US Bridges

S 214-3rd Ave over Int Sweetgrass-I 15

Fair

Toole County, Montana · Sweetgrass · Structure no. S00214032+01061

Built
1964
61 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
258 ft
5 main spans
Daily traffic
48
2023 count
Owner
State
State Highway Agency

About this bridge

S 214-3rd Ave over Int Sweetgrass-I 15 is a prestressed concrete stringer/multi-beam or girder carrying S 214-3rd Ave over Int Sweetgrass-I 15 in Toole County, Montana. It was built in 1964, so it is 61 years old, older than the Montana average of 47 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 48 vehicles a day, roughly 25% of them trucks, projected to reach 50 by 2043. The structure is 258 ft (78.6 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesS 214-3rd Ave
CrossesInt Sweetgrass-I 15
LocationSweetgrass
RouteState Highway 214
CountyToole County
StateMontana
Coordinates48.99438, -111.95989
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length258 ft (78.6 m)
Longest span61 ft (18.7 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48 (2023)
Projected traffic50 by 2043
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was S 214-3rd Ave over Int Sweetgrass-I 15 built?

It was built in 1964, making it 61 years old in 2025.

What condition is S 214-3rd Ave over Int Sweetgrass-I 15 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 May 2024.

How much traffic does S 214-3rd Ave over Int Sweetgrass-I 15 carry?

About 48 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is S 214-3rd Ave over Int Sweetgrass-I 15?

The structure is 258 ft (78.6 m) long with a longest span of 61 ft (18.7 m) and a deck 32 ft wide.

Who owns S 214-3rd Ave over Int Sweetgrass-I 15?

It is owned by the State Highway Agency.