W912ES26BA001_Plans.pdf

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Attached to
Corps Island Unloading
Solicitation number
W912ES26BA001
Issued by

About this file

This is a set of project design documents for a Corps Island Dredge Site Unloading project located in Diamond Bluff, Wisconsin, on Pool 3 of the Mississippi River, prepared by the U.S. Army Corps of Engineers St. Paul District. The project involves dredge material placement and site unloading, with a solicitation number W912ES26BA001 issued in December 2025. The documents include detailed technical drawings showing the project location, site plan, typical sections, and hydrologic information for the Mississippi River.

Key technical specifications include a work limit of 8.2 acres, maximum removal depths between 650' and 660' elevation, and 1V:3H side slope requirements for berms. The site is accessible only by river and is highly susceptible to flooding and river stage fluctuations. Hydrological data from 1972-2024 at Lock and Dam 3 provides elevation and flow information, with the highest recorded pool elevation at 687.86 feet occurring on April 19, 1965. The project design emphasizes protecting existing trees and maintaining specific elevation and slope requirements for dredge material placement.

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POOL 3

DIAMOND BLUFF, WI

MISSISSIPPI RIVER

CORPS ISLAND DREDGE SITE UNLOADING

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SOLICITATION NO.:

CONTRACT NO.:

ISSUE DATE:

APPROVED BY:

APPROVAL RECOMMENDED BY:

CHIEF DIVISIONENGR & CONST

EC-D

CHIEF

CHIEF BRANCH

BRANCH

CHIEF BRANCH

EC-H

EC-G

MENDATION OF ALL DRAWINGS IN THIS SET.

SIGNATURES INDICATE OFFICIAL RECOM-

MENT AS REQUIRED BY ER 1110-1-8152.

WITHIN THE SCOPE OF THEIR EMPLOY-

APPEAR ON THESE PROJECT DOCUMENTS

TRATION DESIGNATIONS OF INDIVIDUALS

THE INITIALS OR SIGNATURES AND REGIS-

PAUL DISTRICT CORPS OF ENGINEERS.

THIS PROJECT WAS DESIGNED BY THE ST.

TECHNICAL LEAD

W912ES26BA001

DECEMBER 2025

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PROJECT LOCATION MAP

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VERTICAL AND HORIZONTAL CONTROL POINTS

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NAME NORTHING EASTING ELEVATION DESCRIPTION

OBERN 924,663.80 2,974,116.61 689.23 NGS PID AC4934

2000'0 1000'

BLUFF GPS

DIAMOND

939,540.37 2,983,968.3 1017.5 NGS PID DN7019

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TRENTON

919,063.13 3,000,935.73 718.78 NGS PID DL4232

CEPDNAV07 931,353.02 2,982,164.46 683.28

LANDING

COVER AT DIAMOND BLUFF BOAT

ALUMINUM CAP WITH ALUMINUM

F 126 - - 746.37 NGS PID PP0444

FLYNN 931,111.78 2,967,653.69 - NGS PID DK3530

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AND NUMBER

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3 DIMENSIONAL

CONTROL POINT

2 DIMENSIONAL

CONTROL POINT##

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CONTROL POINT##

LOW CONTROL POOL (LCP) ELEVATION AT RIVER MILE 799 IS 673.7 FT NAVD88.8.

NAVD88.

LOW CONTROL POOL (LCP) ELEVATION AT RIVER MILE 797.06 IS 673.6 FT 7.

AERIAL IMAGERY DATED JUNE 2023.6.

ISLAND WERE DEVELOPED FROM SURVEY TAKEN IN NOVEMBER 2017.

TOPOGRAPHICAL CONTOURS AND SITE ELEVATIONS DEPICTED FOR CORPS 5.

SURVEY FT.

COORDINATES BASED ON NAD 83 (2011), MN SPCS, SOUTH ZONE - U.S. 4.

CONTRACTING OFFICER UPON CONTRACT AWARD.

VERTICAL CONTROL POINTS ARE AVAILABLE BY REQUEST TO THE

THE DIAGRAMS AND DETAILED DESCRIPTIONS OF HORIZONTAL AND 3.

DRAWINGS).

IMPACT CONTRACTOR WORK PROGRESS. SEE HYDROGRAPHS (REFERENCE

SUSCEPTIBLE TO FLOODING AND RIVER STAGE FLUCTUATIONS THAT MAY

THE UNLOADING SITE (CORPS ISLAND) IS WITHIN THE RIVER AND IS HIGHLY 2.

ACCESS TO THE UNLOADING SITE (CORPS ISLAND) IS BY RIVER ONLY.1.

