Welcome to Thelen Associates, Inc.

Geotechnology, Inc. Announces Major Expansion with the Acquisition of Thelen Associates

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THELENís Drill Personnel are trained and fully qualified to operate any of THELENís equipment. The experience of our Drill Operators ranges from one (1) to twenty four (24) years. THELEN Drill Personnel have completed the 40 hour Hazardous Waste OSHA Training in accordance with CFR 1910.210. Annual 8 hour OSHA refresher courses are also completed by THELEN Drill Personnel.







THELEN Drilling Equipment:

Nine (9) Drill Rigs:

  • Four (4) - Truck-Mounted Drill Rigs
    • Two (2) - Mobile B-57s
    • Two (2) - Mobile B-53s
  • Three (3) - Track-Mounted Drill Rigs
    • CME 45C
    • Two (2) - CME 55s
  • One (1) - Skid-Mounted Drill Rig
    • CME 45
  • One (1) - Flotation Tire Buggy-Mounted Drill Rig
  • CME 55

Support Equipment:

  • John Deere 450 Dozer
  • Wells Cargo 18í Enclosed Environmental Supply Trailer, equipped with a 500 gallon water tank, Llanda 30221 steam cleaner for decontamination of tools, grout pump and all necessary well materials
  • 2 - Tandem and Single-axle Rollback Trucks
  • 6 - F250 Pickup Trucks
  • 1 - F350 Pickup Truck
  • 2 - Water Trucks - 1400 and 1235 Gallon
  • Water Tanks - Portable 250-375 Gallon

Other Capabilities & Equipment:

  • Monitoring Well & Piezometer Installation
  • Level B, C, and D Environmental Drilling
  • Rock Coring - NX, NQ, NQ2, NW, HQ, & PQ
  • Slope Inclinometer Installation
  • Pressure Testing / Pump Tests / Packers
  • Hollow Stem Augers, 2.25" to 8.25" Diameter
  • Continuous Flight Augers, 5" Diameter
  • Shelby Tubes, 3" & 5" Diameter
  • Split Spoons, 2" & 3" Diameter
  • Laskey Samplers
  • Water Infiltration Testing


About THELEN | Geotechnical Engineering | Construction Materials Testing | Drilling
Accreditations | Representative Projects | Professional Memberships | Projects
Employment Opportunities | Contact Us | Home Page
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