US Bridges

S 522 (36-31) over Pryor Creek

Good

Yellowstone County, Montana · 1M S Huntley · Structure no. S00522000+02451

Built
2011
14 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
184 ft
3 main spans
Daily traffic
4,332
2023 count
Owner
State
State Highway Agency

About this bridge

S 522 (36-31) over Pryor Creek is a prestressed concrete stringer/multi-beam or girder carrying S 522 (36-31) over Pryor Creek in Yellowstone 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 4,332 vehicles a day, roughly 2% of them trucks, projected to reach 4,549 by 2043. The structure is 184 ft (56 m) long and 43 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesS 522 (36-31)
CrossesPryor Creek
Location1M S Huntley
RouteState Highway 266
StateMontana
Coordinates45.8872, -108.31151
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length184 ft (56 m)
Longest span98 ft (30 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,332 (2023)
Projected traffic4,549 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 S 522 (36-31) over Pryor Creek built?

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

What condition is S 522 (36-31) over Pryor 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 December 2023.

How much traffic does S 522 (36-31) over Pryor Creek carry?

About 4,332 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is S 522 (36-31) over Pryor Creek?

The structure is 184 ft (56 m) long with a longest span of 98 ft (30 m) and a deck 43 ft wide.

Who owns S 522 (36-31) over Pryor Creek?

It is owned by the State Highway Agency.