Kimtu Meadows Mutual Water Company Consolidation: Civil Engineering, CEQA Documents, and Permitting

Kimtu Meadows Mutual Water Company (Kimtu) was under a boil-water notice and their system had been unreliable. In order to resolve these issues, Kimtu retained LACO to provide planning, engineering and consulting services to consolidate with Garberville Sanitary District (GSD) in Humboldt County, CA.

Our project team has been involved on many levels of this project including:

  • Preliminary site investigations
  • Preparation of an easement assessment
  • Water rights research
  • Coordination with the California Department of Public Health (CDPH), Kimtu, and GSD
  • Mapping the distribution main piping
  • Preparation and submittal of Proposition 50 supporting documents to obtain project funding which included:
    • Preliminary Engineering Report update
    • Environmental Information Form (EIF)
    • Construction cost estimates
    • Preparation of and NEPA (CEQA PLUS) documents, including CEQA-PLUS environmental documents
    • Management of sub-consultants for Section 7 of the Endangered Species Act (ESA) and Section 106 of the National Historic Preservation Act (NHPA)
    • Preparation of an Initial Study and Mitigated Negative Declaration including a Mitigation Monitoring Program

The total project cost of the construction is estimated to be roughly $1.8 million, and the project was funded through Prop 50 and State Revolving Funds.

Our hydraulic analysis and determination of the feasibility of annexing the Kimtu system into GSD was a critical aspect of the project. Our team developed a hydraulic model to determine the minimum diameter of mainline pipe necessary to convey maximum day water demand plus fire flow through multiple pressure zones across a distance of approximately two miles between GSD and Kimtu Meadows, and to evaluate the impacts to the Garberville water system. The feasibility analysis concluded adequate source capacity and storage provisions within GSD’s existing system, plus took into account the ongoing GSD Water System Improvement Project and future growth. The result was a preliminary design ensuring capacity for domestic and fire water supply without impact to GSD’s ability to supply its existing customer base.

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