US Bridges

South Boundary RD over Unnamed Creek

Fair

Comanche County, Oklahoma · Fort Sill Army Post · Structure no. DAPTRASIL000001

Built
1943
82 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
200
2024 count
Owner
Federal
Army

About this bridge

South Boundary RD over Unnamed Creek is a concrete culvert carrying South Boundary RD over Unnamed Creek in Comanche County, Oklahoma. It was built in 1943, so it is 82 years old, older 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 200 vehicles a day, roughly 10% of them trucks, projected to reach 200 by 2046. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 5 mi (8 km).

CarriesSouth Boundary RD
CrossesUnnamed Creek
LocationFort Sill Army Post
Coordinates34.63843, -98.43955
Functional classRural 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 protection8 Very GoodNo problems noted.
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2024)
Projected traffic200 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 South Boundary RD over Unnamed Creek built?

It was built in 1943, making it 82 years old in 2025.

What condition is South Boundary RD over Unnamed 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 South Boundary RD over Unnamed Creek carry?

About 200 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is South Boundary RD over Unnamed Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns South Boundary RD over Unnamed Creek?

It is owned by the Army.