US Bridges

Airport RD over Hyalite Creek

Good

Gallatin County, Montana · 2M E Belgrade · Structure no. 000000202302974

Built
2022
3 years old
Condition
Good
inspected May 2023
Type
Tee Beam
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
4,997
2023 count
Owner
County
County Highway Agency

About this bridge

Airport RD over Hyalite Creek is a prestressed concrete tee beam carrying Airport RD over Hyalite Creek in Gallatin County, Montana. It was built in 2022, so it is 3 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 4,997 vehicles a day, roughly 1% of them trucks, projected to reach 5,247 by 2043. The structure is 40 ft (12.2 m) long and 31 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesAirport RD
CrossesHyalite Creek
Location2M E Belgrade
RouteCounty Highway 16060
CountyGallatin County
StateMontana
Coordinates45.77303, -111.12834
Functional classRural Major Collector

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than 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 alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating32.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span35 ft (10.8 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,997 (2023)
Projected traffic5,247 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Airport RD over Hyalite Creek built?

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

What condition is Airport RD over Hyalite Creek 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 May 2023.

How much traffic does Airport RD over Hyalite Creek carry?

About 4,997 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Airport RD over Hyalite Creek?

The structure is 40 ft (12.2 m) long with a longest span of 35 ft (10.8 m) and a deck 31 ft wide.

Who owns Airport RD over Hyalite Creek?

It is owned by the County Highway Agency.