North Deer Island and Delehide Cove Protection and Restoration ...
North Deer Island and Delehide Cove Protection and Restoration ...
North Deer Island and Delehide Cove Protection and Restoration ...
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<strong>Protection</strong> <strong>and</strong> <strong>Restoration</strong> of a<br />
Colonial Waterbird Rookery <strong>and</strong><br />
Salt Marsh at <strong>North</strong> <strong>Deer</strong> <strong>Isl<strong>and</strong></strong> In<br />
West Bay, Texas<br />
Jamie Schubert<br />
Coastal Fisheries Division<br />
Dickinson, Texas<br />
william.schubert@tpwd.state.tx.us
Project Goals <strong>and</strong> Facts<br />
• <strong>Isl<strong>and</strong></strong> is owned <strong>and</strong><br />
managed by<br />
Houston Audubon<br />
• Up 30,000 pairs of<br />
breeding birds <strong>and</strong><br />
18 species have<br />
been counted<br />
utilizing the isl<strong>and</strong><br />
• Includes the formerly<br />
endangered brown<br />
pelican <strong>and</strong><br />
threatened whitefaced<br />
ibis
Project Goals <strong>and</strong> Facts<br />
• To stop or slow<br />
shoreline erosion<br />
on <strong>North</strong> <strong>Deer</strong><br />
<strong>Isl<strong>and</strong></strong><br />
• Erosion has been<br />
measured up to<br />
20 feet per year<br />
on the isl<strong>and</strong><br />
• Marsh <strong>and</strong> isl<strong>and</strong><br />
restoration was a<br />
secondary goal
Project Implementation<br />
9 Years……<br />
• Project planning began in 2000<br />
• Two phases of construction<br />
• Phase I-Spring 2003<br />
• Phase II- Spring 2008
Project Implementation-Phase I<br />
• Total Budget: $920,000<br />
• Partners: TPWD, GBEP, USFWS, TGLO,<br />
Houston Audubon, Reliant Energy<br />
• Project Engineer: URS Corporation<br />
• Project Design: Combination of rock<br />
breakwater, rock armoring <strong>and</strong> rock groins<br />
• Contractor: Bertucci Contracting<br />
• Construction began February 24, 2003-<br />
completed May 11, 2003
Project Implementation-Phase II<br />
• Total Budget: $2,317,972<br />
• Partners: TPWD, GBEP, USFWS, EPA Gulf<br />
of Mexico Program, TCEQ, Houston<br />
Audubon, NRG, Meadows Foundation<br />
• Project Engineer: URS Corporation<br />
• Project Design: Combination of rock<br />
breakwater, rock armoring <strong>and</strong> rock groins<br />
• Contractor: Luhr Brothers<br />
• Construction began December 18, 2007 <strong>and</strong><br />
ended March 15, 2008
Project Design
<strong>North</strong>eastern Revetment<br />
• 1600 linear feet<br />
of rock<br />
revetment<br />
• Reconstructed<br />
2.5 acres of<br />
<strong>North</strong> <strong>Deer</strong><br />
<strong>Isl<strong>and</strong></strong>
<strong>North</strong>western Groin Field<br />
•7 Groins<br />
approximately<br />
200 feet long<br />
•Protect 3100<br />
feet of shoreline<br />
along the<br />
GIWW
Southwestern Rock Breakwater<br />
• 4000 linear<br />
feet<br />
• 3 acres of<br />
marsh<br />
restored<br />
behind the<br />
breakwater
Southeastern Rock Breakwater<br />
• 1800 feet of<br />
rock<br />
breakwater<br />
• 3 acres of<br />
marsh <strong>and</strong><br />
rookery habitat<br />
created behind<br />
the breakwater
Marsh Planting<br />
• ~1 Acre<br />
planted by<br />
volunteers in<br />
the 2008<br />
Marsh Mania<br />
Event<br />
• Remainder<br />
planted by<br />
contractors<br />
(2003 <strong>and</strong><br />
2009)
Volunteer planted marshone<br />
year later
IKE-September 13, 2008<br />
NORTH<br />
DEER<br />
ISLAND
September 15, 2008
Colonial Waterbird Nesting<br />
All Species<br />
•21 Year Average<br />
10,046 pairs<br />
•Without white<br />
ibis eruptions<br />
5,401 pairs<br />
•2008-5,005 pairs<br />
•2009-6,347 pairs<br />
•2010-6,028 pairs<br />
35000<br />
30000<br />
25000<br />
20000<br />
15000<br />
10000<br />
5000<br />
0<br />
Total Nesting Pairs
Colonial Waterbird Nesting<br />
Brown Pelicans<br />
Brown Pelicans began<br />
nesting on <strong>North</strong> <strong>Deer</strong><br />
<strong>Isl<strong>and</strong></strong> in 1999<br />
Nesting Pairs<br />
2000<br />
1800<br />
1600<br />
1400<br />
1200<br />
1000<br />
800<br />
600<br />
Brown Pelican<br />
400<br />
200<br />
0<br />
1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010<br />
2009 Highest<br />
nesting count-<br />
1872 Pairs
Colonial Waterbird Nesting<br />
Ground Nesters<br />
600<br />
500<br />
Ground Nesters<br />
Royal Tern<br />
Forster's Tern<br />
Nesting Pairs<br />
400<br />
300<br />
200<br />
Oystercatcher<br />
100<br />
0<br />
1990 1992 1994 1996 1998 2000 2002 2004 2006
Shoreline Recovery
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