US Bridges

33 1/2 ST over Drainage Area

PoorPosted for load

Morton County, North Dakota · 7 North of Glen Ullin · Structure no. 000000030113040

Built
1966
59 years old
Condition
Poor
inspected November 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
29 ft
1 main span
Daily traffic
20
2018 count
Owner
County
County Highway Agency

About this bridge

33 1/2 ST over Drainage Area is a wood or timber stringer/multi-beam or girder carrying 33 1/2 ST over Drainage Area in Morton County, North Dakota. It was built in 1966, so it is 59 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 3 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 20 vehicles a day, projected to reach 10 by 2038. The structure is 29 ft (8.8 m) long and 21 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Carries33 1/2 ST
CrossesDrainage Area
Location7 North of Glen Ullin
RouteCounty Highway 0
Coordinates46.92791, -101.83854
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.
Superstructure7 GoodSome minor problems.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating24.1 US tons
Inventory rating17.2 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span26 ft (7.9 m)
Deck width21 ft (6.4 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (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 statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$77,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 33 1/2 ST over Drainage Area built?

It was built in 1966, making it 59 years old in 2025.

What condition is 33 1/2 ST over Drainage Area 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 November 2024.

How much traffic does 33 1/2 ST over Drainage Area carry?

About 20 vehicles per day (2018 count).

How long is 33 1/2 ST over Drainage Area?

The structure is 29 ft (8.8 m) long with a longest span of 26 ft (7.9 m) and a deck 21 ft wide.

Who owns 33 1/2 ST over Drainage Area?

It is owned by the County Highway Agency.