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"!
"!
"!
Mid Survey Boundary
PA 63 Boundary
East Survey Boundary
West Survey Boundary
"!
Post-Contruction Live SeagrassWithin PA 63 Boundary
Approximately 150.35 Acres
Approximate Areaof Seagrass Impacts
27.33 Acres
Approximate Extentof Dredge Material
40.69 Acres
Approximate Originof Dredge Material
Survey Boundary
Transect 1
Transect 2
Transect 3
«5«5
«4
«3
«1
«0
«0«0
«0
«0«0«0«0«0«0«0«0«0«0«0«0«0«0«0«0«0«0«0«0«0
«5
«5
«4
«4
«3
«3
«2
«0«0
«0«0
«0
«0
«0«0«0«0«0«0«0«0«0«0«0«0
«0«00.8
0.1
0.3
0.01.4
1.11.11.41.41.82.53.33.1
-0.5 -0.4-1.2
-1.6-1.9 -2.3
-3.6-3.6-3.4-3.3-3.2-3.0-3.0-2.4-2.1-1.9-1.9-1.7-1.6-1.5-1.2-0.5
-0.3
-0.1-0.2
-0.1-0.1
-3.0-2.8-2.3-1.8-1.3-1.3-1.0-0.9-0.9
-0.6-0.5-0.1
-0.2
-0.7
0.22.4
0.1
0.6
0.91.11.21.41.62.02.83.2-1.9
-0.2-0.1
-0.4-0.8
-0.8
-1.4
-0.1
-1.2
-2.0-2.2
-1.7-1.6
-0.7
-2.6
-3.6-3.5-3.5-3.3-3.3-3.1-3.0-2.6-2.1-2.0-2.0-1.8
-0.2-0.1
-0.2-0.1
-0.1
-0.1-0.1
-3.0-2.9-2.5-2.1-1.7-1.4-1.1-1.0-0.8-0.8-0.7-0.7-0.4
xxxxx0
.0(0.2/d
m)
hhh1.0
(0.0/s)
HHH1.0(0.0
/s)
hxh0.8
(0.0/s)
hhh1.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.1/m)
xxx0.0
(0.4/m)
xxx0.0
(0.4/m)
xxx0.0
(0.4/m)
xxx0.0
(0.4/m)
xxx0.0
(0.3/m)
xxx0.0
(0.2/m)
xxx0.0
(0.6/m)
xxx0.0
(0.3/s)
xxx0.0
(0.0/s)
xxx0.0
(0.1/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/S)
xxx0.0
(0.0/S)
hhh0.8
(0.1/S)
HHH0.8(0.1
/S)
HHH0.4(0.5
/M)
xxx0.0
(0.0/s)
xxx0.0
(0.0/rk)
H+H+H+1.0(0.0
/s)
HHH1.0(0.1
/S)
HHH0.4(0.0
/s)
hhh1.0
(0.0/s)
HHH0.6(0.1
/S)
hhh0.9
(0.1/S)
xxh1.0
(0.0/s)
xhx0.4
(0.0/s)
xxh0.2
(0.2/S)
xxx0.3
(0.0/S)
xxx0.0
(0.0/s)
xxx0.0
(1.0/m)
xxx0.0
(0.2/m)
xxx0.0
(0.2/m)
xxx0.0
(0.3/m)
xxx0.0
(0.3/m)
xxx0.0
(0.5/m)
xxx0.0
(0.2/m)
xxx0.0
(0.4/m)
xxx0.0
(0.3/m)
xxx0.0
(0.6/m)
xxx0.0
(0.2/s)
xxx0.0
(0.2/s)
xxx0.0
(0.2/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/sh)
H+H+H+1.0(0.0
/s)
HH+H+H+1.0(0.0
/s)
sl0.0(0
.0/s)
hhh0.5
(0.1/s)
hxh0.5
(0.0/s)
xxx0.0
(0.1/s)
Hhh0.5(0
.0/s)
hhh0.4
(0.1/s)
xxx0.0
(0.0/s)
HHH+0.5(0.0
/s)
xxx0.0
(0.0/rk)
xxx0.0
(0.8/dm
)
xxx0.0
(0.7/dm
)
xxx0.0
(1.2/dm
)
xxx0.0
(0.9/dm
)
xxx0.0
(0.8/dm
)xxx0.0
(0.8/dm
)
xxx0.0
(1.0/dm
)
xxx0.0
(0.6/dm
)
xxx0.0
