US Bridges

Fdr 100 over Eldorado Creek

Fair

Idaho County, Idaho · Eldorado Creek · Structure no. 010501000000085

Built
1987
38 years old
Condition
Fair
inspected August 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
150
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 100 over Eldorado Creek is a prestressed concrete stringer/multi-beam or girder carrying Fdr 100 over Eldorado Creek in Idaho County, Idaho. It was built in 1987, so it is 38 years old, younger than the Idaho average of 45.3 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 150 vehicles a day, roughly 5% of them trucks, projected to reach 225 by 2045. The structure is 40 ft (12.2 m) long and 27 ft wide.

Location

Open in Google Maps
CarriesFdr 100
CrossesEldorado Creek
LocationEldorado Creek
RouteFederal Lands Road 100
CountyIdaho County
StateIdaho
Coordinates46.29454, -115.7498
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
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 rating38.3 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width27 ft (8.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (—)
Projected traffic225 by 2045
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Fdr 100 over Eldorado Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Fdr 100 over Eldorado 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 August 2022.

How much traffic does Fdr 100 over Eldorado Creek carry?

About 150 vehicles per day (latest count), of which roughly 5% are trucks.

How long is Fdr 100 over Eldorado Creek?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 27 ft wide.

Who owns Fdr 100 over Eldorado Creek?

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