US Bridges

Service Road over Sitting Bear Creek

Fair

Comanche County, Oklahoma · Fort Sill Army Post · Structure no. DAPTRASIL000039

Built
2010
15 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
50
2024 count
Owner
Federal
Army

About this bridge

Service Road over Sitting Bear Creek is a concrete culvert carrying Service Road over Sitting Bear Creek in Comanche County, Oklahoma. It was built in 2010, so it is 15 years old, younger than the Oklahoma average of 47.8 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 50 by 2046. The structure is 30 ft (9.1 m) long and 25 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesService Road
CrossesSitting Bear Creek
LocationFort Sill Army Post
Coordinates34.66913, -98.41425
Functional classUrban Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span14 ft (4.4 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic50 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerArmy
Maintained byArmy
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Service Road over Sitting Bear Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is Service Road over Sitting Bear 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 July 2024.

How much traffic does Service Road over Sitting Bear Creek carry?

About 50 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Service Road over Sitting Bear Creek?

The structure is 30 ft (9.1 m) long with a longest span of 14 ft (4.4 m) and a deck 25 ft wide.

Who owns Service Road over Sitting Bear Creek?

It is owned by the Army.