Structure 100000150134010 · Montgomery County, MD

Is 495 over Brunett Avenue

Carries Is 495 over Brunett Avenue, 0.297 Mile West Of US 29.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT143 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 6/9

143 ft end to end, longest span 68 ft. 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.

Built1959rebuilt 2002
Length143.0 ft43.6 m
Daily traffic232,010counted 2009
Last inspectedJune 2023every 24 months

Location

StateMaryland
CountyMontgomery
Location0.297 Mile West Of US 29
CarriesIs 495
CrossesBrunett Avenue
Coordinates39.01642, -77.02206

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length143.0 ft (43.6 m)
Max Span67.9 ft (20.7 m)
Deck Width150.6 ft (45.9 m)
Deck Area2001.2 sq m
Main Spans3
Year Built1959 (reconstructed 2002)

Traffic

Avg Daily Traffic232,010 (2009)
Truck Traffic12%
Lanes On Bridge8
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number100000150134010

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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