US Bridges

Hilltop RD over Lake Elmo DR

Good

Yellowstone County, Montana · Billings-Hilltop RD · Structure no. U01027002+01201

Built
1990
35 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
141 ft
3 main spans
Daily traffic
8,274
2023 count
Owner
County
County Highway Agency

About this bridge

Hilltop RD over Lake Elmo DR is a prestressed concrete stringer/multi-beam or girder carrying Hilltop RD over Lake Elmo DR in Yellowstone County, Montana. It was built in 1990, so it is 35 years old, younger than the Montana average of 47 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 8,274 vehicles a day, roughly 1% of them trucks, projected to reach 8,688 by 2043. The structure is 141 ft (43 m) long and 67 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesHilltop RD
CrossesLake Elmo DR
LocationBillings-Hilltop RD
RouteCity Street 1027
StateMontana
Coordinates45.81288, -108.47623
Functional classUrban Minor Arterial

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.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating35.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length141 ft (43 m)
Longest span67 ft (20.5 m)
Deck width67 ft (20.5 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,274 (2023)
Projected traffic8,688 by 2043
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$818,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Hilltop RD over Lake Elmo DR built?

It was built in 1990, making it 35 years old in 2025.

What condition is Hilltop RD over Lake Elmo DR 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 October 2023.

How much traffic does Hilltop RD over Lake Elmo DR carry?

About 8,274 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Hilltop RD over Lake Elmo DR?

The structure is 141 ft (43 m) long with a longest span of 67 ft (20.5 m) and a deck 67 ft wide.

Who owns Hilltop RD over Lake Elmo DR?

It is owned by the County Highway Agency.