County File #TP12-0017, Norris Canyon Estates San Catanio Creek Tributary Stabilization Project

3 Documents in Project


SCH Number
Lead Agency
Contra Costa County
Document Title
County File #TP12-0017, Norris Canyon Estates San Catanio Creek Tributary Stabilization Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Open Space / Planned Unit Development Zoning District / GPD of Single-Family Low Density and Open Space
Document Description
The applicant seeks approval of a Storm Drain Remediation permit (DP11-070) and Tree permit (County File #TP12-0017) in order to construct improvements to stabilize two (2) unnamed tributaries of San Catanio Creek that drain into an existing detention basin built as part of the Norris Canyon Estates project on the creek. The work is requested upstream of the detention basin to return the tributaries to historic elevations while stabilizing creek banks and preventing future erosion of the drainages. Currently, the unnamed tributaries have experienced up to 20 feet of erosion, with eroded soil flowing downstream to the existing detention basin and beyond. It is hoped that by conducting the work described below that the detention basin will operate as intended. The Tree Permit is necessary because 85 code-protected trees within and near the tributary channels are proposed to be removed as part of the creek remediation work.

Contact Information

Richard Norris
Agency Name
Contra Costa County Dept. of Cons. and Dev.
Contact Types
Lead/Public Agency


San Ramon
Contra Costa
Cross Streets
The area encircled by Ashbourne Circle
Total Acres
State Highways
Hwy 680

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Department of Conservation (DOC), California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 4 (DOT), California Native American Heritage Commission (NAHC), California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), Department of Water Resources, Office of Emergency Services, California, Resources Agency, State Water Resources Control Board, Division of Water Rights
Development Types
Other (Stormwater improvements for an existing residential dev)
Local Actions
PW & Tree PRMT
Project Issues
Aesthetics, Biological Resources, Cumulative Effects, Drainage/Absorption, Geology/Soils, Hydrology/Water Quality, Noise, Wetland/Riparian

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 or via phone at (916) 445-0613.

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