US Bridges

T 230 over Heron Lake Outlet

Good

Cottonwood County, Minnesota · 2.9 MI E of JCT Csah 5 · Structure no. 17515

Built
1974
51 years old
Condition
Good
inspected October 2024
Type
Slab
Wood or Timber
Length
103 ft
4 main spans
Daily traffic
22
1986 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 230 over Heron Lake Outlet is a wood or timber slab carrying T 230 over Heron Lake Outlet in Cottonwood 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 22 vehicles a day, projected to reach 22 by 2029. The structure is 103 ft (31.5 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesT 230
CrossesHeron Lake Outlet
Location2.9 MI E of JCT Csah 5
RouteCounty Highway 230
Coordinates43.84809, -95.26668
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating55.1 US tons
Inventory rating38.5 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadUnknown
Structure length103 ft (31.5 m)
Longest span26 ft (8 m)
Deck width26 ft (7.9 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22 (1986)
Projected traffic22 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$340 million (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was T 230 over Heron Lake Outlet built?

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

What condition is T 230 over Heron Lake Outlet in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does T 230 over Heron Lake Outlet carry?

About 22 vehicles per day (1986 count).

How long is T 230 over Heron Lake Outlet?

The structure is 103 ft (31.5 m) long with a longest span of 26 ft (8 m) and a deck 26 ft wide.

Who owns T 230 over Heron Lake Outlet?

It is owned by the Town or Township Highway Agency.