US Bridges

T 11 over Rock River

Fair

Pipestone County, Minnesota · 1.2 MI W of JCT Csah 17 · Structure no. 59518

Built
1997
28 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
81 ft
3 main spans
Daily traffic
33
1997 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 11 over Rock River is a concrete continuous slab carrying T 11 over Rock River in Pipestone County, Minnesota. It was built in 1997, so it is 28 years old, younger 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.

It carries about 33 vehicles a day, projected to reach 33 by 2029. The structure is 81 ft (24.6 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesT 11
CrossesRock River
Location1.2 MI W of JCT Csah 17
RouteCounty Highway 11
CountyPipestone County
StateMinnesota
Coordinates43.89216, -96.15797
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment7: Better than present minimum criteria
Operating rating96.1 US tons
Inventory rating57.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length81 ft (24.6 m)
Longest span30 ft (9.1 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33 (1997)
Projected traffic33 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$650 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was T 11 over Rock River built?

It was built in 1997, making it 28 years old in 2025.

What condition is T 11 over Rock River 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 August 2024.

How much traffic does T 11 over Rock River carry?

About 33 vehicles per day (1997 count).

How long is T 11 over Rock River?

The structure is 81 ft (24.6 m) long with a longest span of 30 ft (9.1 m) and a deck 31 ft wide.

Who owns T 11 over Rock River?

It is owned by the Town or Township Highway Agency.