US Bridges

S 56th ST W over Canyon Creek Ditch 075

Fair

Yellowstone County, Montana · W Billings-S 56th ST W · Structure no. L56506005+03001

Built
1925
100 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
25 ft
1 main span
Daily traffic
2,295
2023 count
Owner
County
County Highway Agency

About this bridge

S 56th ST W over Canyon Creek Ditch 075 is a steel stringer/multi-beam or girder carrying S 56th ST W over Canyon Creek Ditch 075 in Yellowstone County, Montana. It was built in 1925, so it is 100 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 2,295 vehicles a day, roughly 3% of them trucks, projected to reach 2,444 by 2043. The structure is 25 ft (7.6 m) long and 25 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesS 56th ST W
CrossesCanyon Creek Ditch 075
LocationW Billings-S 56th ST W
RouteCounty Highway 56506
CountyYellowstone County
StateMontana
Coordinates45.71015, -108.65869
Functional classRural Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span24 ft (7.3 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,295 (2023)
Projected traffic2,444 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 56th ST W over Canyon Creek Ditch 075 built?

It was built in 1925, making it 100 years old in 2025.

What condition is S 56th ST W over Canyon Creek Ditch 075 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 December 2024.

How much traffic does S 56th ST W over Canyon Creek Ditch 075 carry?

About 2,295 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S 56th ST W over Canyon Creek Ditch 075?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 25 ft wide.

Who owns S 56th ST W over Canyon Creek Ditch 075?

It is owned by the County Highway Agency.