IS 495
IS 495 in 0.6 Mile East Of Md 355, Montgomery County, Maryland received a condition grade of F (0/100). Built in 1958, the bridge carries 238K vehicles daily on IS 495 over BR Of Rock Creek. It is classified as structurally deficient.
Component Ratings
The riding surface — evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
IS 495 is a 68-year-old bridge located 0.6 Mile East Of Md 355 in Montgomery County, Maryland. The bridge carries IS 495 over BR Of Rock Creek with 4 traffic lanes, handling approximately 238K vehicles per day. Built in 1958 and reconstructed in 1964, the structure spans 6.7 meters.
The bridge received a Condition Grade of F (0/100) based on Federal Highway Administration inspection data. Its deck is rated 0/9 (serious), superstructure 0/9 (serious), and substructure 0/9 (serious). The bridge is classified as structurally deficient, meaning at least one major component is rated 4 or below — this signals a need for repair or replacement but does not necessarily indicate an immediate safety hazard.
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
IS 495 has a Condition Score of 0/100 (Grade F). Its deck is rated 0/9, superstructure 0/9, and substructure 0/9 on the NBI scale. The bridge is classified as structurally deficient.
IS 495 was built in 1958 and reconstructed in 1964, making it 68 years old. The average bridge age in the United States is 48 years.
IS 495 carries approximately 238K vehicles per day (average daily traffic). The bridge has 4 traffic lanes. It is 6.7 meters long and located on IS 495 in 0.6 Mile East Of Md 355, Montgomery County, Maryland.
Yes, IS 495 is classified as structurally deficient because at least one of its primary components (deck, superstructure, or substructure) is rated 4 or below on the 0-9 NBI scale. This does not necessarily mean it is unsafe, but it requires significant repair or replacement.
IS 495 is located 0.6 Mile East Of Md 355 in Montgomery County, Maryland. The bridge carries IS 495 over BR Of Rock Creek. Its coordinates are 39.011464, -77.092094. It is maintained by State Highway Agency.
IS 495 carries IS 495 over BR Of Rock Creek. The bridge is 6.7 meters long and was built in 1958, with reconstruction in 1964.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.