US Bridges

Ovando Helmville R over Big Blackfoot River 006

Fair

Powell County, Montana · 6M N Helmville · Structure no. L39001011+04001

Built
1953
72 years old
Condition
Fair
inspected April 2024
Type
Truss - Thru
Steel
Length
189 ft
1 main span
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

Ovando Helmville R over Big Blackfoot River 006 is a steel truss - thru carrying Ovando Helmville R over Big Blackfoot River 006 in Powell County, Montana. It was built in 1953, so it is 72 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 50 vehicles a day, projected to reach 53 by 2043. The structure is 189 ft (57.6 m) long and 22 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesOvando Helmville R
CrossesBig Blackfoot River 006
Location6M N Helmville
RouteCounty Highway 39104
CountyPowell County
StateMontana
Coordinates46.8967, -113.06072
Functional classRural Major 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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating34 US tons
Inventory rating21.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 15
Structure length189 ft (57.6 m)
Longest span101 ft (30.8 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic53 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 Ovando Helmville R over Big Blackfoot River 006 built?

It was built in 1953, making it 72 years old in 2025.

What condition is Ovando Helmville R over Big Blackfoot River 006 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 April 2024.

How much traffic does Ovando Helmville R over Big Blackfoot River 006 carry?

About 50 vehicles per day (2023 count).

How long is Ovando Helmville R over Big Blackfoot River 006?

The structure is 189 ft (57.6 m) long with a longest span of 101 ft (30.8 m) and a deck 22 ft wide.

Who owns Ovando Helmville R over Big Blackfoot River 006?

It is owned by the County Highway Agency.