Interstate 280 Repair Pipe System and Backfill Sinkhole
3 Documents in Project
Summary
SCH Number
2013102038
Lead Agency
California Department of Transportation, District 6
Document Title
Interstate 280 Repair Pipe System and Backfill Sinkhole
Document Type
MND - Mitigated Negative Declaration
Received
Present Land Use
Grassland/urban Open space area
Document Description
Caltrans proposes to replace a drainage pipe west of I-280 at post mile 9.4. The 60-inch corrugated metal pipe, which has failed along a portion of its length, has created a sinkhole sufficiently large enough to begin impacting an existing maintenance access road and supporting fill slope of I-280. The sinkhole continues to pipe debris and material during rain events into Lower Crystal Springs Reservoir, a San Francisco Public Utility Commission drinking water source. The project will replace 850 feet of pipe from an existing riser at the midpoint of the drainage system to its outfall. The pipe accepts drainage from two 24-inch lateral lines coming from I-280; one line at the drainage system midpoint; and the second a line near the outfall.
Contact Information
Name
Kelly J. Hobbs
Agency Name
California Department of Transportation, District 6
Contact Types
Lead/Public Agency
Phone
Location
Coordinates
Cities
Belmont, San Mateo
Counties
San Mateo
Waterways
Lower Crystal Springs Reservoir
Notice of Completion
State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Parks and Recreation, California Native American Heritage Commission (NAHC), California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), Department of Water Resources, Resources Agency, State Water Resources Control Board, Divison of Financial Assistance
Project Issues
Biological Resources
Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.