US Bridges

N3520 over Camp Creek

PoorPosted for load

Pawnee County, Oklahoma · 4.3E 3.1S of Pawnee · Structure no. 012200000000000

Built
1921
104 years old
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
135 ft
3 main spans
Daily traffic
75
2022 count
Owner
County
County Highway Agency

About this bridge

N3520 over Camp Creek is a steel stringer/multi-beam or girder carrying N3520 over Camp Creek in Pawnee County, Oklahoma. It was built in 1921, so it is 104 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 75 vehicles a day, roughly 10% of them trucks, projected to reach 120 by 2042. The structure is 135 ft (41.1 m) long and 17 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesN3520
CrossesCamp Creek
Location4.3E 3.1S of Pawnee
RouteCounty Highway N3520
Coordinates36.29328, -96.72866
Functional classRural Local

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.3 US tons
Inventory rating19.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length135 ft (41.1 m)
Longest span80 ft (24.4 m)
Deck width17 ft (5.3 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic120 by 2042
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$596,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3520 over Camp Creek built?

It was built in 1921, making it 104 years old in 2025.

What condition is N3520 over Camp 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 July 2023.

How much traffic does N3520 over Camp Creek carry?

About 75 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3520 over Camp Creek?

The structure is 135 ft (41.1 m) long with a longest span of 80 ft (24.4 m) and a deck 17 ft wide.

Who owns N3520 over Camp Creek?

It is owned by the County Highway Agency.