US Bridges

N3630 over Little Hilliby Creek

FairClosed to traffic

Okfuskee County, Oklahoma · 4.6 S .8 E Paden · Structure no. 049710000000000

Built
1936
89 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
72 ft
6 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N3630 over Little Hilliby Creek is a concrete slab carrying N3630 over Little Hilliby Creek in Okfuskee County, Oklahoma. It was built in 1936, so it is 89 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: closed to all traffic.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 72 ft (21.9 m) long and 21 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesN3630
CrossesLittle Hilliby Creek
Location4.6 S .8 E Paden
RouteCounty Highway N3630
Coordinates35.5729, -96.54797
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
Deck7 GoodSome minor problems.
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; scour above top of footing
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadUnknown
Structure length72 ft (21.9 m)
Longest span12 ft (3.7 m)
Deck width21 ft (6.4 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$426,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3630 over Little Hilliby Creek built?

It was built in 1936, making it 89 years old in 2025.

What condition is N3630 over Little Hilliby 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 August 2024.

How much traffic does N3630 over Little Hilliby Creek carry?

About 100 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3630 over Little Hilliby Creek?

The structure is 72 ft (21.9 m) long with a longest span of 12 ft (3.7 m) and a deck 21 ft wide.

Who owns N3630 over Little Hilliby Creek?

It is owned by the County Highway Agency.