GENERAL NOTES

EACH VIEW)

(CENTERED UNDER

VIEW SUBTITLE

GENERAL VIEW SYMBOLS

D1

SCALE:

DETAIL/SECTION

SUPPLEMENTAL INFORMATION

D1

SCALE:1" =XXX'

DETAIL/SECTION

SUPPLEMENTAL INFORMATION

TITLE

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0 1' 2'

TOP

FRONT SIDE

ELEVATION SECTION A-A

DrawingIdentifier

SheetName

DrawingIdentifier

SheetName

DrawingIdentifier

SheetName

SECTION CUT

DETAIL SYMBOL

### RIVER MILE

DESCRIPTIONDRAWING NO. PRODUCT I.D.

REFERENCE DRAWING INDEX

DAILY FLOW HYDROGRAPHS 2015-2024 JAN-DEC

FLOW DURATION CURVES 1972-2024 JAN-JUNE

FLOW DURATION CURVES 1972-2024 JULY-DEC

DESCRIPTION PRODUCT I.D.

DRAWING NO.

AS-BUILT

REF.

SHEET

CONSTRUCTION DRAWING INDEX

G-001

GENERAL DRAWINGS

COVER SHEET

PROJECT LOCATION AND VICINITY MAPSG-002

DRAWING INDEX, GENERAL NOTES, LEGEND, AND ABBREVIATIONSG-003

PLAN - CORPS ISLAND UNLOAD SITEC-101

CIVIL DRAWINGS

TYPICAL SECTIONS - CORPS ISLANDC-301

_CIDSU25_G-001XXX.DGN

_CIDSU25_G-002XXX.DGN

_CIDSU25_G-003XXX.DGN

_CIDSU25_C-101XXX.DGN

_CIDSU25_C-301XXX.DGN

0.999896930

COMBINED FACTOR (CF):

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NAD 83 (2011)

COORDINATE SYSTEM (HORIZONTAL CONTROL):

GEOID:

NAVD 88

ELEVATION DATUM (VERTICAL CONTROL):

GEOSPATIAL DATUM INFORMATION

ZONE BUFFER

EAGLE NEST W/ 660' EXCLUSION

EXISTING WING DAM

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WORK LIMITS

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MAXIMUM REMOVAL

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MAXIMUM REMOVAL

DEPTH = EL 660'

EL. 684'

E 2983624.43

N 927001.72

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EL. 675'

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EL. 675'

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N 926993.17

EL 675'

EL 675'

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GENERAL NOTES:

WITHIN THE WORK LIMIT IS 8.2 ACRES.

MATERIAL PILE (APPROXIMATELY EL 675). AREA

WORK LIMITS ARE TOE OF EXISTING DREDGE 4.

APPROXIMATE LOCATION AS SHOWN.

BE 1V:2H WITH A BOTTOM WIDTH OF 200'.

(EL 664). MAXIMUM SIDE SLOPES SHALL

AND STAGING SHALL BE 10' BELOW LCP

MAXIMUM DEPTH FOR DREDGE ACCESS 3.

PERIMETER.

TO PROTECT TREES ALONG ISLAND

OF EXISTING TREES, SLOPES MAY BE FLATTER

(APPROXIMATELY EL 675). AT THE LOCATION

EXISTING DREDGE MATERIAL PILE

1V:3H BERM SIDE SLOPES AT TOE OF

BERM SIDE SLOPES SHALL BE 1V:3H. BEGIN 2.

CONTRACTING OFFICER.

COORDINATE BERM LOCATION WITH

BE ADJUSTED TO PROTECT VEGETATION.

EDGE OF TREE LINE. BERM LOCATION MAY

EXISTING TREES, BEGIN BERM EDGE AT

BERM SHALL BE 10' (EL 684) ABOVE LCP. AT

BERM LOCATION IS APPROXIMATE. TOP OF 1.

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MAXIMUM REMOVAL DEPTH EL 650

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GRADE

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EL 675'

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2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

J M M J S N J M M J S N J M M J S N J M M J S N J M M J S N J M M J S N J M M J S N J M M J S N J M M J S N J M M J S N J

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CORPS ISLAND DREDGED MATERIAL PLACEMENT

SITE UNLOAD

MISSISSIPPI RIVER - LOCK AND DAM 3

POOL ELEVATION HYDROGRAPHS

JANUARY 01 - DECEMBER 31

2015 - 2024

SHEET NUMBER: 1 OF 3

LOCK AND DAM 3

HYDROLOGIC INFORMATION

2020 2021 2022 2023 2024

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

EL

EV

AT

IO

N I

N F

EE

T

(N

AV

D

8)

2015 2016 2017 2018 2019

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

EL

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N I

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T

(N

AV

D

8)

Notes:

1. The daily pool elevation hydrographs are based on data collected by the U.S. Army Corps of Engineers at Lock and Dam 3. There are 91 years of record 1935-2024. The highest recorded pool elevation occurred on April 19. 1965 (687.86 feet). MSL 1912 - 0.37 ft = NAVD 88 at Lock and Dam 3.

2. These hydrographs are based on the best information available. These 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.

