the year, when Emperor Zhongzong was set to make sacrifices to heaven and earth south of Chang'an, he recalled both Cui and Zheng to attend to him during the ceremony, and Cui was soon made Shangshu Zuo Cheng (尚書左丞), one of the secretaries general of the executive bureau. Sometime during these years, Cui also suggested that a new canal should be built between Lantian (藍田, near Chang'an) and Shang Prefecture (商州, roughly modern Shangluo, Shaanxi), and Emperor Zhongzong agreed, putting Cui in charge of the project. The canal was built with some tens of thousands of conscripted laborers, and somewhere between 13 and 15 laborers died during the project. Cui would eventually be recognized for the project when the older canal that the new canal replaced became unnavigable after a serious summer storm.

Shipping services on Lake Thun date back to at least 1834, when the first steamship was introduced to connect the towns of Thun and Interlaken, at each end of the lake. Interlaken is actually situated on an unnavigable section of the Aar river between Lake Brienz and Lake Thun, and initially services docked at Neuhaus, some away. In 1872, the Bödelibahn railway was constructed from Därligen, on Lake Thun, to Interlaken, and the Interlaken terminus of the Lake Brienz shipping services was moved to Därligen. However by the 1890s the railway was being extended to connect with Thun and the rest of the Swiss railway network, threatening the shipping services, and the United Steam Navigation Company for Lakes Thun and Brienz (VDG) who operated those services responded by constructing the Interlaken ship canal to allow their vessels to reach the centre of Interlaken.

Point Rosee, shown on an 1859 map as Stormy Point, is a remote headland above a rocky shoreline on the Gulf of Saint Lawrence, approximately south of L'Anse aux Meadows, which is near the northernmost point in Newfoundland and is the only confirmed Norse site in North America. Karen Milek, who completed her PhD in Archaeology at the University of Cambridge and was a member of the 2016 excavation, expressed doubt that Point Rosee was a Norse site as there are no good landing sites for their boats. The shoreline is filled with large, unnavigable rocks, and there are steep cliffs between the shoreline and the excavation site. Birgitta Wallace, who in 2015 the Canadian Archaeological Association called "the world's expert" on the Norse in North America, also expressed doubt about Point Rosee being a Norse site due to the rocky shoreline and the lack of fresh water.

Periodically, government of Tamil Nadu also takes up dredging and widening of the canal through Water Resources Department, Public Works Department (PWD). With the provisions of State-Center shared Jawaharlal Nehru National Urban Renewal Mission (JNNURM), PWD has started widening the South Buckingham Canal from Okkiyam Madu to Muttukadu for a stretch of About has been allocated under the JNNURM for integrated development of waterways and macro drainages like Buckingham canal, Otteri Nullah, Virugambakkam – Arumbakkam drain, Cooum and Adyar river. Despite of the development, the central section of the canal running through the most congested areas of Chennai, a length of will remain unnavigable due to severe encroachments and construction of the Chennai Mass Rapid Transport System. On 22 January 2010, Government of Tamil Nadu has reconstituted the Adayar Poonga Trust as Chennai River Restoration Trust for restoration of Chennai rivers (Adayar river, Cooum river) including the Buckingham Canal.

The river travels far south to Ed Debba before bending steeply to the north-east up to Abu Hamed, where it pivots once more to the south and winds on past Khartoum. The section of the river from Merowe to Abu Hamed is made unnavigable by continuous cataracts, and the ground along its banks is unsuitable for railroads. These conditions did not render the approach impossible, only difficult, dangerous, and slow. Kitchener sought an alternative route, and settled on one widely thought to be infeasible: he determined to build a railway across the vast, dry, and scorching Nubian Desert that would connect Wady Halfa to Abu Hamed, a small town then under Mahdist control. Premier engineers in Britain deemed the railroad an impossibility for several reasons, foremost of which being the speculated lack of available water sources along 120 miles of the proposed 230 mile line.Simner 2017 Ch. 7.

The barony is thus described in the Parliamentary Gazetteer of 1846: :It includes the district of the Rosses in the north, and 12 inhabited islands, besides islets and insulated rocks, off the west coast. The estuaries of the Guidore and the Guibarra, the bays of Dungloe and Tyrenagh, and numerous unnavigable sandy marine inlets, cut its seaboard into a constant and intricate series of variously outlined peninsulae. A great undulating plain or champaign territory of granite constitutes its western district, and exhibits an irksome and almost uniform surface of dark peat, dotted with loughlets or ponds, and slightly variegated with patches of tillage around the cabins. Crovehy, whose summit has an altitude of 1,033 feet above sea-level, is the highest ground in this wild and dreary tract, and the small and utterly sequestered village of Dunglow, is almost the only apology for a town.

Okanogan coming downstream on the Okanogan River, circa 1910 Prior to the construction of dams, open navigability was never established throughout the Columbia. This was an important difference from the Mississippi-Ohio River system, which in the right season, and with a canal around the Falls of the Ohio, was navigable from New Orleans to Pittsburgh, an enormous distance. By contrast, no steamboat could ever ascend or descend the entire route of the Columbia, although the nature of the river was that even far inland, such as at Arrow and Kootenay Lakes, vast areas remained navigable, but separated by rapids and shoals from the rest of the river. The rapids and shoals separating the Wenatchee Reach from the lower Columbia were practically unnavigable, although Captain William Gray did try to establish a steamboat route up the river by taking City of Ellensburg up through Priest and Rock Islands Rapids, with the aid of a cable anchored to the bank and then wrapped around the capstan.

