PLANS Amendment 2.pdf

PDF 16 MB Posted Jun 25, 2020

Attached to: St. Louis River AOC Azcon Slip Sediment Remediation
Solicitation number: W911XK20B0014
Issued by: Department of the Army Corps of Engineers Engineering District Detroit

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Written by GovTribe AI · Dec 28, 2023

This solicitation seeks proposals to construct a remedial cap in the Azcon/Duluth Seaway Port Authority slip in Duluth-Superior harbor. Key requirements include mobilizing to the site, installing a silt curtain, dredging the slip with a mechanical plant and treating sediment in scows with cement, transporting treated sediment to Erie Pier for offloading and disposal at a local landfill, and placing two layers of cap material consisting of dredged material and armor stone. Ongoing surveys will be conducted by the Army Corps of Engineers Detroit District during construction to ensure design requirements are met. The solicitation was issued by the Department of the Army Corps of Engineers Engineering District Detroit.

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Other files

File	Type	Posted
AZCON ABSTRACT.pdf	PDF	Jul 15, 2020
AZCON - Questions and Answerss W911XK20B0014.pdf	PDF	Jun 30, 2020
Pre-Bid Walk Sign-In Sheet.pdf	PDF	Jun 25, 2020
SPECIFICATION Amendment 2.pdf	PDF	Jun 25, 2020
AMENDMENT W911XK20B0014 0002.pdf	PDF	Jun 25, 2020
AZCON AMENDMENT 0001.pdf	PDF	Jun 12, 2020
AZCON SOLICITATION W911XK20B0014.pdf	PDF	Jun 10, 2020
AZCON Certified Final Plans .pdf	PDF	Jun 10, 2020
AZCON Certified Final Specification.pdf	PDF	Jun 10, 2020

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REMEDIATION SITE

AZCON SEDIMENT

REQ'D LAYER A SOURCE MATERIAL

CDF

ERIE PIER

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...\Active Projects\I-RAP-Duluth, MN (402563)-AZCON Corp. Sediment Remediation\3 - CADD\CAD_BIM\_Sheets\

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CONTRACT NO.:

ISSUE DATE:

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A N A of Engineers

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WILLIAM D. MERTE P.E., CHIEF COST & GENERAL ENGINEERING BRANCH

PHILLIP C. ROSS P.E., CHIEF ENGINEERING & CONSTRUCTION OFFICE

MARIE STRUM P.E., CHIEF ENGINEERING & TECHNICAL SERVICES

REQUIRED BY ER 1110-1-8152

PROJECTS DOCUMENTS WITHIN THE SCOPE OF THEIR EMPLOYMENT AS

REGISTRATION DESIGNATIONS OF INDIVIDUALS APPEAR ON THESE

ARMY CORPS OF ENGINEERS. THE INITIALS OR SIGNATURES AND

THE PROJECT WAS DESIGNED BY THE DETROIT DISTRICT OF THE U.S.

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Illinois

Indiana Ohio

Michigan

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Lake Superior

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TIMOTHY SMITH, P.E., CHIEF GEOTECHNICAL & STRUCTURES BRANCH

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ST. LOUIS RIVER AOC - REMEDIAL ACTION PLAN

AZCON/DSPA SLIP - SEDIMENT REMEDIATION

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MNDOT SPECIFICATIONMINIMUM D50 REQUIRED REQUIRED AREA

AND TRANSITION ZONE

AREA A, B, C, D, E, 2-INCH

MEETING PARAGRAPH A.1 QUALITY

SECTION 3601, RIP RAP MATERIAL,

2-INCH STONE)

AREA C (COVER D50 4-INCH

MEETING PARAGRAPH A.1 QUALITY

SECTION 3601, RIP RAP MATERIAL,

GENERAL NOTES

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AERIAL IMAGE SOURCE: USDA FSA NAIP 2015 (DATED 22 SEPT 2015)18.

OUTSIDE OF THE SLIP AS DESCRIBED IN SPEC SECTION 35 20 23.

SEDIMENTS SHALL BE DECONTAMINATED AT THE COMPLETION OF THE DREDGING AND PRIOR TO USE AT ANY LOCATIONS

ALL EQUIPMENT USED FOR DREDGING THE EXISTING SEDIMENT IN THE SLIP THAT DIRECTLY CONTACTS THOSE 17.

THE UNDERLYING CONTAMINATED SEDIMENT WITH THE REQUIRED CAP MATERIAL, AND PREVENT CREATING MUDWAVES.

THE CONTRACTOR SHALL UTILIZE BEST MANAGEMENT PRACTICES THAT MINIMIZE THE DISPLACEMENT AND/OR MIXING OF 16.

CONSTRUCTION WORK.

CONTRACTOR IS PROHIBITED FROM USE OF TEMPORARY ANCHORS OR SPUDS WITHIN CAPPING AREAS DURING CAP 15.

WORK SITE.

TO TAKE DUE PRECAUTIONARY MEASURES TO PROTECT ANY EXISTING UTILITIES OR STRUCTURES LOCATED AT THE

SHALL NOTIFY THE UTILITY COMPANIES FOR ONSITE LOCATIONS OF EXISTING UTILITIES. THE CONTRACTOR IS REQUIRED

RESPONSIBILITY FOR THEIR ACCURACY. PRIOR TO THE START OF ANY CONSTRUCTION ACTIVITY, THE CONTRACTOR

INFORMATION AVAILABLE AND ARE GIVEN FOR THE CONVENIENCE OF THE CONTRACTOR. THE ENGINEER ASSUMES NO

THE LOCATIONS OF ALL EXISTING UTILITIES SHOWN ON THIS PLAN HAVE BEEN DETERMINED FROM THE BEST 14.

SOLICITATION DOCUMENTS.

THE CONTRACTOR SHALL VERIFY THE LOCATION OF AUTHORIZED CROSSING IN ACCORDANCE WITH THE CONTRACT 13.

EQUIPMENT GUIDELINES PRESENTED IN THE SITE SAFETY PLAN PREPARED BY CONTRACTOR.

