Headquartered in Sacramento, the Office of Drilling Services (ODS) is organized and ready to provide service statewide to our primary clients, the Geotechnical Services (GS) design groups and through them to the various offices and divisions of the Department. ODS has equipment staged in multiple areas around the state for quick response in emergency situations, and has regular training for the various requirements of safety, maintenance, and water quality issues throughout the state. ODS has drilling staff with many years of varied experience in both the government and private sectors, organized with Leadworkers for solving problems in the field, and Senior Drillers available to provide field support for more difficult or complex problems. Additionally, the Senior Drillers are available for consultation such as assisting with the oversight of consultant contractors and providing construction support with many years of drilling expertise.
About half of the fleet of equipment is geared for drilling shallow borings, 50 to 150 feet through pavement for geotechnical sampling and in-situ testing under existing highways. Additional specialized equipment is available to drill in remote areas from all-terrain or track mounted rigs, or from barges on waterways, and anywhere with limited access, as well as drilling deeper to about 1,000 feet. ODS has the tooling required to provide a variety of services, ranging from pushing small samplers through soft clay, to conventional drilling and sampling in a variety of soils, as well as coring through hard rock. Thus ODS is prepared for the geological complexity typical of the State of California.
SENIOR FOUNDATION DRILLERS
Office of Drilling Services Services Available
- Drilling methods including wireline (94 mm), Auger, conventional open hole, and drive or push systems.
- Boring depths ranging from 20 to 1,000 ft or so.
- Boring diameters from 4 to 10 inches.
- Core diameters from about 1.5 to 2.5 inches.
- Soil sample diameters from 1 to 3 ¾ inches.
- Soil sample types including punchcore, SPT, Shelby tubes, Lexan tubes, and both 2 or 2 ½ inch brass tubes.
- Instrument installations including slope inclinometer casing, TDR cable, and Piezometers.
- Monument setting.
- Borehole abandonment.
- Subsurface investigation support for other specialties such as research, archeology, seismic, corrosion, storm water and construction.
Office of Drilling Services Equipment
Fleet Drill Rigs
- Six trailer mounted used for our regular work, generally shallow boreholes through pavement.
- Two truck mounted 4x4 two axle used for most types of drilling.
- Four large truck mounted three axle used for deeper / harder boreholes with limited access.
- Three all terrain– one rubber tired and two track mounted for difficult sites.
- Three small drill rigs used for limited access with a crane or helicopter.
Fleet Drill Tenders (deployed with rigs for supplying water, tools and other drilling supplies)
- Six large truck mounted three axle
- Five truck mounted two axle 4x4
- Various trucks and trailers for transport of supplies, equipment and personnel.
- Small pontoon barge – 18 by 45 feet.
- Limited access equipment such as whackers, Minuteman, etc.
- Climbing equipment.
- Various others available by special request through outside sources.
Last Updated March 16, 2006
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