US Bridges

South Entrance Roa over Unnamed Creek

Poor

Teton County, Wyoming · 0.5 Mi. South of West Thu · Structure no. 1570030P0000000

Built
1972
53 years old
Condition
Poor
inspected September 2024
Type
Tee Beam
Concrete Continuous
Length
145 ft
3 main spans
Daily traffic
1,598
2019 count
Owner
Federal
National Park Service

About this bridge

South Entrance Roa over Unnamed Creek is a concrete continuous tee beam carrying South Entrance Roa over Unnamed Creek in Teton County, Wyoming. It was built in 1972, so it is 53 years old, older than the Wyoming average of 48.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,598 vehicles a day, roughly 1% of them trucks, projected to reach 1,918 by 2039. The structure is 145 ft (44.2 m) long and 36 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesSouth Entrance Roa
CrossesUnnamed Creek
Location0.5 Mi. South of West Thu
RouteFederal Lands Road 14
StateWyoming
Coordinates44.40853, -110.57267
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length145 ft (44.2 m)
Longest span59 ft (17.9 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,598 (2019)
Projected traffic1,918 by 2039
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$530,000 (2036 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was South Entrance Roa over Unnamed Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is South Entrance Roa over Unnamed Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does South Entrance Roa over Unnamed Creek carry?

About 1,598 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is South Entrance Roa over Unnamed Creek?

The structure is 145 ft (44.2 m) long with a longest span of 59 ft (17.9 m) and a deck 36 ft wide.

Who owns South Entrance Roa over Unnamed Creek?

It is owned by the National Park Service.