US Bridges

Csah 12 over Estes Brook

Good

Mille Lacs County, Minnesota · 0.3 MI E of JCT Csah 18 · Structure no. 96693

Built
1989
36 years old
Condition
Good
inspected August 2021
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
1,700
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 12 over Estes Brook is a concrete culvert carrying Csah 12 over Estes Brook in Mille Lacs County, Minnesota. It was built in 1989, so it is 36 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,700 vehicles a day, projected to reach 1,550 by 2038. The structure is 26 ft (7.8 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCsah 12
CrossesEstes Brook
Location0.3 MI E of JCT Csah 18
RouteCounty Highway 12
CountyMille Lacs County
StateMinnesota
Coordinates45.66323, -93.71182
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.8 US tons
Inventory rating43.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,700 (2018)
Projected traffic1,550 by 2038
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

OwnerCounty Highway Agency
Maintained byCounty 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 Csah 12 over Estes Brook built?

It was built in 1989, making it 36 years old in 2025.

What condition is Csah 12 over Estes Brook 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 August 2021.

How much traffic does Csah 12 over Estes Brook carry?

About 1,700 vehicles per day (2018 count).

How long is Csah 12 over Estes Brook?

The structure is 26 ft (7.8 m) long with a longest span of 10 ft (3 m).

Who owns Csah 12 over Estes Brook?

It is owned by the County Highway Agency.