US Bridges

N4637 (0138C) over Malloy Hollow Creek

FairPosted for load

Adair County, Oklahoma · 4.1S 2.7E of SH 100 · Structure no. 137290000000000

Built
1957
68 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
550
2022 count
Owner
County
County Highway Agency

About this bridge

N4637 (0138C) over Malloy Hollow Creek is a steel stringer/multi-beam or girder carrying N4637 (0138C) over Malloy Hollow Creek in Adair County, Oklahoma. It was built in 1957, so it is 68 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 550 vehicles a day, roughly 15% of them trucks, projected to reach 880 by 2042. The structure is 42 ft (12.8 m) long and 26 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesN4637 (0138C)
CrossesMalloy Hollow Creek
Location4.1S 2.7E of SH 100
RouteCounty Highway N4637
CountyAdair County
StateOklahoma
Coordinates35.70336, -94.75995
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.6 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span37 ft (11.3 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic550 (2022)
Projected traffic880 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$319,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4637 (0138C) over Malloy Hollow Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is N4637 (0138C) over Malloy Hollow 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 2023.

How much traffic does N4637 (0138C) over Malloy Hollow Creek carry?

About 550 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N4637 (0138C) over Malloy Hollow Creek?

The structure is 42 ft (12.8 m) long with a longest span of 37 ft (11.3 m) and a deck 26 ft wide.

Who owns N4637 (0138C) over Malloy Hollow Creek?

It is owned by the County Highway Agency.