Monument Preservation in Crockett, CA

Crockett grew up as the company town of the C&H Sugar refinery, its early-1900s houses stacked on small terraced lots climbing steeply from the waterfront. The streets that serve those terraces are narrow, steep, and county-maintained — and the water, sewer, and gas lines beneath them are old enough that utility replacement projects are a recurring fact of life here. Every one of those trenching projects passes through streets where survey monuments control the boundaries of tightly packed hillside lots, many separated by retaining walls built to the line generations ago. On lots this small, a boundary shift of inches matters, which makes the monuments in Crockett's streets disproportionately valuable and their destruction disproportionately costly.

Business and Professions Code §8771 requires that before construction disturbs a monument, a licensed land surveyor must reference it and file a Corner Record with the county surveyor — for Crockett, the Contra Costa County Surveyor in Martinez — and then reset the monument and file again once the work is done. The hillside terrain that makes Crockett charming also makes conventional surveying slow: steep grades, stacked walls, and limited sight lines between terraces. This is where our Trimble terrestrial laser scanner earns its keep. From a handful of setups we capture the full street section at survey grade — monuments, curb lines, retaining walls, and the improvements crowding the right-of-way — so every monument in the trench alignment is referenced against a dense, permanent record of its surroundings before the excavator arrives.

For utility districts and contractors planning main replacement in Crockett, the comparison is stark: referencing and resetting monuments under §8771 is a modest, predictable line item. Retracing boundaries on terraced 1900s lots after the monuments are gone — with retaining walls and record gaps complicating every corner — can cost an order of magnitude more, on someone else's schedule.