Yosemite National Park · Laser scanning
Happy Isles & Vernal Fall
Topographic survey from the top of Vernal Fall down to Lady Franklin Rock, through Happy Isles and along the road back to Curry Village, captured with a 3D laser scanner.
Services
Recent work
Projects
Twelve projects, from original section corners on remote ranches to mountaintop control, construction layout in Yosemite and an underground decline.
Sierra foothills · Underground
Exploration mine decline
Boundary survey of several hundred acres of private and BLM land and topographic mapping of the ground above. Underground, we set line and grade for the contractor's guidance lasers and deliver updated as-built drawings as the decline advances. It is now approaching 4,000 feet.
Services
Heavy civil · Yosemite
El Portal & Tuolumne Meadows treatment plants
Control and construction layout for a national contractor on two Yosemite wastewater plants, including structural steel and precast buildings, plus deformation monitoring with a 0.005 ft (1/16″) reporting threshold.
High Sierra · Boundary & drone
Across an alpine lake
Forty remote acres in the high Sierra, reached by boat. We recovered the original section corners, solved the boundary, flew a drone topo with a 1-inch orthophoto, set corners and filed a record of survey.
Catalina Island to the Eastern Sierra
Mountaintop communication sites
Boundary, topography and records of survey for utility communication sites on peaks from Catalina Island to the Eastern Sierra, for a long-time engineering client.
Agricultural · ALTA/NSPS
Large-acreage ALTAs
ALTA surveys and records of survey on ranches and farms of 1,000 to 5,000+ acres for institutional agricultural investors, across California.
Services
Yosemite National Park · Design & layout
Bridalveil Fall accessible trails
All of the topographic surveying, mapping and construction layout for the Bridalveil Fall trails and overlooks.
Monterey County · Boundary
Big Sur backcountry
The original 1882 government survey here was fraudulent. We tracked down the corners surveyors set to replace it in the early 1900s, redwood posts in rock mounds, tied them to GNSS control and filed a record of survey.
Services
Boundary · Retracement
1,000-acre ranch, original corners
Original 1800s government section corners recovered across a thousand acres, then intermediate points set along the property lines to guide new fencing.
Services
Yosemite National Park · Federal boundary
Park boundary surveys
Federal boundary work along the Yosemite National Park line, retracing original section surveys and century-old park boundary posts to BLM Manual standards.
Services
Science · Field sites
Ecological observatory field sites
Surveys at long-term ecological research sites from California to Oregon and Virginia, for a national science program.
Legal · Expert witness
Contentious boundary disputes
Expert witness work on complicated boundary cases, where the history, the evidence and the math all have to hold up.
Services
Yosemite's South Entrance · Working statewide
We still love Yosemite. We still work in it.
Our office is in Oakhurst, at the South Entrance to Yosemite National Park, and we've surveyed some of its best-known places. The work also takes us across California, from Sacramento Valley farmland to the high Sierra and Catalina Island.