US Bridges

T 66 over Split Rock Creek

Fair

Pipestone County, Minnesota · 0.9 MI S of JCT TH 23 · Structure no. 59532

Built
1997
28 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Prestressed Concrete
Length
108 ft
3 main spans
Daily traffic
65
1986 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 66 over Split Rock Creek is a prestressed concrete tee beam carrying T 66 over Split Rock Creek 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 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 65 vehicles a day, projected to reach 65 by 2029. The structure is 108 ft (32.9 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesT 66
CrossesSplit Rock Creek
Location0.9 MI S of JCT TH 23
RouteCounty Highway 66
CountyPipestone County
StateMinnesota
Coordinates43.87284, -96.38736
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating63.2 US tons
Inventory rating37.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 25 or greater
Structure length108 ft (32.9 m)
Longest span41 ft (12.6 m)
Deck width36 ft (11 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic65 (1986)
Projected traffic65 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 66 over Split Rock Creek built?

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

What condition is T 66 over Split Rock 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 August 2024.

How much traffic does T 66 over Split Rock Creek carry?

About 65 vehicles per day (1986 count).

How long is T 66 over Split Rock Creek?

The structure is 108 ft (32.9 m) long with a longest span of 41 ft (12.6 m) and a deck 36 ft wide.

Who owns T 66 over Split Rock Creek?

It is owned by the Town or Township Highway Agency.