US Bridges

N4020 over Horsepen Creek

PoorPosted for load

Tulsa County, Oklahoma · 113th Str .3 S. 166 ST N. · Structure no. 103130000000000

Built
1945
80 years old
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
72 ft
3 main spans
Daily traffic
1,471
2024 count
Owner
County
County Highway Agency

About this bridge

N4020 over Horsepen Creek is a concrete stringer/multi-beam or girder carrying N4020 over Horsepen Creek in Tulsa 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 1,471 vehicles a day, roughly 15% of them trucks, projected to reach 2,354 by 2044. The structure is 72 ft (21.9 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesN4020
CrossesHorsepen Creek
Location113th Str .3 S. 166 ST N.
RouteCounty Highway N4020
Coordinates36.39015, -95.84811
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating29 US tons
Inventory rating17 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length72 ft (21.9 m)
Longest span30 ft (9.1 m)
Deck width25 ft (7.7 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,471 (2024)
Projected traffic2,354 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$426,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4020 over Horsepen Creek built?

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

What condition is N4020 over Horsepen Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does N4020 over Horsepen Creek carry?

About 1,471 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is N4020 over Horsepen Creek?

The structure is 72 ft (21.9 m) long with a longest span of 30 ft (9.1 m) and a deck 25 ft wide.

Who owns N4020 over Horsepen Creek?

It is owned by the County Highway Agency.