This project re-plants an area adjacent to Brookdale Avenue, north of Linden Lane, in San Rafael with trees and shrubs, as part of visual mitigation for the US 101 High Occupancy Vehicle (HOV) Gap Closure Project. The 4.5 mile HOV Gap Closure Project in San Rafael closed the remaining gap in the 17-mile corridor on US101 between the Richardson Bay Bridge in Sausalito and State Route 37 in Novato to provide a continuous HOV lane in both directions.
The Brookdale Avenue Visual Mitigation project will plant approximately 27,000 square feet of native trees and shrubs and will monitor and maintain the plants during a 5-year plant establishment period. The project is contained within the Caltrans right-of-way.
The project will plant native trees and shrubs including Western Redbuds (12), Oregon Ash (5), Coast Live Oaks (6) and Blue Elderberry (7). The project will retain existing street trees and mature, healthy trees on the site. Invasive species and weeds will be removed and the area will be mulched to prevent their return. The highly deteriorated sidewalk along with remnant stairs or small retaining walls will also be removed. A number of abandoned curb cuts will be removed and replaced with standing concrete curb and drainage gutter pan.
TAM will manage the construction of the Visual Mitigation Project under a Cooperative Agreement with Caltrans. Caltrans agreed to fully fund the design, construction, and construction administration.
Construction bids were opened on September 13, 2016. On September 22, 2016 the TAM Board awarded the contract to the landscape firm Bortolussi & Watkin of San Rafael.
Offsite Environmental Mitigation
As part of the efforts to mitigate for project impacts associated with the construction of the HOV Gap Closure Project Caltrans committed to compensation efforts for the unavoidable impacts to Irwin Creek. During construction the flow line of the creek was relocated to accommodate for the new features of the highway widening project. As a good steward of our environment the State of California Department of Transportation has worked closely with the City of Sausalito and the California State Parks Department to identify off-site opportunities to enhance and improve high quality natural resources within Marin County. Off-site enhancements include preserving open space in Sausalito as part of a collaborative effort amongst multiple partners or restoring a portion of the Glenview Creek area adjacent to China Camp State Park in San Rafael.
TAM is proud of our roles to improve our environment using funding identified for transportation purposes.
Project construction is expected to begin in October 2016 and be complete by the end of the calendar year. Plant monitoring and maintenance will continue for 5 years.
The project is funded through the State Transportation Improvement Program (STIP), administered by the California Transportation Commission (CTC).
The project budget is $960,000 for design, construction and contract administration and offsite mitigation.
Construction & Off-Site Mitigation:
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