US Bridges

FM 2917 over Mustang Bayou

Fair

Brazoria County, Texas · 8.16 MI E of SH 35 · Structure no. 120200293802001

Built
1967
58 years old, rebuilt 1993
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
173 ft
5 main spans
Daily traffic
3,708
2020 count
Owner
State
State Highway Agency

About this bridge

FM 2917 over Mustang Bayou is a concrete stringer/multi-beam or girder carrying FM 2917 over Mustang Bayou in Brazoria County, Texas. It was built in 1967 and reconstructed in 1993, so it is 58 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 6 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 3,708 vehicles a day, roughly 10% of them trucks, projected to reach 3,690 by 2033. The structure is 173 ft (52.6 m) long and 48 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesFM 2917
CrossesMustang Bayou
Location8.16 MI E of SH 35
RouteState Highway 2917
CountyBrazoria County
StateTexas
Coordinates29.26188, -95.18222
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length173 ft (52.6 m)
Longest span34 ft (10.4 m)
Deck width48 ft (14.6 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,708 (2020)
Projected traffic3,690 by 2033
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 2917 over Mustang Bayou built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1993.

What condition is FM 2917 over Mustang Bayou 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 November 2024.

How much traffic does FM 2917 over Mustang Bayou carry?

About 3,708 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is FM 2917 over Mustang Bayou?

The structure is 173 ft (52.6 m) long with a longest span of 34 ft (10.4 m) and a deck 48 ft wide.

Who owns FM 2917 over Mustang Bayou?

It is owned by the State Highway Agency.