US Bridges

N3100 (eastern) over Harrison Creek

Poor

Oklahoma County, Oklahoma · .4S of NE 136th · Structure no. 074820000000000

Built
1940
85 years old
Condition
Poor
inspected August 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
4,800
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

N3100 (eastern) over Harrison Creek is a concrete culvert carrying N3100 (eastern) over Harrison Creek in Oklahoma County, Oklahoma. It was built in 1940, so it is 85 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 3 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.

It carries about 4,800 vehicles a day, roughly 7% of them trucks, projected to reach 7,680 by 2042. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesN3100 (eastern)
CrossesHarrison Creek
Location.4S of NE 136th
RouteCity Street N3100
CountyOklahoma County
StateOklahoma
Coordinates35.60319, -97.47837
Functional classUrban Minor Arterial

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
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,800 (2022)
Projected traffic7,680 by 2042
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3100 (eastern) over Harrison Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is N3100 (eastern) over Harrison 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 N3100 (eastern) over Harrison Creek carry?

About 4,800 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is N3100 (eastern) over Harrison Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns N3100 (eastern) over Harrison Creek?

It is owned by the City or Municipal Highway Agency.