Monument Preservation in Benicia, CA

Few California cities carry as much original survey history in their streets as Benicia. The downtown grid dates to the 1840s, predating statehood, and the monuments perpetuating that plat are the controlling evidence for boundaries across the historic core. When a water main replacement, streetscape project, or sidewalk reconstruction cuts through a First Street intersection, it is cutting through ground where the physical monuments matter far more than the paper record — an original or early perpetuated monument on an 1840s plat simply cannot be reconstructed with the same authority once destroyed. Business and Professions Code §8771 requires that before construction disturbs such a monument, a licensed land surveyor reference it and file a Corner Record or Record of Survey, and that the monument be reset and documented after the work. Because Benicia is in Solano County, those filings go to the Solano County Surveyor, with recording handled by the County Recorder — both located in Fairfield, and we manage the filings there as part of every engagement.

At the other end of town, the former Benicia Arsenal is now the Benicia Industrial Park, one of the major warehouse and manufacturing districts on the Carquinez Strait. Trenching is constant there — fire lines, process utilities, fiber, truck-court reconstruction — and the parcels trace back through arsenal-era federal boundaries, so the monuments marking them deserve deliberate protection before excavation. Adaptive-reuse work on the surviving arsenal-era stone and masonry buildings often involves site utilities and grading with the same exposure. For contractors and owners in the Industrial Park, a pre-construction monument survey is inexpensive insurance: the retracement of a destroyed corner across former federal ground costs many times what referencing it would have.

We bring our Trimble terrestrial laser scanner to both settings, capturing each monument inside a survey-grade point cloud of its surroundings — a permanent record that supports defensible resets and clean §8771 compliance documentation.