US Bridges

FM 109 over Spring Branch Creek

Good

Austin County, Texas · 1.25 MI N of FM 1094 · Structure no. 130080071601008

Built
1938
87 years old, rebuilt 1995
Condition
Good
inspected February 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
2,081
2020 count
Owner
State
State Highway Agency

About this bridge

FM 109 over Spring Branch Creek is a concrete culvert carrying FM 109 over Spring Branch Creek in Austin County, Texas. It was built in 1938 and reconstructed in 1995, so it is 87 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,081 vehicles a day, roughly 6% of them trucks, projected to reach 2,930 by 2033. The structure is 21 ft (6.4 m) long and 60 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesFM 109
CrossesSpring Branch Creek
Location1.25 MI N of FM 1094
RouteState Highway 109
CountyAustin County
StateTexas
Coordinates29.90969, -96.48842
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2023
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 alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width60 ft (18.4 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,081 (2020)
Projected traffic2,930 by 2033
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 109 over Spring Branch Creek built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1995.

What condition is FM 109 over Spring Branch Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does FM 109 over Spring Branch Creek carry?

About 2,081 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is FM 109 over Spring Branch Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 60 ft wide.

Who owns FM 109 over Spring Branch Creek?

It is owned by the State Highway Agency.