US Bridges

Howie RD over Otter Creek

Good

Sweet Grass County, Montana · 2M NE Big Timber · Structure no. S00478001+07001

Built
2000
25 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
484
2023 count
Owner
County
County Highway Agency

About this bridge

Howie RD over Otter Creek is a prestressed concrete stringer/multi-beam or girder carrying Howie RD over Otter Creek in Sweet Grass County, Montana. It was built in 2000, so it is 25 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 484 vehicles a day, roughly 1% of them trucks, projected to reach 508 by 2043. The structure is 65 ft (19.8 m) long and 30 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

CarriesHowie RD
CrossesOtter Creek
Location2M NE Big Timber
RouteCounty Highway 478
StateMontana
Coordinates45.85722, -109.90333
Functional classRural Major 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment7: Better than present minimum criteria
Operating rating58 US tons
Inventory rating37 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span65 ft (19.8 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic484 (2023)
Projected traffic508 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 Howie RD over Otter Creek built?

It was built in 2000, making it 25 years old in 2025.

What condition is Howie RD over Otter Creek 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 June 2023.

How much traffic does Howie RD over Otter Creek carry?

About 484 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Howie RD over Otter Creek?

The structure is 65 ft (19.8 m) long with a longest span of 65 ft (19.8 m) and a deck 30 ft wide.

Who owns Howie RD over Otter Creek?

It is owned by the County Highway Agency.