US Bridges

49 1/2 Avenue over Big Muddy Creek

PoorPosted for load

Morton County, North Dakota · 1 E 1 S Almont · Structure no. 000000030129181

Built
1940
85 years old, rebuilt 2002
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
94 ft
3 main spans
Daily traffic
10
2018 count
Owner
County
County Highway Agency

About this bridge

49 1/2 Avenue over Big Muddy Creek is a wood or timber stringer/multi-beam or girder carrying 49 1/2 Avenue over Big Muddy Creek in Morton County, North Dakota. It was built in 1940 and reconstructed in 2002, so it is 85 years old, older than the North Dakota average of 48.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, projected to reach 10 by 2038. The structure is 94 ft (28.7 m) long and 20 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Carries49 1/2 Avenue
CrossesBig Muddy Creek
Location1 E 1 S Almont
RouteCounty Highway 0
Coordinates46.7175, -101.49354
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating18.3 US tons
Inventory rating12.2 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length94 ft (28.7 m)
Longest span39 ft (11.9 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2018)
Projected traffic10 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$267,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 49 1/2 Avenue over Big Muddy Creek built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 2002.

What condition is 49 1/2 Avenue over Big Muddy Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.

How much traffic does 49 1/2 Avenue over Big Muddy Creek carry?

About 10 vehicles per day (2018 count).

How long is 49 1/2 Avenue over Big Muddy Creek?

The structure is 94 ft (28.7 m) long with a longest span of 39 ft (11.9 m) and a deck 20 ft wide.

Who owns 49 1/2 Avenue over Big Muddy Creek?

It is owned by the County Highway Agency.