US Bridges

Csah 29 over Dora Lake Channel

Fair

Itasca County, Minnesota · 0.4 MI E of JCT Csah 26 · Structure no. 31534

Built
1997
28 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
225 ft
4 main spans
Daily traffic
223
2022 count
Owner
County
County Highway Agency

About this bridge

Csah 29 over Dora Lake Channel is a prestressed concrete tee beam carrying Csah 29 over Dora Lake Channel in Itasca County, Minnesota. It was built in 1997, so it is 28 years old, younger 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 223 vehicles a day, projected to reach 230 by 2042. The structure is 225 ft (68.7 m) long and 48 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCsah 29
CrossesDora Lake Channel
Location0.4 MI E of JCT Csah 26
RouteCounty Highway 29
CountyItasca County
StateMinnesota
Coordinates47.73942, -94.05015
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.3 US tons
Inventory rating44.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadHS 25 or greater
Structure length225 ft (68.7 m)
Longest span56 ft (17.2 m)
Deck width48 ft (14.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic223 (2022)
Projected traffic230 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.7 mi (14 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$1,000 million (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 29 over Dora Lake Channel built?

It was built in 1997, making it 28 years old in 2025.

What condition is Csah 29 over Dora Lake Channel 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 November 2023.

How much traffic does Csah 29 over Dora Lake Channel carry?

About 223 vehicles per day (2022 count).

How long is Csah 29 over Dora Lake Channel?

The structure is 225 ft (68.7 m) long with a longest span of 56 ft (17.2 m) and a deck 48 ft wide.

Who owns Csah 29 over Dora Lake Channel?

It is owned by the County Highway Agency.