US Bridges

SH 36 over Flat Creek

Fair

Austin County, Texas · 4.45 MI S of FM 3013 · Structure no. 130080018704011

Built
1925
100 years old, rebuilt 2018
Condition
Fair
inspected January 2023
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
4,840
2018 count
Owner
State
State Highway Agency

About this bridge

SH 36 over Flat Creek is a concrete culvert carrying SH 36 over Flat Creek in Austin County, Texas. It was built in 1925 and reconstructed in 2018, so it is 100 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 4,840 vehicles a day, roughly 12% of them trucks, projected to reach 6,780 by 2038. The structure is 33 ft (10.1 m) long and 58 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSH 36
CrossesFlat Creek
Location4.45 MI S of FM 3013
RouteState Highway 36
CountyAustin County
StateTexas
Coordinates29.68648, -96.12967
Functional classRural Principal Arterial - Other

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 inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum 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 spans3
Design loadH 15
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width58 ft (17.8 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,840 (2018)
Projected traffic6,780 by 2038
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

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 SH 36 over Flat Creek built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 2018.

What condition is SH 36 over Flat 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 January 2023.

How much traffic does SH 36 over Flat Creek carry?

About 4,840 vehicles per day (2018 count), of which roughly 12% are trucks.

How long is SH 36 over Flat Creek?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m) and a deck 58 ft wide.

Who owns SH 36 over Flat Creek?

It is owned by the State Highway Agency.