Orinda Watershed Culvert Replacement Project
Summary
SCH Number
2026070203
Public Agency
East Bay Municipal Utility District
(EBMUD)
Document Title
Orinda Watershed Culvert Replacement Project
Document Type
NOE - Notice of Exemption
Received
Posted
7/7/2026
Document Description
The project will replace three failed culverts located on fire service roads within Orinda Watershed lands. The project will provide a functional culvert to protect the integrity of the three fire service roads and prevent local flooding. See Attachment A for additional information.
Overview and Background
The Orinda Watershed Culvert Replacement Project is located within the East Bay Municipal District (EBMUD) Watershed Lands in Contra Costa County. The project includes replacement of three failed culverts that have been identified on critical fire roads.
Project Purpose and Objectives
The project includes three sites: Rocky Ridge Fire Road, Kaiser Creek Fire Road, and Nunes Fire Road. The purpose of the project is to provide a functional culvert at each site to protect the integrity of the fire roads, in addition to providing emergency ingress and protecting water quality and natural resources. The objective of the project is to replace the three failed culverts, retaining the original dimensions and grade.
Project Location
The project is located on EBMUD's watershed lands in Contra Costa County, see Figure 1a and Figure 1b.
Project Characteristics
The project scope of work includes the following:
• Rocky Ridge Fire Road: Replace existing 54-inch, 33 feet long, failed corrugated metal culvert with Advanced Drainage Systems (ADS) double-walled, watertight slip joint plastic pipeline, retaining established dimensions and grade.
• Kaiser Creek Fire Road: Replace existing 24-inch, 20 feet long, failed single-walled plastic culvert with ADS double-walled, watertight slip joint plastic pipeline, retaining established dimensions and grade.
• Nunes Fire Road: Replace existing 36-inch, 30 feet long, failed corrugated metal culvert with ADS double-walled, watertight slip joint plastic pipeline, retaining established dimensions and grade.
Required heavy equipment for each project site will be staged on the respective fire service road, by the construction zone.
Permits
All work will be conducted on EBMUD property, so no encroachment permits are necessary. A Lake and Streambed Alteration Agreement will be obtained from the California Department of Fish and Wildlife for each of the three culvert replacements.
Schedule
Work is scheduled to start after the nesting bird season and will be completed by October 30th. Work hours will be limited to weekdays with standard business hours of7:00 a.m.to 3:00 p.m.
EBMUD Practices and Procedures Standard construction environmental and safety practices applicable to all EBMUD construction projects have been incorporated into the project and will be implemented accordingly.
Contact Information
Name
Matthew B. Sporleder
Agency Name
East Bay Municipal Utility District
Job Title
Ranger Supervisor
Contact Types
Lead/Public Agency / Project Applicant / Parties Undertaking Project
Phone
Location
Coordinates
Cities
Briones (Nunes) | Moraga (Rocky Ridge & Kaiser Creek), Moraga
Counties
Contra Costa
Regions
Northern California, Unincorporated
Cross Streets
Rocky Ridge Road, Castro Ranch Road
Zip
94556
Total Acres
0.24
Parcel #
258-310-008-2, 432-030-005-8
State Highways
I-680, I-80
Railways
N/A
Airports
N/A
Schools
N/A
Waterways
Kaiser Creek Waterway, San Pablo Reservoir
Township
T0101S
Range
R02W
Section
27, 34
Base
4, 2
Other Location Info
Please see below under "Other Information" for additional Location Details per site.
Other Information
Coordinates
Rocky Ridge 37.80765, -122.06918
Kaiser Creek 37.80182, -122.06939
Nunes 37.95368, -122.22860
Cross Streets
Rocky Ridge & Kaiser Creek - Rocky Ridge Road
Nunes - Castro Ranch Road
Zip Codes
Rocky Ridge & Kaiser Creek - 94556
Nunes - 94553
Total Acres
Rocky Ridge 0.08
Kaiser Creek 0.08
Nunes 0.08
Parcel #
Rocky Ridge & Kaiser Creek - 258-310-008-2
Nunes - 432-030-005-8
State Highways
Rocky Ridge & Kaiser Creek - I-680
Nunes - I-80
Waterways
Rocky Ridge & Kaiser Creek - Kaiser Creek Waterway
Nunes - San Pablo Reservoir
Township
Rocky Ridge & Kaiser Creek - T0101S
Nunes - T01N
Range
Rocky Ridge & Kaiser Creek - R02W
Nunes - R03W
Section
Rocky Ridge - 27
Kaiser Creek - 34
Nunes - 6
Base
Rocky Ridge & Kaiser Creek - 4
Nunes - 2
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
15302
Reasons for Exemption
Project is exempt under Section 15302 and Section 15304 as the scope of work includes replacement of an existing structure and minor alteration to land. Project will have no significant environmental impacts relative to Locations, Cumulative Impact, Scenic Highways, Significant Effect due to unusual circumstances, Hazardous Waste or Historical Resources as pursuant to Section 15300.2 of the CEOA Guidelines.
Exempt Status
Categorical Exemption
Type, Section or Code
15304
Reasons for Exemption
Project is exempt under Section 15302 and Section 15304 as the scope of work includes replacement of an existing structure and minor alteration to land. Project will have no significant environmental impacts relative to Locations, Cumulative Impact, Scenic Highways, Significant Effect due to unusual circumstances, Hazardous Waste or Historical Resources as pursuant to Section 15300.2 of the CEOA Guidelines.
County Clerk
Contra Costa
Attachments
Notice of Exemption
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