US Bridges

Morgan Crk RD over Morgan Creek;ne.Challis

Good

Custer County, Idaho · 9.3 N. 1.5 E. Challis · Structure no. 000000000031735

Built
1977
48 years old
Condition
Good
inspected April 2023
Type
Slab
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
90
2023 count
Owner
County
County Highway Agency

About this bridge

Morgan Crk RD over Morgan Creek;ne.Challis is a prestressed concrete slab carrying Morgan Crk RD over Morgan Creek;ne.Challis in Custer County, Idaho. It was built in 1977, so it is 48 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 90 vehicles a day, roughly 13% of them trucks, projected to reach 135 by 2042. The structure is 34 ft (10.4 m) long and 32 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesMorgan Crk RD
CrossesMorgan Creek;ne.Challis
Location9.3 N. 1.5 E. Challis
RouteCounty Highway 0
CountyCuster County
StateIdaho
Coordinates44.63822, -114.20064
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65 US tons
Inventory rating11 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span32 ft (9.8 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2023)
Projected traffic135 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$459,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Morgan Crk RD over Morgan Creek;ne.Challis built?

It was built in 1977, making it 48 years old in 2025.

What condition is Morgan Crk RD over Morgan Creek;ne.Challis 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 April 2023.

How much traffic does Morgan Crk RD over Morgan Creek;ne.Challis carry?

About 90 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Morgan Crk RD over Morgan Creek;ne.Challis?

The structure is 34 ft (10.4 m) long with a longest span of 32 ft (9.8 m) and a deck 32 ft wide.

Who owns Morgan Crk RD over Morgan Creek;ne.Challis?

It is owned by the County Highway Agency.