US Bridges

County Road 17 over Grand Portage Creek

Fair

Cook County, Minnesota · At JCT CR 73 · Structure no. 6150001P0000000

Built
1938
87 years old
Condition
Fair
inspected September 2023
Type
Culvert
Steel
Length
52 ft
1 main span
Daily traffic
300
2019 count
Owner
Federal
National Park Service

About this bridge

County Road 17 over Grand Portage Creek is a steel culvert carrying County Road 17 over Grand Portage Creek in Cook County, Minnesota. It was built in 1938, so it is 87 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.

It carries about 300 vehicles a day, projected to reach 360 by 2039. The structure is 52 ft (15.9 m) long and 32 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCounty Road 17
CrossesGrand Portage Creek
LocationAt JCT CR 73
RouteFederal Lands Road 0
CountyCook County
StateMinnesota
Coordinates47.96355, -89.68384
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37 US tons
Inventory rating22 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length52 ft (15.9 m)
Longest span22 ft (6.6 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deck0 ft (0 m)

Traffic and service

Average daily traffic300 (2019)
Projected traffic360 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byIndian Tribal Government
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost$150,000 (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Road 17 over Grand Portage Creek built?

It was built in 1938, making it 87 years old in 2025.

What condition is County Road 17 over Grand Portage Creek 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 2023.

How much traffic does County Road 17 over Grand Portage Creek carry?

About 300 vehicles per day (2019 count).

How long is County Road 17 over Grand Portage Creek?

The structure is 52 ft (15.9 m) long with a longest span of 22 ft (6.6 m) and a deck 32 ft wide.

Who owns County Road 17 over Grand Portage Creek?

It is owned by the National Park Service and maintained by the Indian Tribal Government.