B.08.03 W9123720B0001-0002.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

Due to the changing needs of the Government, the above referenced Invitation For Bid for Dam Safety Modification Additional Relief Wellsand Collector System Upgrades Mohaw k Dam, Warsaw , Ohio is hereby AMEDNED as follow s:

The Bid Schedule is revised in its entirety;

Specif ications Section 33 26 00.00 10, Page 6, Sub Section 2.2 - Riser Pipe, minimum steel pipe size correction;

Draw ing CU502 is replaced in its entirety.

All other terms and conditions remain unchanged.

1. CONTRACT ID CODE PAGE OF PAGES

1 5

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 29-May-2020

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street , County, State and Zip Code) X W9123720B0001

X 9B. DATED (SEE ITEM 11)

04-May-2020

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN

REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

29-May-2020

CODE

USACE, CONTRACTING DIVISION

KAREN SIMMONS, 502 8TH STREET

HUNTINGTON WV 25701

W91237 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION 00 10 00 - SOLICITATION

BASE BIDDING SCHEDULE

ITEM NO. DESCRIPTION

ESTIMATED

QUANTITY UNIT

UNIT

PRICE

ESTIMATED

AMOUNT

1 Reimbursement of Actual Cost of Performance and Payment Bonds for Bids in Excess of $250,000

1 Job Sum (not to exceed)

2 Mobilization and Demobilization 1 Job Sum

3 Contractor-Furnished Government Office 12 Mo. $ $

4 Contractor-Furnished Janitorial Services 12 Mo. $ $

Erosion, Sediment Controls, and Environmental Protection 1 Job Sum

Working "As-built" Documents (Price shall not be less than $10,000) 1 Job Sum

Final "As-built" Documents (Price shall not be less than $20,000) 1 Job Sum

Trench Excavation for Drainage Features to be Removed 1,760 LF

9 Dewatering 1 Job Sum

10 Topsoil 700 CY $ $

11 Seepage Berm Material 2,910 CY

12 ODOT Type D Riprap 110 CY $ $

13 Filter Fabric 330 SY

14 No. 9 Filter Material 60 CY

15 Seeding 5 Acre

16 Relief Well RW-22 117 VLF

17 Relief Well RW-23 120 VLF

18 Relief Well RW-24 117 VLF

19 Relief Well RW-25 117 VLF

20 Relief Well RW-26 114 VLF

21 Relief Well RW-27 110 VLF

22 Relief Well RW-28 107 VLF

23 Relief Well RW-29 105 VLF

Sum

OPTION 1 BIDDING SCHEDULE

ITEM NO. DESCRIPTION

ESTIMATED

QUANTITY UNIT

UNIT

PRICE

ESTIMATED

AMOUNT

ITEM NO. DESCRIPTION

ESTIMATED

QUANTITY UNIT

UNIT

PRICE

ESTIMATED

AMOUNT

24 Relief Well RW-30 104 VLF

25 Relief Well RW-31 102 VLF

26 Development Surging 160 Hr.

27 Development Pumping 320 Hr.

28 Pumping Tests 30 Hr.

29 12-Inch HDPE 20 LF

30 24-Inch HDPE 250 LF

31 30-Inch HDPE 530 LF

32 36-Inch HDPE 500 LF

33 48-Inch HDPE 200 LF

34 60-Inch Precast Concrete Manhole 1 EA

35 72-Inch Precast Concrete Manhole 4 EA

36 84-Inch Precast Concrete Manhole 2 EA

37 30-Inch Headwall 10 EA

38 36-Inch Headwall 1 EA

39 48-Inch Headwall 2 EA

40 Video Inspection of Pipe

Total for Base (Items 1 thru 40)

1 Job

W9123720B0001

41 Emergency Backfill 1 Job Sum $

Total for Option 1 (Item 41) $______________

Total for Base plus Option 1 (Items 1 thru 41) $______________

(End of Summary of Changes)

IFB No. W9123720B0001 MKW03

SECTION 00 01 15

Excavated material may be used for emergency backfilling.Emergency backfilling of incomplete relief well installations will be performed in the case where the filter pack has not yet been placed. If the filter pack has been fully installed, the Contractor shall install a solid pipe extension to the top of the relief well riser to a minimum height of eight feet above the top of existing grade of the surrounding berm, and backfill the surrounding excavated area to the existing surrounding berm grade.

