Castaic Dam High Intake Tower Bridge Retrofit Project (Lake or Streambed Alteration Agreement No. 1600-2020- 0102-R5)
5 Documents in Project
Summary
SCH Number
2020049025
Lead Agency
California Department of Water Resources
(DWR)
Document Title
Castaic Dam High Intake Tower Bridge Retrofit Project (Lake or Streambed Alteration Agreement No. 1600-2020- 0102-R5)
Document Type
NOD - Notice of Determination
Received
Posted
10/2/2020
Document Description
The California Department of Fish and Wildlife (CDFW) has executed Lake and Streambed Alteration Agreement number 1600-2020-0102-R5, pursuant to section 1602 of the Fish and Game Code to the project Applicant, Jeanne Kuttel.
The primary purpose of the Project is to retrofit the Tower Bridge at Castaic Lake to make it more seismically safe and to screen large debris from potentially clogging the High Tower outlet tunnel. Construction will occur at the Tower Bridge, High Tower abutment, Piers 2 through 4, and Abutment 5. To access the pier footings, the lake’s surface elevation would be lowered from the normal operation elevation of approximately 1,505 feet above sea level (amsl) to 1,380 feet amsl. The drawdown from 1,505 feet amsl to 1,380 feet amsl will take approximately 5 months, beginning around June 1, 2021 and reaching 1,380 feet amsl around November 1, 2021. The lake would remain at the lowered level through December 15, 2021, after which refilling of the lake would begin. The lake would return to its normal operating elevation of 1,505 feet amsl in April 2022.
Contact Information
Name
Emily Galli
Agency Name
Department of Fish and Wildlife
Contact Types
Lead/Public Agency
Phone
Location
Cities
Los Angeles, Santa Clarita
Counties
Los Angeles
Other Location Info
The project is located within the immediate vicinity of Castaic Lake. Castaic Lake is located approximately 41 miles northeast of downtown Los Angeles, within the Sierra Pelona Mountains, and north of Santa Clarita along Interstate-5 (I-5). The Castaic Dam High Intake Tower Bridge (Tower Bridge) and the Castaic Dam High Intake Tower (High Tower) are located within the southwestern portion of the lake on Castaic Dam’s right abutment. The project site can be located using the following information: Latitude 34.522414, Longitude 118.613628; USGS 7.5 Minute Quadrangle Map Name Warm Springs Mountain, Township 5 North, Range 17 West
Notice of Determination
Approving Agency
CDFW
Approving Agency Role
Responsible Agency
Approved On
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 Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
No
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
No
Attachments
Notice of Determination
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