DS Canal Flume Replacement Project

DS Canal Flume Replacement Project

The Nevada Irrigation District (District) proposes to replace eight existing elevated wood-supported metal flumes along the District DS Canal with steel supported, elevated 72-inch pipe flumes, and to replace the DS Canal crossing at Gracie Road. The existing flumes connect the DS Canal, where it spans natural drainages, to provide gravity flow along the course of the canal. Changes to the DS Canal itself will be limited to the areas immediately adjacent to the upstream and downstream ends of the flumes. At those locations, short stretches of canal maybe relocated and the flume entry and exit points will be lined in order to avoid erosion. Other than the aforementioned mentioned entry and exit points, this project does not include lining or otherwise changing any other portions of the DS Canal. Work on this part of the project will be limited to the areas adjoining the eight flumes. The flumes proposed for replacement are generally located between the DS Canal's intersections with Banner Mountain Trail (to the east) and Banner Lava Cap Road (to the west). Flumes #13 and 19 are proposed to be replaced in their current alignment, requiring a temporary canal outage while construction takes place. Construction of Flumes 13 and 19 would occur during the non-irrigation season from October 15 to April 15. Flumes #14, 15,16,17,18, and 23 are currently scheduled to be constructed parallel to the existing facilities, on the downslope side, and will require a brief canal outage while they are being connected. The DS Canal passes under Gracie Road (between Flumes 17 and 18) through existing twin culverts. NID proposes to replace these culverts within the same general alignment, to be sized for projected flows under the District's master plan. Some trees may need to be removed during this work.

Grass Valley

Nevada

Cal Fire, California Department of Fish and Wildlife, North Central Region 2 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 3 (DOT), California Highway Patrol, California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB), Department of Water Resources, Resources Agency, Resources, Recycling and Recovery, State Water Resources Control Board, Division of Loans and Grants, State Water Resources Control Board, Division of Water Rights, California Native American Heritage Commission (NAHC)

California Native American Heritage Commission (NAHC)

Water Facilities

Aesthetics, Cumulative Effects, Growth Inducement, Hydrology/Water Quality, Noise, Transportation, Vegetation, Wetland/Riparian, Wildlife