DNREC Building Line maps
DNREC's Coastal Connection newsletter (Fall 09)
Sea Level Trends
Tidal Datums
Article re Sea Colony replenishment
Delaware's Restored Beaches Win National Award
Diagram of proposal for Middlesex Beach/Sea Colony
Bethany Website Replenishment Updates
American Shore and Beach Preservation Association
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
Beach Preservation Act
American Shore and Beach Preservation Association
Surfrider Foundation
NOAA webpage re Beach Nourishment
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
Outside links:
What is a Coastal Storm?
1989 Wash Post article re Beach Renourishment
1998 Wash Post article re Beach Renourishment
Bethany/South Bethany Replenishment Consultants
DNREC Dune Crossing Application
DNREC Dune Crossings Info
"Beach Rebuilding rides a popular wave"
-Wash Post-7/22/89
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