US Bridges

FM 521 over Cashs Creek

Fair

Matagorda County, Texas · 1.15 MI E of SH 35 · Structure no. 131580084603013

Built
1961
64 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
121 ft
4 main spans
Daily traffic
795
2023 count
Owner
State
State Highway Agency

About this bridge

FM 521 over Cashs Creek is a concrete stringer/multi-beam or girder carrying FM 521 over Cashs Creek in Matagorda County, Texas. It was built in 1961, so it is 64 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 795 vehicles a day, roughly 12% of them trucks, projected to reach 1,002 by 2042. The structure is 121 ft (36.9 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesFM 521
CrossesCashs Creek
Location1.15 MI E of SH 35
RouteState Highway 521
StateTexas
Coordinates28.78896, -96.19229
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadOther
Structure length121 ft (36.9 m)
Longest span30 ft (9.1 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic795 (2023)
Projected traffic1,002 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 521 over Cashs Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is FM 521 over Cashs 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 November 2024.

How much traffic does FM 521 over Cashs Creek carry?

About 795 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is FM 521 over Cashs Creek?

The structure is 121 ft (36.9 m) long with a longest span of 30 ft (9.1 m) and a deck 31 ft wide.

Who owns FM 521 over Cashs Creek?

It is owned by the State Highway Agency.