Structure 9431 · Hennepin County, MN

Mn 100 over W 70th ST

Carries Mn 100 over W 70th ST, 0.9 Mi S Of Jct TH 62.

Overall conditionFair

Set by its lowest-rated component: Deck and Substructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT192 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 5/9 · sets the rating

192 ft end to end, longest span 94 ft: about 3 semi-trucks nose to tail. 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.

Built197749 years old
Length192.3 ft58.6 m
Daily traffic59,679counted 2022
Last inspectedMay 2023every 24 months

Location

StateMinnesota
CountyHennepin
Location0.9 Mi S Of Jct TH 62
CarriesMn 100
CrossesW 70th ST
Coordinates44.87624, -93.35052

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length192.3 ft (58.6 m)
Max Span93.8 ft (28.6 m)
Deck Width122.0 ft (37.2 m)
Deck Area2179.9 sq m
Main Spans2
Year Built1977

Traffic

Avg Daily Traffic59,679 (2022)
Truck Traffic3%
Lanes On Bridge6
Lanes Under Bridge7

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number9431

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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