US Bridges

Csah 48 over Madison Lake Channel

Good

Blue Earth County, Minnesota · 0.7 MI NE of JCT Csah 17 · Structure no. 07583

Built
2005
20 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete Continuous
Length
94 ft
3 main spans
Daily traffic
656
2022 count
Owner
County
County Highway Agency

About this bridge

Csah 48 over Madison Lake Channel is a concrete continuous slab carrying Csah 48 over Madison Lake Channel in Blue Earth County, Minnesota. It was built in 2005, so it is 20 years old, younger 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 656 vehicles a day, projected to reach 660 by 2042. The structure is 94 ft (28.5 m) long and 52 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCsah 48
CrossesMadison Lake Channel
Location0.7 MI NE of JCT Csah 17
RouteCounty Highway 48
Coordinates44.17335, -93.79459
Functional classRural Minor Collector

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 protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.3 US tons
Inventory rating49.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length94 ft (28.5 m)
Longest span35 ft (10.7 m)
Deck width52 ft (15.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic656 (2022)
Projected traffic660 by 2042
Trucks0%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$1,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 48 over Madison Lake Channel built?

It was built in 2005, making it 20 years old in 2025.

What condition is Csah 48 over Madison Lake Channel 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 September 2024.

How much traffic does Csah 48 over Madison Lake Channel carry?

About 656 vehicles per day (2022 count).

How long is Csah 48 over Madison Lake Channel?

The structure is 94 ft (28.5 m) long with a longest span of 35 ft (10.7 m) and a deck 52 ft wide.

Who owns Csah 48 over Madison Lake Channel?

It is owned by the County Highway Agency.