US Bridges

HWY 10 W over Ninemile Creek 035

Poor

Missoula County, Montana · 3M W Huson · Structure no. L32166004+05001

Built
1924
101 years old
Condition
Poor
inspected September 2023
Type
Tee Beam
Concrete
Length
124 ft
3 main spans
Daily traffic
141
2023 count
Owner
State
State Highway Agency

About this bridge

HWY 10 W over Ninemile Creek 035 is a concrete tee beam carrying HWY 10 W over Ninemile Creek 035 in Missoula County, Montana. It was built in 1924, so it is 101 years old, older than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 141 vehicles a day, roughly 3% of them trucks, projected to reach 150 by 2043. The structure is 124 ft (37.8 m) long and 22 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesHWY 10 W
CrossesNinemile Creek 035
Location3M W Huson
RouteState Highway 81008
CountyMissoula County
StateMontana
Coordinates47.02931, -114.39356
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating46 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length124 ft (37.8 m)
Longest span47 ft (14.3 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deck30 ft (9.1 m)

Traffic and service

Average daily traffic141 (2023)
Projected traffic150 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 HWY 10 W over Ninemile Creek 035 built?

It was built in 1924, making it 101 years old in 2025.

What condition is HWY 10 W over Ninemile Creek 035 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.

How much traffic does HWY 10 W over Ninemile Creek 035 carry?

About 141 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is HWY 10 W over Ninemile Creek 035?

The structure is 124 ft (37.8 m) long with a longest span of 47 ft (14.3 m) and a deck 22 ft wide.

Who owns HWY 10 W over Ninemile Creek 035?

It is owned by the State Highway Agency.