US Bridges

Csah 16 over Silver Rapids

Fair

Lake County, Minnesota · 1.5 MI SE of JCT CR 62 · Structure no. 38505

Built
1971
54 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
306 ft
4 main spans
Daily traffic
1,350
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 16 over Silver Rapids is a steel continuous stringer/multi-beam or girder carrying Csah 16 over Silver Rapids in Lake County, Minnesota. It was built in 1971, so it is 54 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 1,350 vehicles a day, projected to reach 1,350 by 2038. The structure is 306 ft (93.3 m) long and 36 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCsah 16
CrossesSilver Rapids
Location1.5 MI SE of JCT CR 62
RouteCounty Highway 16
CountyLake County
StateMinnesota
Coordinates47.90359, -91.75414
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.1 US tons
Inventory rating39.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length306 ft (93.3 m)
Longest span83 ft (25.3 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,350 (2018)
Projected traffic1,350 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 16 over Silver Rapids built?

It was built in 1971, making it 54 years old in 2025.

What condition is Csah 16 over Silver Rapids 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 June 2023.

How much traffic does Csah 16 over Silver Rapids carry?

About 1,350 vehicles per day (2018 count).

How long is Csah 16 over Silver Rapids?

The structure is 306 ft (93.3 m) long with a longest span of 83 ft (25.3 m) and a deck 36 ft wide.

Who owns Csah 16 over Silver Rapids?

It is owned by the County Highway Agency.