Structure 9858 · Olmsted County, MN

I 90 over N Br Root River

Carries I 90 over N Br Root River, 4.0 Mi SW Of Jct TH 63.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT182 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

182 ft end to end, longest span 60 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.

Built1961rebuilt 1984
Length182.1 ft55.5 m
Daily traffic5,824counted 2022
Last inspectedAugust 2024every 24 months

Location

StateMinnesota
CountyOlmsted
Location4.0 Mi SW Of Jct TH 63
CarriesI 90
CrossesN Br Root River
Coordinates43.84413, -92.54161

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length182.1 ft (55.5 m)
Max Span60.0 ft (18.3 m)
Deck Width51.5 ft (15.7 m)
Deck Area871.4 sq m
Main Spans3
Year Built1961 (reconstructed 1984)

Traffic

Avg Daily Traffic5,824 (2022)
Truck Traffic23%
Lanes On Bridge3

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number9858

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