North Marin Line Stabilization Project
3 Documents in Project
Summary
SCH Number
2025100945
Lead Agency
Marin Municipal Water District
Document Title
North Marin Line Stabilization Project
Document Type
NOD - Notice of Determination
Received
Posted
12/19/2025
Document Description
Marin Water proposes to replace two seismically unsound San Geronimo Creek pipeline crossings of the North Marin Line (NML) with seismically resistant crossings. Marin Water would replace one pipeline crossing with approximately 1,700 feet of new pipeline within Sir Francis Drake Boulevard. The other pipeline crossing would be replaced with a 36-inch pipeline installed within a single span steel truss supported on drilled piers. The pipeline would emerge from the ground approximately 20-feet back of the creek’s top-of-bank and rise approximately 2 to 3-feet above the adjacent ground surface before crossing the creek. The Project also includes cutting and removing the existing pipeline and existing piles in San Geronimo Creek. The Project would be constructed between August and November 2026. The new pipeline segments would operate as the current NML does, providing water to Marin Water customers.
Contact Information
Name
Carly Blanchard
Agency Name
Marin Municipal Water District
Job Title
Environmental Planner
Contact Types
Lead/Public Agency / Project Applicant / Parties Undertaking Project
Phone
Location
Coordinates
Cities
Fairfax, Unincorporated Area
Counties
Marin
Regions
Citywide, Countywide
Cross Streets
Sir Francis Drake Boulevard between Lagunitas Road and Lower Peters Dam Road
Zip
94938
Total Acres
1.5
Parcel #
168-222-01,168-222-02,168-222-04,168-222-09,170-041-09,170-062-18,170-062-19,168-211-15,170-051
State Highways
1
Railways
N/A
Airports
N/A
Schools
Lagunitas Elementary, San Geronimo Valley Elementary, West Marin
Waterways
Kent Lake, San Geronimo Creek, Lagunitas Creek
Base
Mt. Tam
Other Information
Note that there is no mapped township, section, or range for this part of Marin County
Notice of Determination
Approving Agency
Marin Municipal Water District
Approving Agency Role
Lead Agency
Approved On
County Clerk
Marin
Final Environmental Document Available at
https://marinwater.org/wp-content/uploads/2025/12/North-Marin-Line_Final-ISMND_Dec2025.pdf
Determinations
(1) The project will have a significant impact on the environment
Yes
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
Yes
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes
Attachments
Notice of Determination
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