US Bridges

S 16 over N Fork 1st Hay Creek

Fair

Richland County, Montana · 13M NW Sidney · Structure no. P00062024+00271

Built
2003
22 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete
Length
29 ft
2 main spans
Daily traffic
1,131
2023 count
Owner
State
State Highway Agency

About this bridge

S 16 over N Fork 1st Hay Creek is a concrete culvert carrying S 16 over N Fork 1st Hay Creek in Richland County, Montana. It was built in 2003, so it is 22 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 5 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 1,131 vehicles a day, roughly 30% of them trucks, projected to reach 1,306 by 2043. The structure is 29 ft (8.7 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesS 16
CrossesN Fork 1st Hay Creek
Location13M NW Sidney
RouteState Highway 16
CountyRichland County
StateMontana
Coordinates47.88006, -104.29944
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 protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length29 ft (8.7 m)
Longest span14 ft (4.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,131 (2023)
Projected traffic1,306 by 2043
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 N Fork 1st Hay Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is S 16 over N Fork 1st Hay 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 N Fork 1st Hay Creek carry?

About 1,131 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is S 16 over N Fork 1st Hay Creek?

The structure is 29 ft (8.7 m) long with a longest span of 14 ft (4.2 m).

Who owns S 16 over N Fork 1st Hay Creek?

It is owned by the State Highway Agency.