US Bridges

Fs Route No. 628 over E.F. Boulder

Good

Boundary County, Idaho · East Fork Boulder · Structure no. 010400000036224

Built
2022
3 years old
Condition
Good
inspected September 2023
Type
Girder and Floorbeam System
Steel
Length
65 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Fs Route No. 628 over E.F. Boulder is a steel girder and floorbeam system carrying Fs Route No. 628 over E.F. Boulder in Boundary County, Idaho. It was built in 2022, so it is 3 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 65 ft (19.8 m) long and 14 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

Location

No coordinates are recorded for this structure.

CarriesFs Route No. 628
CrossesE.F. Boulder
LocationEast Fork Boulder
RouteFederal Lands Road 628
CountyBoundary County
StateIdaho
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 protection9 ExcellentNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation*: *
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating—
Inventory rating—

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckCorrugated steel
Main spans1 (+2 approach)
Design loadHL 93
Structure length65 ft (19.8 m)
Longest span63 ft (19.1 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Fs Route No. 628 over E.F. Boulder built?

It was built in 2022, making it 3 years old in 2025.

What condition is Fs Route No. 628 over E.F. Boulder 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 September 2023.

How much traffic does Fs Route No. 628 over E.F. Boulder carry?

About 50 vehicles per day (latest count).

How long is Fs Route No. 628 over E.F. Boulder?

The structure is 65 ft (19.8 m) long with a longest span of 63 ft (19.1 m) and a deck 14 ft wide.

Who owns Fs Route No. 628 over E.F. Boulder?

It is owned by the U.S. Forest Service.