(2.4/dm
)
xxx0.0
(2.4/dm
)
xxx0.0
(2.4/dm
)
xxx0.0
(1.0/dm
)
xxx0.0
(0.1/dm
)
xxx0.0
(0.0/dm
)
xxx0.0
(0.0/dm
)
hdxhd1
.4(1.0/d
m)
hdxhd1
.0(0.6/d
m)
hdhdhd
1.4(0.8
/dm)
hdhdhd
1.2(0.7
/dm)
HHH0.5(0.0
/s)hhh
0.4(0.1
/s)
hhh0.4
(0.0/s)hhx
0.5(0.1
/s)
hhh0.4
(0.1/s)
xhx0.1
(0.1/s)
xxx0.0
(0.1/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/wd)
xxx0.0
(0.8/dm
)
xxx0.0
(0.9/dm
)
xxx0.0
(1.0/dm
)
xxx0.0
(1.1/dm
)
xxx0.0
(0.8/dm
)xxx0.0
(0.8/dm
)
xxx0.0
(0.8/dm
)
xxx0.0
(0.8/dm
)
xxx0.0
(0.7/dm
)
xxx0.0
(2.3/dm
)
xxx0.0
(2.4/dm
)
xxx0.0
(2.4/dm
)
xxx0.0
(2.4/dm
)
xxx0.0
(0.3/dm
)
xxx0.0
(0.0/dm
)
xxx0.0
(0.0/dm
)
hdxx1.3
(0.9/dm
)
xxhd1.
2(0.9/dm
)
xdmx1.5
(0.9/dm
)
H+H+H+0.6(0.0
/s)
xhdhd1
.4(1.0/dm
)
hdhdhd
1.0(0.7
/dm)
Figure 4a: Data Overview MapSeagrass Survey Area
Corps of Engineers GIWW PA63, Galveston County, Texas
0= Species absent from quadrat0.1=Species represented by a solitary short shoot, <5% cover0.5=Species represented by a few (<5%) short shoots, <5% cover1= Species represented by many (>5%) short shoots, <5% cover2= Species represented by many (>5%) short shoots, 5%-25% cover3= Species represented by many (>5%) short shoots, 25%-50% cover4= Species represented by many (>5%) short shoots, 50%-75% cover5= Species represented by many (>5%) short shoots, 75%-100% cover
Seagrass Data KeyBraun-Blanquet Abundance Scores
Notes:-Base map source: 0.5-meter NAIP Imagery obtained online from TNRIS; Galveston County, 2009.-Prepared by Belaire Environmental, Inc December 12, 2012 (JZG).-Elevation data obtained with RTK GPS and provided in NAVD 88 datum.-For planning purposes only; not for construction.-Segrass survey performed from Novermber 15 to November 19, 2012.-Location of dredge material approximated using Pictometry aerial photography from January 28, 2012, and data taken at observation points in the field.
0 1,000 2,000 3,000 4,000Feet¯
Seagrass Species:h= Shoal grass (Halodule wrightii)c= Clover grass (Halophila englemannii)Substrate:s= Sandm= Mudrk= Rocko= Oysterdm= Dredge MaterialDredge Material Key:hd= Presence of SeagrassRoots & Rhizomes (dead Halodule)
Belaire Environmental, Inc. Data Key
GIWW
"!
