US Bridges

Off Ramp to 14th S over RR

Good

Cascade County, Montana · Great Falls · Structure no. I00315001+00693

Built
1996
29 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
186 ft
5 main spans
Daily traffic
3,428
2023 count
Owner
State
State Highway Agency

About this bridge

Off Ramp to 14th S over RR is a prestressed concrete stringer/multi-beam or girder carrying Off Ramp to 14th S over RR in Cascade County, Montana. It was built in 1996, so it is 29 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 3,428 vehicles a day, roughly 3% of them trucks, projected to reach 3,633 by 2043. The structure is 186 ft (56.7 m) long and 26 ft wide.

CarriesOff Ramp to 14th S
CrossesRR
LocationGreat Falls
RouteInterstate 315
StateMontana
Coordinates47.4882, -111.33516
Functional classUrban Principal Arterial - Interstate

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 rating36 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length186 ft (56.7 m)
Longest span51 ft (15.6 m)
Deck width26 ft (8 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,428 (2023)
Projected traffic3,633 by 2043
Trucks3%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 Off Ramp to 14th S over RR built?

It was built in 1996, making it 29 years old in 2025.

What condition is Off Ramp to 14th S over RR 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 Off Ramp to 14th S over RR carry?

About 3,428 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Off Ramp to 14th S over RR?

The structure is 186 ft (56.7 m) long with a longest span of 51 ft (15.6 m) and a deck 26 ft wide.

Who owns Off Ramp to 14th S over RR?

It is owned by the State Highway Agency.