US Bridges

Grand Loop Road over Otter Creek

Poor

Teton County, Wyoming · 2.5 Mi. South of Canyon J · Structure no. 1570019P0000000

Built
1934
91 years old
Condition
Poor
inspected September 2024
Type
Frame
Concrete
Length
23 ft
1 main span
Daily traffic
1,807
2019 count
Owner
Federal
National Park Service

About this bridge

Grand Loop Road over Otter Creek is a concrete frame carrying Grand Loop Road over Otter Creek in Teton County, Wyoming. It was built in 1934, so it is 91 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 1,807 vehicles a day, roughly 1% of them trucks, projected to reach 2,168 by 2039. The structure is 23 ft (7 m) long and 33 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesGrand Loop Road
CrossesOtter Creek
Location2.5 Mi. South of Canyon J
RouteFederal Lands Road 10
StateWyoming
Coordinates44.70178, -110.50617
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.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, 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 stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,807 (2019)
Projected traffic2,168 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$3.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Grand Loop Road over Otter Creek built?

It was built in 1934, making it 91 years old in 2025.

What condition is Grand Loop Road over Otter 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 Grand Loop Road over Otter Creek carry?

About 1,807 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Grand Loop Road over Otter Creek?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 33 ft wide.

Who owns Grand Loop Road over Otter Creek?

It is owned by the National Park Service.