California Gulch NRDAR Arkansas River In-Stream Habitat Restoration
Dates
Start Date
2010
End Date
2014
Summary
Background information. Settlement funds from the California Gulch Superfund site have been used to improve instream aquatic habitat and increase brown trout (Salmo trutta) populations in the Arkansas River. The upper Arkansas River Basin is a high-elevation mountain river that supports trout populations. Historically characterized by a relatively narrow channel with fast moving water, recent degradation of the upper Arkansas River due to historic land-use practices have contributed to an altered river channel and a decrease in important habitat features for trout, such as deep-water pools. This restoration project was designed to address three major issues: bank erosion, altered river channel morphology, and degraded instream trout [...]
Summary
Background information. Settlement funds from the California Gulch Superfund site have been used to improve instream aquatic habitat and increase brown trout
(Salmo trutta) populations in the Arkansas River. The upper Arkansas River Basin is a high-elevation mountain river that supports trout populations. Historically characterized by a relatively narrow channel with fast moving water, recent degradation of the upper Arkansas River due to historic land-use practices have contributed to an altered river channel and a decrease in important habitat features for trout, such as deep-water pools. This restoration project was designed to address three major issues: bank erosion, altered river channel morphology, and degraded instream trout habitat. Led by the U.S. Fish and Wildlife Service, who partnered with the Colorado Parks and Wildlife Commission, the Lake County Conservation District, and Colorado Mountain College, restoration has taken place on both public and private land along an 11-mile reach of the Arkansas River and in the Lake Fork Watershed. Project treatments included modification of the river channel morphology, reduction of channel width, excavation of instream pools, elevation of the river-bottom, construction of riparian benches to extend the width of important riparian zones, in-channel placement of boulders and other debris, and planting and reseeding riparian vegetation along the stream banks. Woody debris and boulders were added to stabilize streambanks and reduce erosion by slowing water flows at the water-bank interface. Livestock fencing was installed and grazing management plans developed to promote rotational grazing near the river corridor. This project is ongoing, but has already been deemed an enormous success. As a result of this project and other restoration efforts in the area, the Colorado Parks and Wildlife Commission announced in 2014 that the Upper Arkansas River was added to the Statewide list of Gold Medal Trout Waters, a designation given only to the top locations in the State for trout fishing.
Background information on the Arkansas River instream habitat restoration was obtained from Laura Archuleta, U.S. Fish and Wildlife Service, Greg Brunjak, Lake County Conservation District, and Tracy Kittell, Colorado Parks and Wildlife, written commun., 2015; and from California Gulch Superfund site Natural Resource Damage Assessment and Restoration case documents at
http://www.cerc.usgs.gov/orda_docs/CaseDetails?ID=37.
Economic impacts. The Arkansas River Instream Habitat Restoration project began in 2010 and continued into 2014, and had a total cost of more than $3,244,000 during this period (2014 dollars). Approximately 54 percent of the funds for this project was spent locally, which supported an estimated total of 25.0 job-years; $1,268,000 in labor income; $1,667,000 in value added; and $3,261,000 in economic output within the local economy surrounding the project site. Expanding to include the effects of both local and nonlocal expenditures, the Arkansas River Instream Habitat Restoration project supported an estimated total of 49.5 job-years; $3,119,000 in labor income; $4,600,000 in value added; and $9,060,000 in economic output to the national economy.