TARGET LEVELS, SEE SPEC SECTION 35 20 23 ATTACHMENT B. CONTRACTOR SHALL FOLLOW THE PERSONAL PROTECTIVE

EXISTING SEDIMENTS IN THE SLIP HAVE CONCENTRATIONS OF SELECT CONTAMINANTS ABOVE SEDIMENT QUALITY 12.

CAUSED BY THE CONTRACTOR DURING CONSTRUCTION SHALL BE REPAIRED AT THE EXPENSE OF THE CONTRACTOR.

ANY DAMAGE TO PRIVATE OR PUBLIC PROPERTY AND TO EXISTING STRUCTURES NOT SPECIFIED TO BE ALTRED AND 11.

THE CONTRACTOR SHALL CONFORM TO ALL REQUIREMENTS OF THE CLEAN WATER ACT, SECTION 401 CERTIFICATION.10.

ARMOR STONE LAYER:

SILTY SAND DREDGE, SOURCED FROM FEDERAL NAVIGATION CHANNEL AS SHOWN ON SHEET CN105.

LAYER A:

24:

LAYERS FOR THE CAP AREAS SHALL CONSIST OF THE FOLLOWING MATERIALS IN ACCORDANCE WITH SPECIFICATION 35 20

CN501, DETAILS A1, C1, E1, AND SHEET CN301. SATISFACTORY MATERIALS FOR REQUIRED LAYER A AND ARMOR STONE

SUBAQUEOUS CAP CONSTRUCTION WILL CONSIST OF LAYER A AND THE ARMOR STONE LAYERS AS SHOWN ON SHEET 9.

SECTION 35 20 24.

CONTRACTOR SHALL PERFORM CONFIRMATION SEDIMENT CORES DURING THE PILOT TEST AS DESCRIBED IN SPEC

CAP AREA TO CONFIRM PLACEMENT METHODS. PILOT TESTS ARE DESCRIBED IN SPECIFICATION SECTION 35 20 24.

AFTER COMPLETION OF SLIP DREDGING, THE CONTRACTOR SHALL PERFORM A PILOT TEST AT ONE LOCATION WITHIN THE 8.

LOADED ONTO TRUCKS FOR TRANSPORT TO THE DISPOSAL FACILITY AS DESCRIBED IN SPEC SECTION 35 20 25.

TRANSPORTED BY BARGE TO THE DOCKING FACILITY AT ERIE PIER CDF AS SHOWN ON SHEET R102, WHERE IT WILL BE

SPEC SECTION 35 20 25. AFTER SEDIMENT DEWATERING IS COMPLETED, THE DEWATERED SEDIMENT SHALL BE

ALL DREDGED SEDIMENT FROM THE SLIP WILL BE DEWATERED ON BARGES WITHIN THE REMEDIAL AREA AS DESCRIBED IN 7.

WATER AS DESCRIBED IN SPECIFICATION 35 20 25.

IN THE REQUIRED DREDGE AREAS SHALL BE PLACED IN BARGES WITH CONTAINMENT PADS TO COLLECT DRAINAGE

AFTER COMPLETION OF BASELINE BATHYMETRIC SURVEY BY USACE, DREDGING IN THE SLIP WILL START. ALL MATERIAL 6.

FEDERAL NAVIGATION CHANNEL MEETS THE REQUIREMENTS SPECIFIED WITHIN THE CONTRACT DOCUMENTS.

EXISTING CONDITIONS WITHIN THE SITE TO VERIFY DREDGE DEPTH AND WILL ENSURE THAT THE DREDGING WITHIN THE

FEDERAL NAVIGATION CHANNEL, RESPECTIVELY. THESE SURVEYS WILL BE UTILIZED TO ESTABLISH A BASELINE FOR

A SIXTH AND SEVENTH BATHYMETRIC SURVEY WILL BE CONDUCTED PRIOR TO AND AFTER DREDGING WITHIN THE

SITE.

WITHIN THE CONTRACT DOCUMENTS AND SHALL BE UTILIZED TO DEVELOP THE RECORD AS-BUILT DRAWINGS OF THE

ARMOR LAYER IN AREA C, TO ENSURE THAT THE ARMOR LAYER CONSTRUCTION MEETS THE REQUIREMENTS SPECIFIED

C. THIS SURVEY WILL BE UTILIZED TO COMPUTE THE VOLUME OF MATERIAL NEEDED TO CONSTRUCT THE D50 4-INCH

4-INCH ARMOR LAYER IN AREA

THE FIFTH BATHYMETRIC SURVEY WILL BE CONDUCTED AFTER CONSTRUCTION OF THE D

LAYER IN AREA C.

4-INCH ARMOR STONE

2-INCH ARMOR STONE LAYER, AND TO ESTABLISH A BASELINE FOR THE D

CONSTRUCT THE D

REQUIREMENTS SPECIFIED WITHIN THE CONTRACT DOCUMENTS, TO COMPUTE THE VOLUME OF MATERIAL NEEDED TO

2-INCH ARMOR STONE LAYER CONSTRUCTION MEETS THE

SURVEY WILL BE UTILIZED TO ENSURE THAT THE D

2-INCH ARMOR STONE LAYER. THIS

THE FOURTH SURVEY WILL BE CONDUCTED AFTER CONSTRUCTION OF THE D

BASELINE FOR THE ARMOR STONE LAYERS.

CONSTRUCTION MEETS THE REQUIREMENTS SPECIFIED WITHIN THE CONTRACT DOCUMENTS AND TO ESTABLISH A

CONSTRUCTION OF THE ARMOR STONE LAYERS. THIS SURVEY WILL BE UTILIZED TO ENSURE THAT LAYER A

A THIRD SURVEY WILL BE CONDUCTED AFTER CONSTRUCTION OF LAYER A OF THE SUBAQUEOUS CAP, AND PRIOR TO

DOCUMENTS, AND TO ESTABLISH A BASELINE FOR LAYER A OF THE SUBAQUEOUS CAP.

