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The Clyde River is a tributary of Lake Memphremagog, over 33.5 miles (54 km) long, in northern Vermont in the United States. It is the easternmost of the four major rivers in Orleans County. It is the most powerful of the four within Orleans County, powering several turbines at damsites.[2] It is part of the Northern Forest Canoe Trail.

Clyde River
Location
CountryUnited States
StateVermont
RegionNortheast Kingdom
CityNewport, Vermont
Physical characteristics
SourceSpectacle Pond[1]
Island Pond
  locationEssex County, Vermont, United States
  coordinates44°48′2″N 71°51′1″W
  elevation1,275 ft (389 m)
MouthLake Memphremagog
  location
Newport (city), Vermont, Orleans County, Vermont, United States
  coordinates
44°56′39″N 72°12′16″W
  elevation
682 ft (208 m)
Length33.5 mi (53.9 km)
Basin size146 sq mi (380 km2)
Discharge 
  locationNewport, Vermont
Basin features
Tributaries 
  left(from the mouth) Toad Pound discharge, Buck Brook, Mad Brook, Cold Brook, Payne Brook.
  right(from the mouth) Stumpf Brook, Echo Lake discharge, Lang Brook, Mud Ponds, Pherrins River, Vermont.

It was named by one of the early surveyors[3] from his partiality to a river of the same name in Scotland.

The Route 105/114 junction to Clyde Road section of Clyde River in Vermont is 21 miles (34 km) long and is rated by American Whitewater as a class I-III section.[4]


Geography


It drains the water from about 146 square miles (378 km2). With the exception of three miles (5 km) of rapids near its mouth, this is a very sluggish stream, passing through in its course, several natural ponds of considerable size. Even during spring high water, there is barely a perceptible current.[5]


Course


The river has its source in Spectacle Pond (length: 1.4 kilometres or 0.87 miles; altitude: 357 metres or 1,171 feet) in Brighton. The Southern part of Spectacle Pond is part of Brighton State Park. Spectacle Pond is actually a kettle. It is only 8 to 10 feet (2.4 to 3.0 m) deep with a thick bottom of muck.[6]

From the mouth of Spectacle Pond, the Clyde river flows on 53.9 kilometres (33.5 mi) as follows:

Higher course of the river (segment of 4.9 kilometres (3.0 mi))

Pherrins River[9] which is the main tributary of Clyde River, empties into the Clyde River from the north at 0.9 kilometres (0.56 mi) below the outlet, frequently rises quite suddenly, swelling the waters of the latter so as to reverse its current and cause it to back up into Island Pond with great force for ten hours or more, until the pond is full, or the water subsides below, when it will again change and rush out.[10]

Intermediary course of the river (segment of 26.6 kilometres (16.5 mi))

From the mouth of Pherrins River, the Clyde River flow as follow:

Lower course of the river (segment of 22.4 kilometres (13.9 mi))


Charleston


The Clyde River is the largest in Charleston. It runs nearly through the center of the town. Some falls of importance are found on the stream, especially the Great Falls in the western part of the town, where the descent is more than 100 feet (30 m) in 66 feet (20 m); but its current is generally slow.


Derby


The Clyde River forms the principal water-course, flowing through the town from east to west.[10]

After exiting from Clyde Pond #1, it proceeds westward. It empties into Lake Salem from the south. It exits the northwest corner of this lake. It is then joined by an unnamed brook from Derby Pond from the north. It then empties into Clyde Pond #2 from the northeast. It exits this Pond west and into south Lake Memphremagog from the north. The mouth is just east of where US 5/Vermont 105 crosses Lake Memphremagog.


Natural history


Beavers populate the countryside and sometimes undercut the streamside silver maple, toppling them into the water and creating logjams.[5]

The river winds through farm country, with silver maple and alder dominating the shoreline. Northern white cedar, an occasional willow, and a variety of shrubs line the 40-foot (12 m) wide waterway, and vegetation dips right into the water.[citation needed]


Geology


The river is in the Nulhegan Basin of northeastern Vermont.[12]


History



Toponymy


The term "Clyde" is a popular first name with English origin. This term is also used as surname.

