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VALIDATED

PORTER'S DIESEL SERVICE INC

Trust Score

Excellent Why this score?

Company CheckPORTER'S DIESEL SERVICE INC · DOT 512728

109 HINSDALE ROAD, WINCHESTER, NH, 03470

DOT# 512728 MC# 215104 Winchester, New Hampshire 36 years

CARRIER

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3

Power Units

2

Drivers

0

Crashes (24-Month)

$1,000,000

Insurance

Not Rated

Safety Rating

0

Inspections

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Company Information

Legal NamePORTER'S DIESEL SERVICE INC

DOT Number512728

MC Number215104

Entity TypeCarrier

Operating StatusA - Active

LocationWinchester, New Hampshire

Added02/12/1993

MCS-15002/17/2026

Contact Details

PhoneSign in to view

EmailSign in to view

Physical Address109 HINSDALE ROAD, WINCHESTER, NH, 03470

Mailing AddressPO BOX 151, WINCHESTER, NH, 03470

Operating Authorities

Authority TypeAUTHORIZED FOR HIRE

Carrier OperationA - Interstate

DocketMC215104

CommonActive

ContractNot Active

BrokerNot Active

Operating36 years

Operation Classification

Authorized For Hire

SMS BASIC Scores

FMCSA safety categories, last 24 months. Above Cutoff = FMCSA flags a problem · Below cutoff = within limits · Clean = no violations.

Unsafe Driving

measure 0 · 0 insp with violations

Clean

Hours-of-Service Compliance

measure 0 · 0 insp with violations

Clean

Driver Fitness

measure 0 · 0 insp with violations

Clean

Controlled Substances / Alcohol

measure 0 · 0 insp with violations

Clean

Vehicle Maintenance

measure 0 · 0 insp with violations

Clean

Source: FMCSA SMS, updated monthly.

Mileage

Annual Mileage26,419 miles

Mileage Year2023

VMT SourceMCS-150 Form

Drivers

2

Interstate

0

Intrastate

0

CDL

2

Total

Interstate >100mi0

Interstate <100mi0

Intrastate >100mi0

Intrastate <100mi0

Equipment

No equipment breakdown on file with FMCSA.

HazMatYes

Safety Summary

Safety RatingNot Rated

Total Crashes (24-mo)0

Fatal0

Driver OOS0.0% avg 5.5%

Vehicle OOS0.0% avg 20.7%

SmartWay PartnerNo

Insurance

Amount$1,000,000

Type91X

Effective10/13/2025

CompanyUNION INSURANCE CO.

Policy #CPA 5651320

Last checked10/24/2026

Quick Facts

StatusActive

TypeCarrier

Fleet3 units

Drivers2

Mileage26,419 mi

Operating36 years

MCS-15002/2026

Safety & Inspection Data

Crash Summary

Total Crashes (24-mo)0

Fatal0

Injury0

Tow-Away0

Driver Inspections

Total0

Out of Service0

OOS Rate0.0%

National Avg5.5%

Vehicle Inspections

Total0

Out of Service0

OOS Rate0.0%

National Avg20.7%

Licensing & Insurance

Form	Type	Insurance Company	Policy	Coverage	Effective	Cancel Date	Method
91X	BIPD/Primary	ONEBEACON AMERICA INSURANCE COMPANY	CMR390179	$750,000	10/31/1993	10/13/1997	Replaced
34	CARGO	ONEBEACON AMERICA INSURANCE COMPANY	CMR006846	$0	10/31/1989	10/12/1997	Cancelled
91X	BIPD/Primary	DONEGAL MUTUAL INSURANCE COMPANY	1000232441	$1,000,000	10/13/2024	10/13/2025	Cancelled
91X	BIPD/Primary	THE PENINSULA INSURANCE COMPANY	GPM9018717	$1,000,000	10/13/2020	10/13/2024	Replaced
91X	BIPD/Primary	THE PENINSULA INSURANCE COMPANY	GPM9018717	$1,000,000	10/13/2020	11/29/2024	Cancelled
91X	BIPD/Primary	ACADIA INSURANCE COMPANY	CPA 0035570 AN	$1,000,000	10/13/2011	09/28/2011	Replaced
91X	BIPD/Primary	ACADIA INSURANCE COMPANY	CPA 0035570	$1,000,000	10/13/2011	09/28/2011	Replaced
91X	BIPD/Primary	ACADIA INSURANCE COMPANY	CPA 0035570	$750,000	10/13/2003	03/25/2009	Replaced
91X	BIPD/Primary	AMERICAN AUTOMOBILE INSURANCE COMPANY	CPA 1500504	$750,000	10/13/1997	10/13/2003	Replaced
91X	BIPD/Primary	ACADIA INSURANCE COMPANY	CPA0035570	$750,000	10/13/1997	10/13/1997	Replaced
34	CARGO	ACADIA INSURANCE COMPANY	CPA-0035570	$0	10/13/1997	10/17/2014	Cancelled
91X	BIPD/Primary	ACADIA INSURANCE COMPANY	CPA 0035570 AN	$1,000,000	09/28/2011	09/28/2011	Replaced
91X	BIPD/Primary	ACADIA INSURANCE COMPANY	CPA 0035570 AN	$1,000,000	09/28/2011	10/13/2020	Replaced
91X	BIPD/Primary	ACADIA INSURANCE COMPANY	CPA 0035570 AN	$750,000	07/07/2011	09/28/2011	Replaced
91X	BIPD/Primary	UNION INSURANCE CO.	CPA 0035570 AN	$1,000,000	03/25/2009	07/07/2011	Replaced

