US Bridges

S 16-S Central Ave over Lone Tree Creek

Fair

Richland County, Montana · Sidney-S Central Ave · Structure no. P00020051+06421

Built
1974
51 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
90 ft
4 main spans
Daily traffic
3,968
2023 count
Owner
State
State Highway Agency

About this bridge

S 16-S Central Ave over Lone Tree Creek is a concrete continuous slab carrying S 16-S Central Ave over Lone Tree Creek in Richland County, Montana. It was built in 1974, so it is 51 years old, older 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 3,968 vehicles a day, roughly 10% of them trucks, projected to reach 4,166 by 2043. The structure is 90 ft (27.4 m) long and 95 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesS 16-S Central Ave
CrossesLone Tree Creek
LocationSidney-S Central Ave
RouteState Highway 16
CountyRichland County
StateMontana
Coordinates47.70567, -104.164
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating38 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length90 ft (27.4 m)
Longest span25 ft (7.6 m)
Deck width95 ft (29 m)
Roadway width83 ft (25.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,968 (2023)
Projected traffic4,166 by 2043
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemYes

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 S 16-S Central Ave over Lone Tree Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is S 16-S Central Ave over Lone Tree Creek 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 May 2024.

How much traffic does S 16-S Central Ave over Lone Tree Creek carry?

About 3,968 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is S 16-S Central Ave over Lone Tree Creek?

The structure is 90 ft (27.4 m) long with a longest span of 25 ft (7.6 m) and a deck 95 ft wide.

Who owns S 16-S Central Ave over Lone Tree Creek?

It is owned by the State Highway Agency.