US Bridges

Vermilion Riv RD over Lyons Creek 032

Good

Sanders County, Montana · 7M E Trout Creek · Structure no. L45047009+03001

Built
1900
125 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
29 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Vermilion Riv RD over Lyons Creek 032 is a wood or timber stringer/multi-beam or girder carrying Vermilion Riv RD over Lyons Creek 032 in Sanders County, Montana. It was built in 1900, so it is 125 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 29 ft (8.7 m) long and 15 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

CarriesVermilion Riv RD
CrossesLyons Creek 032
Location7M E Trout Creek
RouteCounty Highway 45047
StateMontana
Coordinates47.86369, -115.44897
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating49.1 US tons
Inventory rating34 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length29 ft (8.7 m)
Longest span26 ft (8 m)
Deck width15 ft (4.6 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 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 Vermilion Riv RD over Lyons Creek 032 built?

It was built in 1900, making it 125 years old in 2025.

What condition is Vermilion Riv RD over Lyons Creek 032 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 October 2023.

How much traffic does Vermilion Riv RD over Lyons Creek 032 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is Vermilion Riv RD over Lyons Creek 032?

The structure is 29 ft (8.7 m) long with a longest span of 26 ft (8 m) and a deck 15 ft wide.

Who owns Vermilion Riv RD over Lyons Creek 032?

It is owned by the County Highway Agency.