Structure 200000CL0230010 · Carroll County, MD

Naylors Mill Road over Big Pipe Creek

Carries Naylors Mill Road over Big Pipe Creek, 0.41 Mi N Of Md 77.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT110 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

110 ft end to end, longest span 53 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.

Built1947rebuilt 1984
Length109.9 ft33.5 m
Daily traffic24counted 2021
Last inspectedMay 2023every 24 months

Location

StateMaryland
CountyCarroll
Location0.41 Mi N Of Md 77
CarriesNaylors Mill Road
CrossesBig Pipe Creek
Coordinates39.61229, -77.25460

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length109.9 ft (33.5 m)
Max Span53.1 ft (16.2 m)
Deck Width17.4 ft (5.3 m)
Deck Area177.6 sq m
Main Spans2
Year Built1947 (reconstructed 1984)

Traffic

Avg Daily Traffic24 (2021)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number200000CL0230010

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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