US Bridges

E1820 over Santag Creek

Fair

Cotton County, Oklahoma · 1N 7.7W JCT SH 5/ SH277 · Structure no. 291780000000000

Built
2010
15 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

E1820 over Santag Creek is a concrete culvert carrying E1820 over Santag Creek in Cotton County, Oklahoma. It was built in 2010, so it is 15 years old, younger 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.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 22 ft (6.7 m) long and 42 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

No coordinates are recorded for this structure.

CarriesE1820
CrossesSantag Creek
Location1N 7.7W JCT SH 5/ SH277
RouteCounty Highway E1820
CountyCotton County
StateOklahoma
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span10 ft (2.9 m)
Deck width42 ft (12.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$300,000
NavigationNo navigation control on waterway

Frequently asked questions

When was E1820 over Santag Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is E1820 over Santag Creek 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 June 2023.

How much traffic does E1820 over Santag Creek carry?

About 100 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is E1820 over Santag Creek?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (2.9 m) and a deck 42 ft wide.

Who owns E1820 over Santag Creek?

It is owned by the County Highway Agency.