Structure 9224 · Saginaw County, MI

State Road over Tittabawassee River

Carries State Road over Tittabawassee River, 0.9 Mi E Of River Road.

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
SEMI-TRUCK · 72 FT354 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

354 ft end to end, longest span 71 ft: about 5 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.

Built1979rebuilt 2006
Length354.0 ft107.9 m
Daily traffic10,588counted 2011
Last inspectedAugust 2023every 24 months

Location

StateMichigan
CountySaginaw
Location0.9 Mi E Of River Road
CarriesState Road
CrossesTittabawassee River
Coordinates43.43724, -84.04650

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length354.0 ft (107.9 m)
Max Span70.9 ft (21.6 m)
Deck Width51.8 ft (15.8 m)
Deck Area1704.8 sq m
Main Spans5
Year Built1979 (reconstructed 2006)

Traffic

Avg Daily Traffic10,588 (2011)
Truck Traffic5%
Lanes On Bridge3

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalUnknown
Structure Number000000000009224

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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