US Bridges

IRR - S 213 over Rocky Coulee

Good

Glacier County, Montana · 5M NW Santa Rita · Structure no. S00213010+04371

Built
2011
14 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
136 ft
1 main span
Daily traffic
160
2023 count
Owner
State
State Highway Agency

About this bridge

IRR - S 213 over Rocky Coulee is a prestressed concrete stringer/multi-beam or girder carrying IRR - S 213 over Rocky Coulee in Glacier County, Montana. It was built in 2011, so it is 14 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 160 vehicles a day, roughly 5% of them trucks, projected to reach 168 by 2043. The structure is 136 ft (41.6 m) long and 30 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesIRR - S 213
CrossesRocky Coulee
Location5M NW Santa Rita
RouteState Highway 213
CountyGlacier County
StateMontana
Coordinates48.75172, -112.37972
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
Deck7 GoodSome minor problems.
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
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length136 ft (41.6 m)
Longest span135 ft (41.1 m)
Deck width30 ft (9.2 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2023)
Projected traffic168 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR - S 213 over Rocky Coulee built?

It was built in 2011, making it 14 years old in 2025.

What condition is IRR - S 213 over Rocky Coulee 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 IRR - S 213 over Rocky Coulee carry?

About 160 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is IRR - S 213 over Rocky Coulee?

The structure is 136 ft (41.6 m) long with a longest span of 135 ft (41.1 m) and a deck 30 ft wide.

Who owns IRR - S 213 over Rocky Coulee?

It is owned by the State Highway Agency.