Memorandum
Item 1
9:05 A.M.
January 28, 2021
STAFF REPORT
TO: Planning Commission
FROM: Scott Deleon, Community Development Director
Toccarra Thomas, Deputy Director
Sateur Ham, Assistant Planner
DATE: January 21, 2021
SUBJECT: General Plan Conformity Report, GPC 12-10
Initial Study, IS 12-27
ATTACHMENTS: 1. Vicinity Map
2. Initial Study, IS 12-27
3. Mitigation Monitoring and Reporting Program
4. Agency Comments
EXECUTIVE SUMMARY
The Lake County Department of Public Works is requesting an approval of a General Plan Conformity Report to replace the existing bridge with a new structure that will meet current design and safety standards, improve public safety, and provide long term value for the County. The project site is located on First Street approximately 0.1 miles east of Main Street, near the single-family and two-family residential zoned community in Upper Lake over Clover Creek.
Utility relocation is anticipated for conflicts with overhead lines. Underground water line relocation may also be required. Adjustments to underground sewer and water manholes, valve boxes and cleanouts will be performed as needed to match the proposed grades.
The entire existing roadway is within County right-of-way which has a minimum width of 50'. Any additional need for right-of-way acquisition, rights of entry, or temporary construction easements will be minimized by maintaining the existing roadway alignment. Right of way and temporary construction easements will be purchased from portions of the four parcels at each corner of the bridge to accommodate construction of the culvert and roadway approaches.
The proposed project consists of the replacement of an existing single span reinforced concrete haunched T-girder (Bridge No. 14C-0015) over Clover Creek with a three 12' x 8' cell cast-in-place reinforced concrete box culvert. The continuous mat foundation of the box culvert is well suited design for the weak liquefiable soils at the site. The ne...
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