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Nearby Bridges in NBI 2021: 1


US ROUTE 1 over MYSTIC RIVER (Route: 1)
Num:362x
Open: no restriction [A]
Built: 1922, Reconstructed: 2002
Historic: Bridge is on the NRHP. [1]

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Rough Distance: 0 Miles (0 Kilometers)

Bridge Type
Main Span(s): Steel [3] Movable - Bascule [16]
Approach Span(s): Steel [3] Girder and floorbeam system [03]
Deck: Open Grating [3] with Wearing Surface:
Bridge Dimensions
Length: 67.1 m = 220.2 ft
Main Spans: 1 at 25.9 m = 85.0 ft
Approach Spans: 3
Skew: 0
Width, Roadway: 10.1 m = 33.1 ft (2 Lanes) and Out-To-Out: 10.5 m = 34.5 ft for a 10.1 m = 33.1 ft approaching roadway.
Vertical Clearance: 3.96 m = 13.0 ft and Navigational Clearance: 1.2 m = 3.9 ft
Location
Groton [34250]: New London County [011], Connecticut [09]
Owned by State Highway Agency [01], DOT District: 2
.5 MILES EAST OF SR 614
Condition
Deck: Satisfactory [6]
Superstructure: Satisfactory [6]
Substructure: Satisfactory [6]
Loading
Design:
Operating: 26.6 metric ton = 29.3 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Inventory: 20.4 metric ton = 22.4 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Basically intolerable requiring high priority of corrrective action [3]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Better than present minimum criteria [7] and Bridge is scour critical; bridge foundations determined to be unstable. [3]
Inspections
Date: May 1999 [599] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 0.5 km = 0.3 mi
Traffic
ADT: 11800 (2015) and Trucks: 6%
Future ADT: 17534 (In 2035 )

Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S  - Dismantled and/or in storage. L -  Severe loss of historic integrity due to alteration.

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