US Bridges

13th LN NE over Muddy Creek 010

Good

Teton County, Montana · 2M SW Power · Structure no. L50034004+01001

Built
2007
18 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

13th LN NE over Muddy Creek 010 is a steel stringer/multi-beam or girder carrying 13th LN NE over Muddy Creek 010 in Teton County, Montana. It was built in 2007, so it is 18 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 40 ft (12.3 m) long and 20 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries13th LN NE
CrossesMuddy Creek 010
Location2M SW Power
RouteCounty Highway 50034
StateMontana
Coordinates47.69388, -111.70966
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44 US tons
Inventory rating27 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length40 ft (12.3 m)
Longest span38 ft (11.6 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 13th LN NE over Muddy Creek 010 built?

It was built in 2007, making it 18 years old in 2025.

What condition is 13th LN NE over Muddy Creek 010 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 March 2023.

How much traffic does 13th LN NE over Muddy Creek 010 carry?

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

How long is 13th LN NE over Muddy Creek 010?

The structure is 40 ft (12.3 m) long with a longest span of 38 ft (11.6 m) and a deck 20 ft wide.

Who owns 13th LN NE over Muddy Creek 010?

It is owned by the County Highway Agency.