US Bridges

Montgomery RD over King Hill Creek

FairPosted for load

Elmore County, Idaho · 0.7 N. 1.4 W. King Hill · Structure no. 000000000027790

Built
1963
62 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
61 ft
1 main span
Daily traffic
30
2023 count
Owner
Local
Other Local Agency

About this bridge

Montgomery RD over King Hill Creek is a prestressed concrete tee beam carrying Montgomery RD over King Hill Creek in Elmore County, Idaho. It was built in 1963, so it is 62 years old, older 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. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, roughly 5% of them trucks, projected to reach 45 by 2039. The structure is 61 ft (18.6 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesMontgomery RD
CrossesKing Hill Creek
Location0.7 N. 1.4 W. King Hill
RouteCounty Highway 0
CountyElmore County
StateIdaho
Coordinates43.01279, -115.23476
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum 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 rating52 US tons
Inventory rating31 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length61 ft (18.6 m)
Longest span60 ft (18.3 m)
Deck width20 ft (6 m)
Roadway width18 ft (5.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic45 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$590,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Montgomery RD over King Hill Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is Montgomery RD over King Hill 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 March 2024.

How much traffic does Montgomery RD over King Hill Creek carry?

About 30 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Montgomery RD over King Hill Creek?

The structure is 61 ft (18.6 m) long with a longest span of 60 ft (18.3 m) and a deck 20 ft wide.

Who owns Montgomery RD over King Hill Creek?

It is owned by the Other Local Agency.