Rio Blanco (Colorado)

Rio Blanco[1]
Basin
Main source Conejos County, Colorado
37°18′43″N 106°40′06″W / 37.31194°N 106.66833°W / 37.31194; -106.66833 (Primary source of Rio Blanco[1])
River mouth Confluence with San Juan
6,608 ft (2,014 m)
37°07′16″N 107°02′37″W / 37.12111°N 107.04361°W / 37.12111; -107.04361 (Mouth of Rio Blanco)Coordinates: 37°07′16″N 107°02′37″W / 37.12111°N 107.04361°W / 37.12111; -107.04361 (Mouth of Rio Blanco)
Progression San Juan—Colorado

Rio Blanco is a tributary of the San Juan River in southern Colorado in the United States. The stream originates in the San Juan Mountains and flows for 30 miles through the San Juan National Forest and private lands to its confluence with the San Juan River in Archuleta County, Colorado. Colorado classifies the Rio Blanco as an Aquatic Life Coldwater Class 1/Recreation Class 1 waterway supporting water supply and agricultural uses.[2] The river also features native cutthroat trout and introduced rainbow trout fishing.[3][4]

Restoration project

The San Juan-Chama Diversion Project, which was started in 1971, eventually led to reduced water flow and a loss of aquatic habitat in the Rio Blanco. In 1998, Colorado included a 12-mile reach of the lower Rio Blanco on its list of impaired waters for failure to support its aquatic life due to sediment. A project to restore the stream channel to match the altered flow regime, resulted in the river's physical and biological function and water quality being improved. In 2008, Colorado removed the Rio Blanco, including the 12-miles of the lower reach, from the state’s list of impaired waters.[2]

Fishing

Parts of the river range from ten to twenty feet wide and you can fish on the side creeks and Rito Blanco. Most of the trout are in the 7-12" range.[5] There are three miles of the river that were transformed by hydrologist Dave Rosgen, from being wide and shallow to a deep flow that now supports a variety of trout. Rosgen's plan included placing boulders and old trees on the river banks to direct the waters toward a channel that would be more defined. He also constructed a tube to divert away the gravel and sand, which allows water to flow through, but the sediment is routed to a holding area which is regularly emptied and used elsewhere. Cost of the renovation was about $1 million. The three mile stretch may be fished by guests of El Rancho Pinoso, a privately owned ranch near the river.[3][6]

See also

References

  1. 1 2 "Rio Blanco". Geographic Names Information System. United States Geological Survey. Retrieved 2013-05-16.
  2. 1 2 "Colorado: Lower Rio Blanco Watershed". US Environmental Protection Agency. Retrieved October 15, 2014.
  3. 1 2 Chris Santella (December 23, 2010). "The Man Who Brought Trout to a Valley of Gravel". The New York Times. Retrieved October 15, 2014.
  4. ↑ Scott Taylor (April 30, 2010). "Fishing the Pagosa Springs Area (Pagosa Springs - Freshwater Fishing Report)". Southwest Colorado: Cyber Angler. Retrieved October 15, 2014. Rio Blanco: This is probably the most under fished river in our area, this river is a true adventure every time.
  5. ↑ "Colorado Rivers Information (Blanco)". Colorado Mountain Club.
  6. ↑ "Fly Fishing". El Rancho Pinoso.
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