US Bridges

Whoopup Rd-Rd 248 over Irrigation Canal 048

FairPosted for load

Dawson County, Montana · 10M S Glendive · Structure no. L11122000+08001

Built
1940
85 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
31 ft
2 main spans
Daily traffic
72
2023 count
Owner
County
County Highway Agency

About this bridge

Whoopup Rd-Rd 248 over Irrigation Canal 048 is a wood or timber stringer/multi-beam or girder carrying Whoopup Rd-Rd 248 over Irrigation Canal 048 in Dawson County, Montana. It was built in 1940, so it is 85 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. Its operating status is: posted for load restriction.

It carries about 72 vehicles a day, roughly 3% of them trucks, projected to reach 76 by 2043. The structure is 31 ft (9.5 m) long and 23 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesWhoopup Rd-Rd 248
CrossesIrrigation Canal 048
Location10M S Glendive
RouteCounty Highway 11122
CountyDawson County
StateMontana
Coordinates47.00609, -104.82861
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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating34 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length31 ft (9.5 m)
Longest span15 ft (4.7 m)
Deck width23 ft (7.1 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic72 (2023)
Projected traffic76 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Whoopup Rd-Rd 248 over Irrigation Canal 048 built?

It was built in 1940, making it 85 years old in 2025.

What condition is Whoopup Rd-Rd 248 over Irrigation Canal 048 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 2025.

How much traffic does Whoopup Rd-Rd 248 over Irrigation Canal 048 carry?

About 72 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Whoopup Rd-Rd 248 over Irrigation Canal 048?

The structure is 31 ft (9.5 m) long with a longest span of 15 ft (4.7 m) and a deck 23 ft wide.

Who owns Whoopup Rd-Rd 248 over Irrigation Canal 048?

It is owned by the County Highway Agency.