US Bridges

Mckenzie Hill RD over Unnamed Creek

Fair

Comanche County, Oklahoma · Fort Sill Army Post · Structure no. DAPTRASIL0PB102

Built
1945
80 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
32 ft
2 main spans
Daily traffic
50
2024 count
Owner
Federal
Army

About this bridge

Mckenzie Hill RD over Unnamed Creek is a concrete culvert carrying Mckenzie Hill RD over Unnamed Creek in Comanche County, Oklahoma. It was built in 1945, so it is 80 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 50 vehicles a day, roughly 1% of them trucks, projected to reach 70 by 2046. The structure is 32 ft (9.7 m) long. If it were closed, the detour would be 16.2 mi (26 km).

CarriesMckenzie Hill RD
CrossesUnnamed Creek
LocationFort Sill Army Post
Coordinates34.65253, -98.58842
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 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
Waterway adequacy6: Equal to present minimum 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 length32 ft (9.7 m)
Longest span15 ft (4.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic70 by 2046
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed16.2 mi (26 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 Mckenzie Hill RD over Unnamed Creek built?

It was built in 1945, making it 80 years old in 2025.

What condition is Mckenzie Hill 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 Mckenzie Hill RD over Unnamed Creek carry?

About 50 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Mckenzie Hill RD over Unnamed Creek?

The structure is 32 ft (9.7 m) long with a longest span of 15 ft (4.6 m).

Who owns Mckenzie Hill RD over Unnamed Creek?

It is owned by the Army.