Triangle Rock Culverts Project

2 Documents in Project


SCH Number
Lead Agency
San Luis Water District
Document Title
Triangle Rock Culverts Project
Document Type
NOD - Notice of Determination
Document Description
The Triangle Rock Products Los Banos facility currently uses and maintains two existing dry creek crossings over Los Banos Creek. The dry creek crossings are permitted via an existing Streambed Alteration Agreement (SAA; File No. R4-2001-0098D). The creek crossings can only be used when the creek is dry pursuant to the terms of the existing SAA. Periodic water releases from Los Banos Creek Detention Dam between September and March close the creek crossings and cut off vehicle access between resource recovery sites and the processing facility when the road is inundated by creek flow. The proposed Project will install two culvert pipes at the south crossing and three culvert pipes at the north crossing to divert flow under the improved access road to facilitate year-round vehicle use of the road. The improved road crossings will facilitate continuous vehicle transport over Los Banos Creek from permitted and existing mineral resource recovery sites to the processing plant at all times of the year. While the Project will facilitate continuous transport over Los Banos Creek, the total number of truck trips would not be increased as facility production is limited by Triangle Rock’s air permits. As an ancillary benefit, the Project will also facilitate permitted and existing water management activities in the region.

Contact Information

Steven Stadler, PE
Agency Name
San Luis Water District
Job Title
General Manager
Contact Types
Lead/Public Agency / Project Applicant / Parties Undertaking Project


Los Banos
Northern California
Parcel #
083-210-022, and 088-070-002
Other Location Info
The Project is located in Merced County, California, approximately 111 miles south of Sacramento. The Project Area is located approximately on Assessor’s Parcel Number(s) 083-210-022, and 088-070-002. The proposed culvert locations are located within the existing Triangle Rock Plant/Facility/Quarry. The centroid of the northwest culvert Project Area is 37° 01’ 09.77” N, 120° 53’ 51.94” W. The centroid of the southeast culvert Project Area is 37° 00’ 36.69” N, 120° 54’ 16.66” W.

Notice of Determination

Approving Agency
San Luis Water District
Approving Agency Role
Lead Agency
Approved On
County Clerk
Final Environmental Document Available at
San Luis Water District - District Office located at 1015 Sixth Street, Los Banos, CA 93635


(1) The project will have a significant impact on the environment
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
(3) Mitigated measures were made a condition of the approval of the project
(4) A mitigation reporting or monitoring plan was adopted for this project
(5) A Statement of Overriding Considerations was adopted for this project
(6) Findings were made pursuant to the provisions of CEQA


Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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