US Bridges

FM 977 over Mustang Creek

Fair

Leon County, Texas · 1.05 MI E of SH 75 · Structure no. 171450114703010

Built
1953
72 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
88 ft
1 main span
Daily traffic
498
2020 count
Owner
State
State Highway Agency

About this bridge

FM 977 over Mustang Creek is a steel stringer/multi-beam or girder carrying FM 977 over Mustang Creek in Leon County, Texas. It was built in 1953, so it is 72 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.

It carries about 498 vehicles a day, roughly 18% of them trucks, projected to reach 1,000 by 2033. The structure is 88 ft (26.8 m) long and 25 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesFM 977
CrossesMustang Creek
Location1.05 MI E of SH 75
RouteState Highway 977
CountyLeon County
StateTexas
Coordinates31.15268, -95.95173
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadOther
Structure length88 ft (26.8 m)
Longest span38 ft (11.6 m)
Deck width25 ft (7.7 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic498 (2020)
Projected traffic1,000 by 2033
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
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 FM 977 over Mustang Creek built?

It was built in 1953, making it 72 years old in 2025.

What condition is FM 977 over Mustang Creek 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 February 2023.

How much traffic does FM 977 over Mustang Creek carry?

About 498 vehicles per day (2020 count), of which roughly 18% are trucks.

How long is FM 977 over Mustang Creek?

The structure is 88 ft (26.8 m) long with a longest span of 38 ft (11.6 m) and a deck 25 ft wide.

Who owns FM 977 over Mustang Creek?

It is owned by the State Highway Agency.