US Bridges

T 77 over Dry Run

Fair

Dakota County, Minnesota · 0.3 MI W of JCT TH 61 · Structure no. L3249

Built
1925
100 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete
Length
28 ft
3 main spans
Daily traffic
75
1993 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 77 over Dry Run is a concrete slab carrying T 77 over Dry Run in Dakota 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 75 vehicles a day, projected to reach 75 by 2029. The structure is 28 ft (8.5 m) long and 20 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesT 77
CrossesDry Run
Location0.3 MI W of JCT TH 61
RouteCounty Highway 77
CountyDakota County
StateMinnesota
Coordinates44.65321, -92.85964
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating43.2 US tons
Inventory rating32.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span9 ft (2.7 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (1993)
Projected traffic75 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 T 77 over Dry Run built?

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

What condition is T 77 over Dry Run 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 November 2023.

How much traffic does T 77 over Dry Run carry?

About 75 vehicles per day (1993 count).

How long is T 77 over Dry Run?

The structure is 28 ft (8.5 m) long with a longest span of 9 ft (2.7 m) and a deck 20 ft wide.

Who owns T 77 over Dry Run?

It is owned by the Town or Township Highway Agency.