US Bridges

S 16 over Three Mile Creek

Fair

Dawson County, Montana · 7M NE Glendive · Structure no. P00020007+00501

Built
1964
61 years old
Condition
Fair
inspected January 2025
Type
Culvert
Steel
Length
27 ft
2 main spans
Daily traffic
2,240
2023 count
Owner
State
State Highway Agency

About this bridge

S 16 over Three Mile Creek is a steel culvert carrying S 16 over Three Mile Creek in Dawson County, Montana. It was built in 1964, so it is 61 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 2,240 vehicles a day, roughly 14% of them trucks, projected to reach 2,363 by 2043. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 65.9 mi (106 km).

CarriesS 16
CrossesThree Mile Creek
Location7M NE Glendive
RouteState Highway 16
StateMontana
Coordinates47.19894, -104.68244
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,240 (2023)
Projected traffic2,363 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed65.9 mi (106 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 over Three Mile Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is S 16 over Three Mile 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 January 2025.

How much traffic does S 16 over Three Mile Creek carry?

About 2,240 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is S 16 over Three Mile Creek?

The structure is 27 ft (8.2 m) long with a longest span of 11 ft (3.5 m).

Who owns S 16 over Three Mile Creek?

It is owned by the State Highway Agency.