CORPS ISLAND DREDGED MATERIAL

PLACEMENT SITE UNLOAD

MISSISSIPPI RIVER - LOCK AND DAM 3

POOL DURATION CURVES

JANUARY - JUNE

1972 - 2024

SHEET NUMBER: 2 OF 3

LOCK AND DAM 3

HYDROLOGIC INFORMATION

0 10 20 30 40 50 60 70 80 90 100

EL

EV

AT

IO

N I

N F

EE

T

(N

AV

D

8)

PERCENTAGE OF TIME EQUALLED OR EXCEEDED

MARCH

0 10 20 30 40 50 60 70 80 90 100

EL

EV

AT

IO

N I

N F

EE

T

(N

AV

D

8)

PERCENTAGE OF TIME EQUALLED OR EXCEEDED

JUNE

0 10 20 30 40 50 60 70 80 90 100

EL

EV

AT

IO

N I

N F

EE

T

(N

AV

D

8)

PERCENTAGE OF TIME EQUALLED OR EXCEEDED

JANUARY

0 10 20 30 40 50 60 70 80 90 100

EL

EV

AT

IO

N I

N F

EE

T

(N

AV

D

8)

PERCENTAGE OF TIME EQUALLED OR EXCEEDED

APRIL

0 10 20 30 40 50 60 70 80 90 100

EL

EV

AT

IO

N I

N F

EE

T

(N

AV

D

8)

PERCENTAGE OF TIME EQUALLED OR EXCEEDED

FEBRUARY

0 10 20 30 40 50 60 70 80 90 100

EL

EV

AT

IO

N I

N F

EE

T

(N

AV

D

8)

PERCENTAGE OF TIME EQUALLED OR EXCEEDED

MAY

Notes:

1. These monthly pool elevation duration curves were derived using data collected by the U.S. Army Corps of Engineers at Lock and Dam 3 for the period January 1972 through December 2024. MSL 1912 - 0.37 ft = NAVD 88 at Lock and Dam

3. Note pool elevation data exists prior to 1972 but was not used to compute duration curves due to a change in operation that occurred in 1971.

2. These duration curves are based on the best information available. These duration curves represent the period shown and do not necessarily represent all possible future conditions. Questions may be addressed to the office of the Corps of

CORPS ISLAND DREDGED MATERIAL

PLACEMENT SITE UNLOAD

MISSISSIPPI RIVER - LOCK AND DAM 3

POOL DURATION CURVES

1972 - 2024

SHEET NUMBER: 3 OF 3

LOCK AND DAM 3

HYDROLOGIC INFORMATION

0 10 20 30 40 50 60 70 80 90 100

EL

EV

AT

IO

N I

N F

EE

T

(N

AV

D

8)

PERCENTAGE OF TIME EQUALLED OR EXCEEDED

SEPTEMBER

0 10 20 30 40 50 60 70 80 90 100

EL

EV

AT

IO

N I

N F

EE

T

(N

AV

D

8)

PERCENTAGE OF TIME EQUALLED OR EXCEEDED

DECEMBER

0 10 20 30 40 50 60 70 80 90 100

EL

EV

AT

IO

N I

N F

EE

T

(N

AV

D

8)

PERCENTAGE OF TIME EQUALLED OR EXCEEDED

JULY

0 10 20 30 40 50 60 70 80 90 100

EL

EV

AT

IO

N I

N F

EE

T

(N

AV

D

8)

PERCENTAGE OF TIME EQUALLED OR EXCEEDED

OCTOBER

0 10 20 30 40 50 60 70 80 90 100

EL

EV

AT

IO

N I

N F

EE

T

(N

AV

D

8)

PERCENTAGE OF TIME EQUALLED OR EXCEEDED

AUGUST

0 10 20 30 40 50 60 70 80 90 100

EL

EV

AT

IO

N I

N F

EE

T

(N

AV

D

8)

PERCENTAGE OF TIME EQUALLED OR EXCEEDED

NOVEMBER

Notes:

1. These monthly pool elevation duration curves were derived using data collected by the U.S. Army Corps of Engineers at Lock and Dam 3 for the period January 1972 through December 2024. MSL 1912 - 0.37 ft = NAVD 88 at Lock and Dam

3. Note pool elevation data exists prior to 1972 but was not used to compute duration curves due to a change in operation that occurred in 1971.

2. These duration curves are based on the best information available. These duration curves represent the period shown and do not necessarily represent all possible future conditions. Questions may be addressed to the office of the Corps of

2025-12-17T14:36:20-0600
PERKINS.DUANE.A.1503498029
2025-12-17T13:11:53-0600
BEHLING.CHRISTOPHER.W.1230533535
2025-12-05T15:00:51-0600
Heather Henneman
2025-12-05T14:13:23-0600
MORKEN.PAUL.1388326413
2025-12-18T13:43:09-0600
Kari Hauck

File details come from the government source that posted it. Updated .