US Bridges

Midale RD over Big Warm Creek 045

Good

Phillips County, Montana · 22M S Malta · Structure no. L36203000+06001

Built
1995
30 years old
Condition
Good
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
74 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Midale RD over Big Warm Creek 045 is a prestressed concrete tee beam carrying Midale RD over Big Warm Creek 045 in Phillips County, Montana. It was built in 1995, so it is 30 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 74 ft (22.6 m) long and 26 ft wide. If it were closed, the detour would be 57.2 mi (92 km).

CarriesMidale RD
CrossesBig Warm Creek 045
Location22M S Malta
RouteCounty Highway 36207
StateMontana
Coordinates48.0945, -108.15164
Functional classRural Minor 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42 US tons
Inventory rating30 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length74 ft (22.6 m)
Longest span71 ft (21.6 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 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 closed57.2 mi (92 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 Midale RD over Big Warm Creek 045 built?

It was built in 1995, making it 30 years old in 2025.

What condition is Midale RD over Big Warm Creek 045 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 2024.

How much traffic does Midale RD over Big Warm Creek 045 carry?

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

How long is Midale RD over Big Warm Creek 045?

The structure is 74 ft (22.6 m) long with a longest span of 71 ft (21.6 m) and a deck 26 ft wide.

Who owns Midale RD over Big Warm Creek 045?

It is owned by the County Highway Agency.