This toponym was officialized on October 29, 1980 at Geographic Names Information System (GNIS) of US federal government.[13]


Dams


In the early 19th century a mill dam constructed at Arnolds Falls. In 1883 a dam was constructed at the outlet to Lake Memphremagog. In 1918 the Newport Dam (Clyde Pond #2) was constructed. This dam was also known as Prouty Dam (after Governor Prouty). It was 713 feet (217 m) long. This was also known as the Clyde Pond dam.

The Echo Lake dam is not used for hydroelectric power. Construction was completed in 1922. It has a normal surface area of 530 acres (2.1 km2). It is owned by Great Bay Hydro Corporation. The dam is concrete. The core is homogeneous concrete. The foundation is rock. The height is 16 by 120 feet (4.9 by 36.6 m). Maximum discharge is 693 cubic feet (19.6 m3) per second. Its capacity is 5,000 acre-feet (6,200,000 m3). Normal storage is 3,180 acre-feet (3,920,000 m3). It drains an area of 24 square miles (62 km2).[14]

In 1928 a dam was constructed at West Charleston. In 1929 a dam was built at Pensioner's Pond.

In 1957 #11 Dam was constructed. It was located 1,000 feet (305 m) below the current hydro generation station off Clyde Street. In 1994 the #11 Dam was breached. In 1996 the #11 Dam was removed. In 2007 a fish (salmon) passage was built at the Newport Dam. Salmon fishing in Lake Memphremagog and the Clyde nearly stopped when the dam was constructed. It has improved since the dam's removal. The State of Vermont stocks the river with 30,000 salmon annually. 6,000 perish immediately from predators. Of those that make the journey to Lake Memphremagog, 18,000 return to spawn. The remainder assumed to be caught by fishermen.[15]


Lists



Tributaries


The following dams are on tributaries (watershed) that feed into the Clyde, and not the Clyde itself:

Lake Seymour is on a tributary which drains into Echo Lake, which in turn drains into the Clyde. It is not used for hydroelectric power. Construction of the original dam was completed in 1928. The lake has a normal surface area of 2.8 square miles (7.3 km2). It is owned by Great Bay Hydro Corporation. This dam is stone, and concrete. The core is concrete. The foundation is soil. Its height is 7 feet (2.1 m) by 68 feet (21 m) long. Maximum discharge is 85 cubic feet (2.4 m3) per second. The capacity is 5,200 acre-feet (6,400,000 m3). Normal storage is 3,500 acre-feet (4,300,000 m3). It drains an area of 20.1875 square miles (52.285 km2).[14]


List of cities and towns


In upstream order:


See also


Media related to Category:Clyde River at Wikimedia Commons

Map all coordinates using: OpenStreetMap 
Download coordinates as: KML

Footnotes


  1. Sometimes called "Pitkin's Pond
  2. The Passumpsic River is also powerful, but is mostly outside of Orleans County
  3. James Whitelaw, eventual Surveyor-General of Vermont
  4. "AMC NY-NoJ :: River Information". Archived from the original on 2009-01-03. Retrieved 2009-01-27.
  5. Trails
  6. Johnson, Charles W. (1984). The Nature of Vermont. University Press of New England.
  7. The origin of Island Pond name is derivative from waterbody "Island Pond"
  8. In the 19th century, this waterbody was named "Knowles Pond"
  9. Was once called Ferrin's River
  10. Gazetteer of Lamoille and Orleans Counties, VT.; 1883-1884, Compiled and Published by Hamilton Child; May 1887
  11. There are two Clyde Ponds. This one is the original. The one in Derby near the city of Newport was formed by a dam and is referred to here as #2. Generally when "Clyde Pond" is referenced, it is the second one, which is larger,
  12. "GLACIAL GEOLOGY OF THE NULHEGAN BASIN AREA, NORTHEASTERN VERMONT, USA". gsa.confex.com. Retrieved 2018-03-29.
  13. Geographic Names Information System (GNIS) - Toponym: "Clyde River"
  14. findlakes.com http://findlakes.com/seymour_lake_vermont~vt00023.htm. Retrieved November 28, 2008. {{cite web}}: Missing or empty |title= (help)
  15. Lefebvre, Paul (December 29, 2015). "Salmon fishing on the Clyde appears to be improving". The Chronicle. Barton, Vermont. pp. 1A, 18A.





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