W912ES-18-B-0008_PLANS_FULL-SIZE_4.pdf

LOCK AND DAM 4

EMBANKMENT REPAIR

MISSISSIPPI RIVER

POOL ELEVATION DURATION CURVES

JANUARY JUNE

1972 2016

POOL STAGE DUR_1

LOCK AND DAM 4

HYDROLOGIC INFORMATION

Notes:

1. These monthly stage curves were derived using the U.S. Army Corps of Engineers Lock and Dam 4 24 hour stage data for the period 1972 through June 2016. MSL 1912 0.37 ft = NAVD 88 at Lock and Dam 4.

2. These stage duration curves are based on the best information available. These stage hydrographs represent the period 1972 2016, and do not necessarily represent all possible future conditions. Questions may be addressed to the office of the Corps of Engineers St. Paul, Minnesota.

MISSISSIPPI RIVER

POOL ELEVATION DURATION CURVES

JULY DECEMBER

1972 2016

POOL STAGE DUR_2

LOCK AND DAM 4

HYDROLOGIC INFORMATION

Notes:

1. These monthly duration curves were derived using the U.S. Army Corps of Engineers Lock and Dam 4 24 hour pool data for the period 1972 through 2016. MSL 1912 0.37 ft = NAVD 88 at Lock and Dam 4.

2. These elevation duration curves are based on the best information available. These elevation hydrographs represent the period 1972 2016, and do not necessarily represent all possible future conditions. Questions may be addressed to the office of the Corps of Engineers St. Paul, Minnesota.

MISSISSIPPI RIVER

TAIL ELEVATION DURATION CURVES

JANUARY JUNE

1972 2016

TAIL STAGE DUR_1

LOCK AND DAM 4

HYDROLOGIC INFORMATION

Notes:

1. These monthly stage curves were derived using the U.S. Army Corps of Engineers Lock and Dam 4 24 hour data for the period 1972 through 2016. MSL 1912 0.37 ft = NAVD 88 at Lock and Dam 4.

2. These stage duration curves are based on the best information available. These stage hydrographs represent the period 1972 2016, and do not necessarily represent all possible future conditions. Questions may be addressed to the office of the Corps of Engineers St. Paul, Minnesota.

MISSISSIPPI RIVER

TAIL ELEVATION DURATION CURVES

JULY DECEMBER

1972 2016

TAIL STAGE DUR_2

LOCK AND DAM 4

HYDROLOGIC INFORMATION

Notes:

1. These monthly duration curves were derived using the U.S. Army Corps of Engineers Lock and Dam 4 24 hour data for the period 1972 through 2016. MSL 1912 0.37 ft = NAVD 88 at Lock and Dam 4.

2. These elevation duration curves are based on the best information available. These elevation hydrographs represent the period 1972 2016, and do not necessarily represent all possible future conditions. Questions may be addressed to the office of the Corps of Engineers St. Paul, Minnesota.