US Bridges

Ulm Vaughn RD over Sun River 057

Good

Cascade County, Montana · 2M S Vaughn · Structure no. L07530009+03001

Built
2013
12 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
225 ft
3 main spans
Daily traffic
699
2023 count
Owner
County
County Highway Agency

About this bridge

Ulm Vaughn RD over Sun River 057 is a prestressed concrete stringer/multi-beam or girder carrying Ulm Vaughn RD over Sun River 057 in Cascade County, Montana. It was built in 2013, so it is 12 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 699 vehicles a day, roughly 3% of them trucks, projected to reach 737 by 2043. The structure is 225 ft (68.7 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesUlm Vaughn RD
CrossesSun River 057
Location2M S Vaughn
RouteCounty Highway 7530
CountyCascade County
StateMontana
Coordinates47.54713, -111.53064
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 inspectionAugust 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 alignment8: Equal to present desirable criteria
Operating rating64 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length225 ft (68.7 m)
Longest span74 ft (22.7 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic699 (2023)
Projected traffic737 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Ulm Vaughn RD over Sun River 057 built?

It was built in 2013, making it 12 years old in 2025.

What condition is Ulm Vaughn RD over Sun River 057 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 August 2023.

How much traffic does Ulm Vaughn RD over Sun River 057 carry?

About 699 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Ulm Vaughn RD over Sun River 057?

The structure is 225 ft (68.7 m) long with a longest span of 74 ft (22.7 m) and a deck 31 ft wide.

Who owns Ulm Vaughn RD over Sun River 057?

It is owned by the County Highway Agency.