US Bridges

Csah 25 over Rum River

PoorPosted for load

Mille Lacs County, Minnesota · 0.4 MI S of JCT TH 27 · Structure no. 48512

Built
1973
52 years old
Condition
Poor
inspected June 2024
Type
Slab
Wood or Timber
Length
66 ft
3 main spans
Daily traffic
1,050
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 25 over Rum River is a wood or timber slab carrying Csah 25 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 1,050 vehicles a day, projected to reach 1,150 by 2038. The structure is 66 ft (20.1 m) long and 42 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCsah 25
CrossesRum River
Location0.4 MI S of JCT TH 27
RouteCounty Highway 25
Coordinates46.06587, -93.67244
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 2024
Inspection intervalevery 12 months
Operating statusPosted for load 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.9 US tons
Inventory rating35.1 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length66 ft (20.1 m)
Longest span26 ft (7.9 m)
Deck width42 ft (12.9 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2018)
Projected traffic1,150 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 25 over Rum River built?

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

What condition is Csah 25 over Rum River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does Csah 25 over Rum River carry?

About 1,050 vehicles per day (2018 count).

How long is Csah 25 over Rum River?

The structure is 66 ft (20.1 m) long with a longest span of 26 ft (7.9 m) and a deck 42 ft wide.

Who owns Csah 25 over Rum River?

It is owned by the County Highway Agency.