Monument Preservation in Orinda, CA

We preserve survey monuments in Orinda, Contra Costa County, referencing corners and filing Corner Records under B&P Code §8771 before hillside road, utility, and slide-repair work disturbs them.

Monument Preservation in Orinda: Local Conditions

Orinda gave its name to the Orinda Formation — the weak siltstone and claystone that underlies much of the town and hosts its well-known slow-moving landslides. That geology drives a steady program of slide repairs, retaining walls, roadway reconstruction, and drainage work along Orinda’s winding semi-rural roads, and nearly every one of those projects excavates ground where survey monuments sit. California Business and Professions Code §8771 requires that monuments threatened by construction be referenced by a licensed land surveyor before the work begins, with a Corner Record filed with the Contra Costa County Surveyor, and that they be reset and documented again once construction is complete. On Orinda’s large-lot, mid-century cut-slope subdivisions, monuments are widely spaced — losing one pipe on a curving hillside road can leave the nearest surviving control a long way off, and the retracement survey to restore that corner costs far more than preserving it would have.

Creep in the Orinda Formation adds a second layer: monuments on moving slopes are slowly dragged off their record positions. Preservation records are how the evidence survives — our pre-construction ties and filed Corner Records fix where each monument stood on a known date, so a corner later disturbed by a slide repair or a wall footing can be re-established from documented positions rather than reconstructed from scratch. Where a project involves an active slope, we supplement conventional ties with Trimble terrestrial laser scanning: one setup captures the monument and its full surroundings — pavement edges, wall faces, fences, culverts — at survey-grade density, giving contractors and the county a complete, dated point-cloud snapshot without repeat mobilizations to a constrained hillside road.

We serve contractors, utility districts, and public agencies working anywhere in Orinda, from the downtown corridor split by Highway 24 and BART to the semi-rural edges. Every assignment includes the complete §8771 sequence: monument search and referencing, pre-construction Corner Record filings with the Contra Costa County Surveyor, and post-construction resets with closing filings.

Full service details, process, and deliverables: Monument Preservation for Construction · All surveying in Orinda: Orinda land surveying

What's Included

Business & Professions Code §8771 compliance
Corner Records filed before and after construction
Reference ties set outside the disturbance zone
Protects contractors and agencies from retracement liability
Fast mobilization to keep construction schedules moving
Serving contractors, cities, and utility districts

Our Process

Monument Search

We research record maps and locate every monument within the construction disturbance zone — street centerline monuments, property corners, and benchmarks.

Reference Ties & Corner Records

Each monument is tied to durable reference points outside the work area, and pre-construction Corner Records are filed with the county surveyor.

Construction Proceeds

Your project grades, paves, or trenches without monument liability. We remain available if unexpected monuments are uncovered during the work.

Reset & Final Filing

After construction we reset the monuments from the reference ties and file post-construction Corner Records, completing the statutory record.

Monument Preservation in Orinda: FAQ

Yes, if the excavation, grading, or wall construction will disturb a survey monument — the statute applies to construction generally, not just public road work. Property corners often sit exactly where slide-repair keyways and retaining-wall footings are dug. We reference the monuments and file Corner Records with the Contra Costa County Surveyor before the contractor mobilizes, then reset afterward.

Orinda’s curving mid-century subdivisions have long block frontages and sparse surviving monumentation, so retracing a lost corner means extended searches, record research, and often a filed map. On Orinda Formation slopes, creep can also throw nearby evidence into question. Referencing and resetting under §8771 typically costs a small fraction of that retracement effort.

That is one of their main values here. A Corner Record and coordinate ties document a monument’s position on a specific date, creating a baseline that separates landslide displacement from the record boundary location. For chronically moving slopes we can add periodic monitoring so displacement is measured rather than argued about later.

Monument Preservation Across the East Bay

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