Amendment_0003_0003.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1

1. CONTRACT ID CODE

I

PAGE OF PAGES

1 I 2

3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ. NO.

5. PROJECT NO. (If applicable)

08/09/2021 CODE R60 7. ADMINISTERED BY (If other than Item 6) CODE I

2. AMENDMENT/MODIFICATION NO.

6. ISSUED BY

Bureau of Reclamation

Missouri Basin Region

Regional Office

PO Box 36900 Billings MT

59107

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

9A. AMENDMENT OF SOLICITATION NO .

140R6021R0005

X

9B. DATED (SEE ITEM 11)

06/21/2021

10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

� The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers XDis extended. is not extended.

Offers 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 ____ copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted ; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT 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 letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment. and is received prior to the opening hour and dale specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

CHECK ONE 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 data, 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 Dis not Dis 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.)

GREEN MOUNTAIN POWERPLANT,PENSTOCK REHABILITATION

Colorado-Big Thompson Project, Colorado

See Attached for changes incorporated by this amendment.

Except as provided herein, all terms and conditions of the document referenced in Item 9 A or 1 0A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print) 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

Gerri Voto-Braun

15B. CONTRACTOR/OFFEROR 15C. DATE SIGNED

(Signature of person authorized to sign)

Previous edition unusable

16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

16C. DATE SIGNED

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

Solicitation No. 140R6021R0005 Amendment No. 0003

Description of Changes: The following changes are hereby incorporated into and made a part of this solicitation:

1) In Section A, remove the SF1442 in its entirety and substitute therefore the attached revised SF1442.

2) In section B remove Section 00 00 50- Price Schedule in its entirety and substitute therefore the attached revised Section 00 00 50- Price Schedule.

3) In section C remove Section 35 21 94 – Steel Piping in its entirety and substitute therefore the attached revised Section 35 21 94 – Steel Piping.

For convenience, essential changes on the revised solicitation pages are indicated by a vertical line in the margin where lines or paragraphs changed from the previous version. However, all portions of the revised solicitation pages shall apply whether changes thereon have or have not been indicated.

Receipt of Bids: The hour and date for receipt of offers has changed to 1300 (1:00 PM Local Time) on September 3, 2021.

Acknowledgement: See Block 11 above regarding how to acknowledge this amendment. The Government must receive the acknowledgement at the place designated for receipt of bids (See Block 10 of the Standard Form 1442).

Third Party: If you have given a copy of the solicitation to someone else, please forward this amendment accordingly.

A list of questions from prospective contractors are also included with this amendment and are provided for informational purposes only. Additional/Previous questions not yet answered will be addressed in a subsequent amendment.

(See ).

SOLICITATION, OFFER,

AND AWARD

(Construction, Alteration, or Repair) IMPORTANT - The "offer" section on the reverse must be fully completed by offeror.

9. FOR INFORMATION

CALL:

NOTE: In sealed bid solicitations "offer" and "offeror" mean "bid and "bidder".

SOLICITATION

1. SOLICITATION NUMBER

5. REQUISITION/PURCHASE REQUEST NUMBER

CODE

6. PROJECT NUMBER

8. ADDRESS OFFER TO

4. CONTRACT NUMBER

7. ISSUED BY

11. The contractor shall begin performance within

12a. THE CONTRACTOR MUST FURNISH ANY REQUIRED PERFORMANCE AND PAYMENT BONDS?

(If "YES", indicate within how many calendar days after award in Item 12b.)

13. ADDITIONAL SOLICITATION REQUIREMENTS:

a. Sealed offers in original and

b. An offer guarantee

c. All offers are subject to the (1) work requirements, and (2) other provisions and clauses incorporated in the solicitation in full text or by reference.

d. Offers providing less than

STANDARD FORM 1442 (REV. 8/2014)

Prescribed by GSA - FAR (48 CFR) 53.236-1(d) calendar days for Government acceptance after the date offers are due will not be considered and will be rejected.

is, is not required.

containing offers shall be marked to show the offeror's name and address, the solicitation number, and the date and time offers are due.

