Coastal Treatment Plant Export Sludge Force Main Replacement

5 Documents in Project

Summary

SCH Number
2011051010
Lead Agency
South Orange County Wastewater Authority
Document Title
Coastal Treatment Plant Export Sludge Force Main Replacement
Document Type
NOD - Notice of Determination
Received
Posted
9/21/2015

Document Description
The SOCWA proposes to replace approximately 16,600 ft of two existing parallel 4-in pipelines between the Coastal Treatment Plant (CTP) and Alicia Parkway in Orange County, CA. This project was analyzed within an EIR prepared for the Coastal Treatment Plant Export Sludge Force Main Replacement Project (Dudek 2013). Since that EIR was prepared the SOCWA has proposed improving a section of the creek bank along Lower Aliso Creek to provide erosion protection and improved stability for the existing infrastructure in the area as well as for the proposed force main replacement pipeline. The proposed improvements include constructing three rock groins or dikes at selected locations to redirect flows along the channel bank away from the bank and allow for capture of sediment upstream of the groins/dikes resulting in the build up of sediment at the lower bank. The groin/dikes would extend out from the channel bank approximately 20-ft across the berm to the edge of the low flow channel. The top width of the groins/dike would be approximately 5 ft. The median seize of the dike rock would be 24 inches with a max of 36 in. This improvement allows for natural revegetation along the berm between the groins/dikes and does not require any fill in the low flow channel or removal of existing channel banks. In addition to these stabilization features, the alignment of the pipeline would be slightly revised in two locations.

Contact Information
Brian Peck
South Orange County Wastewater Authority
Lead/Public Agency
34156 Del Obispo Street
Dana Point, CA 92629

Phone : (949) 234-5411
bpeck@socwa.com

Location

Coordinates
33°32'27"N 117°44'11"W
Cities
Laguna Niguel
Counties
Orange
Cross Streets
AWMA Road and Alicia Parkway
Zip
92677
Total Acres
15
Waterways
Aliso Creek, Sulphur Creek, Pacific Ocean
Township
7S
Range
8W
Other Location Info
City of Aliso

Notice of Determination

Approving Agency
South Orange County Wastewater Authority
Approving Agency Role
Lead Agency
Approved On
Final Environmental Document Available at
34156 Del Obispo St, Dana Point, CA 92629

Determinations

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

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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