Hemphill Diversion Structure Project

5 Documents in Project


SCH Number
Lead Agency
Nevada Irrigation District
Document Title
Hemphill Diversion Structure Project
Document Type
NOD - Notice of Determination
Document Description
The existing Hemphill Diversion Structure is substantially deteriorated, and the structure continues to obstruct the passage of anadromous fish species under most flow conditions. Additionally, the existing diversion to Hemphill Canal is unscreened and does not exclude fish from entering the canal. The removal of the diversion structure is necessary to allow for fish migration to occur year-round within Auburn Ravine. NID proposes to remove the existing Hemphill Diversion Structure and the Hemphill Canal inlet structure. The proposed project will construct a roughened channel (rough-rock ramp), install bank stabilization and erosion control measures within Auburn Ravine, construct a modified inlet structure incorporating a cone fish screen on Hemphill Canal, and make modifications to the canal.

Contact Information

Patrick Moeszinger
Agency Name
Department of Fish and Wildlife
Job Title
Senior Environmental Scientist (Specialist)
Contact Types
Responsible Agency


Northern California
Other Location Info
The project site is located at the Hemphill Diversion Structure located in Auburn Ravine.

Notice of Determination

Approving Agency
California Department of Fish and Wildlife
Approving Agency Role
Responsible Agency
Approved On
County Clerk
Final Environmental Document Available at
the office location listed above for the Lead Agency. CDFW’s record of execution of the above Lake and Streambed Alteration Agreement as Responsible Agency is available at CDFW’s regional office.


(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


Notice of Determination

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 state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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