US Bridges

Trinity Mtn RD over Fall Creek

Good

Elmore County, Idaho · 1.1 N 5.3 W Pine · Structure no. 000000000027861

Built
2014
11 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
1 main span
Daily traffic
130
2023 count
Owner
Local
Other Local Agency

About this bridge

Trinity Mtn RD over Fall Creek is a steel stringer/multi-beam or girder carrying Trinity Mtn RD over Fall Creek in Elmore County, Idaho. It was built in 2014, so it is 11 years old, younger than the Idaho average of 45.3 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 130 vehicles a day, roughly 8% of them trucks, projected to reach 195 by 2042. The structure is 52 ft (15.9 m) long and 20 ft wide. If it were closed, the detour would be 36 mi (58 km).

CarriesTrinity Mtn RD
CrossesFall Creek
Location1.1 N 5.3 W Pine
RouteCounty Highway 0
StateIdaho
Coordinates43.50019, -115.41636
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating72.5 US tons
Inventory rating55.7 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length52 ft (15.9 m)
Longest span49 ft (14.9 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130 (2023)
Projected traffic195 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Trinity Mtn RD over Fall Creek built?

It was built in 2014, making it 11 years old in 2025.

What condition is Trinity Mtn RD over Fall 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 Trinity Mtn RD over Fall Creek carry?

About 130 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Trinity Mtn RD over Fall Creek?

The structure is 52 ft (15.9 m) long with a longest span of 49 ft (14.9 m) and a deck 20 ft wide.

Who owns Trinity Mtn RD over Fall Creek?

It is owned by the Other Local Agency.