Structure 5610 · Lenawee County, MI

Brazee RD over Black Creek

Carries Brazee RD over Black Creek, 0.4 Mi W Of Knight HWY.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
23 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

23 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 slab bridge.

Built1965rebuilt 2006
Length23.0 ft7 m
Daily traffic86counted 2013
Last inspectedJune 2023every 24 months

Location

StateMichigan
CountyLenawee
Location0.4 Mi W Of Knight HWY
CarriesBrazee RD
CrossesBlack Creek
Coordinates41.94921, -84.09484

Physical Characteristics

MaterialWood or Timber
DesignSlab
Total Length23.0 ft (7 m)
Max Span21.0 ft (6.4 m)
Deck Width31.2 ft (9.5 m)
Deck Area66.5 sq m
Main Spans1
Year Built1965 (reconstructed 2006)

Traffic

Avg Daily Traffic86 (2013)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000005610

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