US Bridges

FM512 over Onstott Crk

FairPosted for load

Hunt County, Texas · 7.9 MI S JCT SH34&FM512 · Structure no. 011170057902004

Built
1948
77 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
23 ft
5 main spans
Daily traffic
252
2020 count
Owner
State
State Highway Agency

About this bridge

FM512 over Onstott Crk is a concrete culvert carrying FM512 over Onstott Crk in Hunt County, Texas. It was built in 1948, so it is 77 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 252 vehicles a day, roughly 5% of them trucks, projected to reach 370 by 2033. The structure is 23 ft (7 m) long and 29 ft wide.

Location

Open in Google Maps
CarriesFM512
CrossesOnstott Crk
Location7.9 MI S JCT SH34&FM512
RouteState Highway 512
CountyHunt County
StateTexas
Coordinates33.28673, -96.01641
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour evaluation has not been made
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadUnknown
Structure length23 ft (7 m)
Longest span4 ft (1.2 m)
Deck width29 ft (8.8 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deck0 ft (0 m)

Traffic and service

Average daily traffic252 (2020)
Projected traffic370 by 2033
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM512 over Onstott Crk built?

It was built in 1948, making it 77 years old in 2025.

What condition is FM512 over Onstott Crk in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does FM512 over Onstott Crk carry?

About 252 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is FM512 over Onstott Crk?

The structure is 23 ft (7 m) long with a longest span of 4 ft (1.2 m) and a deck 29 ft wide.

Who owns FM512 over Onstott Crk?

It is owned by the State Highway Agency.