ESBD_364909_1721685431158_RFB 2024-055 Addendum No. 2.pdf

Purchasing Services Post Office Box 2570

Waco, Texas 76702-2570 Phone: 254-750-8098

Fax: 254-750-8063 melaniew@wacotx.gov

CITY OF WACO www.waco-texas.com

Date: 07/22/2024

RFB No: 2024-055 Commodity: Water Transmission – American Plaza to Exchange Parkway – Phase II Purchasing Agent: Melanie Wade

Closing Time: 2:00 P.M. CT, Wednesday, August 21, 2024 Opening Time: 2:01 P.M. CT, Wednesday, August 21, 2024

RFB Opening Location: Via Zoom and Dial In

Addendum No: 2 The date has been extended for question submissions to August 13, 2024 @ 5:00 PM CT.

The date has been changed for bid submissions to August 21, 2024 @ 2:00 PM CT.

See attached for clarifications, questions answered and drawings.

The above-mentioned RFB invitation has been changed in the following manner. Sign and return addendum to the Purchasing Office by the closing time and date with your RFP response. Returning this page signed by your authorized agent will serve to acknowledge this change. All other requirements of the invitation remain unchanged. If you have any questions, please call or stop by the Purchasing Office at the above address.

Firm:

Address

Signature of Person Authorized to Sign Bid:

Signor's Name and Title (print or type):

E-mail Address:

Date: Telephone: Fax:

mailto:melaniew@wacotx.gov http://www.waco-texas.com/

BID NUMBER:

DATE:

TIME: CENTRAL

QUICK LINK:

MEETING ID:

DIAL IN NUMBER:

PASS CODE:

ADDITONAL

INFORMATION:

BID NUMBER:

DATE:

TIME: CENTRAL

QUICK LINK:

MEETING ID:

DIAL IN NUMBER:

PASS CODE:

ADDITONAL

INFORMATION:

PRE BID/ PROPOSAL

BID/ PROPOSAL OPENING

ZOOM ACCESS INSTRUCTIONS & ADDITIONAL INFORMATION

Rev. 1

RFB 2024-055 Page 3 https://wacotx.zoomgov.com/j/1604675079?

https://wacotx.zoomgov.com/j/1609620532?

July 2024 Project RFB 2024-055 Addendum No. 2 00 91 13 - 1

ADDENDUM 2

Project Name: Water Transmission/American Plaza to Exchange Parkway, Phase II Project No.: RFB 2024-055 Owner: City of Waco Engineer: CP&Y, Inc. dba STV Infrastructure

This addendum forms a part of the Contract Documents and modifies the original Project Manual dated June 2024 and Addendum 1. Bidder shall acknowledge receipt of this addendum in the space provided below and in the space provided on the Bid Form. Failure to do so may subject Bidder to disqualification.

BID OPENING:

Bid will be received on August 21st at 2:00 PM.

CLARIFICATION:

Underground piped utilities shall not be constructed, or the pipe laid in the presence of water of any depth or accumulation. All water shall be removed from the excavation prior to the placement of pipe embedment placement to ensure a dry firm granular bed on which to place the embedment. The trench excavation shall be maintained in an unwatered condition until all embedment and a minimum of the first course of backfill installed, compacted and tested. The presence of water, of any nature in the trench, will dictate use of the appropriate embedment detail in accordance with the City of Waco details.

The Contractor is responsible for developing and submitting a dewatering plan for review and approval by the City. Removal of water may be accomplished by bailing, pumping, or by a well-point installation as conditions warrant. The Construction Inspector will review and confirm the conditions that dictate use of the dewatering measures.

If the excavation cannot be dewatered to the point where pipe bedding is free of mud, a concrete seal of 2,000 PSI concrete with a minimum thickness of 3 inches shall be placed in the bottom of the excavation.

Bid item 69, Groundwater Occurrence, will provide compensation for the Contractor for any of the required items of work associated with required dewatering of the trench, including any of the necessary items above as well as wrapping of the embedment. The bid item will be paid at the plan quantity of the pipe installation in linear feet.

CONTRACTOR QUESTIONS:

No. Question Answer

Do the valves 16", 30" and 42" need to have any kind of gearing, spur or beveled? There are no specs given.

