TIM MAASSEN
USDOT 1126016 · Doing business as WEST ROCK CONSTRUCTION INC
Active, interstate carrier, small fleet (9 power units) — no FMCSA safety rating on record (common).
Vetting summary
At a glance
- Out-of-service rate100% vs 19.1% national avg
These signals summarize the records shown below — they are a starting point for your own checks, not a judgment of the carrier.
Registration
Carrier identity
| USDOT Number | 1126016 |
|---|---|
| MC Number | — |
| Legal Name | TIM MAASSEN |
| DBA Name | WEST ROCK CONSTRUCTION INC |
| Entity Type | — |
| Phone | 7129822007 |
| Address | 3616 CHESTNUT AVE, Rock Valley, IA, 51247 |
Status
Authority & safety
| Operating Status | Active |
|---|---|
| Operation Type | Interstate |
| Safety Rating | None on record — most carriers have not received a formal FMCSA safety rating. |
| Hazmat Flag | false |
Safety ratings: S = Satisfactory, C = Conditional, U = Unsatisfactory. A carrier with no rating has not been through a full FMCSA compliance review — this is common and not itself a red flag.
Our scoring
Safety scores
| Unsafe Driving | 79 / 100 |
|---|---|
| Hours-of-Service Compliance | 0 / 100 |
| Driver Fitness | 96 / 100 |
| Controlled Substances & Alcohol | 0 / 100 |
| Vehicle Maintenance | 98 / 100 |
Scores are 0-100 rankings computed by us from public FMCSA inspection measures; higher = worse relative to peers. Not official CSA/BASIC percentiles. How these scores are computed.
Safety events
Inspections & crashes (last 24 months)
| Inspections | 4 |
|---|---|
| Out-of-Service Rate | 100% vs 19.1% national average |
Most frequent violation categories: 20 (9), 16 (6), 29 (4).
Crash involvement does not imply fault. FMCSA crash records list all reportable crashes involving a carrier, regardless of who caused them.
Equipment
Fleet & operations
| Power Units (trucks) | 9 |
|---|---|
| Drivers | 7 |
| Recent Annual Mileage | 10,000 |
| Last MCS-150 Filing | 17-MAR-26 |
TIM MAASSEN operates 9 power units — a larger fleet than 94% of carriers registered in IA.
Nearby
Other carriers in Rock Valley, IA
- LOREN GROENEWEG — USDOT 1401701, 10 power units
- EAST VALLEY FARM — USDOT 1139961, 7 power units
- WINDING MEADOWS DAIRY INC — USDOT 1622298, 5 power units
- SIOUXLAND FABRICATING INC — USDOT 1390121, 4 power units
- VALLEY FEED & SEED INC — USDOT 1525279, 4 power units
Browse all carriers in Rock Valley, IA or all IA carriers.