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Army Corps Project
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MxB Project
12/12/07 Photos from area
Some great photos from a Bethany resident
Article re Sea Colony replenishment
Delaware's Restored Beaches Win National Award
Diagram of proposal for Middlesex Beach/Sea Colony
Bethany Website Replenishment Updates
Powerpoint Presentation of Dr. Wendy Carey (U Del) to the Board 11/12/2005
(20 MB; your best bet is right click, Save Target As)
Diagram of proposal for Middlesex Beach/Sea Colony
NGVD vs NAVD:
Some charts use NGVD elevation, and some use NAVD (both are North American standards; other continents use their own systems).
Suffice it to say that NAVD is the newer one, and the difference between the 2 standards varies depending on where you are in the US-
it can be up to 10 feet.
NOAA has a webpage that converts from one standard to the other.
For Middlesex Beach (N 38deg 31.33'; W75deg 3.23'), an elevation of NGVD 10.48' (the manhole cover at Dune and Bridge Roads) is NAVD 9.70'.
Mean Low Water is -1.6' NGVD, or -2.4 NAVD.
Some documents show a planned beach elevation of 8.5' NGVD;
others show a planned elevation of 7.0' NAVD-these are NOT the same elevation.
For more on this topic, see:
Why, according to NOAA
How to convert
An insanely detailed discussion of the differences
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