Cargo carriedBuilding materials / construction, Other
MCS-150 mileage18,500 mi (2026)
Phone (on file)(435) 245-6081
Sources: census record as of October 19, 2026; authority and insurance from FMCSA L&I, checked October 4, 2026; inspections and crashes from FMCSA SMS, checked October 4, 2026.
Quick answer
Mountain Fiber Insulation INC is an interstate motor carrier in Hyrum, Utah (USDOT 709174) with no for-hire authority on file (typical for private/intrastate carriers) and a self-reported fleet of 3 power units.
Key takeaways
USDOT 709174 is registered to Mountain Fiber Insulation INC, an interstate carrier based in Hyrum, UT.
No FMCSA operating authority on file. Interstate for-hire carriers need it; private carriers and intrastate-only carriers generally do not.
Self-reported fleet size: 3 power units and 2 drivers (FMCSA MCS-150 self-report; sanitized for plausibility).
Registered cargo types include building materials / construction, other.
Source: FMCSA Safety Measurement System, roadside inspections and crashes over a ~24-month window, checked October 4, 2026. An out-of-service rate is the share of inspections in which a vehicle or driver was placed out of service. With few inspections, one result moves the rate a lot. FMCSA crash records include crashes regardless of fault. None of these figures is a safety rating. The official Satisfactory/Conditional/Unsatisfactory safety rating is issued separately. See SAFER.
About Mountain Fiber Insulation INC
Mountain Fiber Insulation INC is an interstate motor carrier based in Hyrum, Utah, registered with the FMCSA under USDOT 709174. It has no for-hire operating authority on file, which is typical for a private or intrastate carrier. The carrier self-reports a fleet of 3 power units and 2 drivers. Registered cargo includes building materials / construction, other. Its most recent MCS-150 filing reported 18,500 mi (2026).
Before you work with this carrier
Confirm the safety rating. Authority and insurance are shown or linked above. Open the SAFER snapshot for the official safety rating and out-of-service status.
Verify insurance is current. Coverage on file can lapse; confirm active BIPD/cargo before tendering a load.
Match authority to the work. For-hire loads need active operating authority. A USDOT number alone isn't enough.