Structure 45003 · Marshall County, MN

Mn 220 over Snake River

Carries Mn 220 over Snake River, 1.5 Mi S Of Jct TH 1.

Overall conditionFair

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

How ratings work
Deck8/9 · Very Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT128 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 7/9Substructure 6/9 · sets the rating

128 ft end to end, longest span 52 ft. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built198046 years old
Length128.0 ft39 m
Daily traffic1,450counted 2018
Last inspectedAugust 2024every 24 months

Location

StateMinnesota
CountyMarshall
Location1.5 Mi S Of Jct TH 1
CarriesMn 220
CrossesSnake River
Coordinates48.17412, -96.99886

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length128.0 ft (39 m)
Max Span52.2 ft (15.9 m)
Deck Width50.2 ft (15.3 m)
Deck Area596.7 sq m
Main Spans3
Year Built1980

Traffic

Avg Daily Traffic1,450 (2018)
Truck Traffic9%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number45003

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.

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