US Bridges

E Mullan RD over Mill Creek

Good

Missoula County, Montana · .18M SE Frenchtown · Structure no. 000000202008022

Built
2020
5 years old
Condition
Good
inspected December 2024
Type
Tee Beam
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

E Mullan RD over Mill Creek is a prestressed concrete tee beam carrying E Mullan RD over Mill Creek in Missoula County, Montana. It was built in 2020, so it is 5 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 62 ft (18.9 m) long and 38 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesE Mullan RD
CrossesMill Creek
Location.18M SE Frenchtown
RouteCounty Highway 32170
StateMontana
Coordinates47.01307, -114.23017
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating55 US tons
Inventory rating43 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length62 ft (18.9 m)
Longest span62 ft (18.9 m)
Deck width38 ft (11.5 m)
Roadway width34 ft (10.5 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 E Mullan RD over Mill Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is E Mullan RD over Mill 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 December 2024.

How much traffic does E Mullan RD over Mill Creek carry?

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

How long is E Mullan RD over Mill Creek?

The structure is 62 ft (18.9 m) long with a longest span of 62 ft (18.9 m) and a deck 38 ft wide.

Who owns E Mullan RD over Mill Creek?

It is owned by the County Highway Agency.