MMD Bulkhead Installation - Amendment 1 - 2024.08.20.pdf

AMENDMENT NO. 1

W912P424B0005

15 AUGUST 2024

BULKHEAD GUIDE INSTALLATION

MOUNT MORRIS DAM

MOUNT MORRIS, NEW YORK

1. CONTRACTOR INQUIRIES

2. SUMMARY OF CHANGES

3. UPDATED PLANS

4. ATTACHMENTS

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The following changes have been made to the plans and specifications.

1. Plans

a. Added Note 13 to General Notes to clarify the debris to be removed for installation contract.

b. Updated verbiage of Notes 9 and 10 on page C-101.

i. Clarification on cofferdam timeframes.

ii. Clarification on material removal upon completion

c. Updated verbiage of Note 4 on page C-303 for clarification.

d. Updated Note 3 on page S-502.

i. Added dimensions and weight of bulkheads.

ii. Additional information on paint touch-up.

2. Specifications

a. Added attachment of previous cofferdam pictures, for information only.

WORK AREA

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LOCALITY MAP

MORRIS

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LAKE ERIE

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SALAMANCA

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SYRACUSE

UTICA

OGDENSBURG

MASSENA

KINGSTON

PENNSYLVANNIA

OSWEGO

VICINITY MAP

LANCASTER

MT. MORRIS

GUIDES AND BULKHEADS AT EACH CONDUIT.

REMAINING DEBRIS AND EXCAVATE AS NECESSARY TO ACCESS AND INSTALL

CONTRACT BY OTHERS IN THE JULY TO AUGUST TIME FRAME. REMOVE ANY

FLOATABLE DEBRIS IS REMOVED UNDER AN ANNUAL DEBRIS REMOVAL 13.

GOVERNMENT.

TRANSPORTATION. ANY DAMAGE MUST BE REPAIRED AT NO COST TO THE

DAMAGE TO THE PAINT ON THE BULKHEADS DURING BOTH STORAGE AND

INSTALLATION OF THE BULKHEAD. BEARING PAD SURFACE SHALL PREVENT

FOR THE LOAD HANDLING EQUIPMENT USED TO FACILITATE THE SAFE

THE CONTRACTOR WILL BE REQUIRED TO CREATE A BEARING PAD/ SURFACE 12.

THE INSTALLATION OF THE GUIDES AT EACH CONDUIT.

CONTRACTOR IS TO TEST FIT EACH SET OF STACKABLE BULKHEADS AFTER 11.

MAINTENANCE AREAPRIOR TO THE START OF CONSTRUCTION.

PREFABRICATED GUIDES WILL BE LOCATED WITH MOUNT MORRIS DAM

THE 9 COUNDUITS THAT PASS THROUGH THE DAM. ALL OF THE

CONTRACTOR IS TO INSTALL A SET OF BULKHEAD GUIDES AROUND EACH OF 10.

THEY ARE SCHEDULED TO REMAIN AS PART OF THE FINAL PROJECT.

INCLUDE IN THE BID THE COST NECESSARY TO RESTORE SUCH ITEMS IF

ACCOMPLISH THE WORK SHOWN/DESCRIBED. THE CONTRACTOR IS ALSO TO

EXISTING SITE FEATURES AND APPURTENANCES NECESSARY TO

CONTRACTOR IS TO INCLUDE IN THE BID THE COST OF REMOVING ANY 9.

AND/OR WITHIN THE MOUNT MORRIS DAM RECREATION AREAS.

OTHER CONTRACTORS WORKING AT AND AROUND VISITORS CENTER ROAD

CONTRACTOR IS TO COORDINATE WORK WITH THE GOVERNMENT AND 8.

OFFICER.

PARKING LOTS EXCEPT WHERE AUTHORIZED BY THE CONTRACTING

CONTRACTOR CANNOT PARK VEHICLES AND/OR EQUIPMENT ON ROADS OR 7.

AND/OR RELOCATIONS REQUIRED TO COMPLETE THE PROJECT.

RESPONSIBLE FOR ALL COSTS ASSOCIATED WITH ANY UTILITY PROTECTION

UTILITIES WHETHER SHOWN ON THE PLANS OR NOT. CONTRACTOR IS

CONSTRUCTION. VERIFY THE ACTUAL LOCATION AND ELEVATIONS OF

CONTRACTOR IS RESPONSIBLE FOR PROTECTION OF UTILITIES DURING 6.

CONTRACTOR.

