US Bridges

S.H. 59B over Drainage Ditch

Good

Garvin County, Oklahoma · 2.4 MI N E JCT SH 19 · Structure no. 138310000000000

Built
1957
68 years old, rebuilt 2024
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
141 ft
3 main spans
Daily traffic
1,800
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 59B over Drainage Ditch is a steel stringer/multi-beam or girder carrying S.H. 59B over Drainage Ditch in Garvin County, Oklahoma. It was built in 1957 and reconstructed in 2024, so it is 68 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,800 vehicles a day, roughly 15% of them trucks, projected to reach 2,880 by 2042. The structure is 141 ft (43 m) long and 31 ft wide. If it were closed, the detour would be 28 mi (45 km).

Location

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CarriesS.H. 59B
CrossesDrainage Ditch
Location2.4 MI N E JCT SH 19
RouteState Highway 59B
CountyGarvin County
StateOklahoma
Coordinates34.85485, -97.56389
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating86.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length141 ft (43 m)
Longest span60 ft (18.3 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2022)
Projected traffic2,880 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 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. 59B over Drainage Ditch built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2024.

What condition is S.H. 59B over Drainage Ditch 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 February 2023.

How much traffic does S.H. 59B over Drainage Ditch carry?

About 1,800 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 59B over Drainage Ditch?

The structure is 141 ft (43 m) long with a longest span of 60 ft (18.3 m) and a deck 31 ft wide.

Who owns S.H. 59B over Drainage Ditch?

It is owned by the State Highway Agency.