US Bridges

FM 108 over Cottonwood Creek

Fair

Gonzales County, Texas · 6.10 MI S of US 87 · Structure no. 130900071502016

Built
1951
74 years old, rebuilt 2021
Condition
Fair
inspected February 2023
Type
Culvert
Concrete
Length
27 ft
4 main spans
Daily traffic
1,668
2019 count
Owner
State
State Highway Agency

About this bridge

FM 108 over Cottonwood Creek is a concrete culvert carrying FM 108 over Cottonwood Creek in Gonzales County, Texas. It was built in 1951 and reconstructed in 2021, 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 1,668 vehicles a day, roughly 10% of them trucks, projected to reach 2,030 by 2033. The structure is 27 ft (8.2 m) long and 50 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesFM 108
CrossesCottonwood Creek
Location6.10 MI S of US 87
RouteState Highway 108
CountyGonzales County
StateTexas
Coordinates29.1841, -97.61271
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
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 alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadOther
Structure length27 ft (8.2 m)
Longest span6 ft (1.8 m)
Deck width50 ft (15.2 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,668 (2019)
Projected traffic2,030 by 2033
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 108 over Cottonwood Creek built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 2021.

What condition is FM 108 over Cottonwood 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 February 2023.

How much traffic does FM 108 over Cottonwood Creek carry?

About 1,668 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is FM 108 over Cottonwood Creek?

The structure is 27 ft (8.2 m) long with a longest span of 6 ft (1.8 m) and a deck 50 ft wide.

Who owns FM 108 over Cottonwood Creek?

It is owned by the State Highway Agency.