MATERIAL DREDGED, WILL ENSURE THAT SLIP DREDGING SATISFIES THE REQUIREMENTS SPECIFIED IN THE CONTRACT

CONSTRUCTION OF LAYER A OF THE SUBAQUEOUS CAP. THIS SURVEY WILL BE UTILIZED TO COMPUTE THE VOLUME OF

THE SECOND BATHYMETRIC SURVEY WILL BE COMPLETED AFTER COMPLETION OF THE SLIP DREDGING AND PRIOR TO

DREDGE DEPTH NEEDS TO BE REVISED.

COLLECTING AND ANALYZING THE SURVEY DATA IN ORDER TO MAKE A DETERMINATION ON WHETHER OR NOT THE REQ'D

SURVEY VARIES SIGNIFICANTLY FROM WHAT IS PROVIDED HEREIN, THE GOVERNMENT SHALL BE RESPONSIBLE FOR

WILL BE COLLECTED TO ESTABLISH A BASELINE FOR EXISTING CONDITIONS WITHIN THE SITE. IN THE EVENT THAT THIS

THE FIRST BATHYMETRIC SURVEY WILL BE COLLECTED PRIOR TO START OF DREDGING WITHIN THE SLIP. THIS SURVEY

SPEC SECTION 35 20 23.

SURVEYS, INCLUDING, BUT NOT LIMITED TO, EQUIPMENT THAT WILL BE USED TO COLLECT THE SURVEYS, IS DESCRIBED IN

HOURS TO COLLECT AND PROCESS THE SURVEY DATA. ADDITIONAL INFORMATION WITH REGARDS TO THE BATHYMETRIC

FOR A GOVERNMENT SURVEY. THE CONTRACTOR SHALL ASSUME THAT THE GOVERNMENT WILL NEED A TOTAL OF 72

SHALL NOTIFY THE CONTRACTING OFFICER'S REPRESENTATIVE A MINIMUM OF 4 CALENDAR DAYS PRIOR TO THE NEED

THAT CONDITIONS AND CONSTRUCTION ARE COMMENCING AS INTENDED AND DESCRIBED, HEREIN. THE CONTRACTOR

SEVERAL BATHYMETRIC SURVEYS WILL BE COLLECTED BY THE GOVERNMENT AS PART OF THIS CONTRACT TO ENSURE 5.

AND E, AND THE TRANSITION ZONE, AS SHOWN ON SHEETS CN103, CN104, CN301, CN302 AND CN501.

AS SHOWN ON SHEETS CN102 AND CN301. REQUIRED SUBAQUEOUS CAP SHALL BE CONSTRUCTED IN AREAS A, B, C, D, REQUIRED SLIP DREDGING SHALL BE PERFORMED BY THE CONTRACTOR IN AREA A, AREA D, AND THE TRANSITION ZONE, CONTRACTOR WILL BE RESPONSIBLE FOR COLLECTION OF CHECK SURVEYS AS THE WORK COMMENCES.

BATHYMETRIC SURVEYS (BY GOVERNMENT) TO ENSURE TARGET ELEVATIONS AND THICKNESSES ARE ACHIEVED. THE

CONSTRUCTION OF AN ENGINEERED SUBAQUEOUS CAP AND ARMOR LAYERS, AND COLLECTION OF MULTIPLE

BOTH WITHIN THE SLIP AND THE DULUTH-SUPERIOR HARBOR, DEWATERING AND DISPOSAL OF DREDGE SEDIMENT, MANAGEMENT PRACTICES (BMP) TO MINIMIZE TURBIDITY IMPACTS DURING CONSTRUCTION, DREDGING OF MATERIAL

THE REQUIRED WORK UNDER THIS CONTRACT INCLUDES, BUT IS NOT LIMITED TO, INSTALLATION OF VARIOUS BEST 4.

LAMBERT PROJECTION, NORTH ZONE (2201), NORTH AMERICAN DATUM 1983 (NAD83), US SURVEY FOOT.

THE GRID COORDINATE SYSTEM SHOWN IS REFERENCED TO THE MINNESOTA STATE PLANE COORDINATE SYSTEM, 3.

NOAA #9099064 AT THE DULUTH VESSEL YARD - SET AND MAINTAINED 6 MINUTE INTERVAL READINGS.

ALL SOUNDINGS ARE IN FEET AND ARE REFERENCED TO LOW WATER DATUM (+0.0 LWD = 601.1 IGLD85). GAGE STATION IS 2.

MULTI BEAM DATA COLLECTED BY USACE ON AUGUST 2019

FEDERAL NAVIGATION CHANNEL CONDITION SURVEY:

MULTI BEAM DATA COLLECTED BY USACE ON JUNE 2018

AZCON/DSPA SLIP CONDITION SURVEY:

INDICATED AND CAN ONLY BE CONSIDERED AS INDICATING THE GENERAL CONDITIONS PRESENT AT THAT TIME.

THE INFORMATION DEPICTED ON THESE PLANS REPRESENTS THE RESULTS OF SEVERAL SURVEYS MADE ON THE DATES 1.

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FORMER DOCK WALL

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AZCON SLIP EXISTING CONDITIONS PLAN - EASTERLY END

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AERIAL IMAGE SOURCE: USDA FSA NAIP 2015 (DATED 22 SEPT 2015)1.

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S P

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CERTIFIED FINAL - READY TO ADVERTISE

U N

CN102

CN103

CN101

-30

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-27

-29

-30

-28

-25

-26

-24

-22

-25

-22

-30

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-18

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-2

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-15

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-19

-2

-20

-22

BW18AZC-025

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WALL TO BE UNDISTURBED

EXISTING FAILED TIMBER DOCK

TURBIDITY CURTAIN

REQUIRED TEMPORARY

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US Army Corps

U .S

A R

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T R

DULUTH SEAWAY PORT AUTHORITY

AZCON LLC

-20 EXISTING MAJOR CONTOUR

EXISTING MINOR CONTOUR-28

R E

Q U

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R E

D G

G P

L A

BW14AZC-004

LEGEND

PORT AUTHORITYDULUTH SEAWAY

AZCON SLIP REQUIRED DREDGING PLAN - EASTERLY END

SCALE: 1" = 30'

30' 60'0E1

AZCON SLIP REQUIRED DREDGING PLAN - WESTERLY END

SCALE: 1" = 30'

GENERAL SHEET NOTES

TRANSITION ZONE

30' 60'0

S T L

O U

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O C R

E M

E D

L A

C T

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N /D

S P

A S

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E D

(TO BE UNDISTURBED)

EXISTING SHORE LINE EROSION REHABILITATION AREA

FEET WIDE

1V:4H APPROXIMATELY 13

DREDGING TRANSITION ZONE

AREA - 2,000 S.F.

