US Bridges

Undetermined RD over Maple Lake Outlet (dam)

FairPosted for load

Polk County, Minnesota · North of Br # 92436 · Structure no. 90079

Built
1925
100 years old
Condition
Fair
inspected October 2023
Type
Girder and Floorbeam System
Concrete
Length
48 ft
1 main span
Daily traffic
5
1973 count
Owner
County
County Highway Agency

About this bridge

Undetermined RD over Maple Lake Outlet (dam) is a concrete girder and floorbeam system carrying Undetermined RD over Maple Lake Outlet (dam) in Polk County, Minnesota. It was built in 1925, so it is 100 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 5 vehicles a day, projected to reach 5 by 2029. The structure is 48 ft (14.6 m) long and 27 ft wide.

Location

Open in Google Maps
CarriesUndetermined RD
CrossesMaple Lake Outlet (dam)
LocationNorth of Br # 92436
CountyPolk County
StateMinnesota
Coordinates47.6782, -96.1248
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating37.8 US tons
Inventory rating29.2 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length48 ft (14.6 m)
Longest span18 ft (5.5 m)
Deck width27 ft (8.2 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (1973)
Projected traffic5 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Undetermined RD over Maple Lake Outlet (dam) built?

It was built in 1925, making it 100 years old in 2025.

What condition is Undetermined RD over Maple Lake Outlet (dam) 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 October 2023.

How much traffic does Undetermined RD over Maple Lake Outlet (dam) carry?

About 5 vehicles per day (1973 count).

How long is Undetermined RD over Maple Lake Outlet (dam)?

The structure is 48 ft (14.6 m) long with a longest span of 18 ft (5.5 m) and a deck 27 ft wide.

Who owns Undetermined RD over Maple Lake Outlet (dam)?

It is owned by the County Highway Agency.