SATISFACTION OF THE CONTRACTING OFFICER AT THE EXPENSE OF THE

ARE TO BE RESTORED TO PRECONSTRUCTION CONDITION TO THE

(UNLESS DESIGNATED OTHERWISE) BY THE CONTRACTOR'S OPERATIONS

LANDSCAPING, AND OTHER IMPROVEMENTS AND VEGETATION DISTURBED

APPURTENANCES, SIGNS, RAILINGS, CULVERTS, FENCES, TREES,

PROPERTY. ROADS, TRAILS, UTILITIES, STORM SEWERS AND

CONTRACTOR IS RESPONSIBLE FOR PRESERVATION OF PUBLIC AND PRIVATE 5.

MATERIALS UPON COMPLETION OF WORK EACH DAY.

CLEAN AND FREE FROM DEBRIS, MUD, EQUIPMENT AND CONSTRUCTION

STREETS AND PARKING AREAS ADJACENT TO THE PROJECT ARE TO BE 4.

SEE PERMITS AND RESPONSIBILITIES CLAUSE WITHIN THE SPECIFICATIONS.

ALL PERMITS, PAYING ALL FEES, ETC. REQUIRED TO COMPLETE THE WORK.

UNLESS STATED OTHERWISE CONTRACTOR IS RESPONSIBLE FOR OBTAINING 3.

RECREATIONAL USERS, AND PROJECT VISITORS.

TO ENSURE THE PROTECTION OF ALL PERSONS, INCLUDING EMPLOYEES,

REQUIREMENTS. CONTRACTOR IS TO EXERCISE PRECAUTIONS AT ALL TIMES

FEDERAL, STATE, AND LOCAL REQUIREMENTS, INCLUDING SAFETY

CONTRACTOR IS RESPONSIBLE FOR COMPLYING WITH ALL APPLICABLE 2.

MAIN ENTRANCE OF THE DAM.

ACCESS TO THE UPSTREAM FACE OF THE DAM CAN BE ATTAINED FROM THE 2.

DRAWINGS AND DESCRIBED IN THE SPECIFICATIONS PRIOR TO BID.

CONTRACTOR IS TO VERIFY EXISTING CONDITIONS SHOWN ON THE

THE PROJECT SITE IS LOCATED AT THE MOUNT MORRIS DAM. THE 1.

GENERAL NOTES

ABBREVIATIONS

CONCRETECONC

CLEAR(ANCE)CLR

CENTER LINECL

CONSTRUCTION JOINTCJ

CAST-IN-PLACECIP

BOTH SIDESBS

APPROXIMATEAPPROX

AMERICAN NATIONAL STANDARDS INSTITUTEANSI

AMERICAN INSTITUTE OF STEEL CONSTRUCTIONAISC

ADJACENT, ADJOINING, ADJUSTABLEADJ

ADHESIVEADH

AMERICAN CONCRETE INSTITUTEACI

ABOVEABV

ANGLEL

ELECTRICELEC

ELEVATION - GRADE OR BUILDINGEL

EXPANSION JOINTEJ

EACH FACEEF

EACHEA

EASTE

DRAWINGDWG

DIAMETERDIA

DEMOLITIONDEMO

DEGREEDEG

WELDED WIRE REINFORCEMENTWWR

WEIGHTWT

WITHOUTW/O

WIRE MESHWM

WITHW/

WESTW

UTILITYUTIL

TYPICALTYP

TOPOGRAPHYTOPO

THICK(NESS)THK

SLEEVESLV

SEALANTSLNT

STORM DRAINSD

SOUTHS

REINFORCED CONCRETE PIPERCP

RADIUSR

POLYVINYL CHLORIDEPVC

POUNDS PER SQUARE INCHPSI

POUNDS PER SQUARE FOOTPSF

PLATEPL

POLEP

OVERHEADOH

OUTSIDE DIAMETEROD

ON CENTER EACH WAYOCEW

ON CENTEROC

NOT TO SCALENTS

NORTHN

MISCELLANEOUSMISC

MINIMUMMIN

MANHOLEMH

MAXIMUMMAX

POUNDLB

JOINTJT

INCHIN

FEETFT

SITE ACCESS MAP

INSET 1

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PUBILC

ACCES

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ACCESS

ROAD

SEE INSET 1

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STAGING AREA

PARK

ROAD

LETCHWORTH STATE PARK

GRAVEL A

CCES

S R

OAD

GRAVEL A

CCES

S R

OAD

STAGING AREA

PUBLIC

PARKIN

G

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WORK SITE PLAN

SCALE: 1"=400'

A7

STAGING AREA PLAN

SCALE: NTS

VISITOR CENTER

DETERMINED ON SITE

EXACT LIMITS TO BE

CONTRACTOR STAGING AREA -

TRAINING WALLS

MOUNT MORRIS DAM

POWER LINES

LOG BOOM

CONSTRUCTION.

