Monument Preservation in Walnut Creek, CA

Downtown Walnut Creek is in a long construction cycle: condo and mixed-use projects, streetscape upgrades, and the utility trenching that follows all of it through the blocks around Broadway Plaza. Every one of those trenches and excavations crosses ground where street monuments control the downtown grid — and the commercial land values here make that control expensive to lose. Business & Professions Code §8771 requires that before construction disturbs a monument, a licensed surveyor reference it and file a Corner Record with the Contra Costa County Surveyor, then reset the monument and file a post-construction Corner Record when the work is done. On high-value downtown frontage, a destroyed monument does not just inconvenience a future surveyor — it injects boundary uncertainty into properties where a few tenths of a foot of frontage carries real money, and the retracement to resolve it costs a multiple of what preservation would have.

We provide monument preservation for developers, contractors, and utility districts working in Walnut Creek: downtown corridor sweeps ahead of trenching, site-perimeter preservation for redevelopment parcels, and street-program work out into the postwar ranch tracts, where original subdivision monuments still control quiet residential blocks. Creek corridors add a wrinkle — monuments near channel improvements and drainage work are easy to overlook in project planning and just as protected under §8771 as any intersection disk.

Because downtown work windows are tight and traffic control is expensive, our Trimble terrestrial laser scanner is a genuine schedule tool here: in one mobilization we reference the monuments and scan the corridor — pavement, curbs, storefront frontage, surface utilities — at millimeter density. The project gets its §8771 compliance and a pre-construction point cloud of the work zone from a single closure, with no return visits.