US Bridges

FM 109 over West Mill Creek

Fair

Austin County, Texas · 4.30 MI S of FM 2502 · Structure no. 130080071601014

Built
1951
74 years old, rebuilt 1995
Condition
Fair
inspected December 2023
Type
Slab
Concrete
Length
150 ft
6 main spans
Daily traffic
2,323
2022 count
Owner
State
State Highway Agency

About this bridge

FM 109 over West Mill Creek is a concrete slab carrying FM 109 over West Mill Creek in Austin County, Texas. It was built in 1951 and reconstructed in 1995, so it is 74 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 2,323 vehicles a day, roughly 13% of them trucks, projected to reach 2,881 by 2042. The structure is 150 ft (45.7 m) long and 42 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesFM 109
CrossesWest Mill Creek
Location4.30 MI S of FM 2502
RouteState Highway 109
CountyAustin County
StateTexas
Coordinates29.98213, -96.50004
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
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 adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadOther
Structure length150 ft (45.7 m)
Longest span25 ft (7.6 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,323 (2022)
Projected traffic2,881 by 2042
Trucks13%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$15,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 109 over West Mill Creek built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1995.

What condition is FM 109 over West Mill 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 December 2023.

How much traffic does FM 109 over West Mill Creek carry?

About 2,323 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is FM 109 over West Mill Creek?

The structure is 150 ft (45.7 m) long with a longest span of 25 ft (7.6 m) and a deck 42 ft wide.

Who owns FM 109 over West Mill Creek?

It is owned by the State Highway Agency.