US Bridges

Csah 15 over US 71

Fair

Beltrami County, Minnesota · 3.7 MI N of JCT TH 2 · Structure no. 04021

Built
1975
50 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
465 ft
4 main spans
Daily traffic
4,300
2018 count
Owner
State
State Highway Agency

About this bridge

Csah 15 over US 71 is a steel continuous stringer/multi-beam or girder carrying Csah 15 over US 71 in Beltrami County, Minnesota. It was built in 1975, so it is 50 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 4,300 vehicles a day, projected to reach 4,050 by 2038. The structure is 465 ft (141.7 m) long and 50 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCsah 15
CrossesUS 71
Location3.7 MI N of JCT TH 2
RouteCounty Highway 15
CountyBeltrami County
StateMinnesota
Coordinates47.54378, -94.88504
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating88.7 US tons
Inventory rating53.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length465 ft (141.7 m)
Longest span140 ft (42.6 m)
Deck width50 ft (15.3 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2018)
Projected traffic4,050 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Csah 15 over US 71 built?

It was built in 1975, making it 50 years old in 2025.

What condition is Csah 15 over US 71 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 April 2023.

How much traffic does Csah 15 over US 71 carry?

About 4,300 vehicles per day (2018 count).

How long is Csah 15 over US 71?

The structure is 465 ft (141.7 m) long with a longest span of 140 ft (42.6 m) and a deck 50 ft wide.

Who owns Csah 15 over US 71?

It is owned by the State Highway Agency.