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Granite State Gas Transmission Inc (DOT# 3615183) – FMCSA Carrier Profile

doing business as UNITIL
DOT# 3615183● Active
Updated: 2026-03-09

Granite State Gas Transmission Inc is a registered motor carrier with the FMCSA under USDOT number 3615183. The company operates from Portsmouth, NH and maintains an active operating status with 6 power units and 5 drivers on record.

Safety Rating

FMCSA Safety Rating
— Not Rated

No formal safety rating has been assigned to Granite State Gas Transmission Inc by the FMCSA. View official FMCSA record →

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Company Information

Address325 West Rd, Portsmouth, NH, 03801-5638
Phone(603) 294-5153
EmailCANTONEN@UNITIL.COM
Entity TypePrivate Property
OperationInterstate
Power Units6
Drivers5
MCS-150 FiledFebruary 27, 2026
Annual Mileage125,918 mi (2025)
All carriers in New Hampshire→Carriers in Portsmouth, NH→

Inspection Summary

All-time Inspections
All-time
1
Total
0
OOS
0
Driver OOS
0
Vehicle OOS
OOS Rate0.00%
The out-of-service (OOS) rate represents the percentage of inspections that resulted in the carrier being placed out of service.

BASICS Safety Scores

BASICS Scores
Higher = more risk · FMCSA Behavior Analysis and Safety Improvement Categories
0.0
Unsafe Driving
0.0
HOS Compliance
0.0
Driver Fitness
0.0
Controlled Substances
0.0
Vehicle Maintenance
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Frequently Asked Questions

What is USDOT Number 3615183?
USDOT number 3615183 is assigned to Granite State Gas Transmission Inc, an active motor carrier registered with the FMCSA, based in Portsmouth, NH.
How many inspections has Granite State Gas Transmission Inc had?
Granite State Gas Transmission Inc has recorded 1 total inspections with 0 out-of-service orders, representing an OOS rate of 0.00%.
Where is Granite State Gas Transmission Inc located?
Granite State Gas Transmission Inc is headquartered at 325 West Rd, Portsmouth, NH 03801-5638.

Data sourced from the FMCSA Open Data Portal. Updated monthly. DOT# 3615183 · Last updated: 2026-03-09. View official FMCSA record →