Tetra Tech Inc (DOT# 616131) – FMCSA Carrier Profile
DOT# 616131● Active
Updated monthly · 2026-03-09
This carrier is active with no crashes on record.
Tetra Tech Inc is a registered motor carrier with the FMCSA under USDOT number 616131. The company operates from Pasadena, CA and maintains an active operating status with 6 power units and 13 drivers on record.
Safety Rating
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Company Information
Address3475 E Foothill Blvd, Pasadena, CA, 91107
Phone(801) 330-7967
Entity TypeOther-Environmental Engineering
OperationInterstate
Power Units6(Small carrier)
Drivers13
MCS-150 FiledJanuary 12, 2026
Annual Mileage130 mi (2026)
Inspection Summary
All-time Inspections
All-time8
Total
4
OOS
0
Driver OOS
4
Vehicle OOS
8 inspections — relatively low volume, which may indicate a smaller or newer carrier.
The out-of-service (OOS) rate represents the percentage of inspections that resulted in the carrier being placed out of service. 50.0% — above the national vehicle OOS average of ~21%. Review BASICS scores below.
Crash History
✅No crashes reported (FMCSA data)
BASICS Safety Scores
BASICS Scores
Higher = more risk · FMCSA Behavior Analysis and Safety Improvement Categories0.7
Unsafe Driving
Measures violations related to speeding, reckless driving, and improper lane changes.
0.0
HOS Compliance
Tracks hours-of-service violations, including driving beyond legal limits without rest.
0.0
Driver Fitness
Reflects issues with driver qualifications, licenses, and medical certifications.
0.0
Controlled Substances
Captures drug and alcohol violations, including failed or refused tests.
7.4
Vehicle Maintenance
Reflects brake, tire, lighting, and other equipment-related inspection violations.
Scores above 65 (general freight) or 50 (passenger/hazmat) trigger an FMCSA Alert. Higher scores indicate more safety risk. National median is approximately 20–30 for active carriers.
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Frequently Asked Questions
What is USDOT Number 616131?
USDOT number 616131 is assigned to Tetra Tech Inc, an active motor carrier registered with the FMCSA, based in Pasadena, CA.
How many inspections has Tetra Tech Inc had?
Tetra Tech Inc has recorded 8 total inspections with 4 out-of-service orders, representing an OOS rate of 50.00%.
Where is Tetra Tech Inc located?
Tetra Tech Inc is headquartered at 3475 E Foothill Blvd, Pasadena, CA 91107.
What does "Not Rated" mean?
"Not Rated" means the FMCSA has not conducted a formal compliance review for this carrier. It does not indicate a safety problem — many active carriers operate without a formal rating.
Is zero crashes always a good sign?
Generally yes, but context matters. A carrier with zero crashes and very few inspections may simply have limited road exposure. Always review crash data alongside inspection volume and fleet size.
What is a normal OOS rate?
The national average vehicle out-of-service rate is approximately 21%. Driver OOS averages around 5%. Rates significantly above these thresholds may indicate recurring compliance issues.
How often is FMCSA data updated?
FMCSA publishes updated carrier data monthly. This page reflects the most recent available snapshot, updated on the date shown above.
Data sourced from the FMCSA Open Data Portal. Updated monthly. DOT# 616131 · Last updated: 2026-03-09. View official FMCSA record →