US Bridges

T 89 over Mill Creek

FairPosted for load

Olmsted County, Minnesota · 0.1 MI W of JCT CR 137 · Structure no. L9525

Built
1974
51 years old
Condition
Fair
inspected December 2024
Type
Slab
Prestressed Concrete
Length
47 ft
1 main span
Daily traffic
15
1986 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 89 over Mill Creek is a prestressed concrete slab carrying T 89 over Mill Creek in Olmsted County, Minnesota. It was built in 1974, so it is 51 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 15 vehicles a day, projected to reach 15 by 2029. The structure is 47 ft (14.3 m) long and 20 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesT 89
CrossesMill Creek
Location0.1 MI W of JCT CR 137
RouteCounty Highway 89
Coordinates43.89454, -92.22518
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.2 US tons
Inventory rating19.8 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length47 ft (14.3 m)
Longest span45 ft (13.6 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (1986)
Projected traffic15 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 89 over Mill Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is T 89 over Mill Creek 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 December 2024.

How much traffic does T 89 over Mill Creek carry?

About 15 vehicles per day (1986 count).

How long is T 89 over Mill Creek?

The structure is 47 ft (14.3 m) long with a longest span of 45 ft (13.6 m) and a deck 20 ft wide.

Who owns T 89 over Mill Creek?

It is owned by the Town or Township Highway Agency.