Important note: the following recommendation was approved by the Board of Supervisors on Oct. 18, 2016:

DISTRICT 3 (Supervisor Don Horsley) FY 2016-17 Measure A Request

Emergency Repair to a Gully Adjacent to Cloverdale Road: Grant up to $250,000 in Measure A funds to the Peninsula Open Space Trust

These funds represent an approximately 50/50 cost share with Peninsula Open Space Trust (POST) to repair a large gully that developed during a March 2016 storm event in an area adjacent to Cloverdale Road.

Drainage runs parallel to Colverdale Road within or immediately adjacent to County Right-of- Way towards an area of fallow land which gave way during the storm, creating an approximately 75’ to 100’ long gully that came within 20 feet of Cloverdale Road. An estimated 4,000 cubic yards of sediment was lost with storm water carrying the material into Butano Creek. POST installed a temporary pipe to convey storm water past the opening of the gully to prevent widening during the storm event. A second area of gully subsequently opened in an area 100 feet from the County’s 1960s-era bridge over Butano Creek at Cloverdale Road.

Working in parnterhip, County Public Works, POST, the San Mateo County Resource Conservation District (RCD), and my office have coordinated with state and federal permitting agencies and the engineer hired by the property owner, to devlop a project design and permitting strategy for work to repair the gully before the end of the construction season in 2016.

With the necessary funding and permits, the proposed project can be completed within 2 weeks without rain, or 3-4 weeks accommodating for rain. The RCD and POST have identified a contractor available to do the work. If permits are in place, work can begin in late October.

Without immediate action, the County road and bridge over Butano Creek on Cloverdale Road may become threatened by further erosion at the gully location. Additional sediment loads may enter Butano Creek, negatively impacting Steelhead and other species, if a solution to drainage from the County’s Right-of-Way and erosion from the gully on POST property are not addressed before rains return this fall.

POST is initiating the project to increase the likelihood that the improvements necessary to address the Cloverdale Gully can be completed this year. The County will reimburse POST with a combination of labor from Public Works for gully grading (in-kind) and up to $250,000 maximum to meet a project-share level of 50% of the total project cost.

Total Measure A Request: $250,000

Important note: this is a copy of the official report -- item 6 on the Board's agenda.