BE LOCKED DURING

EXISTING GATE TO

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COFFERDAM.

APPROXIMATE LOCATION OF PLACEMENT OF

APPROXIMATE LOCATION OF CONDUITS NO. 7 - 9.

W P

B

1-6 COFFERDAM.

APPROXIMATE LOCATION OF PLACEMENT OF

APPROXIMATE LOCATION OF CONDUITS NO. 1-6.

WEIGHT OF 4,200 LBS EA.

FENCE. BULKHEADS HAVE APPROX.

AND GUIDES - STACKED ALONG

APPROX. LOCATION OF BULKHEADS

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1 98765432

0'

640'660'

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680'

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TRUE NORTH

PLAN AND

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PLAN AND

PARKING LOT

®of Engineers

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ALLOW FOR UN-IMPEDED FLOW OF THE RIVER TO THE GATE STRUCTURES.

COMPLETELY REMOVE TEMPORARY COFFERDAM MATERIAL THAT WILL

UPON COMPLETION OF THE ASSOCIATED WORK, CONTRACTOR IS TO 10.

.BEING COMPLETED IN THE MAXIMUM FIVE DAYS

TIME FRAME MAY EXTEND IF HYDROLOGICAL CONDITIONS PRECLUDE WORK

LESS THAN A MINIMUM OF TWO DAYS AND NO GREATER THAN FIVE DAYS.

INSTALLATION AND BULKHEAD TEST FITTING WORK IS ACHIEVED BUT NO

COFFERDAM UNTIL SUCH TIME THAT COMPETION OF THE GUIDE

CONTRACTOR IS TO MAINTAIN DEWATERED CONDITIONS WITHIN THE 9.

THE RIVER TO ACCESS THE GATE AREAS.

TEMPORARY ACCESS PATH TO THE RIVER AND ALONG THE NORTH BANK OF

GENESEE RIVER AND ADDITIONAL WORK SUCH AS CONTRUCTION OF A

THIS WORK IS TO INCLUDE ALL NECESSARY PROVISIONS FOR CROSSING THE 8.

GOVERNMENT.

SHEET PILING, OR ANY OTHER ACCEPTABLE MATERIALS APPROVED BY THE

INCLUDE EMBANKMENT SOIL, SAND BAGS, METAL AND/OR OTHER TYPES OF

TEMPORARY COFFERDAM TO ACHIEVE ISOLATION OF GATES 7 - 9 WHICH CAN

PROVIDE ALL NECESSARY MATERIALS AND EQUIPMENT TO CONSTRUCT 7.

GATES 7 TO 9.

DEBRIS REMOVAL, AND DEWATERING OF THE UPSTREAM DAM FACE AT

CONTRACTOR TO INSTALL TEMPORARY COFFERDAM FOR THE ISOLATION, 6.

VERTICAL DATUM 1929 (NGVD29).

THE VERTICAL DATUM FOR THIS WORK IS THE NATIONAL GEODETIC 5.

GOVERNMENT-FURNISHED BENCH MARKS.

THE FLOORS OF THE CONDUIT ENTRANCES (EL. 585.0) WILL SERVE AS THE 4.

IMAGERY OBTAINED FROM THE NYGIS CLEARINGHOUSE, IMAGERY DATE - 3.

RESULT OF AERIAL LIDAR MAPPING PERFORMED IN 2018.

CONTOURS AND ELEVATIONS SHOWN IN THE "WORK SITE PLAN" ARE THE 2.

ENGINEER DISTRICT, BUFFALO.

INSPECTION IN THE H&H AND WATER MANAGEMENT SECTION, U.S. ARMY

ADDITIONAL DATA CONCERNING POOL ELEVATIONS IS AVAILABLE FOR 1.

GENERAL NOTES

C-301

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SCALE: 1" = 200'

TRAINING WALL

MOUNT MORRIS DAM

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CERTIFIED FINAL - RTA

GATES 7 TO 9.

AND DEWATERING OF THE UPSTREAM DAM FACE AT

COFFERDAM FOR THE ISOLATION, DEBRIS REMOVAL,

CONTRACTOR TO INSTALL TEMPORARY

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COFFERDAM LOCATION FOR CONDUITS 7-9

SCALE: NTS

EDGE OF SPILLWAY

EXISTING GROUND

(ELEV. 584.0')

EXCAVATION OF SILT LIMIT

AND SEDIMENT ARE TO BE REMOVED

AREA WHERE FLOATABLE DEBRIS

EDGE OF SPILLWAY

MONOLITH JOINTS

WIDTH OF SPILLWAY

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ALLOW FOR UN-IMPEDED FLOW OF THE RIVER TO THE GATE STRUCTURES.

