US Bridges

Csah 40 over I 35

Fair

Chisago County, Minnesota · 7.3 MI N of JCT TH 95 · Structure no. 13807

Built
1967
58 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
231 ft
4 main spans
Daily traffic
199
2022 count
Owner
State
State Highway Agency

About this bridge

Csah 40 over I 35 is a prestressed concrete stringer/multi-beam or girder carrying Csah 40 over I 35 in Chisago County, Minnesota. It was built in 1967, so it is 58 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 199 vehicles a day, projected to reach 275 by 2042. The structure is 231 ft (70.4 m) long and 34 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCsah 40
CrossesI 35
Location7.3 MI N of JCT TH 95
RouteCounty Highway 40
CountyChisago County
StateMinnesota
Coordinates45.61551, -92.99239
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.2 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length231 ft (70.4 m)
Longest span71 ft (21.5 m)
Deck width34 ft (10.3 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic199 (2022)
Projected traffic275 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 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$687 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Csah 40 over I 35 built?

It was built in 1967, making it 58 years old in 2025.

What condition is Csah 40 over I 35 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 May 2024.

How much traffic does Csah 40 over I 35 carry?

About 199 vehicles per day (2022 count).

How long is Csah 40 over I 35?

The structure is 231 ft (70.4 m) long with a longest span of 71 ft (21.5 m) and a deck 34 ft wide.

Who owns Csah 40 over I 35?

It is owned by the State Highway Agency.