1.7 PUMP TESTING

Step-drawdown pump testing shall be performed on RW-25 following installation and development (Paragraph PUMP TEST), and specific capacity pump testing shall be performed on the other nine wells (Paragraph SAND

TEST).

PART 2 PRODUCTS

2.1 WELL SCREEN

Well screen shall be constructed of stainless steel having an inside diameter of not less than twelve inches Submit the proposed well screen prior to installation. Screen openings shall be uniform in size and pattern, and shall be spaced approximately equally around the circumference of the pipe.

2.1.1 Stainless Steel Well Screen

The well screen and fittings shall be fabricated entirely from stainless steel conforming to ASTM A312/A312M, AISI Type 304. The well screen shall be of stainless steel welded rod and wire wrapped construction, continuous slot screens. The screen shall be a commercially manufactured screen of demonstrated structural ability for gravel wall relief wells to a depth of greater than 100 feet and shall be of a type which has been successfully used in similar installations. The well screen, pipe, and fittings shall have a minimum collapse strength of 104 psi. The screen, pipe, and fittings shall have a clear inside diameter of 11.8 inches.

2.1.1.1 Couplings

Couplings for the stainless steel well screen shall consist of the same material as the well screen and shall be threaded, flanged, and/or fitted with a welding ring. The couplings shall conform in design to the couplings recommended by the manufacturer of the well screen.

2.1.1.2 Perforations

The 12 inch diameter well screen shall have a number 80 slot, 0.080-inch open slot. There shall be a total opening of not less than 167 square inches per foot of 12 inch diameter well screen.

2.2 RISER PIPE

The relief well riser pipe and any blank sections required shall be 11.8 inch inside diameter stainless steel pipe and shall be a minimum of Schedule 10 (0.180-inch) in wall thickness compatible with the requirements specified in Paragraph WELL SCREEN. Couplings to the well screen and between riser pipe and solid blank sections shall be as specified for the well screen pipe. Solid blank sections shall be placed through relatively impervious (e.g. silt and clay) zones of the foundation as identified in

SECTION 33 26 00.00 10 Page 6

3/8"

5/8" x 1" SLOT (2)

3"

3"

1"

5/8"

/2

4"1"

10"

3/8" X 1" ALUM.

DRILL 7/16" DIA. (TYP.)

SEAT SMOOTH

MACHINE VALVE

EQUALLY SPACED

WITH NUT AND WASHER

" ø BRASS BOLTS (4) 8

RUBBER GASKET

" CLOSED CELL NEOPRENE8

" ALUMINUM4

" ø ALUMINUM RODS8

" ALUMINUM 4

1C ø X

(TYP.)

BAR 3"x1/2"

SEE SECTION B-B THIS SHEET

BENT P 3" x x 18" (+), AROUND MANHOLE

2' WIDE X 4" THICK CONCRETE PAD

3/8" ALUM. TREAD PLATE

PLATE 4" X 3/8" X 8"

ROD - DIA. X 1' 1

12" ø SS PIPE

PERMANENT STEEL CASING

30" DIA. A-36

CONCRETE

STEEL RISER PIPE

12" DIA. TYPE 304 STAINLESS

FILTER PACK

(TYP.)

EACH WAY, 2 ROWS

NO. 4 BAR @ 12" c/c(8' X 8')

PAD

CONCRETE

INTO CONCRETE PAD

CASING TO EXTEND 6"

TOP OF 30" PERMANENT

PIPE TO HEADWALL.

