Structure F218 · Cook County, MN

IRR Route 17 over Grand Portage Creek

Carries IRR Route 17 over Grand Portage Creek, 0.2 Km East Of Mt Rose.

Overall conditionFair

Set by its lowest-rated component: Culvert at 6 of 9.

How ratings work
Culvertsets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
20 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 20 ft across. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights, so those are drawn as typical for a culvert.

Built193591 years old
Length20.0 ft6.1 m
Daily traffic296counted 2023
Last inspectedOctober 2023every 24 months

Location

StateMinnesota
CountyCook
Location0.2 Km East Of Mt Rose
CarriesIRR Route 17
CrossesGrand Portage Creek
Coordinates47.96359, -89.68364

Physical Characteristics

MaterialSteel
DesignCulvert
Total Length20.0 ft (6.1 m)
Max Span20.0 ft (6.1 m)
Deck Width28.5 ft (8.7 m)
Deck Area53.1 sq m
Main Spans1
Year Built1935

Traffic

Avg Daily Traffic296 (2023)
Truck Traffic30%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerBureau of Indian Affairs
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number00000000000F218

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

Nearby Bridges