US Bridges

Csah 89 over Keene Creek

Good

St. Louis County, Minnesota · 1.2 MI S of JCT TH63 · Structure no. 69A18

Built
2014
11 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
186 ft
1 main span
Daily traffic
5,100
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 89 over Keene Creek is a prestressed concrete stringer/multi-beam or girder carrying Csah 89 over Keene Creek in St. Louis County, Minnesota. It was built in 2014, so it is 11 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 5,100 vehicles a day, roughly 8% of them trucks, projected to reach 6,014 by 2039. The structure is 186 ft (56.7 m) long and 49 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCsah 89
CrossesKeene Creek
Location1.2 MI S of JCT TH63
RouteCounty Highway 89
CountySt. Louis County
StateMinnesota
Coordinates46.74878, -92.18483
Functional classUrban 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating71.8 US tons
Inventory rating45.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length186 ft (56.7 m)
Longest span179 ft (54.5 m)
Deck width49 ft (15 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,100 (2019)
Projected traffic6,014 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 89 over Keene Creek built?

It was built in 2014, making it 11 years old in 2025.

What condition is Csah 89 over Keene Creek 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 Csah 89 over Keene Creek carry?

About 5,100 vehicles per day (2019 count), of which roughly 8% are trucks.

How long is Csah 89 over Keene Creek?

The structure is 186 ft (56.7 m) long with a longest span of 179 ft (54.5 m) and a deck 49 ft wide.

Who owns Csah 89 over Keene Creek?

It is owned by the County Highway Agency.