Post-Contruction Live SeagrassWithin PA 63 Boundary
Approximately 150.35 Acres
Survey Boundary
Approximate Extentof Dredge Material
27.27 Acres
Approximate Originof Dredge Material
GIWW
Approximate Areaof Seagrass Impacts
16.57 Acres
Transect 4
Transect 5
«5«3
«0«0
«0«0
«0«0
«0«0
«0«0
«0«0
«0
«0«0«0
«0
«3
«0
«0«0
«0«0
«0«0
«0«0
«0«0
«0«0«0«0
«00.7
0.80.9
0.20.20.2
1.03.4
0.50.00.0
1.4
-1.7-1.6-1.7
-1.5-1.6
-1.3-1.2
-1.2-1.0
-0.9-0.7
-0.5-0.4-0.4
-1.7-1.7
-1.5-1.4
-1.2-1.3
-1.1-0.9
-0.7-0.8
-0.3-0.2
-2.5-2.3
-2.0-2.0
-1.7-1.8
-1.8-1.6
-1.5-1.4
-1.2-1.1
-0.7-0.4
-0.1
-0.5-0.4
-2.7-2.5
-2.1-2.0
-1.9-1.8
-1.9-1.7
-1.6-1.5
-1.3-1.2
-1.2
xxx0.0
(0.3/s)
xxx0.0
(0.3/s)
xxx0.0
(0.0/s)
xxx0.0
(0.4/dm
)
xxx0.0
(0.4/dm
)
xxx0.0
(0.5/dm
)xxx
0.0(0.4
/dm)
xxx0.0
(1.2/dm
)
xxx0.0
(2.0/dm
)
xhdx5.0
(0.5/dm
)xhd
x0.6(0.5
/dm)
hdhdhd
0.8(0.8
/dm)
hdhdhd
0.8(0.8
/dm)
hdhdhd
0.6(0.6
/dm)
hdhdhd
0.2(0.2
/dms)
xxx0.0
(0.3/s)
xxx0.0
(0.1/s)
hxx0.4
(0.6/dm
)
xxx0.0
(0.4/dm
)
xxx0.0
(0.4/dm
)
xxx0.0
(0.6/dm
)
xxx0.0
(0.5/dm
)xxx0.0
(1.0/dm
)
hdxx0.6
(0.6/dm
)
hdhdx0
.4(0.6/dm
)
sasasa
0.5(0.3
/dm)
hdhdhd
0.8(0.8
/dm)hdh
dhd1.0
(1.0/dm
)
hdhdhd
1.1(0.9
/dm)
hdhdhd
0.2(0.2
/dms)
hdhdhd
0.4(0.2
/dms)
hdhdhd
1.0(0.3
/dms)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.1/s)
xxx0.0
(0.2/m)
xxx0.0
(0.1/m)
xxx0.0
(0.3/m)
xxx0.0
(0.1/s)
xxx0.0
(0.2/m)
xxx0.0
(0.2/s)
xxx0.0
(0.1/s)
xxx0.0
(0.0/s)
xxx0.0
(0.2/s)hhH
0.6(0.0
/s)xxx
0.0(0.0
/s)bf0.
0(0.0/sh)
xxx0.0
(0.0/wd)
H+H+H+0.8(0.0
/s)
HHH0.6(0.0
/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.1/s)
xxx0.0
(0.1/m)
xxx0.0
(0.1/s)
xxx0.0
(0.2/m)
xxx0.0
(0.1/s)
xxx0.0
(0.3/m)
xxx0.0
(0.1/s)
xxx0.0
(0.0/s)
xxx0.0
(0.1/s)
xxx0.0
(0.1/s)xxx
0.0(0.0
/s)
hhh1.0
(0.4/dm
)
xxx0.0
(0.0/wd)
H+H+H+0.7(0.0
/s)xxx0.0
(0.0/rk/
wd)
"!
«0
Post-Contruction Live SeagrassWithin PA 63 Boundary
Approximately 150.35 Acres
Approximate Areaof Seagrass Impacts
48.04 Acres
Approximate Extentof Dredge Material
47.59 Acres
Approximate Originof Dredge Material
GIWW
Approximate Area ofSeagrass Recolonization
1.86 Acres
Survey Boundary
Transect 6
Transect 7
Transect 8
Transect 9
Area of SeagrassRecolonization
«5«5
«5«5
«5«5
«5«5
«5«5
«5
«4
«3«2
«2
«2
«2
«1
«1
«0
«0
«0«0
«0
«0«0
«0«0
«0
«0«0
«0«0
«0«0
«0«0
«0
«0«0
«0«0
«0«0
«0
«0«0
«5«5
«5
«4«4
«4
«4
«3«3
«3
«3«3
«2«2
«2
«2
«1
«0
«0«0
«0«0
¬«0
¬«0
¬«0
¬«0
¬«0
¬«0
¬«0
¬«0
¬«0
¬«0
«0«0
«0«0
«0«0
«0«0
«0«0
«0
«0«0
