The California Department of Transportation proposes the improvement of the existing roadway conditions and enhancement of traffic safety by installing lighting along eastbound I-580 from West Grant Line Road undercrossing (PM 1.3) to North Flynn Road (PM 6.0) overcrossing east of the City of Livermore in Alameda County. The Project will install 500 feet of new concrete barrier, 48 new power poles and two underground electrical vaults on the southern side of eastbound I-580 to provide power for the safety lighting.
The Biological Study Area (BSA) is approximately 160.19 acres and includes the section of I-580 between PM 1.3 to PM 6. The Project is expected to impact 29.56 acres of suitable habitat for Covered Species (California tiger salamander) within the I-580 corridor, suitable habitat includes the permanent loss of 0.04 acres, temporary impact to 7.97 acres and 21.55 acres of indirect impact resulting from additional light source installations.
The project is expected to result in incidental take of the Covered Species, as defined by Fish and Game Code in the form of pursue destruction of burrows and dens that the Covered Species inhabit; being crushed under moving vehicles and equipment; disturbance in the vicinity of dens or burrows; desiccation or predation along fence lines and other barriers to movement; and habitat alteration and decreased survivorship resulting from the installation of additional light sources, resulting in increased light pollution to Covered Species habitat. Take may also occur in the form of pursue, catch, capture, or attempt to do so from capture and relocation attempts. Relocation could result in mortality, injury, and/or disease transmission to Covered Species, both designated as a threatened species under CESA. The ITP referenced above as issued by CDFW authorizes incidental take of species listed under CESA that may occur as a result of Project implementation.