River gets repairs in Minturn, Edwards
September 26, 2008
MINTURN, Colorado ” Restoration work will begin Tuesday on a warm, wide and shallow stretch of the Eagle River in Edwards, an area notoriously unwelcoming to fish.
So, you can expect to see construction crews and heavy equipment actually in the river, moving rocks and dirt.
Restoration has already started on a stretch of the Eagle River running through Minturn that was badly damaged by early development in town.
Back in the 1800s, trees used to line the flat section of river between the Edwards Spur Road Bridge and the Hillcrest Drive bridge, which was a perfect place for grazing. Years of agriculture and development weakened the river banks and slowly allowed silt to fall in the river, smothering insects and providing a breeding ground for the trout-killing whirling disease.
The shallowness, along with the absence of trees on the river’s edge, leads to high water temperatures and low amounts of dissolved oxygen, which aren’t good for trout.
The Eagle River Watershed Council, a nonprofit river advocacy group, raised about $1.5 million to make this area deeper, cooler and faster running, as it was more than 100 years ago.
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So called “bars” of gravel, cobbles and boulders will be installed on alternating sides of the river bank, which tightens the width and forces water to flow more heavily on the opposite side, creating deeper stretches of water and decreasing the temperature.
This creates a natural looking “meandering effect,” says to Julie Ash, the water resource engineer with Walsh Environmental who is the project manager.
Sediment would then more easily wash downstream, especially when water levels are low. Insects won’t be smothered, whirling disease won’t thrive, and trout will have better places to live and spawn.
This spring, a lot of trees ” such as willows and cottonwood ” will be planted. Trees provide shade, which cools the water and helps the fish. Having trees nearby also helps jump-start the food chain by allowing leaves and logs to fall in the water. The leaves feed the little fish, the little fish feed the big fish, and insects thrive in decomposing logs, which also makes the fish happy, Ash says.
This area will certainly look better after the restoration, planners say. It looks especially bad when compared to the sections of river both upstream and downstream, which are actually quite healthy.
Crews should be out of the river by Nov. 15, said Melissa Macdonald, project administrator for the Watershed Council
In Minturn, development had a similar effect on the river as it did in Edwards.
As homes and businesses were built near the water’s edge decades ago, the river was reshaped and deformed, creating high and unstable river banks that couldn’t hold plant roots.
As the river banks eroded, wildlife habitat was destroyed, and fish moved away, said Dave Blauch, the project manager and a senior ecologist with Natural Resource Consultants.
The restoration area is roughly from the Interstate 70 westbound bridge to the Bellum Bridge in Minturn, about 1.6 miles. The goal is to make the river here more natural looking, as it did before development.
Restoration will involve strategically placing boulders and cobbles in the river, which will create a variety of homes for fish. There will be some fast moving shallow areas, and some slow moving pools.
On the river bank, workers will begin planting cottonwoods, willow, spruce and a variety of shrubs and grasses. In some areas, workers will extend the river bank.
Restoration work will finish in mid-October. You’ll likely see a lot of heavy construction equipment in the river, and sometimes, you’ll see cloudy water ” an unavoidable side effect of doing restoration work.
A similar restoration project was done on another section of the river running through the heart of Minturn a few years ago.
Staff Writer Matt Terrell can be reached at 970-748-2955 or firstname.lastname@example.org.