«0«0
«0«0
«0«0
«0«0
«00.0
0.10.1
0.50.5
0.70.5
0.30.0
0.10.2
0.30.6
0.60.7
1.0
0.6
0.51.2
0.10.1
0.30.5
0.70.5
0.20.3
0.5
0.10.7
0.00.0
0.20.4
0.6
1.6
-2.5-2.2-2.1-1.8
-0.1
-3.0-2.3-2.3-2.1
-1.8-1.5
-1.0-1.0
-1.0-1.1-1.0
-1.1-0.9-1.1
-1.1-0.9-0.5-0.3
-0.2
-1.0-1.0
-0.4
-1.2-1.0
-0.9
-0.2
-2.0-1.7
-1.0
-1.1-0.9
-1.0-0.7-0.7
-2.3
-1.5
-2.9-2.3-2.0-2.1
-1.3-1.3-1.3-1.2-1.0-0.9-0.8-0.8-0.8-0.7-0.7-0.6-0.7-0.4-0.4-0.5-0.2-0.3-0.3-0.1-0.1-0.2
-3.4-2.6
-2.6-2.6-2.4-2.4-2.2-1.7-1.4-0.9
-0.9-1.0-0.8-0.8-1.1-0.8
-0.8-0.8-0.7-1.0-0.8-0.7
-0.6-1.0-1.5
-2.3-1.9
-1.6-0.8
-0.8-0.7-0.7
-0.6-0.5
-0.3
-1.2-0.9-0.9-0.9-0.8-0.7-0.8-0.9-1.0-0.8-0.9
-0.8
-2.0
-1.6-1.9
-1.0-0.8
-0.1
-0.9
-0.4
-1.2
-2.6-2.2-2.5
-0.2-0.8
-1.8
-3.2-2.8-2.5-2.4-2.4-2.3
-1.4-0.8
-0.7-0.7
-0.6-0.5-0.2-0.2
-0.2
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
XXX0.0(0.0
/S)
XXX0.0(0.0
/S)
xxx0.0
(0.0/s)
hhh0.6
(0.0/s)
HHH0.7(0.0
/S)
HHH0.7(0.0
/S)
HHH1.0(0.3
/M)
hhh1.0
(0.3/m)
HHH0.8(0.4
/M)
hhh0.8
(0.5/m)
hhh0.8
(0.4/m)
XXX0.0(1.4
/DM)
XXX0.0(1.8
/DM)
XXX0.0(2.0
/DM)
XXX0.0(1.8
/DM)
XXX0.0(1.6
/DM)
XXX0.0(1.3
/DM)
XXX0.0(1.1
/DM)
hch1.0
(0.3/dm
)hhh1.0
(0.2/dm
)
hxh0.4
(0.2/dm
)
XXhd1.2(1.4
/DM)
H+H+H+0.9(0.0
/S)
H+H+H+1.0(0.0
/S)
H+H+H+1.0(0.1
/S)
H+H+H+1.0(0.3
/M)
H+H+H+1.0(0.3
/DM)
H+H+H+1.0(0.3
/DM)
HHH1.0(0.4
/M)
HHH0.8(0.0
/S)
HHH0.7(0.0
/S)
HHH1.0(0.3
/M)
HHH1.0(0.3
/M)hhh
1.0(0.6
/m)
hhh0.6
(0.0/s)
xxh0.2
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.1/s)
XXX0.0(0.0
/S)
XXX0.0(0.0
/S)
XXX0.0(0.2
/M)
HHH1.0(0.1
/DM)
hhh0.8
(0.5/dm
)
hhh1.0
(0.4/dm
)hhh0.5
(0.2/dm
)
xxx0.0
(0.3/dm
)
xxx0.0
(0.5/dm
)
XXX0.0(2.4
/DM)
XXX0.0(1.9
/DM)
XXX0.0(1.9
/DM)
XXX0.0(1.8
/DM)
XXX0.0(1.3
/DM)
XXX0.0(1.4
/DM)
XXX0.0(0.4
/DM)
hdxx1.3
(0.9/DM)
hdxx1.2
(0.9/DM)
xhdx1.2
(1.4/DM)
XXhd1.4(1.4
/DM)
H+H+H+1.0(0.2
/M)
H+H+H+1.0(0.3
/M)
H+H+H+1.0(0.0
/S)
H+H+H+0.8(0.1
/S)
H+H+H+1.0(0.1
/S)
hdxhd1
.2(0.9/DM)
H+H+H+1.0(0.6
/DM)
hdhdhd
0.9(0.4
/dm)
hdhdhd
1.0(0.5
/dm)
hdhdhd
1.0(0.6
/dm)
hdhdhd
1.2(0.7
/dm)
hdhdhd
1.0(0.7
/dm)
hdhdhd
1.1(0.8
/dm)
hdhdhd
1.2(0.8
/dm)
hdhdhd
1.1(0.9
/dm)
hdhdhd
1.1(0.8
/dm)
hdhdhd
1.2(0.9
/dm)
hdhdhd
1.2(1.4
/DM)
hdhdhd
1.3(1.0
/DM)
hdhdhd
1.4(1.1
/DM)
hdhdhd
1.0(1.1
/DM)
sa0.3(0
.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
hhx0.6
(0.0/s)
hhh0.6
(0.0/s)
HhH0.6(0.0
/s)
ccx0.1
(0.5/m)
Ccx0.1(0.6
/m)
ccc0.2
(0.9/m)
xxx0.0
(0.1/s)xch
0.3(0.4
/m)
xxc0.2
(0.6/m)
cxc0.1
(0.6/m)
