Structure 30795 · Roanoke County, VA

Old Mill Plant. over Back Creek

Carries Old Mill Plant. over Back Creek, 0.01-rt 221; 0.40-rt 1482.

Overall conditionGood

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

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT86 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 86 ft across with 3 openings. 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, so those are drawn as typical for a culvert.

Built200620 years old
Length85.6 ft26.1 m
Daily traffic80counted 2013
Last inspectedJune 2024every 24 months

Location

StateVirginia
CountyRoanoke
Location0.01-rt 221; 0.40-rt 1482
CarriesOld Mill Plant.
CrossesBack Creek
Coordinates37.19778, -80.07972

Physical Characteristics

MaterialSteel
DesignCulvert
Total Length85.6 ft (26.1 m)
Max Span25.9 ft (7.9 m)
Deck Width38.1 ft (11.6 m)
Deck Area302.8 sq m
Main Spans3
Year Built2006

Traffic

Avg Daily Traffic80 (2013)
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000030795

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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