A22_W912ES-15-B-0011_Reference_Drawings_Full_Size.pdf

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Lock & Dam 7 Upper Guidewall Crib Grouting
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W912ES-15-B-0011
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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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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

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V A

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PERCENTAGE OF TIME EQUALLED OR EXCEEDED

MARCH

0 10 20 30 40 50 60 70 80 90 100

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V A

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PERCENTAGE OF TIME EQUALLED OR EXCEEDED

JUNE

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V A

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T (M

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PERCENTAGE OF TIME EQUALLED OR EXCEEDED

JANUARY

0 10 20 30 40 50 60 70 80 90 100

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PERCENTAGE OF TIME EQUALLED OR EXCEEDED

APRIL

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V A

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T (M

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PERCENTAGE OF TIME EQUALLED OR EXCEEDED

FEBRUARY

0 10 20 30 40 50 60 70 80 90 100

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V A

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T (M

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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

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V A

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PERCENTAGE OF TIME EQUALLED OR EXCEEDED

SEPTEMBER

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PERCENTAGE OF TIME EQUALLED OR EXCEEDED

DECEMBER

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PERCENTAGE OF TIME EQUALLED OR EXCEEDED

JULY

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PERCENTAGE OF TIME EQUALLED OR EXCEEDED

OCTOBER

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PERCENTAGE OF TIME EQUALLED OR EXCEEDED

AUGUST

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PERCENTAGE OF TIME EQUALLED OR EXCEEDED

NOVEMBER

LR-B ----- LIGHT STANDARD

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