Structure 2703 · Genesee County, MI

Silver Lake Road over Lobdell Lake Dam

Carries Silver Lake Road over Lobdell Lake Dam, E Of South Leg Of Seymour.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT34 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

34 ft end to end. 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 tee-beam bridge.

Built192997 years old
Length34.1 ft10.4 m
Daily traffic10,073counted 2018
Last inspectedMay 2023every 24 months

Location

StateMichigan
CountyGenesee
LocationE Of South Leg Of Seymour
CarriesSilver Lake Road
CrossesLobdell Lake Dam
Coordinates42.79147, -83.84465

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length34.1 ft (10.4 m)
Max Span31.8 ft (9.7 m)
Deck Width52.8 ft (16.1 m)
Deck Area167.4 sq m
Main Spans1
Year Built1929

Traffic

Avg Daily Traffic10,073 (2018)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerOther Local Agencies
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000002703

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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