Minor Alteration No. WA2023201 – Yolo Bypass Shag Slough Geotechnical Investigations

Reclamation District 2068 is conducting up to 25 geotechnical explorations along Shag Slough between Levee Mile 3.2 and 5.5 in Dixon, California, to assess levee stability and seepage conditions. These investigations will involve drilling borings and deploying Cone Penetration Tests to a maximum depth of 60 feet, spaced approximately 500 feet apart, with the primary objective of collecting soil samples and material properties for laboratory analysis. The work is being carried out under the oversight of the Central Valley Flood Protection Board and must adhere to standards established by the U.S. Army Corps of Engineers and the Office of Safety and Occupational Health, in full compliance with federal, state, and local engineering and environmental regulations. The project is authorized under a CEQA categorical exemption (Section 15306), and no formal federal contract clauses, pricing data, or solicitation number are present, indicating this is a state-level environmental and engineering initiative rather than a traditional federal procurement. The place of performance is clearly defined as Dixon, California, with no specified contract value, payment terms, or procurement methodology outlined. Although point of contact information is provided for Angela Nguyen-Tan of the Central Valley Flood Protection Board and Michael Moncrief of Reclamation District 2068, their official roles as COR, COTR, or PCO are not confirmed. The activities are expected to occur in early 2026, with no formal delivery schedule, inspection protocols beyond site compliance, or submission deadlines detailed in the documentation.