Hemphill diversion project
with flashboards installed
Hemphill Diversion Structure

The Hemphill Diversion Structure is located on Auburn Ravine northeast of the City of Lincoln in Placer County.  The structure diverts water from Auburn Ravine into the Hemphill Canal located south of the ravine for delivery to NID raw water customers.  The Hemphill Diversion Structure is an approximately 8-foot tall concrete structure that has been utilized by the District since its purchase of the facility in 1933.

Auburn Ravine is identified as a salmon and steelhead habitat and the Hemphill Diversion Structure has been identified as a barrier to fish passage.  The District proposes to remove the Hemphill Diversion Structure within Auburn Ravine.

The District is considering implementing one of three Project alternatives. The alternatives would require the removal of the existing Hemphill Diversion Structure.  All are designed to allow for anadromous fish migration beyond the Hemphill Diversion Structure site.  The District has not yet identified a preferred alternative.

The Project Draft EIR document is comprised of 4 chapters, with the project descriptions in chapter 2.0, the environmental setting, impacts and mitigation in chapter 3.0, and the comparative alternatives analysis in chapter 4.0. The summary of the alternatives analysis can be found in section 4.5 on pages 4,25-29.

Based on the comparative analysis, Alternative 2-the Fish Passage Alternative- is considered to be the Environmentally Superior Alternative. In addition, preliminary cost estimates were prepared and are in appendix 2B and Alternative 2 was found to be the least expensive alternative.

I am pleased with these findings and look forward to the day when the Hemphill diversion dam no longer impedes passage for migrating steelhead trout and chinook salmon that spawn upstream of the diversion in the Auburn Ravine.

The formal public review and comment period for the Draft EIR ended on May 17, 2021.  NID staff is addressing comments and will bring the proposed final document to the Board for adoption this summer.  The Project Draft EIR can be found here:

Installation of Digital Management Systems

Enterprise Resource Planning (ERP) is a business process management software that manages and integrates a company’s financials, supply chain, operations, reporting, manufacturing, and human resource activities. Computerized Maintenance Management System (CMMS) is an asset management software program that centralizes maintenance information and facilitates the processes of maintenance operations. Once these two important upgrades are launched, we will have a far greater understanding of the condition of our business practices and assets and will be able to make more informed decisions.