US Bridges

FM 1105 over Willis Creek

Fair

Williamson County, Texas · 4.70 MI SW of FM 487 · Structure no. 142460203802007

Built
1956
69 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete
Length
100 ft
4 main spans
Daily traffic
719
2021 count
Owner
State
State Highway Agency

About this bridge

FM 1105 over Willis Creek is a concrete slab carrying FM 1105 over Willis Creek in Williamson County, Texas. It was built in 1956, so it is 69 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 719 vehicles a day, roughly 15% of them trucks, projected to reach 1,007 by 2041. The structure is 100 ft (30.5 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesFM 1105
CrossesWillis Creek
Location4.70 MI SW of FM 487
RouteState Highway 1105
StateTexas
Coordinates30.78326, -97.57791
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadOther
Structure length100 ft (30.5 m)
Longest span25 ft (7.6 m)
Deck width25 ft (7.7 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic719 (2021)
Projected traffic1,007 by 2041
Trucks15%
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 1105 over Willis Creek built?

It was built in 1956, making it 69 years old in 2025.

What condition is FM 1105 over Willis 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 March 2023.

How much traffic does FM 1105 over Willis Creek carry?

About 719 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is FM 1105 over Willis Creek?

The structure is 100 ft (30.5 m) long with a longest span of 25 ft (7.6 m) and a deck 25 ft wide.

Who owns FM 1105 over Willis Creek?

It is owned by the State Highway Agency.