US Bridges

County Road 138 over Big Muddy Creek

Good

Morton County, North Dakota · 2 West 1 North of Almont · Structure no. 000000030127160

Built
1984
41 years old
Condition
Good
inspected July 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
106 ft
3 main spans
Daily traffic
72
2018 count
Owner
County
County Highway Agency

About this bridge

County Road 138 over Big Muddy Creek is a prestressed concrete box beam or girders - single or spread carrying County Road 138 over Big Muddy Creek in Morton County, North Dakota. It was built in 1984, so it is 41 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 72 vehicles a day, roughly 10% of them trucks, projected to reach 120 by 2038. The structure is 106 ft (32.3 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesCounty Road 138
CrossesBig Muddy Creek
Location2 West 1 North of Almont
RouteCounty Highway 3020
Coordinates46.74723, -101.54298
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating24.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length106 ft (32.3 m)
Longest span38 ft (11.6 m)
Deck width32 ft (9.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic72 (2018)
Projected traffic120 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 County Road 138 over Big Muddy Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is County Road 138 over Big Muddy Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does County Road 138 over Big Muddy Creek carry?

About 72 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is County Road 138 over Big Muddy Creek?

The structure is 106 ft (32.3 m) long with a longest span of 38 ft (11.6 m) and a deck 32 ft wide.

Who owns County Road 138 over Big Muddy Creek?

It is owned by the County Highway Agency.