US Bridges

Sfr 89 over Caldwell Brook

Fair

Koochiching County, Minnesota · 15.0 Miles NE of TH 1 · Structure no. L6438

Built
1970
55 years old
Condition
Fair
inspected October 2023
Type
Slab
Wood or Timber
Length
32 ft
1 main span
Daily traffic
2
1985 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Sfr 89 over Caldwell Brook is a wood or timber slab carrying Sfr 89 over Caldwell Brook in Koochiching County, Minnesota. It was built in 1970, so it is 55 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 6 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 2 vehicles a day, projected to reach 2 by 2029. The structure is 32 ft (9.8 m) long and 13 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesSfr 89
CrossesCaldwell Brook
Location15.0 Miles NE of TH 1
RouteState Lands Road 89
CountyKoochiching County
StateMinnesota
Coordinates47.9815, -93.8402
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating47.6 US tons
Inventory rating33.8 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width13 ft (4.1 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2 (1985)
Projected traffic2 by 2029
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$66 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Sfr 89 over Caldwell Brook built?

It was built in 1970, making it 55 years old in 2025.

What condition is Sfr 89 over Caldwell 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 2023.

How much traffic does Sfr 89 over Caldwell Brook carry?

About 2 vehicles per day (1985 count).

How long is Sfr 89 over Caldwell Brook?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 13 ft wide.

Who owns Sfr 89 over Caldwell Brook?

It is owned by the State Park, Forest, or Reservation Agency.