Grassland Bypass Project
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- Long-term Drainage Management Plan: 2010 update, 2.21 MB*, PDF (PDF Info)
- Amendments to The Water Quality Control Plan for the Sacramento River and San Joaquin River Basins To Address Selenium Control In the San Joaquin River Basin
- Final Staff Report, 2010, 367 KB, PDF (PDF Info),
- Resolution No. R5-2010-0046, Adopted 27 May 2010, 389 KB, PDF (PDF Info),
- Late Revisions, 39 KB, PDF (PDF Info),
- Response to Comments, 1.49 MB*, PDF (PDF Info),
- Public Comments:
- Reclamation District (received 27 May 2010, so not included in written Response to Comments), 2.94 MB*, PDF (PDF Info),
- Grassland Basin Drainers, 437 KB, PDF (PDF Info)
- San Joaquin River Group, 29 KB, PDF (PDF Info)
- Central Valley Sallinity Coalition, 136 KB, PDF (PDF Info)
- California Water Impact Network et. al (Coalition), 999 KB, PDF (PDF Info)
- USEPA, 351 KB, PDF (PDF Info)
- USFWS, 331 KB, PDF (PDF Info)
- Draft Staff Report, 389 KB, PDF (PDF Info)
- Notice of Public Hearing, 20 KB, PDF (PDF Info)
- Environmental documents and Record of Decision for the 2010 Use Agreement between San Luis & Delta-Mendota Water Authority and the US Bureau of Reclamation for us of the San Luis Drain
- 2010-2019 Use Agreement, 6.79 MB*, PDF (PDF Info)
- Long-term Drainage Management Plan: 2009 update, 1.57 MB*, PDF (PDF Info)
- Grassland Bypass Project Storm Event Plan, 790 KB, PDF (PDF Info)
- Scoping meeting notice, 58 KB, PDF (PDF Info) (Comments due 11-26-08)
- San Luis & Delta-Mendota Water Authority and U.S. Department of the Interior Bureau of Reclamation, Grassland Bypass Project (Phase II)
- Selenium Control Program
- Grassland Bypass Project data can accessed through the Surface Water Ambient Monitoring Program webpage for the San Joaquin River Basin
- Grassland Bypass Project monthly, quarterly and annual reports are available here
Grassland Bypass Project (map and data):
Prior to October 1996, subsurface agricultural drainage water (tile drainage) and surface runoff (irrigation tail water) from the Grassland Watershed was discharged to the San Joaquin River through Salt Slough and/or Mud Slough (north). These two sloughs are tributary to the San Joaquin River and serve as the primary drainage outlets for the Grassland Watershed.
After October 1996, all subsurface agricultural drainage from a 97,000 acre area within the Grassland Watershed known as the Drainage Project Area, was rerouted into the Grassland Bypass whih discharges into the final 28 miles of the San Luis Drain. The consolidtaed subsurface drainage is then released into the final nine miles of Mud Slough (north) for eventual discharge into the San Joaquin River. Consolidating the subsurface drainage removes the primary source of selenium from approximately 90 miles of canals within the Grassland Watershed which can supply water for wetland habitat, and also removes this drainage from Salt Slough. Reducing selneium in these water bodies is a primary goal of the project, since elevated concentrations of selenium have been documented to be hazardous to waterfowl. Subsurface drainage from areas outside of the 97,000 acre area served by the Grassland Bypass Project continues to flow to Salt Slough and Mud Slough (north).
For more detailed information and access to annual reports, go to U.S. Bureau of Reclamation Grassland Bypass Project Homepage.
For more information please contact:
- Rudy Schnagl at (916) 464-4701 or email@example.com.
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