US Bridges

Csah 4 over Stanchfield Brook

Fair

Isanti County, Minnesota · At JCT Csah 14 · Structure no. 7237

Built
1959
66 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
53 ft
3 main spans
Daily traffic
530
2016 count
Owner
County
County Highway Agency

About this bridge

Csah 4 over Stanchfield Brook is a wood or timber stringer/multi-beam or girder carrying Csah 4 over Stanchfield Brook in Isanti County, Minnesota. It was built in 1959, so it is 66 years old, older 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 5 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 530 vehicles a day, roughly 8% of them trucks, projected to reach 530 by 2039. The structure is 53 ft (16.2 m) long and 30 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesCsah 4
CrossesStanchfield Brook
LocationAt JCT Csah 14
RouteCounty Highway 4
CountyIsanti County
StateMinnesota
Coordinates45.71655, -93.29742
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating38.9 US tons
Inventory rating27.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 20
Structure length53 ft (16.2 m)
Longest span17 ft (5.2 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic530 (2016)
Projected traffic530 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 4 over Stanchfield Brook built?

It was built in 1959, making it 66 years old in 2025.

What condition is Csah 4 over Stanchfield Brook 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 October 2024.

How much traffic does Csah 4 over Stanchfield Brook carry?

About 530 vehicles per day (2016 count), of which roughly 8% are trucks.

How long is Csah 4 over Stanchfield Brook?

The structure is 53 ft (16.2 m) long with a longest span of 17 ft (5.2 m) and a deck 30 ft wide.

Who owns Csah 4 over Stanchfield Brook?

It is owned by the County Highway Agency.