See Addendum 1, Question 3

Project RFB 2024-055 Addendum No. 2 00 91 13 - 2

No. Question Answer

2 Is there a place to stockpile on site?

There is limited room to stockpile Valves and other appurtenances at the Owen Elevated Tower site. The Contractor is responsible for locating and acquiring additional storage and stockpile locations.

What material will be required for the vent piping on the air release assemblies since galvanized & PVC piping are allowed and compression fittings are not made for 4" copper per note #2 on detail W-22 & W-23.

See revised details for the 4” ARV construction, Sheet C455 & C456 (attached)

Will a detail be provided for the in-street & off-street 4" combination air & vacuum assembly? The details provided on sheet C411 & C412 are for a 2" assembly.

Updated details of the ARV for in street and off street conditions are provided, See Sheet C455 & C456 (attached)

Can the city confirm double valve isolation will be performed to install the 42" x 30" DIP tee at station 0+08.70?

And will solid sleeves be required on the south side of the tee and the north side of the 42" valve?

To install the 42”x30” Tee on the existing 42” water line, the 42” line will be isolated by closure of the valves as shown on Exhibit A (attached). Any necessary dewatering of the line during the connection process will be at the Contractor’s expense and is included in the applicable bid item. The connection will need to occur at off peak hours. Solid sleeves may be required to connect to the existing 42” line.

Is the mentioned project a lump sum or a unit price bid?

The project is a unit price bid

Do we have to haul off spoils or is there a nearby place to stockpile utility spoils?

All spoils will need to be removed from the project site. It is the Contractor’s means and Methods as to how this occurs.

What type of base should we use if needed?

The requirements for surface replacement and construction methods are located in the plan set.

DRAWINGS:

Add: Construction drawings C455 and C456 are included with this addendum

Please acknowledge receipt of this Addendum No. 2 by signing below and submitting with the Bid.

Acknowledged:

By:

Title:

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,,... ·. 'I , :~., ~ DAVID L. MAREK I

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Project RFB 2024-055 Addendum No. 2 00 9113 - 3

NOTES:

1. FRAME AND COVER SHALL BE 30 IN. X 36 IN. 1/4 IN. HINGED CHECKER PLATE.

2. WATER: NO SWEATED JOINTS, GALVANIZED OR PVC PIPE WILL BE ACCEPTED. USE DUCTILE IRON PIPE WITH FLANGED FITTINGS.

3. PIPE VENT OPENING SHALL BE 12 IN. ABOVE TOP OF CONCRETE VAULT

4. CONCRETE VAULT SHALL BE CONCRETE PRODUCTS, INC. MODEL "M.V.-8-H.L." OR PRE-APPROVED EQUAL.

5. AIR RELEASE VALVES SHALL BE PLACED IN AREAS NOT SUBJECT TO SUBMERGENCE AND OUTSIDE OF TRAFFIC AREAS.

6. THE PLACEMENT OF VAULT SHALL BE ON CITY RIGHT-OF-WAY OR WITHIN APPROPRIATE EASEMENTS AND SHALL BE LOCATED IN SUCH A WAY AS TO CAUSE THE LEAST AMOUNT OF SITE

DISTURBANCE TO RESIDENTS AND TO NOT CREATE A SIGHT OBSTRUCTION FOR TRAFFIC.

7. AIR VENT DISCHARGE SHALL BE LOCATED AND PROTECTED TO ACCOMMODATE SITE CONDITIONS. BOLLARDS OR ENCLOSURE DESIGN SHALL BE SUBMITTED TO CITY OF WACO FOR

APPROVAL. VAULT SHALL BE LOCATED AS CLOSE AS POSSIBLE TO PROPERTY LINES.

8. MINIMIZE ANGLES IN VENT PIPE/TUBING, HORIZONTAL LENGTHS TO BE SLOPED DOWN (NOMINAL 2%) TOWARDS ARV.

16 MESH

SCREEN

NON-CORROSIVE

TERMINATION

VENT CAP

COVER 9 IN. 6 IN. ABOVE GROUND

ENCLOSURE PER PLANS (SITE SPECIFIC TO THE PROJECT)

ELBOW MUST POINT STRAIGHT DOWN

IN

4" DISCHARGE LINE,

DUCTILE IRON PIPE

WATER

30 IN.

IN

48 IN.

PLAN VIEW

4" AIR RELEASE VALVE: CLA-VAL

SERIES 33A COMBINATION AIR

RELEASE AND VACUUM BREAKER

VALVE, PRESSURE CLASS 150 LB

THREADED X FLANGE

12 IN. MIN

ALL SIDES

4" RESILIENT SEAT GATE

VALVE W/ HAND WHEEL

SCALE : NTS

4" AIR RELEASE VALVE AND MANHOLE VAULT (OFF STREET)

