GTI Companies, Inc.
Spear Fish, SD 57783
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Our Story
GTI has been serving businesses in Minnesota, the Dakotas, Wisconsin, Iowa and Nebraska for more than 12 years. We provide complete geothermal heating and air conditioning systems for nearly any need. We also offer excavation and pipeline construction, as well as new and restorative asphalt paving.
Our main lines of business include: Excavating Contractors, Paving Contractors, Pipeline Contractors, Road Construction--Heavy & Highway, Geothermal Energy Systems.
Commercial Experience
Misc Project
Apartments & Condominiums
Bank
Casinos
Church / Synagogue
Court House
Education (K-12)
Fire / Police Station
Fitness Center
Gas Station
Grocery Stores
Hospital / Nursing Home
Hotel / Motel
House
Jail / Prison
Non-Residential Building
Office Building
Parking Lots
Residential Building
Restaurant
Road / Highway
School / College / University
Utilities
Regions & Counties Serviced
- North and South Dakota
Minnesota 1
- Yellow Medicine
Our CSI Codes
01 53 26 - Temporary Runarounds
01 55 19 - Temporary Parking Areas
01 55 23 - Temporary Roads
03 37 23 - Roller-Compacted Concrete
23 21 13.33 - Ground-Loop Heat-Pump Piping
23 57 33 - Direct Geoexchange Heat Exchangers
23 71 13.16 - Heat-Pump Boosters for Thermal Storage
23 81 43 - Air-Source Unitary Heat Pumps
23 81 46 - Water-Source Unitary Heat Pumps
31 01 10 - Maintenance of Clearing
31 01 20 - Maintenance of Earth Moving
31 01 50 - Maintenance of Excavation Support and Protection
31 06 10 - Schedules for Clearing
31 06 20 - Schedules for Earth Moving
31 11 00.00.01 - Clearing and Grubbing
31 12 00.00.01 - Selective Clearing
31 14 13 - Soil Stripping and Stockpiling
31 14 13.13 - Soil Stripping
31 14 13.16 - Soil Stockpiling
31 14 16 - Sod Stripping and Stockpiling
31 14 16.13 - Sod Stripping
31 14 16.16 - Sod Stockpiling
31 20 00.00.01 - Earth Moving
31 22 13 - Rough Grading
31 22 16 - Fine Grading
31 22 16.13 - Roadway Subgrade Reshaping
31 22 19 - Finish Grading
31 22 19.13 - Spreading and Grading Topsoil
31 23 16 - Excavation
31 23 16.13 - Trenching
31 23 16.16 - Structural Excavation for Minor Structures
31 23 16.26 - Rock Removal
31 23 33 - Trenching and Backfilling
34 01 13 - Operation and Maintenance of Roadways
34 01 43 - Operation and Maintenance of Bridges
34 05 13 - Common Work Results for Roadways
34 05 43 - Common Work Results for Bridges
34 06 13 - Schedules for Roadways
34 06 43 - Schedules for Bridges
35 41 16 - Levee Cutoff Trenches
48 16 13 - Geothermal Energy Heat Pumps
48 16 16 - Geothermal Energy Condensers
48 16 19 - Geothermal Energy Steam Turbines
