Tri-State Generation & Transmission Association Inc
Westminster, Colorado · Carrier number 180139
295
power units
295
power units
Tri-State Generation & Transmission Association Inc is a freight carrier based in Westminster, Colorado with 295 power units and 180 drivers as reported, the 1,921st largest trucking fleet in the US and the 36th largest in Colorado. In the 24 months to Sep 30, 2026 it had 1 reportable crashes (0.34 per 100 power units vs 2.98 for all carriers).
Updated Oct 11, 2026 · crashes and inspections to Sep 30, 2026
Power units
295
#36 in CO
Drivers
180
165 with commercial license
Crashes, 24 mo
1
0 fatal
Per 100 trucks
0.34
All carriers: 2.98
Vehicles out of service
0.0%
All inspections: 22.8%
Inspections, 24 mo
23
83% with no violation
Compared with other carriers
Crash rate over 24 months per 100 power units, and the share of roadside inspections that took the vehicle or driver off the road
| Crashes / 100 trucks | Vehicles OOS | Drivers OOS | |
|---|---|---|---|
| Tri-State Generation & Transmission Association Inc | 0.34 | 0.0% | 0.0% |
| Carriers with 10+ trucks in CO | 1.27 | 19.6% | 3.9% |
| Carriers with 10+ trucks, US | 2.98 | 19.3% | 3.6% |
| All roadside inspections | - | 22.8% | 6.4% |
Lower is better. Carriers that drive more miles per truck can have more crashes per truck.
Crashes, 24 months
0 people killed and 1 injured
- Fatal0
- Injury1
- Tow-away0
Roadside inspections, 24 months
Inspections and how many ended out of service
| Kind | Inspections | Out of service | Rate |
|---|---|---|---|
| Driver | 23 | 0 | 0.0% |
| Vehicle | 14 | 0 | 0.0% |
Carrier facts
- Carrier number
- 180139
- Based in
- Westminster, Colorado
- Registered
- Jun 1, 1974
- Operation
- Across state lines
- Carries
- Freight
- Authority for hire
- None
- Safety rating
- Satisfactory (May 24, 1988)
- Miles driven
- 3.86 million (2024)
- Type
- Private property
- Cargo
- Building materials, Construction, General freight, Liquids gases, Logs poles, Machinery, Motor vehicles, Oilfield equipment
- Last update filed
- Aug 27, 2025
Questions and answers
How many trucks does Tri-State Generation & Transmission Association Inc have?
Tri-State Generation & Transmission Association Inc reports 295 power units (trucks, tractors and buses) and 180 drivers, 165 of them with a commercial license. That is the 1,921st largest fleet among US trucking carriers. Its trucks drove 3.86 million miles in 2024.
Is Tri-State Generation & Transmission Association Inc a safe carrier?
In 24 months Tri-State Generation & Transmission Association Inc had 1 reportable crashes, 0.34 per 100 power units (below the 2.98 of all carriers with 10+ trucks). 0.0% of its vehicle inspections took the truck off the road (all inspections: 22.8%). Its latest official safety rating is Satisfactory (May 24, 1988). A crash record does not say who caused the crash.
Reportable crashes of trucks and buses: a death, an injury or a vehicle towed away. A crash record does not say who caused the crash. Recent months can still grow as late reports arrive. Out-of-service rate: the percent of roadside inspections that took the driver or the vehicle off the road until a serious problem was fixed. Carriers with few inspections have rates that swing a lot. Fleet, drivers and miles as the carrier reported them. Official public data, updated daily.