No active insurance policies.

Docket	Type	Action	Served	Disposition	Disp Date
MC215104	MOTOR PROPERTY COMMON CARRIER	GRANTED	11/24/1989	-	-
MC215104	COMMON	INVOLUNTARY REVOCATION	11/14/2005	DISCONTINUED REVOCATION	11/23/2005
MC215104	COMMON	INVOLUNTARY REVOCATION	11/07/1997	DISCONTINUED REVOCATION	11/20/1997
MC215104	COMMON	INVOLUNTARY REVOCATION	04/29/2021	DISCONTINUED REVOCATION	06/08/2021

No revocation records.

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100/100

Excellent

VERIFIED

Every carrier starts at 100. We subtract points for each missing requirement or risk factor below. Verified means all four core requirements pass.

Score breakdown

100, no deductions

Clean record, the bar stays full at 100.

Verification, 4 core requirements

Active operating authority

FMCSA shows the USDOT registration and authority are active.

Authorized for hire

Holds active for-hire (common or contract) authority.

Active insurance on file

Insurance coverage and carrier are on file with FMCSA.

Safety rating not Unsatisfactory

No Unsatisfactory rating on file.

What's lowering this score

Clean record, no deductions. This carrier starts and stays at 100.

How we calculate the Trust Score

Every company starts at 100

We subtract points for each missing requirement or risk factor. Verified means all the core requirements for that company's type pass. Nothing is added back, the score is a deduction model built only on public FMCSA data. No pay-to-play, no opinions.

Requirements differ by company type

Each company is judged fairly on its own FMCSA obligations. Anything that doesn't apply shows as a grey N/A, not required, never a penalty.

Carrier (for-hire)

Operating authority, authorized-for-hire, insurance on file, safety rating.

Broker

Broker authority + $75k surety bond (BMC-84/85). MCS-150 not required (no fleet).

Freight forwarder

FF authority + $75k bond + BOC-3. MCS-150 not required (no trucks).

Private carrier

Active USDOT + MCS-150 + safety. No operating authority / for-hire / insurance filing required (hauls its own goods).

Crashes are scaled, not flat

Crash history is proportional. We don't apply a flat penalty, we scale it to (a) crashes per vehicle in the fleet and (b) the share of those crashes that were fatal. So a big, safe fleet barely moves; a small fleet with many (and fatal) crashes takes a large hit.

0 pts deductedscaled by rate & severityup to −28 pts

Low end

50,000 vehicles + 1 crash → ~0 pts. A huge fleet with very few crashes per vehicle is almost untouched.

High end

5 vehicles + 3 crashes incl. fatal → large deduction (near the −28 cap). Many crashes per truck, fatal-heavy.

Mechanics: deduction is capped at 28 points, weighted roughly 60% on crashes-per-vehicle and 40% on the fatal ratio. Zero crashes = zero deduction. If fleet size is unknown, only crash severity can move the score (conservative).

Out-of-service rate vs. the national average

Driver and vehicle out-of-service rates are measured against the FMCSA national average, not a flat number. A company only takes the deduction when it sits above the national benchmark, for example “Vehicle OOS 37% vs national avg 20.7%”.

Point reference, the full menu

Every factor and exactly how many points it can remove. Knockout factors (they also fail Verification) are marked.

Factor	Points
USDOT / authority not active with FMCSA knockout	−25
Missing operating authority (when required) knockout	−15
No insurance or surety bond on file (when required) knockout	−25
Unsatisfactory safety rating knockout	−30
Conditional safety rating	−12
MCS-150 biennial update overdue (carriers)	−10
Crashes, rate-adjusted (per-vehicle & fatal share)	0 to −28
Driver OOS rate above national average	−5
Vehicle OOS rate above national average	−5
Very new carrier (under 1 year)	−10
Limited operating history (1-3 years)	−6
Moderate operating history (3-5 years)	−3
Operating history unknown	−3
No public phone number	−3
No public email address	−2

All inputs come from public FMCSA records (operating authority, insurance/bond filings, the SAFER/SMS safety profile, crash & inspection reports). If FMCSA updates a record, the score updates with it. For the full deduction table, see the methodology page.

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