US Bridges

SH 36 over Duncan Creek

Fair

Comanche County, Texas · 2.85 MI SE of FM 589 · Structure no. 230470018202001

Built
1938
87 years old, rebuilt 1982
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
31 ft
4 main spans
Daily traffic
2,540
2019 count
Owner
State
State Highway Agency

About this bridge

SH 36 over Duncan Creek is a concrete culvert carrying SH 36 over Duncan Creek in Comanche County, Texas. It was built in 1938 and reconstructed in 1982, 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 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 2,540 vehicles a day, roughly 26% of them trucks, projected to reach 3,790 by 2033. The structure is 31 ft (9.4 m) long and 88 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSH 36
CrossesDuncan Creek
Location2.85 MI SE of FM 589
RouteState Highway 36
CountyComanche County
StateTexas
Coordinates31.92932, -98.64526
Functional classRural Minor Arterial

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 inspectionAugust 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
DeckNot applicable
Main spans4
Design loadH 15
Structure length31 ft (9.4 m)
Longest span7 ft (2.1 m)
Deck width88 ft (26.7 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,540 (2019)
Projected traffic3,790 by 2033
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 SH 36 over Duncan Creek built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1982.

What condition is SH 36 over Duncan 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 August 2023.

How much traffic does SH 36 over Duncan Creek carry?

About 2,540 vehicles per day (2019 count), of which roughly 26% are trucks.

How long is SH 36 over Duncan Creek?

The structure is 31 ft (9.4 m) long with a longest span of 7 ft (2.1 m) and a deck 88 ft wide.

Who owns SH 36 over Duncan Creek?

It is owned by the State Highway Agency.