(date). If this is a sealed bid solicitation, offers will be publicly opened at that time. Sealed envelopes copies to perform the work required are due at the place specified in Item 8 by (hour) award, YES NO notice to proceed. This performance period is mandatory negotiable.

calendar days and complete it within calendar days after receiving

a. NAME b. TELEPHONE NUMBER (Include area code) (NO COLLECT CALLS)

12b. CALENDAR DAYS

2. TYPE OF SOLICITATION

SEALED BID (IFB)

NEGOTIATED (RFP)

3. DATE ISSUED PAGE OF PAGES

140R6021R0005

Bureau of Reclamation Missouri Basin Region Regional Office PO Box 36900 Billings MT 59107

10. THE GOVERNMENT REQUIRES PERFORMANCE OF THE WORK DESCRIBED IN THESE DOCUMENTS (Title, identifying number, date)

GREEN MOUNTAIN POWERPLANT PENSTOCK REHABILITATION,Colorado-Big Thompson Project, Colorado

The magnitude of this project is more than $10,000,000.

The North American Industry Classification System (NAICS)code is 238320 Painting and Wall Covering Contractors The Small Business Size Standard is $16.5 Million. Product or Service Descriptions - PSC:Z2KA Repair, Alternation and Maintenance of Dams.

This project is issued for Full and Open competition.

Proposals and Bid Guarantee will be received via email to: Linda Melnick lmelnick@usbr.gov

Taxpayer Identification Number: (TIN) _____________________________ Data Universal Number System (DUNS) ___________________________ Commercial and Government Entity Code: (SAM) ____________________

Bureau of Reclamation Missouri Basin Region Linda Melnick lmelnick@usbr.gov

0040502161 R60

Linda Melnick 406-247-7646

1 2 local time 09/03/2021

1 electronic

PARAGRAPH F.1

17. The offeror agrees to perform the work required at the prices specified below in strict accordance with the terms of this solicitation, if this offer is accepted calendar days after the date offers are due. (Insert any number equal to or greater than the minimum requirement by the Government in writing within stated in Item 13d. Failure to insert any number means the offeror accepts the minimum in Item 13d.)

OFFER (Must be fully completed by offeror)

AMOUNTS

18. The offeror agrees to furnish any required performance and payment bonds.

19. ACKNOWLEDGMENT OF AMENDMENTS

(The offeror acknowledges receipt of amendments to the solicitation -- give number and date of each)

AMENDMENT

NUMBER

DATE.

AWARD (To be completed by Government)

CONTRACTING OFFICER WILL COMPLETE ITEM 28 OR 29 AS APPLICABLE

14. NAME AND ADDRESS OF OFFEROR (Include ZIP Code)

CODE FACILITY CODE

15. TELEPHONE NUMBER (Include area code)

16. REMITTANCE ADDRESS (Include only if different than Item 14.)

20a. NAME AND TITLE OF PERSON AUTHORIZED TO SIGN OFFER (Type or print)

21. ITEMS ACCEPTED:

22. AMOUNT

26. ADMINISTERED BY

30a. NAME AND TITLE OF CONTRACTOR OR PERSON AUTHORIZED TO SIGN (Type or print)

31c. DATE

STANDARD FORM 1442 (REV. 8/2014) BACK

31b. UNITED STATES OF AMERICA

BY

31a. NAME OF CONTRACTING OFFICER (Type or print)

29. AWARD (Contractor is not required to sign this document.) Your offer on this solicitation is hereby accepted as to the items listed. This award consummates the contract, which consists of (a) the Government solicitation and your offer, and (b) this contract award. No further contractual document is necessary.

30b. SIGNATURE 30c. DATE

28. NEGOTIATED AGREEMENT (Contractor is required to sign this document and return and deliver all items or perform all work requirements identified on this form and any continuation sheets for the consideration stated in this contract. The rights and obligations of the parties to this contract shall be governed by (a) this contract award, (b) the solicitation, and (c) the clauses, representations, certifications, and specifications incorporated by reference in or attached to this contract.

copies to issuing office.) Contractor agrees to furnish

24. SUBMIT INVOICES TO ADDRESS SHOWN IN

(4 copies unless otherwise specified)

23. ACCOUNTING AND APPROPRIATION DATA

ITEM 25. OTHER THAN FULL AND OPEN COMPETITION PURSUANT TO

27. PAYMENT WILL BE MADE BY

10 U.S.C. 2304(c) ( ) 41 U.S.C. 3304(a) ( )

20b. SIGNATURE 20c. OFFER DATE

R60 Bureau of Reclamation - Missouri Basin Regional Office PO Box 36900 Billings MT 59107- 6900

