SCH Number 2021060346

Project Info

Title

North Mokelumne River Multi-Benefit Project

Description

Portions of the Staten Island levee system, along the North Mokelumne River, are below the Delta Specific PL 84-99 Standard, which requires levee crown elevations be 1.5 feet above the 100-year flood elevation. Additionally, seven levee sections along the North Mokelumne River are experiencing waterside erosion below the normal waterline. The Project includes 16,000 LF of landside levee rehabilitation and 6,125 LF of waterside habitat enhancement above Mean High Water (MHW) from Sta. 1040+00 - 1200+00. Landside work involves raising the levee crown and stabilizing the landside slope through the construction of a counterbalance berm. Levee sections that are experiencing erosion below the normal water line will be setback to restore_ waterside geometry. Aggregate base material will be placed on the levee crown to create an all-weather roadway. Waterside work includes excavation of the existing waterside slope, at the seven setback levees, to construct a habitat bench above MHW. The habitat bench and setback levee waterside slope will be planted with native species. Plantings will be monitored and maintained for 3 years to ensure success criteria is met.

3 documents in project