Route 580 Westbound High Occupancy Vehicle Lane Widening

6 Documents in Project

Summary

SCH Number
2009032084
Lead Agency
Caltrans 4 (Oakland) (California Department of Transportation, District 4)
Document Title
Route 580 Westbound High Occupancy Vehicle Lane Widening
Document Type
NOD - Notice of Determination
Received

Document Description
The Permittee proposes to widen westbound 580 along a 13.1 mile stretched to accommodate a new High Occupancy Vehicle (HOV) widening. The proposed widening will impact DFG stream jurisdiction of the following waterways: Arroyo Las Positas, Arroyo Seco Creek, and Tassajara Creek. The California Department of Fish and Game (DFG) is issuing Streambed Alteration Agreement #1600-2010-0284-R3 for this Project. Two bridges will be widened over Arroyo Las Positas. All bridge piers will be installed outside of the active channel, the new piers will require pile driving for installation. Arroyo Las Positas will be diverted around the construction site in order to protect the creek during construction activities. This work will result in approximately 1000 square feet of permanent shading of the creek and 12,000 square feet of temporary impacts from the creek diversion. The concrete box culvert at Arroyo Seco Creek will be extended to accommodate the HOV widening. Approximately 54 cubic yards of concrete and rock slope protection will be place in the waterway, resulting in approximately 1200 square feet of permanent loss of native riparian habitat. The bridges crossing Tassajara Creek will be widened into the median over a concrete lined channel causing temporary impacts from the creek diversion and permanent shading impacts.

Contact Information
Melissa Escaron
California Department of Fish and Game
Bay Delta Region 7329 Silverado Trail
Napa, CA 94558

707-339-0334

Location

Cities
Dublin Livermore Pleasanton
Counties
Alameda
Cross Streets
I-580 Westbound Greenville Road (PM 8.29) to san Ramon/Foothill Road (PM 21.43)
Parcel #
multiple
State Highways
I-680
Railways
BART - Dublin/Pleastn
Airports
Livermore Municipal
Waterways
Arroyo Mocho; Arroyos Las Positas; Tassajara Creek
Range
13.1mi

Notice of Determination

Approving Agency
California Department of Fish and Game
Approving Agency Role
Responsible Agency
Approved On
Final EIR Available Location
California Department of Transportation, Ed Pang 510-286-5609

Determinations

(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(3) Mitigated measures were made a condition of the approval of the project
N/A
(4) A Statement of Overriding Considerations was adopted for this project
N/A
(5) Findings were made pursuant to the provisions of CEQA
N/A
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