Carrier profile · USDOT 330443 · Updated Sep 6, 2026
GRR Transportation Services Inc
1 power unitavg 9.5 yrLocal · 1 statesSUMTER, SC50/100
AUTHORITY STATUS UNKNOWNRATED SATISFACTORYHAZMAT
Network & Fraud
Reincarnation chains, shared-VIN links, common domains and officers, and owner-group affiliations — the chameleon / double-broker signals that name-and-USDOT lookups miss.
Shares a registration email domain with other carriers
@heidelbergmaterials.com — 12 carriers: USDOT 109226USDOT 554236USDOT 605674USDOT 829417USDOT 856034USDOT 1133825USDOT 1603351USDOT 1977251
Shares a company officer with other carriers
stephen holt — 3 carriers: USDOT 2858791USDOT 3240794
Capacity consistency· registered vs roadside-observed power units
Registered (MCS-150)11
Observed (24 mo)11
Registered and roadside-observed capacity are broadly consistent.
Owner / group view· confidence: email domain + officer
Owner / group view
Affiliated authorities
Collapses 14 related authorities · joined by email domain + officer
- Authorities
- 14
- Combined power
- 1,182
- States
- 9
- Oldest authority
- Jun 1, 1974
- Active now
- 12
- GRR TRANSPORTATION SERVICES INC· viewingUSDOT 3304431PU
- HM SEFA TRANSPORTATION LLCUSDOT 605674257PU
- HEIDELBERG MATERIALS NORTHEAST LLCUSDOT 109226240PU
- HM SOUTH TEXAS CONCRETE LLCUSDOT 1982621139PU
- HEIDELBERG MATERIALS SOUTHEAST AGG LLCUSDOT 829417136PU
- HEIDELBERG MATERIALS NORTHEAST-NY LLCUSDOT 554236123PU
- HEIDELBERG MATERIALS NORTHEAST LLCUSDOT 197725191PU
- CARVER SAND & GRAVEL LLCUSDOT 113382572PU
- HM PACIFIC NORTHWEST INCUSDOT 303076053PU
- HEIDELBERG MATERIALS TDPS LLCUSDOT 432817627PU
- HEIDELBERG MATERIALS MIDWEST AGG INCUSDOT 160335122PU
- COMMERCIAL AGGREGATES TRANSPORTATION & SALES LLCUSDOT 85603415PU
- STEPHEN HOLTUSDOT 32407944PU
- CEDAR RIDGE FOREST PRODUCTSUSDOT 28587912PU