US Bridges

Tuttle LN over E Rosebud Creek 003

Good

Carbon County, Montana · 3.7M NE Roscoe · Structure no. L05379000+01001

Built
2009
16 years old
Condition
Good
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
78 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Tuttle LN over E Rosebud Creek 003 is a prestressed concrete tee beam carrying Tuttle LN over E Rosebud Creek 003 in Carbon County, Montana. It was built in 2009, so it is 16 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 78 ft (23.7 m) long and 27 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesTuttle LN
CrossesE Rosebud Creek 003
Location3.7M NE Roscoe
RouteCounty Highway 379
StateMontana
Coordinates45.39488, -109.48136
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating43 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length78 ft (23.7 m)
Longest span78 ft (23.7 m)
Deck width27 ft (8.1 m)
Roadway width22 ft (6.8 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 closed123.7 mi (199 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 Tuttle LN over E Rosebud Creek 003 built?

It was built in 2009, making it 16 years old in 2025.

What condition is Tuttle LN over E Rosebud Creek 003 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 November 2023.

How much traffic does Tuttle LN over E Rosebud Creek 003 carry?

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

How long is Tuttle LN over E Rosebud Creek 003?

The structure is 78 ft (23.7 m) long with a longest span of 78 ft (23.7 m) and a deck 27 ft wide.

Who owns Tuttle LN over E Rosebud Creek 003?

It is owned by the County Highway Agency.