FORMER DOCKWALL

6 FEET WIDE

1V:4H APPROXIMATELY

DREDGING TRANSITION ZONE

AREA = 5,500 S.F.

BELOW EXISTING SEDIMENT SURFACE AREA

REQUIRED DREDGE AREA A TO 30 INCHES

AREA = 625 S.F.

BELOW EXISTING SEDIMENT SURFACE AREA

REQUIRED DREDGE AREA D TO 5 FEET

AREA A

AREA

E. 2873903.75

N. 424791.37

E. 2873946.20

N. 424722.34

REMNANT

DOCKWALL

EXISTING

R O

S S

CONSTRUCTION SHALL BE REPAIRED AT THE EXPENSE OF THE CONTRACTOR.

NOT SPECIFIED TO BE ALTERED AND CAUSED BY THE CONTRACTOR DURING

ANY DAMAGE TO PRIVATE OR PUBLIC PROPERTY AND TO EXISTING STRUCTURES 7.

COORDINATE WITH COR FOR DIRECTION.

LEVELING GRADE AND CANNOT BE REMOVED, CONTRACTOR SHALL

SUBAQUEOUS CAP OR FILL AREAS EXTEND MORE THAN 2 FEET ABOVE FINAL

DEBRIS IS ANTICIPATED IN DREDGE AREAS. IF DEBRIS OBJECTS WITHIN 6.

TURBIDITY CURTAIN.

BARGES WITHIN THE REMEDIAL AREA PROTECTED BY THE TEMPORARY

SPECIFICATION 35 20 25. ALL DREDGED SEDIMENT WILL BE DEWATERED ON

WITH CONTAINMENT PADS TO COLLECT DRAINAGE WATER AS DESCRIBED IN

ALL MATERIAL IN THE REQUIRED DREDGE AREAS SHALL BE PLACED IN BARGES 5.

ZONE SLOPE AND CONTINUE AT A 1V:4H SLOPE AS SHOWN ON SHEET CN301.

REQUIRED DREDGE IN TRANSITION AREAS WILL START AT TOP OF TRANSITION

CONTINUE EASTWARD TO PREVENT SLOUGHING OF THE SEDIMENT SLOPE.

REQUIRED DREDGE SHALL START AT FORMER DOCKWALL LOCATION AND 4.

THE 2018 SURVEY.

ALL QUANTITIES PROVIDED HEREIN ARE BASED ON CONDITIONS AT THE TIME OF 3.

CURTAIN FOR APPROVAL BY THE COR PRIOR TO THE START OF DREDGING.

OTHERS. CONTRACTOR SHALL SUBMIT PROPOSED LOCATION OF THE TURBIDITY

DREDGE AND CAP AREA AND PROVIDE USE OF REMAINING SLIP AREAS BY

TEMPORARY TURBIDITY CURTAIN SHALL BE LOCATED TO LIMIT TURBIDITY TO

USDOT TYPE II SHALL BE INSTALLED PRIOR TO CONSTRUCTION IN THE SLIP.

TEMPORARY TURBIDITY CURTAIN MEETING THE REQUIREMENTS OF AT LEAST A

PRIOR TO WORK TAKING PLACE WITHIN THE SLIP.

THE CONTRACTOR SHALL INSTALL ALL BEST MANAGEMENT PRACTICES (BMP) 2.

STEVE SCHOFF, MPCA PROJECT MANAGER, (651) 757-2701.

LANDOWNERS AS NEEDED PRIOR TO START OF CONSTRUCTION. CONTACT

CONTRACTOR WILL COORDINATE REMOVAL OF VESSELS IN SLIP WITH 1.

C-101

CERTIFIED FINAL - READY TO ADVERTISE

U N

CN301

CN302

-30

-28

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BW14AZC-021

BW14AZC-019

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-5

-10

-15

-20

-18

-10

-15

-19

-20 -2

-2

-20

-22

-15

-10

-19

-2

-20

-22

BW18AZC-025

BW18AZC-024

BW18AZC-026

BW14AZC-022

-25

WALL

FORMER DOCK

WALL

TIMBER DOCK

EXISTING FAILED

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US Army Corps

U .S

A R

M Y C

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P S

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G I

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DULUTH SEAWAY PORT AUTHORITY

CN102

T R

TAREA A

AREA C

AREA B

AREA E

BW14AZC-004

(APRROX. 2500 S.F.)

REQUIRED CAP PILOT TEST AREA

SCALE: 1" = 30'

W E

S T E

LEGEND GENERAL SHEET NOTES

O C

A P A

R E

CAP APRON

30' 60'0

S T L

O U

E R A

O C R

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E D

SEE DETAIL A1 ON SHEET CN501

AREA = 56,500 S.F.

TOP: 8" OF 4" STONE

MIDDLE: 4" OF 2" STONE

BOTTOM: 12" OF LAYER A MATERIAL

REQUIRED SUBAQUEOUS CAP

AREA C

SEE DETAIL C7 ON SHEET CN301

AREA = 2,000 S.F.

TOP: 6" THICK OF 2" STONE

BOTTOM: LAYER A MATERIAL TO -22 LWD.

REQUIRED FILL AND CAP

AREA E

EXISTING SHORE LINE EROSION REHABILITATION AREA - TO BE PROTECTED

AREA D

AZCON SLIP REQUIRED SUBAQUEOUS CAP PLAN - WESTERLY END

CAP APRON

E. 2873903.75

N. 424791.37

E. 2873946.20

N. 424722.34

E. 2873925.92

N. 424712.38

E. 2873959.92

N. 424631.76

SEE DETAIL E1 ON SHEET CN501

SEE SECTION F1 ON SHEET CN301

AREA = 5,500 S.F.

