Carrier profile · USDOT 2160346 · Updated Jun 13, 2026
ROCK SPRING CONTRACTING LLC
16 power unitsavg 6.8 yrRegional · 3 statesKENSINGTON, MD94/100
AUTHORITY STATUS UNKNOWN
Equipment
Haulable capacity (power units only — trailers are towed context), equipment mix, and the VIN-decoded unit roster. Click any VIN to trace that unit across every carrier that has run it.
Capacity· power units = haulable capacity; trailers are towed
- Registered power units (MCS-150)
- 16
- Observed power (24 mo)
- 10
- Trailers (towed)
- 0
Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.
Fleet age· model years · decoded VINs
Average age
2026
Newest model yr
2014
Oldest model yr
70.0%
VINs decoded
Unit roster· VIN-decoded from inspections · NHTSA vPIC
| VIN | Type | Year | Make | Model | Insp. | Last seen |
|---|---|---|---|---|---|---|
| JHHRDM2H7HK004128 | Truck | 2017 | HINO | XJC720 / XFC720 | 4 | Jan 14, 2026 |
| 1HTKHPVK3LH272538 | Incomplete - Chassis Cab (Single Cab) | 2020 | GM | GM515 | 3 | Jan 8, 2026 |
| 1FDWE3FL1EDA33888 | Incomplete - Cutaway | 2014 | FORD | E-350 | 3 | Dec 22, 2025 |
| 1M2AX04CXHM036783 | Truck | 2017 | MACK | GU (Granite) | 3 | Dec 4, 2025 |
| 54DK6S1F0TSA00576 | Power unit | 2026 | ISUZU | — | 2 | Jul 10, 2026 |
| 1M2GR2GC7KM010757 | Truck | 2019 | MACK | Granite | 2 | Dec 22, 2025 |
| 5PVNJ8JM4K4S51005 | Incomplete - Chassis Cab (Single Cab) | 2019 | HINO | Conventional Type Truck | 2 | May 30, 2025 |
| 1M2AX04C9JM038711 | Power unit | 2018 | MACK | — | 1 | Jun 15, 2026 |
| 1FDNF6AN6SDF03427 | Power unit | 2025 | FORD | — | 1 | Apr 17, 2026 |
| 5PVNJ8JV9H4S65662 | Incomplete - Chassis Cab (Single Cab) | 2017 | HINO | Conventional Type Truck | 1 | Nov 25, 2025 |
Showing 10 · most-inspected first.