US Bridges

Csah 16 over Rum River

Fair

Mille Lacs County, Minnesota · 1.3 MI W of JCT US 169 · Structure no. 48511

Built
1973
52 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
144 ft
3 main spans
Daily traffic
610
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 16 over Rum River is a wood or timber stringer/multi-beam or girder carrying Csah 16 over Rum River in Mille Lacs County, Minnesota. It was built in 1973, so it is 52 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 610 vehicles a day, projected to reach 570 by 2038. The structure is 144 ft (44 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 16
CrossesRum River
Location1.3 MI W of JCT US 169
RouteCounty Highway 16
CountyMille Lacs County
StateMinnesota
Coordinates45.86593, -93.6905
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating32.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length144 ft (44 m)
Longest span48 ft (14.6 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic610 (2018)
Projected traffic570 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Rum River built?

It was built in 1973, making it 52 years old in 2025.

What condition is Csah 16 over Rum River 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 Rum River carry?

About 610 vehicles per day (2018 count).

How long is Csah 16 over Rum River?

The structure is 144 ft (44 m) long with a longest span of 48 ft (14.6 m) and a deck 34 ft wide.

Who owns Csah 16 over Rum River?

It is owned by the County Highway Agency.