The Invoicing Processing Platform (IPP) US Department of Treasury http://www.ipp.gov

Gerri Voto-Braun

Green Mountain Powerplant Penstock Rehabilitation Colorado-Big Thompson Project, Colorado Amendment No. 0003

Price Schedule Revised B - 1

CONTINUATION OF

SECTION B – SUPPLIES OR SERVICES AND PRICES/COSTS

GREEN MOUNTAIN POWERPLANT

PENSTOCK REHABILITATION

COLORADO-BIG THOMPSON PROJECT, COLORADO

B.1 PRICE SCHEDULE

(a) Offers will be considered for award on the following Price Schedule, but no offer will be considered for award on only a part of the Price Schedule.

(b) Offers are subject to the terms and conditions of this solicitation.

(c) Quantities in the Price Schedule are estimated quantities for comparison of offers only.

Except as provided in the contract clause at FAR 52.211-18, Variation in Estimated Quantity, no claim shall be made against the Government for overruns or underruns. The contract clause at FAR 52.211-18, Variation in Estimated Quantity does not apply to lump sum items.

(d) See the contract clause at WBR 1452.232-81, Payment for Mobilization and Preparatory Work, for CLIN 1.

(e) Definitions:

(1) CLIN – Contract Line Item Number.

PRICE SCHEDULE

CLIN Section Supplies or Services Quantity and Unit

Unit Price

Amount

1 WBR

1452.232 -81

Mobilization and Preparatory Work

For the lump sum of $

2 02 70 10 Removal and Control of Water for Unit 1 Penstock and Draft Tube Interior

For the lump sum of $

3 02 70 10 Removal and Control of Water for Unit 2 Penstock and Draft Tube Interior

For the lump sum of $

Colorado-Big Thompson Project, Colorado Amendment No. 003

Price Schedule Revised B - 2

PRICE SCHEDULE

CLIN Section Supplies or Services Quantity and Unit

Unit Price

Amount

4 02 70 10 Removal and Control of Water within Penstock Gallery

For the lump sum of $

5 03 81 10 Concrete Base Removal and Repair for Unit 1

For the lump sum of $

6 03 81 10 Concrete Base Removal and Repair for Unit 2

For the lump sum of $

7 03 81 10 Core Drilling Holes in Existing Concrete

28 ln ft $ $

8 05 50 00 Miscellaneous Metalwork For the lump sum of $

9 09 96 20 Blast and Recoat Exterior Coated Surfaces of Unit 1 and Unit 2 Penstock and Associated Metalwork

42,000 ft2 $ $

10 09 96 20 Blast and Recoat Exterior Surfaces of Unit 1 and Unit 2 Scroll Case and Draft Tube Man-Door

60 ft2 $ $

11 09 97 02 Blast and Recoat Interior Surfaces of Penstock and Outlet Tube, including Embedded Pipe Appurtenances for Unit 1

24,550 ft2

12 09 97 02 Blast and Recoat Interior Surfaces of Penstock and Outlet Tube, including Embedded Pipe Appurtenances for Unit 2

24,750 ft2 $ $

13 09 97 02 Blast and Recoat Interior Surfaces of Scroll Case for Unit 1

1,100 ft2 $ $

14 09 97 02 Blast and Recoat Interior Surfaces of Scroll Case for Unit 2

1,100 ft2 $ $

Revised B - 3

PRICE SCHEDULE

CLIN Section Supplies or Services Quantity and Unit

Unit Price

Amount

15 09 97 02 Spot Repair Turbine Runner for Unit 1

100 ft2

16 09 97 02 Spot Repair Turbine Runner for Unit 2

130 ft2 $ $

17 09 97 02 Blast and Recoat Draft Tube Steel Lining for Unit 1

155 ft2

18 09 97 02 Blast and Recoat Draft Tube Steel Lining for Unit 2

155 ft2 $ $

19 09 97 02 Blast and Recoat Draft Tube Pier Nose and Pier Grating for Unit 1

25 ft2

20 09 97 02 Blast and Recoat Draft Tube Pier Nose and Pier Grating for Unit 2

25 ft2 $ $

21 25 00 01 Control and Monitoring System

For the lump sum of $

22 26 05 02 Complete Electrical System For the lump sum of $

23 33 09 12 Install Ultrasonic Flowmeter for Unit 1

For the lump sum of $

24 33 09 12 Install Ultrasonic Flowmeter for Unit 2

For the lump sum of $

25 35 21 20 Test Coated Stoplogs For the lump sum of $

26 35 21 94 Remove and Dispose of Existing 14-Inch Steel Vent Piping for Unit 1

For the lump sum of $

27 35 21 94 Furnish and Install Lined and Coated 14-Inch Steel Vent Piping for Unit 1

