US Bridges

S.H. 30 over Grape Creek

Good

Harmon County, Oklahoma · 2.9 MI N JCT S.H. 9 · Structure no. 105470000000000

Built
1946
79 years old, rebuilt 2009
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
136 ft
3 main spans
Daily traffic
210
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 30 over Grape Creek is a steel stringer/multi-beam or girder carrying S.H. 30 over Grape Creek in Harmon County, Oklahoma. It was built in 1946 and reconstructed in 2009, so it is 79 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 210 vehicles a day, roughly 15% of them trucks, projected to reach 336 by 2042. The structure is 136 ft (41.5 m) long and 31 ft wide. If it were closed, the detour would be 67.7 mi (109 km).

Location

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CarriesS.H. 30
CrossesGrape Creek
Location2.9 MI N JCT S.H. 9
RouteState Highway 30
CountyHarmon County
StateOklahoma
Coordinates34.94175, -99.91451
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length136 ft (41.5 m)
Longest span45 ft (13.7 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic210 (2022)
Projected traffic336 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed67.7 mi (109 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$1.7 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 30 over Grape Creek built?

It was built in 1946, making it 79 years old in 2025. It was reconstructed in 2009.

What condition is S.H. 30 over Grape Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does S.H. 30 over Grape Creek carry?

About 210 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 30 over Grape Creek?

The structure is 136 ft (41.5 m) long with a longest span of 45 ft (13.7 m) and a deck 31 ft wide.

Who owns S.H. 30 over Grape Creek?

It is owned by the State Highway Agency.