Structure 300000M-V160013 · Montgomery County, MD

Md 200 (icc) EB over US 29 & Ramp SE Nb&eb

Carries Md 200 (icc) EB over US 29 & Ramp SE Nb&eb, 0.7 Mi W Of Briggs Chaney.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT358 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

358 ft end to end, longest span 185 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.

Built201115 years old
Length357.9 ft109.1 m
Daily traffic21,522counted 2019
Last inspectedSeptember 2023every 24 months

Location

StateMaryland
CountyMontgomery
Location0.7 Mi W Of Briggs Chaney
CarriesMd 200 (icc) EB
CrossesUS 29 & Ramp SE Nb&eb
Coordinates39.07803, -76.95333

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length357.9 ft (109.1 m)
Max Span185.0 ft (56.4 m)
Deck Width73.2 ft (22.3 m)
Deck Area2432.9 sq m
Main Spans2
Year Built2011

Traffic

Avg Daily Traffic21,522 (2019)
Truck Traffic4%
Lanes On Bridge3
Lanes Under Bridge10

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number300000M-V160013

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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