US Bridges

U.S. 56 over Drainage Canal Boisecity

Fair

Cimarron County, Oklahoma · .55S of Jct. US287 · Structure no. 125940000000000

Built
1951
74 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
46 ft
3 main spans
Daily traffic
4,000
2022 count
Owner
State
State Highway Agency

About this bridge

U.S. 56 over Drainage Canal Boisecity is a concrete culvert carrying U.S. 56 over Drainage Canal Boisecity in Cimarron County, Oklahoma. It was built in 1951, so it is 74 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 4,000 vehicles a day, roughly 25% of them trucks, projected to reach 6,400 by 2042. The structure is 46 ft (14 m) long and 40 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesU.S. 56
CrossesDrainage Canal Boisecity
Location.55S of Jct. US287
RouteU.S. Route 56
CountyCimarron County
StateOklahoma
Coordinates36.72151, -102.51372
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.5 US tons
Inventory rating33.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length46 ft (14 m)
Longest span14 ft (4.3 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2022)
Projected traffic6,400 by 2042
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$644,000
NavigationNo navigation control on waterway

Frequently asked questions

When was U.S. 56 over Drainage Canal Boisecity built?

It was built in 1951, making it 74 years old in 2025.

What condition is U.S. 56 over Drainage Canal Boisecity 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 October 2024.

How much traffic does U.S. 56 over Drainage Canal Boisecity carry?

About 4,000 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is U.S. 56 over Drainage Canal Boisecity?

The structure is 46 ft (14 m) long with a longest span of 14 ft (4.3 m) and a deck 40 ft wide.

Who owns U.S. 56 over Drainage Canal Boisecity?

It is owned by the State Highway Agency.