US Bridges

S 16 over Usbr Main Canal

Fair

Richland County, Montana · 4M SW Crane · Structure no. P00020037+05151

Built
1984
41 years old
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
92 ft
1 main span
Daily traffic
2,821
2023 count
Owner
State
State Highway Agency

About this bridge

S 16 over Usbr Main Canal is a prestressed concrete stringer/multi-beam or girder carrying S 16 over Usbr Main Canal in Richland County, Montana. It was built in 1984, so it is 41 years old, younger 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 2,821 vehicles a day, roughly 11% of them trucks, projected to reach 2,976 by 2043. The structure is 92 ft (27.9 m) long and 42 ft wide. If it were closed, the detour would be 65.9 mi (106 km).

Location

Open in Google Maps
CarriesS 16
CrossesUsbr Main Canal
Location4M SW Crane
RouteState Highway 16
CountyRichland County
StateMontana
Coordinates47.52856, -104.30844
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length92 ft (27.9 m)
Longest span90 ft (27.4 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,821 (2023)
Projected traffic2,976 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed65.9 mi (106 km)
TollOn a free road
National Highway SystemYes

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 16 over Usbr Main Canal built?

It was built in 1984, making it 41 years old in 2025.

What condition is S 16 over Usbr Main Canal 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 January 2023.

How much traffic does S 16 over Usbr Main Canal carry?

About 2,821 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is S 16 over Usbr Main Canal?

The structure is 92 ft (27.9 m) long with a longest span of 90 ft (27.4 m) and a deck 42 ft wide.

Who owns S 16 over Usbr Main Canal?

It is owned by the State Highway Agency.