Coastal Flooding Records & Benchmarks

Bridgeport Harbor
MLLW – 3.6′ = MSL
MLLW – 8.8′ = AGL

Minor Flooding – 8.9 Ft. MLLW
Moderate Flooding – 10.4 Ft. MLLW
Severe Flooding – 11.4 Ft. MLLW

Stamford Hurricane Barrier
Note: MLLW-3.1 Ft. = NGVD
Note: Mean Tide Range: 7.2 Ft.
Barrier Designed to Protect 14.8′ NGVD Ocean Height

Minor Flooding – 9.5 Ft. MLLW (6.4 Ft. NGVD)
Moderate Flooding – 11.1 Ft. MLLW (8.0 Ft. NGVD)
Severe Flooding – 17.1 Ft. MLLW (14.0 Ft. NGVD)

New Haven Harbor
MLLW – 3.3′ = MSL
MLLW – 8.2′ = AGL

Minor Flooding – 8.6 Ft. MLLW
Moderate Flooding – 9.2 Ft. MLLW
Severe Flooding – 10.5 Ft. MLLW

New London Harbor

Note: Mean Tide Range: 2.57 Ft.
MLLW – 1.5′ = MSL
MLLW – 3.8′ = AGL

Minor Flooding – 5.0 Ft. MLLW
Moderate Flooding – 6.0 Ft. MLLW
Major Flooding – 7.75 Ft. MLLW

Historical Benchmarks
New London (in Ft. MLLW)
09/21/38 – 10.58
08/31/54 – 9.58
10/29/12 – 8.04 (Surge: 5.96ft)
11/25/50 – 7.58
09/14/44 – 7.08
09/12/60 – 6.88
11/07/53 – 6.78
08/28/11 – 6.55
10/31/91 – 6.47
11/12/68 – 6.38
01/23/87 – 6.24
12/11/92 – 6.18

Bridgeport (in Ft. MLLW)
10/29/12 – 13.26 (Surge – 7.95ft)
09/21/38 – 12.27
08/28/11 – 12.08 (surge – 4.65ft)
12/11/92 – 12.00
11/07/53 – 11.60
10/31/91 – 11.38
10/25/80 – 10.99
03/29/84 – 10.61
09/27/85 – 10.59
10/19/96 – 10.53
11/12/68 – 10.52
04/16/07 – 10.51
10/22/88 – 10.33
03/14/10 – 10.23

Stamford (in Ft. NGVD)
10/29/2012 – 11.0
09/21/1938 – 11.0
08/24/1893 – 10.3
08/31/1954 – 10.3
12/11/1992 – 10.1
02/06/1978 – 9.8
08/28/2011 – 9.6 (surge – 4.3ft)
11/25/50 – 9.5
11/12/68 – 9.4
10/19/96 – 9.1
10/25/80 – 9.0
10/31/91 – 9.0

New Haven (in Ft. MLLW) Since 2001
10/29/12 – 12.30ft (surge – 8.33ft)
08/28/11 – 11.57ft (surge – 4.65ft)
4/16/07 – 9.78ft

Old Lyme (datum unknown) Since 2001
10/29/12 – 8.06ft
8/28/11 – 6.91ft
4/16/07 – 5.38ft

Current Tide Data
New London
New Haven
Bridgeport

Historical Tide Data
Western Long Island Sound
Stamford Hurricane Barrier (Archive to 1893)
Hurricane Irene Tides

Hurricane Barrier Links
Hurricane Inundation Maps (by city)
Stamford Hurricane Barrier Water Levels & Predicted Tides
New London Hurricane Barrier Water Levels & Predicted Tides
Pawcatuck Hurricane Barrier Water Levels & Predicted Tides

Special thanks to the US Army Corps of Engineers and the National Weather Service in Upton, NY for providing information and data.

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