235 ln ft $ $

28 35 21 94 Remove and Dispose of Existing 14-Inch Steel Vent Piping for Unit 2

For the lump sum of $

Revised B - 4

PRICE SCHEDULE

CLIN Section Supplies or Services Quantity and Unit

Unit Price

Amount

29 35 21 94 Furnish and Install Lined and Coated 14-Inch Steel Vent Piping for Unit 2

235 ln ft $ $

30 35 21 94 Remove and Dispose of Existing 3-Inch Steel Penstock Vent Piping

For the lump sum of $

31 35 21 94 Furnish and Install Lined and Coated 3-Inch Penstock Steel Vent Piping

234 ln ft $ $

32 35 21 94 Remove and Dispose of Existing 2-Inch Steel Conduit Piping

For the lump sum of $

33 35 21 94 Furnish, Coat, and Install Jet-Flow Gate Upstream Pipe Spools

For the lump sum of $

34 35 21 94 Furnish Steel Pipe for Air Valve Assembly and Drain Valves

For the lump sum of $

35 35 21 94 Pipe Freezing Isolation For the lump sum of $

36 35 21 94 Weld Repair of Interior Surfaces of Penstock, Outlet Tube, Scroll Case and Draft Tube for Unit 1, Exceeding 5/32-inch Deep and Less Than 3/8-inch Deep

6 lb $ $

37 35 21 94 Weld Repair of Interior Surfaces of Penstock, Outlet Tube, Scroll Case and Draft Tube for Unit 1, Exceeding 3/8-inch Deep

7 lb $ $

38 35 21 94 Weld Repair of Interior Surfaces of Penstock, Outlet Tube, Scroll Case and Draft Tube for Unit 2, Exceeding 5/32-inch Deep and Less Than 3/8-inch Deep

6 lb $ $

Revised B - 5

PRICE SCHEDULE

CLIN Section Supplies or Services Quantity and Unit

Unit Price

Amount

39 35 21 94 Weld Repair of Interior Surfaces of Penstock, Outlet Tube, Scroll Case and Draft Tube for Unit 2, Exceeding 3/8-inch Deep

7 lb $ $

40 35 21 96 Remove and Dispose of Existing Packing Material for Unit 1

For the lump sum of $

41 35 21 96 Furnish and Install Packing Material for Unit 1

For the lump sum of $

42 35 21 96 Remove and Dispose of Existing Packing Material for Unit 2

For the lump sum of $

43 35 21 96 Furnish and Install Packing Material for Unit 2

For the lump sum of $

44 35 22 14 Valves and Equipment For the lump sum of $

45 35 22 25 Remove and Dispose Existing Tube Valve for Unit 1

For the lump sum of $

46 35 22 25 Jet-Flow Gate for Unit 1 For the lump sum of $

47 35 22 25 Remove and Dispose Existing Tube Valve for Unit 2

For the lump sum of $

48 35 22 25 Jet-Flow Gate for Unit 2 For the lump sum of $

49 48 13 10 Vertical Francis Turbine Runner Repair for Unit 1

525 lb $ $

50 48 13 10 Vertical Francis Turbine Runner Repair for Unit 2

725 lb $ $

TOTAL FOR PRICE SCHEDULE $_________________

END OF SUPPLIES OR SERVICES AND PRICES/COSTS

Revised B - 6

This page intentionally left blank.

Steel Piping

Revised 35 21 94 - 1

SECTION 35 21 94

STEEL PIPING

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Remove and Dispose of Existing 14-Inch Steel Vent Piping for Unit 1:

1. Payment: Lump-sum price offered in the Price Schedule.

B. Furnish and Install Lined and Coated 14-Inch Steel Vent Piping for Unit 1:

1. Measurement: Length of new installed 14-inch steel vent piping for Unit 1.

2. Payment: Unit price offered in the Price Schedule.

a. Includes steel piping shown on Drawing 245-D-60061.

b. Includes pipe supports, fittings, braces, and anchors as shown on drawings.