xxx0.0
(0.0/s)
HHH0.4(0.0
/s)
HHH0.5(0.0
/s)Hhh0.6(0.0
/s)
hhx0.2
(1.7/dm
)
xhx0.4
(1.5/dm
)
xxx0.0
(1.2/dm
)
xxh0.4
(0.5/dm
)
xxx0.0
(0.4/dm
)
H+H+H0.6(0.4
/m)
H+H+H+0.5(0.0
/s)
H+H+H+0.5(0.0
/s)
H+H+H+0.6(0.2
/s)
H+H+H+0.4(0.2
/m)
H+H+H+0.5(0.3
/m)
H+H+H+0.5(0.3
/m)
H+H+H+0.5(0.6
/m)
H+H+H+0.5(0.4
/m)
H+H+H+0.7(0.6
/m)
hdhdhd
0.8(0.6
/dm)
hdhdhd
1.1(0.9
/dm)
hdhdhd
1.0(0.8
/dm)
hdhdhd
1.1(0.9
/dm)
hdhdhd
1.3(1.0
/dm)
hdhdhd
1.7(1.5
/dm)
hdhdhd
2.0(1.8
/dm)
h/hdhd
hd0.7(0.0
/s)
HHH0.5(0.0
/s)
Hhh0.6(0
.0/s)
hhx0.6
(0.0/s)
xhH0.7
(0.6/m)
xcx0.1
(0.9/m)
xxc0.1
(0.6/m)
xxc0.1
(0.6/m)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.7/m)
xxx0.0
(0.1/s)
xxx0.0
(0.2/m)
xxx0.0
(0.4/m)
xxx0.0
(0.6/m)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
xxx0.0
(0.0/s)
HH+H0.5(0.0
/s)
xhx0.4
(0.5/dm
)
xxx0.0
(0.5/dm
)
xxx0.0
(1.4/dm
)xxx
0.0(0.0
/rk)
H+H+h0.5(0.4
/m)H+HH+0.5(0
.4/m)
xhdx1.8
(1.8/dm
)
H+H+H+0.6(0.1
/s)
H+H+H+0.6(0.2
/s)
H+H+H+0.5(0.3
/m)
H+H+H+0.6(0.5
/m)
H+H+H+0.5(0.4
/m)
H+H+H+0.5(0.4
/m)
H+H+H+0.5(0.4
/m)
H+H+H+0.5(0.4
/m)
H+H+H+0.5(0.4
/m)
hdhdhd
0.5(0.0
/s)
hdhdx0
.6(1.5/dm
)
hdhdhd
0.7(0.2
/dm)
hdhdhd
1.3(0.3
/dm)
hdhdhd
1.1(0.8
/dm)
hdhdhd
1.3(1.1
/dm)
hdhdhd
1.1(1.0
/dm)
hdhdhd
1.2(1.1
/dm)
hdhdhd
1.2(0.9
/dm)
hdhdhd
0.9(0.9
/dm)
hdhdhd
1.9(1.7
/dm)
hdhdhd
1.9(1.8
/dm)
h/hdh/
hdh/hd
1.7(1.9
/dm)
c/hdx/h
dh/hd1.1
(0.9/dm
)
PA 63 BoundaryPA 63 Survey BoundaryPost-Construction Live SeagrassPost-Construction Seagrass ImpactsSeagrass RecolonizationApprox. Dredge Material Boundary
"! Approx. Dredge Material Origin
0 300 600Feet
0 300 600Feet
0 300 600Feet
East Survey Area
West Survey Area
Mid Survey Area
Example: -1.4 hxhd0.6(0.4/S)First number (Drk Blue) is recorded elevation (Ft. NAVD88).Circled number is Braun-Blanquet score (2).h = Post hole grab with shoalgrasshd = Post hole grab with dead shoalgrass rootsx = Post hole grab with bare substrateThe underlined number (0.6) is the deepestdead root found by measuring the post hole grabFirst number in parenthesis is the soft sediment depth (0.4).Last character in parenthesis represents the material found in the post hole grab (S=sand).Braun-Blanquet-Every other observation point (i.e., 20-m intervals) was visually assessed using a 0.25-meter quadrat and given a Braun-Blanquet score (0-5).-Braun-Blanquet scores are shown in circles on the location of the observation point.
Data Set Example«2
