US Bridges

S.H. 28 over Grand Lake W. Spillway

FairPosted for load

Mayes County, Oklahoma · 16.3 E of JCT U.S. 69 · Structure no. 296420000000000

Built
1940
85 years old
Condition
Fair
inspected November 2023
Type
Girder and Floorbeam System
Concrete
Length
451 ft
11 main spans
Daily traffic
2,400
2022 count
Owner
Local
Other Local Agency

About this bridge

S.H. 28 over Grand Lake W. Spillway is a concrete girder and floorbeam system carrying S.H. 28 over Grand Lake W. Spillway 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 2,400 vehicles a day, roughly 15% of them trucks, projected to reach 3,840 by 2042. The structure is 451 ft (137.5 m) long and 29 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

Location

Open in Google Maps
CarriesS.H. 28
CrossesGrand Lake W. Spillway
Location16.3 E of JCT U.S. 69
RouteState Highway 28
CountyMayes County
StateOklahoma
Coordinates36.48058, -95.0115
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
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
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating0 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialConcrete
DeckConcrete, cast-in-place
Main spans11
Design loadH 15
Structure length451 ft (137.5 m)
Longest span41 ft (12.5 m)
Deck width29 ft (8.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2022)
Projected traffic3,840 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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 28 over Grand Lake W. Spillway built?

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

What condition is S.H. 28 over Grand Lake W. Spillway 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 Grand Lake W. Spillway carry?

About 2,400 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 28 over Grand Lake W. Spillway?

The structure is 451 ft (137.5 m) long with a longest span of 41 ft (12.5 m) and a deck 29 ft wide.

Who owns S.H. 28 over Grand Lake W. Spillway?

It is owned by the Other Local Agency.