C. Remove and Dispose of Existing 14-Inch Steel Vent Piping for Unit 2:

1. Payment: Lump-sum price offered in the Price Schedule.

D. Furnish and Install Lined and Coated 14-Inch Steel Vent Piping for Unit 2:

1. Measurement: Length of new installed 14-inch steel vent piping for Unit 2.

2. Payment: Unit price offered in the Price Schedule.

a. Includes steel piping shown on Drawing 245-D-60061.

b. Includes pipe supports, fittings, braces, and anchors as shown on drawings.

E. Remove and Dispose of Existing 3-Inch Steel Penstock Vent Piping:

1. Payment: Lump-sum price offered in the Price Schedule.

F. Furnish and Install Lined and Coated 3-Inch Penstock Steel Vent Piping:

1. Measurement: Length of installed 3-inch steel penstock vent piping.

2. Payment: Unit price offered in the Price Schedule.

a. Includes steel piping shown on Drawing 245-D-60060.

b. Includes pipe supports, fittings, braces, and anchors packing as shown on drawings.

G. Remove and Dispose of Existing 2-Inch Steel Conduit Piping:

1. Payment: Lump-sum price offered in the Price Schedule.

Revised 35 21 94 - 2

H. Furnish, Coat, and Install Jet-Flow Gate Upstream Pipe Spools:

1. Payment: Lump-sum price offered in the Price Schedule.

I. Furnish Steel Pipe for Air Valve Assembly and Drain Valves:

1. Payment: Lump-sum price offered in the Price Schedule.

J. Pipe Freezing Isolation:

1. Payment: Lump-sum price offered in the Price Schedule.

K. Weld Repair of Interior Surfaces of Penstock, Outlet Tube, Scroll Case and Draft Tube for Unit 1, Exceeding 5/32-inch Deep and Less Than 3/8-inch Deep:

1. Measurement: Weight in pounds of repair material used.

2. Payment: Unit price offered in the Price Schedule.

L. Weld Repair of Interior Surfaces of Penstock, Outlet Tube, Scroll Case and Draft Tube for Unit 1, Exceeding 3/8-inch Deep:

1. Measurement: Weight in pounds of repair material used.

2. Payment: Unit price offered in the Price Schedule.

M. Weld Repair of Interior Surfaces of Penstock, Outlet Tube, Scroll Case and Draft Tube for Unit 2, Exceeding 5/32-inch Deep and Less Than 3/8-inch Deep:

1. Measurement: Weight in pounds of repair material used.

2. Payment: Unit price offered in the Price Schedule.

N. Weld Repair of Interior Surfaces of Penstock, Outlet Tube, Scroll Case and Draft Tube for Unit 2, Exceeding 3/8-inch Deep:

1. Measurement: Weight in pounds of repair material used.

2. Payment: Unit price offered in the Price Schedule.

1.02 REFERENCE STANDARDS

A. American Society of Mechanical Engineers (ASME)

1. ASME B1.20.1-2013(R2018) Pipe Threads, General Purpose (Inch)

2. ASME B16.1-2015 Gray Iron Pipe Flanges and Flanged

Fittings: Classes 25, 125, and 250

3. ASME B16.21-2016 Nonmetallic Flat Gaskets for Pipe Flanges

4. ASME B16.3-2016 Malleable Iron Threaded Fittings: Classes

150 and 300

5. ASME B16.5-2017 Pipe Flanges and Flanged Fittings NPS 1/2

Through NPS 24 Metric/Inch Standard

Revised 35 21 94 - 3

6. ASME B16.9-2018 Factory-made Wrought Buttwelding Fittings

7. ASME B16.11-2016 Forged Fittings, Socket-Welding and

Threaded

8. ASME B46.1-2019 Surface Texture, Surface Roughness, Waviness and Lay

9. ASME Y14.36-2018 Surface Texture Symbols

10. ASME BPVC-VIII-1-2019 ASME Boiler and Pressure Vessel Code, Section VIII, Division 1: Rules of Construction of Pressure Vessels

