A22_W912ES-15-B-0011_Reference_Drawings_Full_Size.pdf
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Notes:
Date of dive - 9/3/13 Pool level on 9/3/13 - 639.2 feet(MSL 1912) "NUMO"=DEPTH BELOW POOL LEVEL(feet).
2005 2006 2007 2008 2009 2010
J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J
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2)
2010 2011 2012 2013 2014 2015
J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J
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LOCK AND DAM 7
UPPER GUIDEWALL CRIB GROUTING
MISSISSIPPI RIVER
POOL ELEVATION HYDROGRAPHS
JANUARY 01 - DECEMBER 31
2005 - 2014
SHEET NUMBER: 1 of 3
LOCK AND DAM 7
HYDROLOGIC INFORMATION
Notes:
1. The daily pool elevation hydrograph is based on ten years of pool elevation observations recorded by the USACE pool gage at Lock and Dam 7 near La Crescent, Minnesota. Daily observations shown above are taken at approximately 8AM Central Standard Time (CST).
2. These elevation hydrographs are based on the best information available. These elevation hydrographs represent the period shown, and do not necessarily represent all possible future conditions. Questions may be addressed to the office of the Corps of Engineers St. Paul, Minnesota.
LOCK AND DAM 7
POOL ELEVATION DURATION CURVES
JANUARY - JUNE
1988 - 2015
SHEET NUMBER: 2 of 3
LOCK AND DAM 7
HYDROLOGIC INFORMATION
Notes:
1. These monthly duration curves were derived using the U.S. Army Corps of Engineers Lock and Dam 7 4-hour pool data for the period January 1988 through April 2015.
2. These elevation duration curves are based on the best information available. These elevation hydrographs represent the period 1988-2015, and do not necessarily represent all possible future conditions. Questions may be addressed to the office of the Corps of Engineers St. Paul, Minnesota.
0 10 20 30 40 50 60 70 80 90 100
E
LE
V A
TI
O
N I
N
FE
E
T (M
.S .L
. 1
2)
PERCENTAGE OF TIME EQUALLED OR EXCEEDED
MARCH
0 10 20 30 40 50 60 70 80 90 100
E
LE
V A
TI
O
N
T (M
.S .L
. 1
2)
PERCENTAGE OF TIME EQUALLED OR EXCEEDED
JUNE
0 10 20 30 40 50 60 70 80 90 100
E
LE
V A
TI
O
N
T (M
.S .L
. 1
2)
PERCENTAGE OF TIME EQUALLED OR EXCEEDED
JANUARY
0 10 20 30 40 50 60 70 80 90 100
E
LE
V A
TI
O
N
T (M
.S .L
. 1
2)
PERCENTAGE OF TIME EQUALLED OR EXCEEDED
APRIL
0 10 20 30 40 50 60 70 80 90 100
E
LE
V A
TI
O
N
T (M
.S .L
. 1
2)
PERCENTAGE OF TIME EQUALLED OR EXCEEDED
FEBRUARY
0 10 20 30 40 50 60 70 80 90 100
E
LE
V A
TI
O
N
T (M
.S .L
. 1
2)
PERCENTAGE OF TIME EQUALLED OR EXCEEDED
MAY
LOCK AND DAM 7
POOL ELEVATION DURATION CURVES
JULY - DECEMBER
1988 - 2015
SHEET NUMBER: 3 of 3
LOCK AND DAM 7
HYDROLOGIC INFORMATION
Notes:
1. These monthly duration curves were derived using the U.S. Army Corps of Engineers Lock and Dam 7 4-hour pool data for the period January 1988 through April 2015.
2. These elevation duration curves are based on the best information available. These elevation hydrographs represent the period 1988-2015, and do not necessarily represent all possible future conditions. Questions may be addressed to the office of the Corps of Engineers St. Paul, Minnesota.
0 10 20 30 40 50 60 70 80 90 100
E
LE
V A
TI
O
N
T (M
.S .L
. 1
2)
PERCENTAGE OF TIME EQUALLED OR EXCEEDED
SEPTEMBER
0 10 20 30 40 50 60 70 80 90 100
E
LE
V A
TI
O
N
T (M
.S .L
. 1
2)
PERCENTAGE OF TIME EQUALLED OR EXCEEDED
DECEMBER
0 10 20 30 40 50 60 70 80 90 100
E
LE
V A
TI
O
N
T (M
.S .L
. 1
2)
PERCENTAGE OF TIME EQUALLED OR EXCEEDED
JULY
0 10 20 30 40 50 60 70 80 90 100
E
LE
V A
TI
O
N
T (M
.S .L
. 1
2)
PERCENTAGE OF TIME EQUALLED OR EXCEEDED
OCTOBER
0 10 20 30 40 50 60 70 80 90 100
E
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V A
TI
O
N
T (M
.S .L
. 1
2)
PERCENTAGE OF TIME EQUALLED OR EXCEEDED
AUGUST
0 10 20 30 40 50 60 70 80 90 100
E
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V A
TI
O
N
T (M
.S .L
. 1
2)
PERCENTAGE OF TIME EQUALLED OR EXCEEDED
NOVEMBER
LR-B ----- LIGHT STANDARD
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