Tom Paine Slough Geotechnical Investigations

The Tom Paine Slough Geotechnical Investigations Project include soil borings and potentially cone penetration tests (CPTs) which will be used to obtain subsurface information in the vicinity of a siphon facility owned and operated by the Pescadero Reclamation District 2058. These geotechnical investigations would inform the development of design and engineering for a future project that would replace the existing siphon structures with an equivalent structure. The proposed project includes up to 9 over-water borings, and up to 7 on-land borings. All borings will have a maximum diameter of 8 inches and a maximum depth of 150 feet below ground/channel bottom. Up to 4 of the proposed on-land borings may be replaced with CPTs, which will advance to a maximum depth of approximately 100 feet. Project activities are expected to begin in summer of 2026.