11. ASME BPVC-IX-2019 ASME Boiler and Pressure Vessel Code, Section IX: Welding and Brazing Qualifications

12. ASME PCC-1-2019 Guidelines for Pressure Boundary Bolted Flange Joint Assembly

B. American Society for Nondestructive Testing (ASNT)

1. ASNT SNT-TC-1A-2020 Qualification of Nondestructive Testing

Personnel

C. ASTM International (ASTM)

1. ASTM A36/A36M-19 Carbon Structural Steel

2. ASTM A53/A53M-20 Pipe, Steel, Black and Hot-Dipped, Zinc-

Coated Welded and Seamless

3. ASTM A182/A182M-20 Forged or Rolled Alloy and Stainless Steel

Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service

4. ASTM A193/A193M-20 Alloy Steel And Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications

5. ASTM A283/A283M-18 Low and Intermediate Tensile Strength Carbon Steel Plates

6. ASTM A312/A312M-19 Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes

7. ASTM A1011/A1011M-18 Steel, Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low-Alloy, High- Strength Low-Alloy with Improved Formability, and Ultra-High Strength

8. ASTM E164-19 Contact Ultrasonic Testing of Weldments

9. ASTM E165/E165M-18 Standard Practice for Liquid Penetrant

Examination for General Industry

Revised 35 21 94 - 4

10. ASTM E709-15 Guide for Magnetic Particle Testing

D. American Welding Society (AWS)

1. AWS D1.1/D1.1M:2020 Structural Welding Code – Steel

2. AWS QC1-2007 Certification of Welding Inspectors

E. American Water Works Association (AWWA)

1. AWWA C200-17 Steel Water Pipe - 6 In (150 mm) and Larger

2. AWWA C206-17 Field Welding of Steel Water Pipe

3. AWWA C207-18 Steel Pipe Flanges for Waterworks Service -

Sizes 4 In. Through 144 In. (100 mm Through 3,600 mm)

4. AWWA C220-17 Stainless Steel Pipe 1/2 In. (13 mm) and Larger

F. Manufacturers Standardization Society of the Valve and Fittings Industry (MSS)

1. MSS SP-114-2018 Corrosion Resistant Pipe Fittings, Threaded and Socket Welding, Class 150 and 1000

1.03 DEFINITIONS

A. Pitting Corrosion:

1. Corrosion of a metal surface, confined to a point or small area, that forms cavities.

The shape may be hemispherical, cup shaped, or irregular. Pitting corrosion is typically localized but pits that are close together may join together over time and appear to be one large pit. Pits sizes typically are 1-inch or smaller in diameter and of varying depths.

2. Although not necessarily caused by pitting corrosion, the following items are to be considered as pitting corrosion regarding locating, measuring, weld repair, and other requirements in this Section:

a. Gouges and scratches whose depths meet the pit depths described in

Article 1.07 D.

1.04 SYSTEM DESCRIPTION

A. General:

1. The following miscellaneous information regarding the air vents is provided for the convenience of the Contractor. This information is not intended to be binding nor should the information be used without verification.

a. The 14-inch air vent and 3-inch air vents are pressurized to reservoir head, up to 107 pounds per square inch (psi).

Revised 35 21 94 - 5

b. Jet-flow gate upstream pipe spools are located near the jet flow gates.

Spools are designed for a maximum pressure of 170 psi.

B. Deleted.

1.05 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 – Submittals.

B. RSN 35 21 94-1, Qualifications:

1. Welders:

a. ASME Boiler and Pressure Vessel Code (BPVC), Section IX Qualifications.

1) QW-484A and QW-484B Forms.

2. Flange Designer:

a. Professional Engineer with a minimum of 3 years’ experience designing pipe flanges. Reference Section 01 33 00 – Submittals, paragraph 1.04 F 2 for definition of Professional Engineer.

3. Pitting Corrosion Weld Repair:

a. Welder Qualifications in accordance to AWS D.1.1 and AWS QC1.

b. Certified Weld Inspector certification and resume.

c. Welding Procedure Qualification Record (PQR).

d. Certified Welding Procedure Specifications (WPS).

C. RSN 35 21 94-2, Shop Drawings:

1. Checked, detailed shop drawings which include dimensions and tolerances, material data, joint details, welding requirements. Include drawings of air valve and drain valve assemblies.

