US Bridges

Auto Tour Road over Cnl Betw Bowdoin/Dry Lk

Good

Phillips County, Montana · Sect 1 E of Bowdoin Lake · Structure no. 000061580-00074

Built
1973
52 years old
Condition
Good
inspected August 2024
Type
Slab
Concrete Continuous
Length
51 ft
10 main spans
Daily traffic
20
2024 count
Owner
Federal
Bureau of Fish and Wildlife

About this bridge

Auto Tour Road over Cnl Betw Bowdoin/Dry Lk is a concrete continuous slab carrying Auto Tour Road over Cnl Betw Bowdoin/Dry Lk in Phillips County, Montana. It was built in 1973, so it is 52 years old, older 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 20 vehicles a day, projected to reach 25 by 2044. The structure is 51 ft (15.5 m) long and 14 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesAuto Tour Road
CrossesCnl Betw Bowdoin/Dry Lk
LocationSect 1 E of Bowdoin Lake
RouteFederal Lands Road 0
CountyPhillips County
StateMontana
Coordinates48.38867, -107.64183
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadUnknown
Structure length51 ft (15.5 m)
Longest span5 ft (1.5 m)
Deck width14 ft (4.3 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deck107 ft (32.7 m)

Traffic and service

Average daily traffic20 (2024)
Projected traffic25 by 2044
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Fish and Wildlife
Maintained byBureau of Fish and Wildlife
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 Auto Tour Road over Cnl Betw Bowdoin/Dry Lk built?

It was built in 1973, making it 52 years old in 2025.

What condition is Auto Tour Road over Cnl Betw Bowdoin/Dry Lk 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 2024.

How much traffic does Auto Tour Road over Cnl Betw Bowdoin/Dry Lk carry?

About 20 vehicles per day (2024 count).

How long is Auto Tour Road over Cnl Betw Bowdoin/Dry Lk?

The structure is 51 ft (15.5 m) long with a longest span of 5 ft (1.5 m) and a deck 14 ft wide.

Who owns Auto Tour Road over Cnl Betw Bowdoin/Dry Lk?

It is owned by the Bureau of Fish and Wildlife.