US Bridges

I 315 S over FAU 5225-14th ST SW

Good

Cascade County, Montana · Great Falls · Structure no. I00315000+03423

Built
1997
28 years old, rebuilt 2020
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
136 ft
3 main spans
Daily traffic
5,330
2023 count
Owner
State
State Highway Agency

About this bridge

I 315 S over FAU 5225-14th ST SW is a prestressed concrete stringer/multi-beam or girder carrying I 315 S over FAU 5225-14th ST SW in Cascade County, Montana. It was built in 1997 and reconstructed in 2020, so it is 28 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 5,330 vehicles a day, projected to reach 5,596 by 2043. The structure is 136 ft (41.5 m) long and 26 ft wide.

CarriesI 315 S
CrossesFAU 5225-14th ST SW
LocationGreat Falls
StateMontana
Coordinates47.48664, -111.33818
Functional classUrban 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating38.1 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length136 ft (41.5 m)
Longest span47 ft (14.4 m)
Deck width26 ft (8 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,330 (2023)
Projected traffic5,596 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 315 S over FAU 5225-14th ST SW built?

It was built in 1997, making it 28 years old in 2025. It was reconstructed in 2020.

What condition is I 315 S over FAU 5225-14th ST SW 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 I 315 S over FAU 5225-14th ST SW carry?

About 5,330 vehicles per day (2023 count).

How long is I 315 S over FAU 5225-14th ST SW?

The structure is 136 ft (41.5 m) long with a longest span of 47 ft (14.4 m) and a deck 26 ft wide.

Who owns I 315 S over FAU 5225-14th ST SW?

It is owned by the State Highway Agency.