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https://hdl.handle.net/11681/39342| Title: | Supplemental Environmental Assessment/Initial Study for Marysville Ring Levee Project, Phase 2A South, Phase 2C, Yuba River Basin, Yuba County, California |
| Authors: | United States. Army. Corps of Engineers. Sacramento District California. Central Valley Flood Protection Board |
| Keywords: | Marysville (Calif.) Yuba River (Calif.) Flood control Levees Environmental management Environmental protection |
| Publisher: | United States. Army. Corps of Engineers. Sacramento District. |
| Abstract: | This Supplemental Environmental Assessment (SEA)/Initial Study (IS), is being prepared to assess the potential direct, indirect and cumulative environmental effects associated with the levee design refinements and address the technical issues related to the seepage and stability of the MRL. This SEA/IS discusses Phase 2A-South and 2C modifications to the Marysville Ring Levee EA/IS (USACE, 2010) Alternative 2. All phases of the MRL Project are documenting changes in design, costs, benefits and environmental effects through Design Documentation Reports (DDR) and, where necessary, supplemental environmental documents. This SEA/IS analyzes, in detail, the following alternatives: - Alternative 1. As construction has not yet commenced in the Phase 2A South and 2 C locations, the No Action Alternative remains a possible scenario for that area. Phase 1 was constructed in 2011 and portions of Phase 4 were constructed in 2016 and 2017. Phase 2A North is scheduled to begin construction in late spring 2018. No MRL actions would occur in the No Action. The safety risks would remain in this section of the levee. - Alternative 2. Under this action alternative, proposed changes to the 2010 design will be implemented. The footprint of the levee would not change as a result of the improvements and implementation of the modifications would decrease flood risk to the city of Marysville to about 0.4 percent in any given year. Modifications included in the Alternative 2 are discussed in detail in Section 2.3. |
| Description: | Supplemental Environmental Assessment/Initial Study |
| Rights: | Approved for Public Release; Distribution is Unlimited |
| URI: | https://hdl.handle.net/11681/39342 |
| Appears in Collections: | Environmental Documents |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Marysville Final SEA_IS for 2AS_and_2C 2018.pdf | 12.19 MB | Adobe PDF |  View/Open |