2. When revised drawings and data are resubmitted, clearly identify changes from previous submittals.

3. Surface texture symbols for O-ring groove in accordance with ASME Y14.36M.

D. RSN 35 21 94-3, Installation Procedure:

1. Step-by-step procedure that details how the new air vents will be installed.

a. Removal and installation of current pipe taking in consideration space constraints in hoist house and gate chamber.

b. The method by which the line will be connected to the existing air vent and the plan of how to ensure a leak-free connection.

c. Plan for protection of ring-seal gates.

d. Include steel piping length segments.

Revised 35 21 94 - 6

E. RSN 35 21 94-4, Commercial Product Data:

1. Anchors.

2. Flange isolation kits.

3. Gaskets.

F. RSN 35 21 94-5, Custom Flange Calculations:

1. Custom flange for jet-flow gate upstream pipe spools.

a. Provide detailed flange calculations using ASME BPVC, Section VIII Division 1, Appendix 2.

b. Signed and sealed by Professional Engineer.

G. RSN 35 21 94-6, O-ring Commercial Product Data:

1. Material.

2. Size.

3. Fluid Compatibility.

4. Durometer.

5. Manufacturer demonstrating a minimum of 5 years designing and manufacturing

O-rings.

H. RSN 35 21 94-7, Pipe Freeze Isolation Procedure:

1. Company demonstrating a minimum of 10 years’ experience with pipe freezing isolation.

2. Freeze log form.

3. Diagram and assembly that includes location of freeze isolation jacket, temperature sensor, vents, and injection port.

4. Product data for freeze equipment:

a. Jacket, tanks, monitors, and hoses.

5. Methodology that includes the following:

a. Safety measures.

b. Installation of pipe freeze jackets and temperature monitors.

c. Method of monitoring of Oxygen (O2) and Liquid Nitrogen (LN2) levels.

d. Method of draining water from air vent.

e. Method of maintaining freeze to setpoint until valve removal and installation is complete.

f. Examination verifying pipe is properly frozen.

g. Anticipated freezing time.

Revised 35 21 94 - 7

I. RSN 35 21 94-8, Government Inspection Notification Letter for Hydrostatic Pressure Testing:

1. Provide COR minimum of 28 days’ notice before a witnessed testing date at locations in the United States of America and 56 days’ notice before a witnessed testing date at locations outside of the United States of America. Include in notification letter a description of the testing that will be performed, date and time of testing, and physical address of the testing facility.

J. RSN 35 21 94-9, Field Inspection Plan:

1. Provide methodology and list of equipment used to measure pitting corrosion of steel penstocks, outlet tubes, scroll cases, and draft tubes.

K. RSN 35 21 94-10, Field Inspection Report and Repair Plan:

1. Provide field inspection data results indicating extent of pitting corrosion of steel penstocks, outlet tubes, scroll cases, and draft tubes.

2. Provide detailed procedure for repair of steel penstocks, outlet tubes, scroll cases, and draft tubes.

a. Indicate areas where steel will be weld repaired.

b. Verify weld repair material and welding procedures are compatible with the steel base material being repaired.

3. Detailed weld repair plan.

a. Proposed sequencing and special techniques for weld repair methods utilized. Include control of steel wall temperature stress during repairs.

L. RSN 35 21 94-11, Final Data:

1. Completed field test reports, include:

a. Weld repair locations and dimensions.

b. Photos showing typical repairs.

c. Method of testing.

2. Weld tests, including re-examination of repaired welds, on each weld joint for the following tests, as applicable:

a. Visual Testing (VT).

b. Ultrasonic Testing (UT)

1.06 DELIVERY, STORAGE, AND HANDLING

A. Transport and handle in accordance with fabricator’s instructions.

B. Prevent damage during loading, transporting, unloading, and at final storage location.

1. Provide padded bolsters curved to fit under the outside of the piping.

Revised 35 21 94 - 8

2. Provide padding under ties during transportation and storage.

C. Do not store directly on the ground.

D. Store so that lifting straps can be passed beneath pipe sections.

E. Provide space to allow personnel to move between pipe sections.

1.07 DELETED

1.08 QUALIFICATIONS

A. Pitting Corrosion Weld Repair:

1. Certified Welding Inspector (CWI):

a. In accordance with AWS QC1, with knowledge of the appropriate welding code for the work.

b. Minimum of 5-years of professional experience related to welding inspection.

2. Field Welder/Welder Operator:

a. Qualified by testing in accordance with AWS D1.1 for field welds.

3. Non-destructive Test (NDT) Quality Control Personnel:

a. In accordance with requirements of ASNT Recommended Practice No.

