Wolf Line Construction Company is an active interstate carrier based in Castle Rock, WA.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 71 | 72 | 0 |
| Trailers | 97 | 0 | 0 |
| Total Power Units | 143 | ||
Distinct vehicles · 24 mo
vs 143 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category | Insp w/ Viol |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 51% | 88% | Around peer average |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 64% | 94% | Around peer average |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 0% | 0% | Better than most peers |
Lower percentile = lower SMS measure = stronger safety record. Computed nightly across active carriers in the same state and fleet-size band.
| Type | Inspections | OOS | OOS % | Nat'l Avg |
|---|---|---|---|---|
| Driver | 0 | 0 | — | 6.67% |
| Vehicle | 0 | 0 | — | 22.26% |
| Hazmat | 0 | 0 | — | 4.44% |
Where they run
Inspected in 2 states. Top state accounts for of activity.
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| Jan 1, 2026 | 0 | 1 | 0 | 1 |
| Jan 1, 2025 | 1 | 1 | 2 | 2 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Driver Fitness | 1 | 0 | 0 |
| Unsafe Driving | 1 | 1 | 0 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Mar 9, 2026 | MI | STRAIGHT TRUCK | 1 | 0 |
| Nov 4, 2025 | MI | TRUCK TRACTOR | 0 | 0 |
| Aug 6, 2025 | MI | STRAIGHT TRUCK | 0 | 0 |
| Jul 30, 2025 | MI | STRAIGHT TRUCK | 0 | 0 |
| Aug 5, 2024 |
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 1 | 0.17 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 0 | 0.00 | — |
| Driver Fitness | 1 | 0.08 | — |
| Controlled Substances | 0 | 0.00 | — |
| IL |
| STRAIGHT TRUCK |
| 0 |
| 0 |
| Jul 24, 2024 | MI | STRAIGHT TRUCK | 1 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Mar 9, 2026 | 3922SLLS3 | State/Local Laws - Speeding 11-14 miles per hour over the speed limit | Unsafe Driving | — |
| Jul 24, 2024 | 39141A | Operating a property-carrying vehicle without a valid medical certificate in possession or on file with the state drivers licensing agency. History of either fail | Driver Fitness | — |