US Bridges

Sfr 90 over Caldwell Brook

Fair

Koochiching County, Minnesota · 8.7 MI W of JCT TH 6 · Structure no. R0428

Built
1989
36 years old
Condition
Fair
inspected October 2023
Type
Slab
Wood or Timber
Length
77 ft
3 main spans
Daily traffic
2
1973 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Sfr 90 over Caldwell Brook is a wood or timber slab carrying Sfr 90 over Caldwell Brook in Koochiching 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 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 77 ft (23.6 m) long and 20 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesSfr 90
CrossesCaldwell Brook
Location8.7 MI W of JCT TH 6
RouteState Lands Road 90
CountyKoochiching County
StateMinnesota
Coordinates47.9541, -93.8819
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating53.9 US tons
Inventory rating41.8 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length77 ft (23.6 m)
Longest span29 ft (8.8 m)
Deck width20 ft (6.2 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2 (1973)
Projected traffic2 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sfr 90 over Caldwell Brook built?

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

What condition is Sfr 90 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 90 over Caldwell Brook carry?

About 2 vehicles per day (1973 count).

How long is Sfr 90 over Caldwell Brook?

The structure is 77 ft (23.6 m) long with a longest span of 29 ft (8.8 m) and a deck 20 ft wide.

Who owns Sfr 90 over Caldwell Brook?

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