TOP: 6" OF 2" STONE

BOTTOM: 18" THICK LAYER A MATERIAL

REQUIRED SUBAQUEOUS CAP

AREA A

SEE DETAIL C1 ON SHEET CN501

SEE SECTION D1 ON SHEET CN301

AREA = 17,100 S.F.

TOP: 6" OF 2" STONE

BOTTOM: 6" OF LAYER A MATERIAL

REQUIRED SUBAQUEOUS CAP

AREA B

SEE SECTION A1 ON SHEET CN302

AREA = 625 S.F.

TOP: 6-INCH THICK 2-INCH STONE

BOTTOM: 18" THICK LAYER A MATERIAL

REQUIRED SUBAQUEOUS CAP

AREA D

R O

S S

DOCKWALL

PROTECT EXISTING

(50' x 50')

PILOT TEST AREA

SUBAQUEOUS CAP

FOLLOWS THE -22 LWD. CONTOUR.

AREA E APPROXIMATELY

R E

Q U

E D S

U B

A Q

U E

O U

S C

A P F

L P

L A

CERTIFIED FINAL - READY TO ADVERTISE

U N

AREA = 6,800 S.F.

AND OPTIONAL WORK SECTION F1 CN302

SEE SECTION A1 ON CN301

LAYER A & ARMOR STONE

REQUIRED SUBAQUEOUS CAP - APRON AREA

SPUDS WITHIN CAPPING AREAS DURING CAP CONSTRUCTION WORK.

CONTRACTOR IS PROHIBITED FROM USE OF TEMPORARY ANCHORS OR 8.

AND PREVENTS MUDWAVES.

CONTAMINATED SEDIMENT WITH THE REQUIRED CAP AND FILL MATERIAL,

MINIMIZE THE DISPLACEMENT AND/OR MIXING OF THE UNDERLYING

THE CONTRACTOR SHALL UTILIZE BEST MANAGEMENT PRACTICES THAT 7.

FILL MATERIAL UPON PLACEMENT.

THE CONTRACTOR SHOULD ANTICIPATE SETTLEMENT OF THE CAP AND 6.

IN SPECIFICATION 35 20 24.

AREAS PRIOR TO CONSTRUCTION OF THE ARMOR LAYERS, AS IDENTIFIED

E1. THE CONTRACTOR SHALL CONSTRUCT THE LAYER A CAP IN ALL

AND VARIOUS ARMOR AS SHOWN ON SHEET CN501 DETAILS A1, C1, AND

SPECIFICATION 35 20 24. THE CAP SHALL INCLUDE LAYER A MATERIAL

SHOWN ON SHEETS CN103, CN104, AND CN301, AND AS IDENTIFIED IN

AREAS A THROUGH E, AND THE CAP APRON TRANSITION ZONE AREAS AS

RESULTS, THE CONTRACTOR SHALL CONSTRUCT A SUBAQUEOUS CAP IN

UPON APPROVAL BY THE APPROVING AUTHORITY OF THE PILOT TEST 5.

IDENTIFIED IN SPECIFICATION 35 20 24 IN THE AREA SHOWN IN CN103.

THE CONTRACTOR SHALL PERFORM A SUBAQUEOUS CAP PILOT TEST AS 4.

TIME OF THE 2018 SURVEY.

ALL QUANTITIES PROVIDED HEREIN ARE BASED ON CONDITIONS AT THE 3.

PRIOR TO THE START OF CAP CONSTRUCTION.

LOCATION OF THE TURBIDITY CURTAIN FOR APPROVAL BY THE COR

SLIP AREAS BY OTHERS. CONTRACTOR SHALL SUBMIT PROPOSED

TURBIDITY TO DREDGE AND CAP AREA AND PROVIDE USE OF REMAINING

THE SLIP. TEMPORARY TURBIDITY CURTAIN SHALL BE LOCATED TO LIMIT

LEAST A USDOT TYPE II SHALL BE INSTALLED PRIOR TO CONSTRUCTION IN

TEMPORARY TURBIDITY CURTAIN MEETING THE REQUIREMENTS OF AT

(BMP) PRIOR TO WORK TAKING PLACE WITHIN THE SLIP.

THE CONTRACTOR SHALL INSTALL ALL BEST MANAGEMENT PRACTICES 2.

VESSEL REMOVAL.

CONTRACTOR SHALL CONTINUALLY UPDATE USACE ON THE STATUS OF

CONTACT STEVE SCHOFF, MPCA PROJECT MANAGER, (651) 757-2701.

LANDOWNERS AS NEEDED PRIOR TO START OF CONSTRUCTION.

CONTRACTOR WILL COORDINATE REMOVAL OF VESSELS IN SLIP WITH 1.

CN301

CN302

-28

-26

-28

-27

-26

-29

-30

-29

-27

-25

-22

-20

-25

-20

-25

-20

-30

-26

-22

-23

-27

S T

BW14AZC-003

BW14AZC-004

BW14AZC-005

BW14AZC-006

BW14AZC-023

BW14AZC-007

BW14AZC-008

BW14AZC-009

BW18AZC-027

TURBIDITY CURTAIN

REQUIRED TEMPORARY

S O

A T

N N

D E

N E

D B

D E

S C

M A

R K

S U

B M

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D B

D A

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D R

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2 3 4 5 6 7 8 9 10

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®of Engineers

US Army Corps

U .S

A R

M Y C

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P S O

F E

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E E

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A AF

P S

C O

G I

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DULUTH SEAWAY PORT AUTHORITY

BW14AZC-004

CN103

T R

M A

T C

H L

E S

E E S

H E

E T C

SCALE: 1" = 30'

30' 60'0

LEGEND

S T E

N D

N O C

A P A

R E

-20 EXISTING MAJOR CONTOUR

EXISTING MINOR CONTOUR-28

S T L

O U

E R A

O C R

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L A

C T

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L A

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AZCON SLIP REQUIRED SUBAQUEOUS CAP PLAN - EASTERLY END

R O

S S

R E

Q U

E D S

U B

A Q

U E

O U

S C

A P F

L P

L A

CERTIFIED FINAL - READY TO ADVERTISE

U N

AREA = 6,800 S.F.

