US Bridges

E1730 over East Cow Creek

Good

Stephens County, Oklahoma · 2.3E .5N of Duncan · Structure no. 321710000000000

Built
2020
5 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
135 ft
3 main spans
Daily traffic
500
2022 count
Owner
County
County Highway Agency

About this bridge

E1730 over East Cow Creek is a prestressed concrete stringer/multi-beam or girder carrying E1730 over East Cow Creek in Stephens County, Oklahoma. It was built in 2020, so it is 5 years old, younger 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 500 vehicles a day, roughly 15% of them trucks, projected to reach 800 by 2042. The structure is 135 ft (41.1 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesE1730
CrossesEast Cow Creek
Location2.3E .5N of Duncan
RouteCounty Highway E1730
Coordinates34.50694, -97.91833
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating41 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length135 ft (41.1 m)
Longest span75 ft (22.9 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2022)
Projected traffic800 by 2042
Trucks15%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was E1730 over East Cow Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is E1730 over East Cow 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 June 2024.

How much traffic does E1730 over East Cow Creek carry?

About 500 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is E1730 over East Cow Creek?

The structure is 135 ft (41.1 m) long with a longest span of 75 ft (22.9 m) and a deck 34 ft wide.

Who owns E1730 over East Cow Creek?

It is owned by the County Highway Agency.