US Bridges

County Road 018 over West Charlie Creek 045

Fair

Richland County, Montana · 52M NW Sidney · Structure no. L42018003+02001

Built
1994
31 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

County Road 018 over West Charlie Creek 045 is a prestressed concrete tee beam carrying County Road 018 over West Charlie Creek 045 in Richland County, Montana. It was built in 1994, so it is 31 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 71 ft (21.6 m) long and 26 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesCounty Road 018
CrossesWest Charlie Creek 045
Location52M NW Sidney
RouteCounty Highway 42018
StateMontana
Coordinates48.09955, -104.87552
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length71 ft (21.6 m)
Longest span69 ft (21 m)
Deck width26 ft (7.9 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 closed18 mi (29 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 County Road 018 over West Charlie Creek 045 built?

It was built in 1994, making it 31 years old in 2025.

What condition is County Road 018 over West Charlie Creek 045 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.

How much traffic does County Road 018 over West Charlie Creek 045 carry?

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

How long is County Road 018 over West Charlie Creek 045?

The structure is 71 ft (21.6 m) long with a longest span of 69 ft (21 m) and a deck 26 ft wide.

Who owns County Road 018 over West Charlie Creek 045?

It is owned by the County Highway Agency.