SEE SECTIONS C1 & E1 ON CN501

CAP APRON AREA LAYER A & ARMOR

OPTIONAL AREA F REQUIRED SUBAQUEOUS

SPUDS WITHIN CAPPING AREAS DURING CAP CONSTRUCTION WORK.

CONTRACTOR IS PROHIBITED FROM USE OF TEMPORARY ANCHORS OR 8.

AND PREVENTS MUDWAVES.

CONTAMINATED SEDIMENT WITH THE REQUIRED CAP AND FILL MATERIAL,

MINIMIZE THE DISPLACEMENT AND/OR MIXING OF THE UNDERLYING

THE CONTRACTOR SHALL UTILIZE BEST MANAGEMENT PRACTICES THAT 7.

FILL MATERIAL UPON PLACEMENT.

THE CONTRACTOR SHOULD ANTICIPATE SETTLEMENT OF THE CAP AND 6.

IN SPECIFICATION 35 20 24.

AREAS PRIOR TO CONSTRUCTION OF THE ARMOR LAYERS, AS IDENTIFIED

E1. THE CONTRACTOR SHALL CONSTRUCT THE LAYER A CAP IN ALL

AND VARIOUS ARMOR AS SHOWN ON SHEET CN501 DETAILS A1, C1, AND

SPECIFICATION 35 20 24. THE CAP SHALL INCLUDE LAYER A MATERIAL

SHOWN ON SHEETS CN103, CN104, AND CN301, AND AS IDENTIFIED IN

AREAS A THROUGH E, AND THE CAP APRON TRANSITION ZONE AREAS AS

RESULTS, THE CONTRACTOR SHALL CONSTRUCT A SUBAQUEOUS CAP IN

UPON APPROVAL BY THE APPROVING AUTHORITY OF THE PILOT TEST 5.

IDENTIFIED IN SPECIFICATION 35 20 24 IN THE AREA SHOWN IN CN103.

THE CONTRACTOR SHALL PERFORM A SUBAQUEOUS CAP PILOT TEST AS 4.

TIME OF THE 2018 SURVEY.

ALL QUANTITIES PROVIDED HEREIN ARE BASED ON CONDITIONS AT THE 3.

PRIOR TO THE START OF CAP CONSTRUCTION.

LOCATION OF THE TURBIDITY CURTAIN FOR APPROVAL BY THE COR

SLIP AREAS BY OTHERS. CONTRACTOR SHALL SUBMIT PROPOSED

TURBIDITY TO DREDGE AND CAP AREA AND PROVIDE USE OF REMAINING

THE SLIP. TEMPORARY TURBIDITY CURTAIN SHALL BE LOCATED TO LIMIT

LEAST A USDOT TYPE II SHALL BE INSTALLED PRIOR TO CONSTRUCTION IN

TEMPORARY TURBIDITY CURTAIN MEETING THE REQUIREMENTS OF AT

(BMP) PRIOR TO WORK TAKING PLACE WITHIN THE SLIP.

THE CONTRACTOR SHALL INSTALL ALL BEST MANAGEMENT PRACTICES 2.

VESSEL REMOVAL.

CONTRACTOR SHALL CONTINUALLY UPDATE USACE ON THE STATUS OF

CONTACT STEVE SCHOFF, MPCA PROJECT MANAGER, (651) 757-2701.

LANDOWNERS AS NEEDED PRIOR TO START OF CONSTRUCTION.

CONTRACTOR WILL COORDINATE REMOVAL OF VESSELS IN SLIP WITH 1.

GENERAL SHEET NOTES

A T

N N

D E

N E

D B

D E

S C

M A

R K

S U

B M

T E

D B

D A

T E

C O

N T

R A

C T N

C H

E C

K E

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D R

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U E D

A T

2 3 4 5 6 7 8 9 10

SHEET ID

®of Engineers

US Army Corps

U .S

A R

M Y C

O R

P S O

F E

N G

E E

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A AF

P S

C O

G I

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D E

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I n c r e a o f i t

S u b m

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V a l g i n e e r i

E R

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K O

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T S

C H

A N

N E

C H

A N

N E

S U

R V

E Y

E D O

C T

O B

E R

, 2

O P

A N

S I

S T L

O U

N T

D E

T R

M I

A N A

V E

D U

L U

T H -S

U P

E R

R H

A R

B O

M N -W

O U

E R A

O C R

E M

E D

L A

C T

N P

L A

SCALE: 1" = 7000'

SHEET KEY MAP

REQUIRED LAYER A SOURCE MATERIAL AREA

SCALE: 1" = 100'

LEGEND

REQ'D LAYER A SOURCE MATERIAL AREA

DS-15-113

FEDERAL CHANNEL

SOURCE MATERIAL AREA COORDINATES

NORTH EAST

DS-15-113

EXISTING BORING LOCATION

100' 200'0

-2

-3

-30

-3

-4

-3

-45

-4

-3

-35

DS-15-111

-2

-27

-2

-27

-2

-26

-2

-26

-27

-2

-27

-2

-28

-2

-25

424389.6500 2877729.7620BORING DS-15-113

424898.9410 2877622.8380BORING DS-15-111

-2

-30

-2

-27

-28

-2

CN105

(RED ABOVE -28LWD)

(BLUE BELOW -28 LWD)

EX. MINOR CONTOUR

(RED ABOVE -28LWD)

(BLUE BELOW -28 LWD)

EX. MAJOR CONTOUR

-26

-2

-26

-2

-26

-27

-2

D E

T R

CN104

2877639.8695424051.4642POINT 4

2877896.8374424121.6984POINT 3

2878035.3165424634.0560POINT 2

2877485.5703424337.5005POINT 1

A Z

C O

N /D

S P

A S

E D

E N

T R

E M

E D

A Z

C O

C N

.d g n

GENERAL SHEET NOTES

SOURCE MATERIAL AREA AND CONTINUE WESTWARD.

REQUIRED DREDGE SHALL START AT EAST LIMIT OF REQUIRED LAYER A 8.

