Rock Solid Materials INC (USDOT 4578373)
MonitorFindings
Fleet size on file is not corroborated by any inspection in our 24-month roadside record
Active for less than 6 months, limited vetting history
Entity is registered as both a carrier and a broker.
- DOT number
- USDOT 4578373
- Docket (MC) number
- MC1822101
- Operating authority
- Common carrier authority: active; Broker authority: active.
- Authority granted
- May 5, 2026
- Insurance on file
- Liability (BIPD) insurance on file for $750,000.
- Safety rating
- No published safety rating
- Fleet on file
- 29 power units, 58 drivers
- Operation type
- Interstate
- Physical address
- 1001 WILLIAMS RD, GENOA CITY, WI 53128
- MCS-150 last filed
- May 2026
Frequently asked questions
What carrier is DOT 4578373?
DOT 4578373 (USDOT 4578373) is Rock Solid Materials INC, an interstate motor carrier.
What carrier is MC 1822101?
MC 1822101 is the docket number of Rock Solid Materials INC, USDOT 4578373.
What is Rock Solid Materials INC's MC number?
Rock Solid Materials INC's docket number is MC 1822101. Its USDOT number is 4578373.
Is Rock Solid Materials INC currently authorized to operate?
Common carrier authority: active; Broker authority: active. Source: FMCSA registration and licensing records.
Does Rock Solid Materials INC have insurance on file with FMCSA?
Liability (BIPD) insurance on file for $750,000.
Who provides Rock Solid Materials INC's insurance?
Rock Solid Materials INC's liability insurance is filed with FMCSA by Zurich American Insurance Company.
How long has Rock Solid Materials INC been in business?
Rock Solid Materials INC's operating authority was first granted in 2026. FMCSA records show authority age, which can differ from how long the company has existed.
What is Rock Solid Materials INC's safety record?
FMCSA records show no vehicle inspections for Rock Solid Materials INC in the last 24 months, so there is no out-of-service rate. FMCSA records also show 0 recordable crashes in the same window.
What is Rock Solid Materials INC's CSA score?
FMCSA does not publish a single CSA score for carriers. Rock Solid Materials INC's public safety data includes its roadside inspection out-of-service rates and crash record, listed on this page.
What is Rock Solid Materials INC's FMCSA safety rating?
Rock Solid Materials INC has no published FMCSA safety rating. Most US carriers have never received a rating review, so an unrated carrier is the common case, not a warning sign by itself.
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Reconstructed from cached and fleetfax-ingested FMCSA public records, so it may be out of date. Records loaded Sep 19, 2026. Verify current status on FMCSA SAFER. fleetfax surfaces the facts; brokers make the judgment. FMCSA status