US Bridges

Csah 20 over Elk River

Good

Sherburne County, Minnesota · 0.1 MI S Ofjct Csah 16 · Structure no. 71521

Built
2000
25 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
171 ft
3 main spans
Daily traffic
560
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 20 over Elk River is a prestressed concrete stringer/multi-beam or girder carrying Csah 20 over Elk River in Sherburne County, Minnesota. It was built in 2000, so it is 25 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 560 vehicles a day, projected to reach 495 by 2038. The structure is 171 ft (52.2 m) long and 38 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesCsah 20
CrossesElk River
Location0.1 MI S Ofjct Csah 16
RouteCounty Highway 20
Coordinates45.48594, -94.00641
Functional classRural Major 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 protection7 GoodSome minor problems.
Last inspectionOctober 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.1 US tons
Inventory rating59 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length171 ft (52.2 m)
Longest span55 ft (16.8 m)
Deck width38 ft (11.7 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic560 (2018)
Projected traffic495 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 20 over Elk River built?

It was built in 2000, making it 25 years old in 2025.

What condition is Csah 20 over Elk River 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 2023.

How much traffic does Csah 20 over Elk River carry?

About 560 vehicles per day (2018 count).

How long is Csah 20 over Elk River?

The structure is 171 ft (52.2 m) long with a longest span of 55 ft (16.8 m) and a deck 38 ft wide.

Who owns Csah 20 over Elk River?

It is owned by the County Highway Agency.