Structure 100000150076011 · Montgomery County, MD

US 29 NB over Paint Branch

Carries US 29 NB over Paint Branch, 0.87 Mile North Of Md 650.

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 overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT365 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

365 ft end to end, longest span 140 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.

Built1957rebuilt 1990
Length365.2 ft111.3 m
Daily traffic66,948counted 2023
Last inspectedAugust 2023every 24 months

Location

StateMaryland
CountyMontgomery
Location0.87 Mile North Of Md 650
CarriesUS 29 NB
CrossesPaint Branch
Coordinates39.05079, -76.97979

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length365.2 ft (111.3 m)
Max Span140.1 ft (42.7 m)
Deck Width52.2 ft (15.9 m)
Deck Area1769.7 sq m
Main Spans3
Year Built1957 (reconstructed 1990)

Traffic

Avg Daily Traffic66,948 (2023)
Truck Traffic8%
Lanes On Bridge3

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number100000150076011

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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