US Bridges

FM 108 over Rocky Creek

Fair

Gonzales County, Texas · 7.15 MI S of US 87 · Structure no. 130900071502017

Built
1951
74 years old, rebuilt 2014
Condition
Fair
inspected February 2023
Type
Culvert
Concrete
Length
65 ft
6 main spans
Daily traffic
559
2024 count
Owner
State
State Highway Agency

About this bridge

FM 108 over Rocky Creek is a concrete culvert carrying FM 108 over Rocky Creek in Gonzales County, Texas. It was built in 1951 and reconstructed in 2014, 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 559 vehicles a day, roughly 10% of them trucks, projected to reach 2,030 by 2033. The structure is 65 ft (19.8 m) long and 46 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesFM 108
CrossesRocky Creek
Location7.15 MI S of US 87
RouteState Highway 108
CountyGonzales County
StateTexas
Coordinates29.16941, -97.60747
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 protection7 GoodSome minor problems.
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 spans6
Design loadOther
Structure length65 ft (19.8 m)
Longest span10 ft (3 m)
Deck width46 ft (14 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic559 (2024)
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 Rocky Creek built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 2014.

What condition is FM 108 over Rocky 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 Rocky Creek carry?

About 559 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is FM 108 over Rocky Creek?

The structure is 65 ft (19.8 m) long with a longest span of 10 ft (3 m) and a deck 46 ft wide.

Who owns FM 108 over Rocky Creek?

It is owned by the State Highway Agency.