CONNECT OUTLET

OUTLET PIPE

POLYETHYLENE

N-12 CORRUGATED

CASING

POLYETHYLENE PROTECTIVE

48" DIA. N-12 CORRUGATED

FINISH GRADE6

M

IN

FINISH GRADE

PREVENT MATERIAL FROM ENTERING THE WELL

REQUIRED DURING CONSTRUCTION TO

CONTRACTOR TO PROVIDE TEMPORARY CAP

12"

12"

É

LADDER

CONCRETE

6" ABOVE THE

RISER PIPE TO

CUT OFF TOP OF

STEEL BOTTOM PLUG

STAINLESS

20' MAX. INTERVALS)

ON SCREEN (6 MIN. AT

CENTRALIZER STRIPS

M

IN

V A

R

IE

S

TREAD PLATE

HOLE IN

SLOTTED

2" X 7"

CONCRETE

TOP OF

(TYP.)

BENT P 3" x 1/2" x 1'-4"

(TYP.)

BAR 3"x1/2"

3/4" DIA. BOLT

1 1/4" DIA. HOLE FOR

POLYETHYLENE PIPE

N-12 CORRUGATED

PLATE (ALUM.)

3"x3/8"x6"

(ALUM.)

3"x1/2"x1'4"

BENT PLATE

C L

ALUMINUM COVER

1/8"

WASHERS. SEE NOTES 5 & 8

STAINLESS STEEL BOLTS, NUTS & LOCK

BOLTED ON 3" CENTERS WITH ‚" -20

MASS7440-72 OR EQUIVALENT.)

(INDUSTRIAL HDWR. DIST. PART NO.

STAINLESS STEEL CONTINUOUS HINGE

TO REMOVE DEFORMATIONS

PLATE WITHIN LIMITS OF HINGE

MACHINE OR GRIND TREAD

BRACKET (SEE DETAIL)

ALUMINUM MOUNTING(SEE DETAILS)

HANDLE

RETRACTABLE

10"

55"

10"

(NO.80 SLOT 0.080 INCH)

CONTINUOUS SLOT WELL SCREEN.

STAINLESS STEEL, WIRE-WRAPPED,

12" DIAMETER TYPE 304,

CONTINUOUS SLOT WELL SCREEN.

STAINLESS STEEL, WIRE-WRAPPED,

TOP OF 12" DIAMETER TYPE 304,

BAR 3" x 1/2"

BAR 1" DIA. x 1'-4"

#9 GRAVEL #9 GRAVEL

FILTER PACK 6" MIN. THICKNESS SURROUNDING PIPE

REQUIREMENTS OF EM 385-1-1

EXCAVATED SLOPES SHALL MEET

(SEE SHEETS 18 AND 19)

TYPICAL HEADWALL

"4

STRAP SLOT

" LOCKING2

1/2" X 1

6061-T6 TREAD PLATE

3/8" ALUMINUM ALLOY

TREAD PLATE

3/8" ALUM.

PLATE 4" X 3/8" X 8"

BAR 1" X 3/8" X 7"

HOLES IN 3/8" PLATE

" SLOTTED8

5/8" X 1

BAR 1" DIA. x 1'-4"

1"1"

24"

6" TOPSOIL 6" TOPSOIL

ANIMAL GUARD

A B C D E F G H I J

E

G

F

D

B

I

H

C

J

A

"2

CL

STEEL COMPONENTS MEET ALUMINUM.

4. USE ISOLATION WASHERS WHERE STAINLESS

NUTS, & LOCK WASHERS.

WITH 9/16" DIA. STAINLESS STEEL BOLTS,

3. MOUNTING BRACKETS TO BE ATTACHED

MIN. SLOT LENGTH - 1" ( 1 1/2" MAX)

2. MIN SLOT WIDTH-5/8" (3/4" MAX)

ANGLE 3/8" ( OR 1/4" ) THICK

FABRICATE FROM 3" X 3" ALUMINUM1.

