Structure 3925 · Ingham County, MI

Harrison Road over Red Cedar River

Carries Harrison Road over Red Cedar River, In The City Of E Lansing.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure5/9 · Fair
Substructure5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT100 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 5/9Substructure 5/9

100 ft end to end, longest span 50 ft. Lengths and the car 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.

Built1937rebuilt 1990
Length99.7 ft30.4 m
Daily traffic18,646counted 2015
Last inspectedMay 2024every 12 months

Location

StateMichigan
CountyIngham
LocationIn The City Of E Lansing
CarriesHarrison Road
CrossesRed Cedar River
Coordinates42.72966, -84.49392

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length99.7 ft (30.4 m)
Max Span49.9 ft (15.2 m)
Deck Width82.7 ft (25.2 m)
Deck Area766.1 sq m
Main Spans2
Year Built1937 (reconstructed 1990)

Traffic

Avg Daily Traffic18,646 (2015)
Truck Traffic5%
Lanes On Bridge4

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 12 months
OwnerCity/Municipal Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000003925

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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