US Bridges

35th ST over Square Butte Creek

Fair

Morton County, North Dakota · 1 West 5 North Mandan · Structure no. 000000030156050

Built
2004
21 years old
Condition
Fair
inspected July 2021
Type
Culvert
Concrete
Length
43 ft
2 main spans
Daily traffic
144
2018 count
Owner
County
County Highway Agency

About this bridge

35th ST over Square Butte Creek is a concrete culvert carrying 35th ST over Square Butte Creek in Morton County, North Dakota. It was built in 2004, so it is 21 years old, younger than the North Dakota average of 48.2 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 144 vehicles a day, roughly 1% of them trucks, projected to reach 2,500 by 2038. The structure is 43 ft (13.1 m) long. If it were closed, the detour would be 5 mi (8 km).

Carries35th ST
CrossesSquare Butte Creek
Location1 West 5 North Mandan
RouteCounty Highway 0
Coordinates46.90846, -100.92332
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2021
Inspection intervalevery 48 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 alignment6: Equal to present minimum criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length43 ft (13.1 m)
Longest span21 ft (6.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic144 (2018)
Projected traffic2,500 by 2038
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 35th ST over Square Butte Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is 35th ST over Square Butte 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 July 2021.

How much traffic does 35th ST over Square Butte Creek carry?

About 144 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is 35th ST over Square Butte Creek?

The structure is 43 ft (13.1 m) long with a longest span of 21 ft (6.4 m).

Who owns 35th ST over Square Butte Creek?

It is owned by the County Highway Agency.