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 had been identified as a salmon and steelhead habitat and the Hemphill Diversion Structure has been identified as a barrier to fish passage. The District proposed to remove the Hemphill Diversion Structure within Auburn Ravine.
The District considered implementing one of three Project alternatives. The alternatives would require the removal of the existing Hemphill Diversion Structure. All were designed to allow for anadromous fish migration beyond the Hemphill Diversion Structure site.
Based on the comparative analysis, Alternative 2-the Fish Passage Alternative- was considered to be the Environmentally Superior Alternative. In addition, preliminary cost estimates were prepared and Alternative 2 was found to be the least expensive alternative.
At the Board meeting on July 28, 2021, Alternative 2-the Fish Passage Alternative- was unanimously chosen by the members. Since I was responsible for adding that particular alternative, I’m quite pleased that it turned out to be the one chosen.
Installation of Digital Management Systems
Staff presented a Status Update of this work at the July 28, 2021 meeting. The two processes have been uncoupled because the CMMS component of the project is further along in development and is now ready to enter into the final training and testing phases of project development. The ERP component of the project still requires work to ensure that the ERP meets the District’s financial management and reporting needs.
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.
English Meadow Restoration
On July 14, 2020, at their regular meeting, the NID Board of Directors adopted the Mitigated Negative Declaration document which will trigger the implementation of $1.2 million grant from the Wildlife Conservation Board for the English Meadow Floodplain Enhancement and Restoration Project. This project, scheduled for implementation in summer 2021, will install woody debris in the Middle Yuba River to activate the floodplain and improve hydrology. For more details on this project, go to <https://www.nidwater.com//nid-moves-ahead-to-restore-the-english-meadow-floodplain>
Scotts Flat and Rollins Reservoir Fire Forest Improvement Project
$981,000 grant from Sierra Nevada Conservancy for $145,000 grant from Cal Fire Forest Improvement Program to thin 300 acres at Scotts Flat and 103 acres at Rollins reservoir.
Staff is reviewing a district-wide reservoir study to understand the diminished capacity of our reservoirs due to sedimentation. This will assist in prioritizing sediment removal projects and preparing cost estimates.