8" X 4" FLANGED DIP REDUCER

MANF KNOCK OUT OR SMOOTH CORE

IN MANHOLE WALL FOR PIPE WITH 1

IN. CLEARANCE

30" X 8" MJ X FLANGED DIP TEE

FILL BOTTOM OF MANHOLE WITH

AGGREGATE MEETING ASTM 57

SPECIFICATIONS FROM BOTTOM OF

FLANGE TO 6 IN. BELOW WATER LINE

C455

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NOTES:

1. FRAME AND COVER SHALL BE 30 IN. X 36 IN. 1/4 IN. HINGED CHECKER PLATE.

2. WATER: NO SWEATED JOINTS, GALVANIZED OR PVC PIPE WILL BE ACCEPTED. USE DUCTILE IRON PIPE WITH FLANGED FITTINGS.

3. PIPE VENT OPENING SHALL BE 12 IN. ABOVE TOP OF CONCRETE VAULT

4. CONCRETE VAULT SHALL BE CONCRETE PRODUCTS, INC. MODEL "M.V.-8-H.L." OR PRE-APPROVED EQUAL.

5. AIR RELEASE VALVES SHALL BE PLACED IN AREAS NOT SUBJECT TO SUBMERGENCE AND OUTSIDE OF TRAFFIC AREAS.

6. THE PLACEMENT OF VAULT SHALL BE ON CITY RIGHT-OF-WAY OR WITHIN APPROPRIATE EASEMENTS AND SHALL BE LOCATED IN SUCH A WAY AS TO CAUSE THE LEAST AMOUNT OF SITE

DISTURBANCE TO RESIDENTS AND TO NOT CREATE A SIGHT OBSTRUCTION FOR TRAFFIC.

7. IF WATER MAIN IS IN STREET, VAULT SHALL BE SET 2 FT. BEHIND CURB, UNLESS OTHERWISE SHOWN IN PLANS.

8. AIR VENT DISCHARGE SHALL BE LOCATED AND PROTECTED TO ACCOMMODATE SITE CONDITIONS. BOLLARDS OR ENCLOSURE DESIGN SHALL BE SUBMITTED TO CITY OF WACO FOR

APPROVAL. VAULT SHALL BE LOCATED AS CLOSE AS POSSIBLE TO PROPERTY LINES.

9. MINIMIZE ANGLES IN VENT PIPE/TUBING, HORIZONTAL LENGTHS TO BE SLOPED DOWN (NOMINAL 2%) TOWARDS ARV.

10. MINIMIZE HORIZONTAL DISTANCE BETWEEN MAIN AND ARV.

11. SEAL ALL MANHOLE PENETRATIONS WITH LINK-SEAL PER MANUFACTURES RECOMMENDATIONS.

12. 2 IN. X 2 IN. GALVANIZED SUPPORT ANCHORED TO WALL ON BOTH SIDES.

16 MESH SCREEN

NON-CORROSIVE

TERMINATION VENT CAP

4" VALVE CLA-VAL SERIES 33A

COMBINATION AIR RELEASE AND

VACUUM BREAKER VALVE, PRESSURE

CLASS 150 LB THREADED X FLANGE.

IN

SCALE : NTS

4" AIR RELEASE VALVE AND MANHOLE VAULT (IN STREET)

ELBOW MUST POINT

STRAIGHT DOWN

2 FT. NOMINAL

COVER 9 IN.

2 FT. NOMINAL

6 IN. ABOVE NATURAL GROUND

4" RESILIENT SEAT GATE VALVE

2 - 4" 45° MJ DIP BENDS

8" X 4" MJ X MJ DIP REDUCER

30" X 8" MJ X MJ DIP TEE

4" DISCHARGE LINE,

DUCTILE IRON PIPE

12 IN. MIN

ALL SIDES

IN

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FILL BOTTOM OF MANHOLE

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4" FLANGED 45° DIP BEND

4" MJ X FLANGED 45° DIP

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12 9

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4" DIP, ENCAPSULATED

IN POLYWRAP

WATER

30 IN.

IN

48 IN.

" M

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ENCLOSURE PER PLANS (SITE

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