FROM A 1' X 1' AVERAGE DATASET.

7. THE SOUNDING CONTOURS INDICATED HEREIN REPRESENT DATA DERIVED

6. THE PROJECT DEPTH FOR THIS AREA IS 28.0'.

POSITION AND CANNOT BE CONSIDERED FOR NAVIGATION.

5. THE LOCATION OF NAVIGATION BUOYS REPRESENTS THEIR GENERAL

(2201), NORTH AMERICAN DATUM 1983 (NAD 83), US SURVEY FOOT.

STATE PLANE COORDINATE SYSTEM, LAMBERT PROJECTION, NORTH ZONE

4. THE GRID COORDINATE SYSTEM SHOWN IS REFERENCED TO THE MINNESOTA

USACE VESSEL YARD, 901 MINNESOTA AVENUE, DULUTH, MN.

CONTROL POINT "CHIMNEY" LOCATED ON THE WAREHOUSE CHIMNEY AT THE

BASE STATION LOCATED AT US ARMY CORPS OF ENGINEERS (USACE)

GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) CORRECTIONS FROM A

3. HORIZONTAL POSITIONING IS DETERMINED USING REAL TIME KINEMATIC (RTK)

DEPTHS ARE MEASURED USING AN R2SONIC 2024 MULTIBEAM SONAR.

AUTOMATED NOAA GAGE LOCATED AT DULUTH, MINNESOTA (9099064).

OBTAINED WITH RTK GPS VALUES THAT HAVE BEEN VERIFIED TO MATCH AN

MEAN WATER LEVEL AT RIMOUSKI QUEBEC. WATER LEVEL READINGS WERE

DATUM 1985 (IGLD 85) LOW WATER DATUM ELEVATION 601.1 FEET ABOVE

2. SOUNDING DEPTHS ARE REFERENCED TO INTERNATIONAL GREAT LAKES

PRESENT AT THAT TIME.

CAN ONLY BE CONSIDERED AS INDICATING THE GENERAL CONDITIONS

SURVEYS MADE ON AUGUST 7, OCTOBER 10, AND NOVEMBER 12, 2019 AND

1. THE INFORMATION DEPICTED ON THIS MAP REPRESENTS THE RESULTS OF

(8,000 C.Y.)

ELEVATION

TO MIN. -28 L.W.D.

SOURCE MATERIAL AREA

REQUIRED LAYER A

DULUTH ANCHORAGE AREA

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CERTIFIED FINAL - READY TO ADVERTISE

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®of Engineers

US Army Corps

U .S

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DS: LRE_Screen.dscript.dscriptPD: LRE_pdf.pltcfg2:35:26 PM 6/23/2020

...\Active Projects\I-RAP-Duluth, MN (402563)-AZCON Corp. Sediment Remediation\3 - CADD\CAD_BIM\_Sheets\

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CN301

T R

SCALE: 1" = 4'

EXISTING SURFACE

REQUIRED FILL AREA E - SECTION

DOCKWALL

EXISTING

SCALE: 1" = 2'

SCALE: 1' = 4'

SCALE: 1" = 4'

EXISTING SLIP FLOOR

-22 LWD

REQUIRED SUBAQUEOUS CAP TRANSITION SECTION

10 TYP.

TRANSITION AREA

CAP APRON LIMITS

EXISTING SLIP FLOOR

AS SHOWN ON SHEET CN102

DREDGING TRANSITION ZONE

LIMITS OF REQUIRED

EXISTING SLIP FLOOR

DEEP DREDGE LIMIT

REQUIRED 30-IN.

DEEP DREDGE LIMIT

REQUIRED 30-IN.

MEET EXISTING GRADE

GENERAL SHEET NOTES

(-7 LWD.)

SCALE: 1" = 4' 0 4' 8'0 4' 8'

0 4' 8'

4 TYP.

-28 LWD

EXISTING SLIP FLOOR

S T L

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BOTTOM: 6" LAYER A MATERIAL

TOP: 6" 2-INCH STONE

REQUIRED

TRANSITION ZONE AS SHOWN ON CN103

REQUIRED SUBAQUEOUS CAP

LAYER A MATERIAL TO -22 LWD.

FILL DEPRESSION WITH

BOTTOM: 18" LAYER A MATERIAL

TOP: 6" 2-INCH STONE

REQUIRED CAP

BOTTOM: 12" LAYER A MATERIAL

MIDDLE: 4" 2-INCH STONE

TOP: 8" 4-INCH STONE

REQUIRED CAP

BOTTOM: 12" LAYER A MATERIAL

MIDDLE: 4" 2-INCH STONE

TOP: 8" 4-INCH STONE

REQUIRED CAP

NOTE: AREA A TO BE DREDGED 30 INCHES BEFORE PLACEMENT OF MATERIAL.

REQUIRED SUBAQUEOUS CAP AREA A AND TRANSITION ZONE - SECTION

REQUIRED FILL AREA B AND TRANSITION ZONE - SECTION

BOTTOM: 12" LAYER A MATERIAL

MIDDLE: 4" 2-INCH STONE

TOP: 8" 4-INCH STONE

REQUIRED CAP

BOTTOM: 12" LAYER A MATERIAL

MIDDLE: 4" 2-INCH STONE

TOP: 8" 4-INCH STONE

REQUIRED CAP

AS IDENTIFIED ON SHEETS CN103 AND CN104.

APRON SURFACE SHALL BE CONSTRUCTED WITH MAX. SLOPE OF 1V:4H AND MIN. WIDTH

THICKNESS TO THE EXISTING SEDIMENT BED.

ON SHEETS CN103 AND CN104 TO TAPER THE CAPPING MATERIAL FROM THE FULL CAP

NOTE: THE SUBAQUEOUS CAP APRON SHALL BE CONSTRUCTED AT THE LOCATION IDENTIFIED

CN103

4 TYP.

FORMER DOCK WALL

REQUIRED SUBAQUEOUS CAP APRON SECTION - AREA C

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CERTIFIED FINAL - READY TO ADVERTISE

U N

CAP REQUIRED AREA C

CN501 FOR CAP THICKNESS TOLERANCES.

