US Bridges

N3990 over Mayhew Creek

Good

Choctaw County, Oklahoma · 3. W 2.1 N of Boswell · Structure no. 244610000000000

Built
1997
28 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
76 ft
1 main span
Daily traffic
25
2022 count
Owner
County
County Highway Agency

About this bridge

N3990 over Mayhew Creek is a prestressed concrete stringer/multi-beam or girder carrying N3990 over Mayhew Creek in Choctaw County, Oklahoma. It was built in 1997, so it is 28 years old, younger than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25 vehicles a day, roughly 10% of them trucks, projected to reach 40 by 2042. The structure is 76 ft (23.2 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesN3990
CrossesMayhew Creek
Location3. W 2.1 N of Boswell
RouteCounty Highway N3990
Coordinates34.05559, -95.92073
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span73 ft (22.3 m)
Deck width29 ft (8.7 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2022)
Projected traffic40 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$439,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3990 over Mayhew Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is N3990 over Mayhew Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does N3990 over Mayhew Creek carry?

About 25 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3990 over Mayhew Creek?

The structure is 76 ft (23.2 m) long with a longest span of 73 ft (22.3 m) and a deck 29 ft wide.

Who owns N3990 over Mayhew Creek?

It is owned by the County Highway Agency.