US Bridges

Csah 7 over Green Lake Brook

Good

Isanti County, Minnesota · 0.6 MI N of JCT CO RD 39 · Structure no. 30J06

Built
2005
20 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
312
2022 count
Owner
County
County Highway Agency

About this bridge

Csah 7 over Green Lake Brook is a concrete culvert carrying Csah 7 over Green Lake Brook in Isanti 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 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 312 vehicles a day, roughly 8% of them trucks, projected to reach 410 by 2042. The structure is 23 ft (7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCsah 7
CrossesGreen Lake Brook
Location0.6 MI N of JCT CO RD 39
RouteCounty Highway 7
Coordinates45.56641, -93.4272
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.6 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length23 ft (7 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 traffic312 (2022)
Projected traffic410 by 2042
Trucks8%
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

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 7 over Green Lake Brook built?

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

What condition is Csah 7 over Green Lake 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 September 2023.

How much traffic does Csah 7 over Green Lake Brook carry?

About 312 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Csah 7 over Green Lake Brook?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns Csah 7 over Green Lake Brook?

It is owned by the County Highway Agency.