CAP LAYER THICKNESS SHOWN HEREIN ARE MINIMUM VALUES. SEE SHEET 9.

PREVENTS MUDWAVES.

CONTAMINATED SEDIMENT WITH THE REQUIRED CAP AND FILL MATERIAL, AND

MINIMIZE THE DISPLACEMENT AND/OR MIXING OF THE UNDERLYING

THE CONTRACTOR SHALL UTILIZE BEST MANAGEMENT PRACTICES THAT 8.

REQ’D THICKNESS SPECIFIED.

SHALL NOT EXCEED MORE THAN 6 INCHES GREATER THAN THE MINIMUM

THE CONSTRUCTED THICKNESS OF EACH LAYER OF THE SUBAQUEOUS CAP 7.

IDENTIFIED IN SPEC SECTION 35 20 24.

THE REQUIRED 2-IN STONE AND 4-IN STONE SHALL CONSIST OF MATERIAL 6.

AND SPEC SECTIONS 35 20 23 & 35 20 24.

FROM THE FEDERAL NAVIGATION CHANNEL AS IDENTIFIED ON SHEET CN105

THE REQUIRED LAYER A CAP MATERIAL SHALL CONSIST OF DREDGED MATERIAL 5.

REPRESENTATIVE OF THIS PROJECT’S ACTUAL CONDITIONS.

THE EXISTING SLIP SURFACE SHOWN IS FOR EXAMPLE ONLY AND IS NOT 4.

UPON PLACEMENT.

THE CONTRACTOR SHOULD ANTICIPATE SETTLEMENT OF THE CAP MATERIAL 3.

LEVELING GRADE, CONTRACTOR SHALL COORDINATE WITH COR FOR DIRECTION.

SUBAQUEOUS CAP OR FILL AREAS EXTEND MORE THAN 2 FEET ABOVE FINAL

DEBRIS IS ANTICIPATED IN DREDGE AREAS. IF DEBRIS OBJECTS WITHIN 2.

ZONE SLOPE AND CONTINUE AT A 1V:4H SLOPE AS SHOWN ON SHEET CN301.

REQUIRED DREDGE IN TRANSITION AREAS WILL START AT TOP OF TRANSITION

CONTINUE EASTWARD TO PREVENT SLOUGHING OF THE SEDIMENT SLOPE.

REQUIRED DREDGE AT AREA A SHALL START AT FORMER DOCKWALL AND 1.

REQUIRED CAP AREA

FLOOR.

DOWNWARDS UNTIL IT INTERSECTS WITH THE EXISTING SLIP

NOTE: THE REQUIRED CAP AT THE PERIMETER OF AREA E MUST EXTEND

REQUIRED AREA E

TOP: 6" 2-INCH STONE

REQUIRED CAP

FLOOR.

INTO THE SLOPE SHOWN UNTIL IT INTERSECTS THE EXISTING SLIP

NOTE: THE REQUIRED CAP WITHIN THE TRANSITION AREA MUST EXTEND

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C H

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K E

D B

D R

A W

N B

U E D

A T

2 3 4 5 6 7 8 9 10

SHEET ID

®of Engineers

US Army Corps

U .S

A R

M Y C

O R

P S O

F E

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A AF

P S

C O

G I

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GENERAL SHEET NOTES

REQUIRED SUBAQUEOUS CAP AREAS A, B & D - SECTION

SCALE: 1" = 4'

EXISTING SLIP FLOOR

4 TYP.

BOTTOM: 18" LAYER A MATERIAL

TOP: 6" 2-INCH STONE

REQUIRED CAP

AREA D

DREDGE 5 FEET BELOW EX. SLIP FLOOR

SLIP FLOOR IN AREA D

DREDGE 5 FT. BELOW EX.

AREA A

DREDGE 2.5 FEET BELOW EX. SLIP FLOOR

AREA B

NO DREDGING IN AREA B

AND 6" OF 2" STONE

6" OF LAYER A MATERIAL

AREA B SUBAQUEOUS CAP TO BE

BOTTOM: 6" LAYER A MATERIAL

TOP: 6" 2-INCH STONE

REQUIRED CAP

CN302

CN103

0 4' 8'

AND 6" OF 2" STONE

18" OF LAYER A MATERIAL

AREA A SUBAQUEOUS CAP TO BE

A N

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EX. SLIP FLOOR IN AREA D

DREDGE 30-INCH BELOW

SCALE: 1" = 4' 0 4' 8'

REQUIRED SUBAQUEOUS CAP AREAS A, C & D - SECTION

AREA D

DREDGE 5 FEET BELOW EX. SLIP FLOOR

EXISTING SLIP FLOOR

AREA A

AND 6" OF 2" STONE

18" OF LAYER A MATERIAL

AREA A SUBAQUEOUS CAP TO BE

AND 6" OF 2" STONE

18" OF LAYER A MATERIAL

AREA D SUBAQUEOUS CAP TO BE

BOTTOM: 18" LAYER A MATERIAL

TOP: 6" 2-INCH STONE

REQUIRED CAP

EX. SLIP FLOOR IN AREA D

DREDGE 5 FT. BELOW

AREA C

12" OF LAYER A MATERIAL

4" OF 2" STONE ON

8" OF 4" STONE ON

AREA A SUBAQUEOUS CAP TO BE

BOTTOM: 12" LAYER A MATERIAL

MIDDLE: 4" 2-INCH STONE

TOP: 8" 4-INCH STONE

REQUIRED CAP

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A L L R

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DREDGE 30 INCHES BELOW EX. SLIP FLOOR

EX. SLIP FLOOR IN AREA A

DREDGE 30 IN. BELOW

AND 6" OF 2" STONE

18" OF LAYER A MATERIAL

AREA D SUBAQUEOUS CAP TO BE

R O

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CERTIFIED FINAL - READY TO ADVERTISE

U N

CN501 FOR CAP THICKNESS TOLERANCES.

CAP LAYER THICKNESSES SHOWN HEREIN ARE MINIMUM VALUES. SEE SHEET 9.