Colusa Boat Launching Facility Project (Lake or Streambed Alteration Agreement No. 1060-2016-0026-R2)

Colusa Boat Launching Facility Project (Lake or Streambed Alteration Agreement No. 1060-2016-0026-R2)

CDFW has executed Lake and Streambed Alteration Agreement No. 1600-2016-0026-R2, pursuant to section 1602 of the Fish and Game Code to the project Applicant, City of Colusa (Permittee) as represented by Randall Dunn. Project is limited to the construction of a new, two-lane boat launch ramp and modifications to the State Recreation Area's (SRA) developed day-use and camp area. The new location for the ramp was evaluated by the DWR and found to be viable on City-owned property (located at the "mouth" of Roberts Channel where it meets the main river channel). The new two-lane boat launch ramp will be approx. 42 by 190 feet. The upper portion of the ramp (101 feet) will be cast-in-place concrete and placed over an aggregate base. Concrete casting will take place when water levels are low within the Sacramento River so that wet concrete will not be in contact with the River. The lower portion of the ramp (89 feet) (below river low water) will be constructed in water. Precast concrete planks will be placed on top of a prepared pee gravel base. The lower boarding floats will be constructed on both sides of the new boat ramp. The boat ramp floats extend approx. 100 feet out from the boat ramp. Silt curtains will be used to contain any construction related turbidity and suspended sediments. Work in water will be performed with a crane or loader located onshore and a construction crew of 4-6 workers utilizing hand power tools and a generator in addition to the crane/loader. Fill material will be placed from the top of the slope to form the side of the ramp at Roberts Channel, with rock slope protection on the surface. The SRA developed day-use and camp area will also be redeveloped with reconfiguration/resurfacing of the existing parking lots and the existing access driveway, as well as new pedestrian access, fish-cleaning station facilities, re-vegetation, signage, and utilities for a restroom which will be constructed at a later date. The reconfigured parking lot will facilitate parking spaces for standard cars and trailers. A new roadway approach that will connect the parking facilities to the new boat ramp will also be constructed. Six piles associated with the new boat launch ramp will be installed using onshore equipment. The piles will be made of steel between 12-18 inches in diameter. A vibratory hammer will be used to drive the piles to minimize sound levels underwater. Due to the smaller size of the piles and shallow water at the time of pile driving, it is not anticipated that sound levels underwater would exceed 206 decibel which is the threshold limit for salmonids.

Colusa

Colusa