Mt. Tamalpais Culvert Maintenance and Replacement Project (Lake or Streambed Alteration Agreement No. 1600-2019-0270-R3)
9 Documents in Project
Summary
SCH Number
2004082018
Lead Agency
Marin Municipal Water District
Document Title
Mt. Tamalpais Culvert Maintenance and Replacement Project (Lake or Streambed Alteration Agreement No. 1600-2019-0270-R3)
Document Type
NOD - Notice of Determination
Received
Posted
2/14/2020
Document Description
The California Department of Fish and Wildlife (CDFW) has executed Lake and Streambed Alteration Agreement number 1600-2019-0270-R3, pursuant to section 1602 of the Fish and Game Code to the project Applicant, Marin Municipal Water District (MMWD). The project will replace 29 metal culverts along seven road segments within intermittent and ephemeral streams on MMWD property over the course of five years. Twenty-three of the culverts will be replaced with corrugated metal and will be upsized to be able to convey the estimated 100-year flood and associated sediment loads. Six of the 29 culverts will be replaced with rock crossings, resulting in the removal of approximately 127 linear feet of culverts. Approximately 55 cubic yards of rock riprap (approximately half of which will be repurposed rock on-site) will be installed in streams at culvert outlets to provide scour protection. The project will remove three Douglas fir trees and temporarily impact 0.31 acres of riparian vegetation. The project will mitigate for these impacts by planting native riparian vegetation and trees and removing invasive plant species along streams on the property, over an area of 0.61 acres.
Contact Information
Name
Garrett Allen
Agency Name
Department of Fish and Wildlife
Contact Types
Lead/Public Agency
Phone
Name
Agency Name
Marin Municipal Water District
Contact Types
Project Applicant
Location
Counties
Marin
Other Location Info
The project is located at various unnamed streams within the Mt. Tamalpais Watershed on Marin Municipal Water District property, Marin County, State of California.
Notice of Determination
Approving Agency
Department of Fish and Wildlife
Approving Agency Role
Responsible Agency
Approved On
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
Yes
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
No
(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
No
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
No
Attachments
Notice of Determination
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