WSP06927 - Laserfiche WebLink

Home Browse Search

'~---~- ,..---.,'1'>'r--':=J beaches by means of dredging, or periodic flooding, and the sand bar above Lee's Ferry should be moved down stream. 6. Add sediment to Colorado River tributaries below Glen Canyon Dam as means of putting more sediment into the river for beach augmentation. 7. Beach stabilization by means of natural material, i.e., plant & rocks, introduced material, i.e., exotic plants, construction materials, beach augmentation, and beach construction. 8. Sediment piling up as the Colorado River flows into Lake Mead should be removed so power boats could travel up stream. 9. Study ways to conserve the sediment that does flow down the river. FISH HABITAT Endangered Fishes 1. This element would focus on the presumed needs of the humpback chub. Its primary purpose is the protection of the LCR population of humpback chub. * Mid-April through mid-June: The dam would be operated to deliver enough water to maintain high-steady flows in the magnitude of 30,000 cfs. * During the remainder of the year, lower, but steady flows would be delivered downstream. * Humpback Chub Recovery Plan objectives should be pursued. 2. Stocking of humpback chub would be considered. 3. warming mainstem water to 62 F. during humpback chub spawning season (May to June - but this time length may differ if chub spawn earlier or later). 4. Localized protection of important or unique backwaters used by native fish as larval hatcheries (warming of water, protection from draining due to low flows, food augmentation if needed, removal of competing exotic fishes, backwater stabilization, augmentation, construction, etc). 5. Protect the humpback chub by limiting public access during spawning season, and close the river to boaters, hikers, and fishing if necessary. 14