Structure 100000150166030 · Montgomery County, MD

Md 124 over Whetstone Run

Carries Md 124 over Whetstone Run, 0.447 M S Of Midcounty.

Overall conditionFair

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

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT77 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 77 ft across with 4 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.

Built1986rebuilt 1990
Length77.1 ft23.5 m
Daily traffic23,621counted 2013
Last inspectedMarch 2024every 24 months

Location

StateMaryland
CountyMontgomery
Location0.447 M S Of Midcounty
CarriesMd 124
CrossesWhetstone Run
Coordinates39.15486, -77.18071

Physical Characteristics

MaterialAluminum/Wrought Iron/Cast Iron
DesignCulvert
Total Length77.1 ft (23.5 m)
Max Span9.8 ft (3 m)
Deck Area573.4 sq m
Main Spans4
Year Built1986 (reconstructed 1990)

Traffic

Avg Daily Traffic23,621 (2013)
Lanes On Bridge4

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number100000150166030

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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