US Bridges

N3820 over Pond Creek

PoorPosted for load

Osage County, Oklahoma · 2.5S.E. Boulangerville · Structure no. 050150000000000

Built
1936
89 years old
Condition
Poor
inspected July 2024
Type
Truss - Thru
Steel
Length
148 ft
1 main span
Daily traffic
75
2022 count
Owner
County
County Highway Agency

About this bridge

N3820 over Pond Creek is a steel truss - thru carrying N3820 over Pond Creek in Osage 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 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 148 ft (45.1 m) long and 18 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesN3820
CrossesPond Creek
Location2.5S.E. Boulangerville
RouteCounty Highway N3820
Coordinates36.92934, -96.18881
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.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating19.1 US tons
Inventory rating11.4 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length148 ft (45.1 m)
Longest span145 ft (44.2 m)
Deck width18 ft (5.4 m)
Roadway width17 ft (5.1 m)
Vertical clearance over deck12 ft (3.8 m)

Traffic and service

Average daily traffic75 (2022)
Projected traffic120 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$668,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3820 over Pond Creek built?

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

What condition is N3820 over Pond 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 2024.

How much traffic does N3820 over Pond Creek carry?

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

How long is N3820 over Pond Creek?

The structure is 148 ft (45.1 m) long with a longest span of 145 ft (44.2 m) and a deck 18 ft wide.

Who owns N3820 over Pond Creek?

It is owned by the County Highway Agency.