NOTES:

(1/4" MIN.)

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2 3 4 5 6 7 8 9 10

SHEET ID

of Engineers

US Army Corps

M O

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A M

W A

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A W

O H

W A

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"16 91 "16

TYP

CHECK VALVE

TYP

TYP

B

DD

A

MATERIAL ALUM. ALLOY 6061-T6

NOTE:

R

"8

MOUNTED SAFETY POST.

SEE NOTE #6 FOR PERMANENTLY

NOTE:

NOTES:

S

Y

S C

L

M R

W -C

U

D

A .d g n

B

N

R E

L

IE

F W

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A

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CU502

E D

G

DEBRIS PROTECTION. SUBMIT PROPOSED ANIMAL GUARD FOR GOVERNMENT APPROVAL.

PIPE OUTFALLS SHALL BE FITTED WITH PLASTIC OR STAINLESS STEEL GRATING DESIGNED FOR ANIMAL / 9.

MEET CONCRETE PAD TO BASE OF FIRST LADDER RUNG.

WHERE LADDER ENDS BITUMEN PAINT SUCH AS AQUA SEAL OR APPROVED EQUAL SHALL BE APPLIED8.

SURFACE CONTACTS ALUMINUM TREAD PLATE.

PROVIDE COAT OF MOLYBDATE ALKYD PRIMER ON BOTTOM OF STAINLESS STEEL HINGE WHERE 7.

NOTED.

RELIEF WELL LADDERS AND COMPONENTS SHALL BE OF ALUMINUM CONSTRUCTION UNLESS OTHERWISE 6.

POST (MODEL LU-4).

PROVIDE PERMANENTLY MOUNTED TELESCOPING SAFETY POST SUCH AS THE BILCO LADDERUP SAFETY 5.

ALUMINUM.

ISOLATION WASHERS SHALL BE USED FOR LOCATIONS WHERE STAINLESS STEEL COMPONENTS CONTACT 4.

LOCKS SHALL BE FURNISHED BY THE CONTRACTOR AS PER THE SPECIFICATIONS.3.

PAINTED.

WITH 0.75 INCH LINE WIDTH) USING EXTERIOR PAINT SUITABLE FOR USE WITH THE MATERIAL BEING

LABEL TOP AND BOTTOM OF RELIEF WELL LIDS WITH BLACK, STENCIL PAINT LETTERS (4-INCHES TALL 2.

GRIND ALL SHARP EDGES SMOOTH.1.

/2

/2

R

E V

IS

E D I

N A

C C

O R

D A

N C

E W

IT

H A

M E

N D

M E

N T

11" R14" 10" 11"12" WELL

WELL � A B C D

MATERIAL

SEEPAGE BERM

NOT TO SCALE

L

DETAIL 1

TYP.

RETRACTABLE HANDLE DETAIL

RELIEF WELL COVER

NOT TO SCALE

NOT TO SCALE

COVER DETAIL

RELIEF WELL

ALUMINUM MOUNTING BRACKET

RELIEF WELL COVER

TYP

ALUMINUM RELIEF WELL LADDER

SECTION B-BELEVATION

TYP

PLAN

CU502

SECTION A-A

SECTION

M A

X

M A

X

M A

X

NOT TO SCALE

A

CU502

TYP.

V A

R

IE

S

L

(T Y

P

B

(TYP.)

ON THIS SHEET

SEE DETAIL 1

NOT TO SCALE

NEW RELIEF WELL TYPICAL SECTION

4' 4'

CHECK VALVE FOR 12" WELL

AT THE DISCRETION OF COR

SEEPAGE BERM MATERIAL OR

NOTES: SEE SPECIFICATIONS FOR CONSTRUCTION REQUIREMENTS.

NOT TO SCALE

3/16"

1/8"

1/2"

1/2" "2

"2

"4

"2

3 1/2"

5"

LOCKING STRAP

RELIEF WELL COVER

NOT TO SCALE

5/27/20