COMPLETELY REMOVE TEMPORARY COFFERDAM MATERIAL THAT WILL

UPON COMPLETION OF THE ASSOCIATED WORK, CONTRACTOR IS TO 5.

BEING COMPLETED IN THE MAXIMUM FIVE DAYS.

TIME FRAME MAY EXTEND IF HYDROLOGICAL CONDITIONS PRECLUDE WORK

LESS THAN A MINIMUM OF TWO DAYS AND NO GREATER THAN FIVE DAYS.

INSTALLATION AND BULKHEAD TEST FITTING WORK IS ACHIEVED BUT NO

COFFERDAM UNTIL SUCH TIME THAT COMPETION OF THE GUIDE

CONTRACTOR IS TO MAINTAIN DEWATERED CONDITIONS WITHIN THE 4.

THE RIVER TO ACCESS THE GATE AREAS.

TEMPORARY ACCESS PATH TO THE RIVER AND ALONG THE NORTH BANK OF

GENESEE RIVER AND ADDITIONAL WORK SUCH AS CONTRUCTION OF A

THIS WORK IS TO INCLUDE ALL NECESSARY PROVISIONS FOR CROSSING THE 3.

GOVERNMENT.

SHEET PILING, OR ANY OTHER ACCEPTABLE MATERIALS APPROVED BY THE

INCLUDE EMBANKMENT SOIL, SAND BAGS, METAL AND/OR OTHER TYPES OF

TEMPORARY COFFERDAM TO ACHIEVE ISOLATION OF GATES 7 - 9 WHICH CAN

PROVIDE ALL NECESSARY MATERIALS AND EQUIPMENT TO CONSTRUCT 2.

GATES 7 TO 9.

DEBRIS REMOVAL, AND DEWATERING OF THE UPSTREAM DAM FACE AT

CONTRACTOR TO INSTALL TEMPORARY COFFERDAM FOR THE ISOLATION, 1.

GENERAL NOTES

CONDUIT NO. 8CONDUIT NO. 9 CONDUIT NO. 7

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FOR DAM CONDUIT

EDGE OF CURVED OPENING

(TYP)

1" DIA. ANCHOR BOLTS

1-1/8" DIA. HOLE FOR

FABRICATED GUIDES

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GALV. WASHER.

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GALV. NUT.

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GALV. ANCHOR BOLT.

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SCALE: 1/2" = 1'-0"

BULKHEAD GUIDE INSTALLATION DIMENSIONS TYPICAL CROSS SECTION OF GUIDE INSTALLATION

SCALE: 3" = 1'-0"

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S-502

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OR HIGHER.

NUT TO BE ASTM A563 GALVANIZED, GRADE B

NUT. WASHER TO BE ASTM F436 GALVANIZED.

(1) WASHER TO BE SET BETWEEN GUIDE AND 5.

SPEC SECTION 03 30 00.

INSTALLED WITH A TWO-PART EPOXY GROUT, PER

12" OF EMBEDMENT. ANCHOR BOLTS ARE TO BE

A449 GR. 90 THREADED RODS WITH A MINIMUM OF

ALL ANCHOR BOLTS ARE TO BE GALVANIZED ASTM 4.

SCRAPED OFF DURING TEST FIT.

CONTRACTOR TO TOUCH-UP ANY PAINT THAT IS

OF THE CONTRACTING OFFICER'S REPRESENTATIVE.

GUIDES TO ENSURE PROPER FIT IN THE PRESENCE

EACH OF THE CONDUITS UPON INSTALLATION OF

(APPROX. 9'-7"W x 5'-7"H, 4200 LBS EA.) AROUND

CONTRACTOR IS TO TEST FIT THE BULKHEADS 3.

CONDUITS.

ONE BULKHEAD GUIDE AROUND EACH OF THE DAM

CONTRACTOR IS RESPONSIBLE FOR INSTALLING 2.

PROVIDED TO THE CONTRACTOR.

NINE (9) SETS OF BULKHEAD GUIDES ARE TO BE 1.

GENERAL SHEET NOTES

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2013 Cofferdam/Berm Reference Photos

The following photos are for information only. This cofferdam/berm was installed in 2013 as part of a debris contract. This cofferdam was located between conduits

6 and 7. Since 2013 the sediment bar in front of the dam has changed, and conditions shown in the photo do not reflect the current conditions.

FOR REFERENCE ONLY