US Bridges

E0420 over Black Bear Creek

Poor

Pawnee County, Oklahoma · 2.25W 2.25N of Blackburn · Structure no. 245720000000000

Built
1993
32 years old
Condition
Poor
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
213 ft
3 main spans
Daily traffic
35
2022 count
Owner
County
County Highway Agency

About this bridge

E0420 over Black Bear Creek is a prestressed concrete stringer/multi-beam or girder carrying E0420 over Black Bear Creek in Pawnee County, Oklahoma. It was built in 1993, so it is 32 years old, younger 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.

It carries about 35 vehicles a day, roughly 10% of them trucks, projected to reach 56 by 2042. The structure is 213 ft (64.8 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesE0420
CrossesBlack Bear Creek
Location2.25W 2.25N of Blackburn
RouteCounty Highway E0420
Coordinates36.40599, -96.63971
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.1 US tons
Inventory rating44.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length213 ft (64.8 m)
Longest span70 ft (21.3 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2022)
Projected traffic56 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$738,000
NavigationNo navigation control on waterway

Frequently asked questions

When was E0420 over Black Bear Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is E0420 over Black Bear 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 2023.

How much traffic does E0420 over Black Bear Creek carry?

About 35 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is E0420 over Black Bear Creek?

The structure is 213 ft (64.8 m) long with a longest span of 70 ft (21.3 m) and a deck 29 ft wide.

Who owns E0420 over Black Bear Creek?

It is owned by the County Highway Agency.