GEOTECHNICAL DRILLING PROJECTS

When choosing a geotechnical drilling company to complete your geotechnical project, be sure to choose one with the kind of experience and reputation that Cascade Drilling has earned. This is a sampling of the hundreds of high-profile projects we’ve successfully completed for our clients.

Advanced Earth Sciences
Location	Value	Rig Types
JWPCP Tunnel Project-Carson, California	$400,000	Mud rotary
Description: Drill, sample and install 3 vibrating piezometers up to 325’ using mud rotary and coring techniques. Additional borings included 4 up to 420’ rotary wash/HQ3 core holes. Sampling included obtaining continuous cores through unconsolidated overburden with Geo Core samplers as well as SPT, Ring and Shelby tubes. HQ3 cores were obtained in bedrock formations

CAMP, DRESSER, MCKEE
Location	Value	Rig Types
Brightwater, King County, Washington	$2,000,000
Description: Drill, sample and install 200 wells to depths of up to 600’ using mud rotary, 134mm wireline core, sonic and auger methods. Drill site setups and cleanup within residential areas included total containment berms, traffic signs, and barricades.

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HARBOR FORCEMAIN
Location	Value	Rig Types
City of Los Angeles, California	$500,000	Mud rotary, specialized
Description: Tunnel Boring Machine (TBM) pre-shaft drilling for design purposes. Mud rotary drilling to install 185- 3” freeze wall pipes to 150' depths. Completions required being within 1% of vertical. Specialized tooling and drilling techniques were used to complete project within acceptable tolerances and within 4-month time period.

BEGESON-BOESE
Location	Value	Rig Types
Detroit Lake, Oregon	$50,000	CME 850 tracke rig
Description: Emergency Response to a 10,000-gallon gasoline tanker spill. HQ wireline triple tube coring services to evaluate fractured bedrock materials. CME 850 track rig and portable pontoons were used for remote access along lake shore. Rock coring of weathered basalt to install 2” wells.

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GREENS CREEK MINE
Location	Value	Rig Types
Admiralty Island, Alaska	$600,000	CME 850 tracke rig, helicopter
Description: Remote access drilling with CME 850 and helicopter delivery of limited access drill rig. Geotechnical and environmental drilling conducted to depths of 250-feet using hollow-stem auger, mud rotary and diamond coring methods.

HAYWARD BAKER
Location	Value	Rig Types
CSO Project, Portland, Oregon	$425,000	Air rotary
Description: 13, 1" diameter air rotary predrilling borings in the difficult Troutdale formation to install 10” PVC liner for jet grouting at 2 tunnel manholes. Project completed ahead of schedule.

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ROY F. WESTON
Location	Value	Rig Types
Lucky Lass Mine, Lakeview, Oregon	$430,000	Multiple
Description: Multiple rigs employed to enhance project schedule. Air rotary, drill and drive, and ODEX, were used to install multiple monitoring wells up to 400' depth through alluvium, tailings, and fractured basalt. Auger drilling with truck and ATV mounted CME drill rigs.

LANDAU ASSOCIATES
Location	Value	Rig Types
Portland, Oregon	$100,000	Limited access over water
Description: Over-water barge work with limited access drill rig. Completed sediment sampling in settling ponds to depths of 40'. Cascade used a continuous sampling system with 5' long core barrels (3 1/4" ID sampler) to provide sufficient sample volume for sediment analysis. The continuous sampling system used provided sample orientation and directional trends of fractures in extremely soft soils.

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