The investigation would drill on the northeast and northwest sides of the California Aqueduct. Two borings are anticipated at the proposed locations using two different machines. First, a hollow stem auger would drill a 6-inch diameter boring to groundwater level (about 60 feet). The rest of the work would be done using a self casing wire line mud rotary drill rig. The rig would drill a 4-inch diameter boring to the maximum depth of 200 feet. The proposed drilling would occur within the California Department of Water Resources' right-of-way and is anticipated to take two weeks to complete. All work would be limited to the California Department of Water Resources right-of-way.
The California Department of Transportation proposes to conduct a subsurface investigation along State Route 46 at (approximately) Post Miles (PM) 29.96 and 30.03.
Notice of Exemption
Type, Section or Code
Reasons for Exemption
Caltrans has determined the proposed subsurface investigation would not have a significant effect on the environment Furthermore, it was determined the proposed investigation would not occur in a sensitive environment.