US Bridges

Csah 13 over W Br Rum River

PoorPosted for load

Mille Lacs County, Minnesota · 1.1 MI E of JCT Csah 5 · Structure no. 48509

Built
1971
54 years old
Condition
Poor
inspected June 2024
Type
Slab
Wood or Timber
Length
104 ft
4 main spans
Daily traffic
640
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 13 over W Br Rum River is a wood or timber slab carrying Csah 13 over W Br Rum River in Mille Lacs 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 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 640 vehicles a day, projected to reach 530 by 2038. The structure is 104 ft (31.7 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCsah 13
CrossesW Br Rum River
Location1.1 MI E of JCT Csah 5
RouteCounty Highway 13
Coordinates45.62574, -93.63181
Functional classRural Minor 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
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating34.4 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadHS 20
Structure length104 ft (31.7 m)
Longest span26 ft (7.9 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic640 (2018)
Projected traffic530 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 13 over W Br Rum River built?

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

What condition is Csah 13 over W Br 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 13 over W Br Rum River carry?

About 640 vehicles per day (2018 count).

How long is Csah 13 over W Br Rum River?

The structure is 104 ft (31.7 m) long with a longest span of 26 ft (7.9 m) and a deck 34 ft wide.

Who owns Csah 13 over W Br Rum River?

It is owned by the County Highway Agency.