Marin County Open Space District's Road and Trail Management Plan Tiered Program Environmental Impact Report Consistency Assessment Bob Middagh and Gas Line Tra
8 Documents in Project
Summary
SCH Number
2011012080
Lead Agency
Marin County
Document Title
Marin County Open Space District's Road and Trail Management Plan Tiered Program Environmental Impact Report Consistency Assessment Bob Middagh and Gas Line Tra
Document Type
NOD - Notice of Determination
Received
Posted
7/14/2017
Present Land Use
Applies to 34 preserves with zoning and plan designations mostly for open space, with some areas zoned for residential
Document Description
MCOSD proposes to implement trail and drainage improvements to the Bob Middagh and Gas Line Trails in the Alto Bowl Open Space Preserve. The proposed realignments, drain dips, new culverts, change of use, and other actions to protect the environment and improve the user experience would increase the sustainability of the trail consistent with the Road and Trail Management Plan (RTMP) policies, best management practices (BMPs), and trail design standards. These measures would substantially reduce, over the existing trails, impacts from erosion and runoff into nearby drainages, thereby reducing sedimentation into the Richardson Bay watershed.
Modifications to the Bob Middagh Trail include realignment of 1,952 feet of new trail, decommissioning of 938 feet of existing trail, installation of four sloped climbing turns, installation of three rock retention walls, construction of one rock armor swale 20 feet wide by ten feet long, replacement of two failing culverts, and changing the use designation to allow bicycles. Improvements to the Gas Line Trail include constructing 1,610 feet of new contoured trail at an average seven percent grade, installing appropriate dewatering measures for a more sustainable design and reduce potential sediment loading to streams, realigning 480 feet of the existing Horse Hill Trail, decommissioning 1,554.2 feet of existing social trails, and incorporating other actions to protect the environment and improve the user experience. MCOSD would build the new trail using the RTMP's policies, design standards, and BMPs.
Contact Information
Name
Kristina Tierney
Agency Name
Marin County Open Space District
Contact Types
Lead/Public Agency
Phone
Location
Cities
San Rafael
Counties
Marin
Regions
Countywide
Cross Streets
County Wide
Total Acres
15113.28
State Highways
Hwy 101, 1, I-580
Airports
Marin County & San Rafaels
Waterways
Novato, Miller, Corte Madera, San Geronimo Creeks
Other Location Info
San Geronimo
Notice of Determination
Approving Agency
Marin County Open Space District, Board of Directors
Approving Agency Role
Lead Agency
Approved On
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
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
No
(4) A mitigation reporting or monitoring plan was adopted for this project
N/A
(5) A Statement of Overriding Considerations was adopted for this project
N/A
(6) Findings were made pursuant to the provisions of CEQA
N/A
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.