US Bridges

S 16 over Morgan Creek

Fair

Dawson County, Montana · 4M SW Intake · Structure no. P00020012+05321

Built
1967
58 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
123 ft
2 main spans
Daily traffic
2,333
2023 count
Owner
State
State Highway Agency

About this bridge

S 16 over Morgan Creek is a prestressed concrete stringer/multi-beam or girder carrying S 16 over Morgan Creek in Dawson County, Montana. It was built in 1967, so it is 58 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 2,333 vehicles a day, roughly 13% of them trucks, projected to reach 2,461 by 2043. The structure is 123 ft (37.4 m) long and 43 ft wide. If it were closed, the detour would be 65.9 mi (106 km).

Location

Open in Google Maps
CarriesS 16
CrossesMorgan Creek
Location4M SW Intake
RouteCounty Highway 16
CountyDawson County
StateMontana
Coordinates47.26511, -104.61897
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length123 ft (37.4 m)
Longest span61 ft (18.6 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,333 (2023)
Projected traffic2,461 by 2043
Trucks13%
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 Morgan Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is S 16 over Morgan 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 Morgan Creek carry?

About 2,333 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is S 16 over Morgan Creek?

The structure is 123 ft (37.4 m) long with a longest span of 61 ft (18.6 m) and a deck 43 ft wide.

Who owns S 16 over Morgan Creek?

It is owned by the State Highway Agency.