US Bridges

Csah 7 over Lost River

FairPosted for load

Clearwater County, Minnesota · 0.1 MI N of JCT Csah 48 · Structure no. 7249

Built
1959
66 years old
Condition
Fair
inspected September 2024
Type
Slab
Wood or Timber
Length
62 ft
3 main spans
Daily traffic
245
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 7 over Lost River is a wood or timber slab carrying Csah 7 over Lost River in Clearwater County, Minnesota. It was built in 1959, so it is 66 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. Its operating status is: posted for load restriction.

It carries about 245 vehicles a day, projected to reach 245 by 2039. The structure is 62 ft (18.9 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCsah 7
CrossesLost River
Location0.1 MI N of JCT Csah 48
RouteCounty Highway 7
CountyClearwater County
StateMinnesota
Coordinates47.78338, -95.51664
Functional classRural Minor 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.
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
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 alignment7: Better than present minimum criteria
Operating rating52.6 US tons
Inventory rating26.6 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 20
Structure length62 ft (18.9 m)
Longest span22 ft (6.7 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic245 (2019)
Projected traffic245 by 2039
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 7 over Lost River built?

It was built in 1959, making it 66 years old in 2025.

What condition is Csah 7 over Lost 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 September 2024.

How much traffic does Csah 7 over Lost River carry?

About 245 vehicles per day (2019 count).

How long is Csah 7 over Lost River?

The structure is 62 ft (18.9 m) long with a longest span of 22 ft (6.7 m) and a deck 30 ft wide.

Who owns Csah 7 over Lost River?

It is owned by the County Highway Agency.