US Bridges

South Bay Dr.Se over Water Way

Good

Morton County, North Dakota · Lakewood Harbor Mandan · Structure no. 0000MAN02

Built
2007
18 years old
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
80 ft
1 main span
Daily traffic
250
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

South Bay Dr.Se over Water Way is a prestressed concrete box beam or girders - multiple carrying South Bay Dr.Se over Water Way in Morton County, North Dakota. It was built in 2007, so it is 18 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 250 vehicles a day, roughly 1% of them trucks, projected to reach 300 by 2039. The structure is 80 ft (24.4 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSouth Bay Dr.Se
CrossesWater Way
LocationLakewood Harbor Mandan
RouteCity Street 0
Coordinates46.79407, -100.83671
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating69.8 US tons

Structure

MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length80 ft (24.4 m)
Longest span74 ft (22.7 m)
Deck width45 ft (13.7 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2019)
Projected traffic300 by 2039
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 South Bay Dr.Se over Water Way built?

It was built in 2007, making it 18 years old in 2025.

What condition is South Bay Dr.Se over Water Way 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 April 2023.

How much traffic does South Bay Dr.Se over Water Way carry?

About 250 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is South Bay Dr.Se over Water Way?

The structure is 80 ft (24.4 m) long with a longest span of 74 ft (22.7 m) and a deck 45 ft wide.

Who owns South Bay Dr.Se over Water Way?

It is owned by the City or Municipal Highway Agency.