US Bridges

S.H. 28 over Pensacola Dam

FairPosted for load

Mayes County, Oklahoma · Pensacola Dam @grand Lake · Structure no. 275690000000000

Built
1940
85 years old
Condition
Fair
inspected November 2023
Type
Arch - Deck
Concrete
Length
5,596 ft
51 main spans
Daily traffic
3,000
2022 count
Owner
Local
Other Local Agency

About this bridge

S.H. 28 over Pensacola Dam is a concrete arch - deck carrying S.H. 28 over Pensacola Dam in Mayes 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 3,000 vehicles a day, roughly 15% of them trucks, projected to reach 4,800 by 2042. The structure is 5,596 ft (1,705.7 m) long and 29 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

Location

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CarriesS.H. 28
CrossesPensacola Dam
LocationPensacola Dam @grand Lake
RouteState Highway 28
CountyMayes County
StateOklahoma
Coordinates36.46806, -95.04174
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating0 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans51 (+32 approach)
Design loadH 15
Structure length5,596 ft (1,705.7 m)
Longest span61 ft (18.7 m)
Deck width29 ft (8.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2022)
Projected traffic4,800 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.2 mi (47 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$6.8 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 28 over Pensacola Dam built?

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

What condition is S.H. 28 over Pensacola Dam in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.

How much traffic does S.H. 28 over Pensacola Dam carry?

About 3,000 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 28 over Pensacola Dam?

The structure is 5,596 ft (1,705.7 m) long with a longest span of 61 ft (18.7 m) and a deck 29 ft wide.

Who owns S.H. 28 over Pensacola Dam?

It is owned by the Other Local Agency.