US Bridges

CR 105 over Gull Lake Res.

FairPosted for load

Cass County, Minnesota · 0.1 MI N of JCT Csah 70 · Structure no. 000000000007435

Built
1913
112 years old, rebuilt 1971
Condition
Fair
inspected July 2024
Type
Arch - Deck
Concrete Continuous
Length
75 ft
7 main spans
Daily traffic
450
2020 count
Owner
Federal
Corps of Engineers (Civil)

About this bridge

CR 105 over Gull Lake Res. is a concrete continuous arch - deck carrying CR 105 over Gull Lake Res. in Cass County, Minnesota. It was built in 1913 and reconstructed in 1971, so it is 112 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 450 vehicles a day, roughly 3% of them trucks, projected to reach 180 by 2044. The structure is 75 ft (22.8 m) long and 17 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCR 105
CrossesGull Lake Res.
Location0.1 MI N of JCT Csah 70
RouteCounty Highway 105
CountyCass County
StateMinnesota
Coordinates46.41103, -94.35339
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, 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 inspectionJuly 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating30.8 US tons
Inventory rating21.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadUnknown
Structure length75 ft (22.8 m)
Longest span11 ft (3.3 m)
Deck width17 ft (5.2 m)
Roadway width10 ft (3.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2020)
Projected traffic180 by 2044
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCorps of Engineers (Civil)
Maintained byCorps of Engineers (Civil)
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$140,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 105 over Gull Lake Res. built?

It was built in 1913, making it 112 years old in 2025. It was reconstructed in 1971.

What condition is CR 105 over Gull Lake Res. 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 July 2024.

How much traffic does CR 105 over Gull Lake Res. carry?

About 450 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is CR 105 over Gull Lake Res.?

The structure is 75 ft (22.8 m) long with a longest span of 11 ft (3.3 m) and a deck 17 ft wide.

Who owns CR 105 over Gull Lake Res.?

It is owned by the Corps of Engineers (Civil).