Georg Leo Graf von Caprivi de Caprera de Montecuccoli, who gave his name to the Caprivi Strip Caprivi was named after German Chancellor Leo von Caprivi (in office 1890–1894), who negotiated the acquisition of the land in an 1890 exchange with the United Kingdom. Caprivi arranged for the Caprivi strip to be annexed to German South West Africa in order to give Germany access to the Zambezi River and a route to Africa's east coast, where the colony of German East Africa (now part of Tanzania) was situated. The transfer of territory was a part of the Heligoland-Zanzibar Treaty of 1890, in which Germany gave up its interest in Zanzibar in return for the Caprivi Strip and the island of Heligoland in the North Sea. The river later proved unnavigable and inaccessible to the Indian Ocean due to the Victoria Falls, a fact that was possibly known to the British side already during the negotiations.

Navigation to Sheffield was made possible by the construction of weirs, locks and canal cuttings to avoid circuitous and unnavigable sections of the Don downstream of Tinsley, and then by a canal from Tinsley to Sheffield. The first serious attempts at improvements were authorised by an Act of Parliament obtained in 1726 by Sheffield's Company of Cutlers to make the river navigable from Holmstile in Doncaster to Tinsley, on the edge of Sheffield, and another obtained by the Corporation of Doncaster in 1727 to improve the river below Holmstile, as far as Wilsick House in Barnby Dun. An Act of 1733 created "The Company of the Proprietors of the Navigation of the River Don", and authorised further cuts above Rotherham, while a further Bill of 1740 sought powers to improve the river from Barnby Dun to Fishlake Ferry, to avoid the shallows at Stainforth and Bramwith. The river was navigable to Rotherham in 1740, and to Tinsley by 1751.

The original wooden bridge at the site was the first bridge in the current District of Columbia, being constructed in 1788 by the City of Georgetown two years before it was incorporated into the District. The bridge reportedly collapsed during a severe storm, leading to a legend that the ghosts of a stagecoach driver and his horses that drowned in the collapse could be seen thereafter, still attempting to cross the bridge. It was replaced by a heavy wooden drawbridge in 1800, as Rock Creek was at that time wide and deep enough that sailing ships needed to transit the bridge, although the creek became unnavigable by the 1830s due to silt from upstream construction and agricultural uses, as well as construction of a quay obstructing the mouth of the creek. A covered wooden bridge replaced the drawbridge in 1839, followed by a steel-truss bridge in 1871, which was closed in 1925 because it had become structurally unsound.

A "Closed" notice on the bottom lock following the 2008 breach The British Waterways Board published a report in January 1964, called The Future of the Waterways, in which they suggested that the case for retention of the Stourbridge Canal was borderline, but that if there was practical support from those interested in its survival, then that might alter the balance. With the 16 locks unnavigable, the Staffordshire and Worcestershire Canal Society (S&WCS;) proposed a restoration programme to the newly formed British Waterways Board in late 1963, where the navvying would be done by volunteers under the direction of British Waterways, who would also provide the materials. The Transport Act 1962 had paved the way for canals to be considered for their amenity value, rather than as purely commercial enterprises, and against this background, the S&WCS; proposal was accepted as a test case by the Board, and restoration began in 1964. Work of the canal was undertaken by weekend working parties, including members of the S&WCS;, the Dudley Tunnel Society and the Coventry Canal Society.

The Madeira river rises more than 15 m (50 ft) during the rainy season, and ocean vessels may ascend it to the Falls of San Antonio, near Porto Velho, Brazil, above its mouth; but in the dry months, from June to November, it is only navigable for the same distance for craft drawing about of water. The Madeira-Mamoré Railroad runs in a loop around the unnavigable section to Guajará-Mirim on the Mamoré River, but is not functional, limiting shipping from the Atlantic at Porto Velho. Today, it is also one of the Amazon Basin's most active waterways, and helps export close to four million tons of grains, which are loaded onto barges in Porto Velho, where both Cargill and Amaggi have loading facilities, and then shipped down the Madeira to the ports of Itacoatiara, near the mouth of the Madeira, just upstream on the left bank of the Amazon, or further down the Amazon, to the port of Santarem, at the mouth of the Tapajos River. From these two ports, Panamax type ships then export the grains - mainly soy and corn - to Europe and Asia.

Wilhelmina Top (Puncak Trikora), 1913 from south by P. F. Hubrecht On the summit of Wilhelminatop, first ascent 21 February 1913. By Alphons Franssen Herderschee The navigable Noord River made the mountain more accessible than the other snow-covered peaks of Dutch New Guinea and the Dutch organized a series of scientific expeditions in the early 20th century to reach the equatorial eternal snow and climb the mountain. The leader of the first two expeditions was the diplomat and amateur biologist H.A. Lorentz. Each expedition was accompanied by soldiers, porters and dayaks, who were employed for their expertise with boat journeys. In July 1907, the first expedition established Camp Alkmaar near where the Noord River, since 1910 known as the Lorentz River, became unnavigable (), but was unsuccessful in penetrating to the highest mountain range. The Second South New Guinea Expedition also used Camp Alkmaar, from where it left on October 9, 1909. A group of nine, including Lorentz and Jan Willem van Nouhuys, were the first to reach the eternal snow of New Guinea at a height of on November 8, 1909. From the ridge they observed a large lake to the north, which Lorentz named Lake Habbema (), after a member of the expedition.