SNT-TC-1A, Level II.

b. Minimum of 5-years of professional experience related to welding inspection similar to the work.

PART 2 PRODUCTS

2.01 EQUIPMENT

A. Steel Plate:

1. ASTM A36, ASTM A283 grade D or ASTM A1011 grade 36.

B. Standard and Schedule Steel Pipe:

1. In accordance with ASTM A53, grade B.

2. Pipe 4-inches in diameter and smaller: Galvanized.

3. Pipe larger than 4-inches in diameter: Black.

C. Stainless Steel Pipe:

1. AWWA C220 and ASTM A312, Type 304L or Type 316L.

2. Hydrostatically test pipe in accordance with ASTM 312.

Revised 35 21 94 - 9

D. Flanges:

1. ASME B16.5, AWWA C207 or ASME B16.1 according to drawing. Raised faced or flat faced according to drawings. Field verify facing of existing flanges and match facing to existing flanges.

2. Upstream pipe spool.

a. Downstream flange.

1) Slip-on ring type, flat faced: AWWA C207.

b. 50-inch custom flange.

1) ASME BPVC VIII, Division 1, Appendix 2.

c. Surface texture for O-ring groove in accordance with ASME B46.1.

E. Flange Gaskets:

1. AWWA Upstream Pipe Spool:

a. Model No. 22, manufactured by Garlock Sealing Technologies, www.garlock.com; or equal, having the following essential characteristics:

1) AWWA C207.

2) Suitable for a minimum of 170 psi working pressure cold water service.

2. ASME Flanges:

a. Model Figure R, manufactured by FNW; or equal, having the following essential characteristics:

1) ASME B16.21 or ASME B16.5.

2) Suitable for cold water service.

3) Gasket material: Styrene-butadiene rubber (SBR).

4) Suitable for a minimum of 170 psi working pressure cold water service.

F. Flange Bolts and Studs:

1. AWWA C207 for AWWA flanges.

2. ASME B16.5.

G. Threaded Steel Fittings:

1. ASME B16.11, Class 3000.

2. Galvanized.

3. Paint in accordance to Tabulation 2 of Section 09 96 20 - Coatings.

H. Threaded Stainless Steel Fittings:

Revised 35 21 94 - 10

1. ASME B16.11 Class 3000 or MSS SP-114, Class 150.

2. ASTM A182, type 304 or 316.

I. Butt-welding Steel Fittings:

1. ASME B16.9.

J. Threaded Malleable Iron Fittings:

1. ASME B16.3, Class 150.

2. Galvanized

3. Paint in accordance to Tabulation 2 of Section 09 96 20 - Coatings.

K. Threaded Pipe Connections:

1. ASME B1.20.1.

L. Isolation Kits:

1. Linebacker 61 as manufactured by GPT an EnPro Industries Company, www.gptindustries.com; or equal, with the following salient characteristics:

a. Provide type E or F gaskets.

1) Field verify existing flange facing. Use type E for full-faced flanges and Type F for raised face flanges.

2) Use flange manufacturers’ recommended type for new flanges.

b. Provide retainer with integral Nitrile sealing element.

c. One insulating sleeve and two insulating washers for each bolt.

d. Asbestos gaskets are not acceptable.

e. To prevent damage to the gasket, the gasket supplier to provide the required bolt torques, recommended bolt tightening sequence, and flange face finish for the insulating flanged joints.

f. Match the pressure class rating of the mating flanges.

2. Threaded Connections

a. Model 3132 as manufactured by Hart Industrial Unions, www.hartindustries.com; or equal, with the following essential characteristics:

1) Class 3000.

2) O-ring isolation.

3) Leak-proof.

4) Threads per ASME B1.20.1.

5) Ends: Female x male.

Revised 35 21 94 - 11

6) Epoxy-coated steel and steel combination for 3-inch pipe.

7) Steel and stainless steel combination for 1-inch pipe.

M. Anchor Bolts:

1. Anchor bolts with studs and epoxy as shown on the drawings.

a. Threaded rod or threaded fasteners: ASTM A193, B7.

b. Studs with injection adhesive or capsule adhesive:

1) A7 Acrylic adhesive as manufactured by ITW Red Head, http://www.itwredhead.com; HVA Adhesive Anchor System or “HIT HY-200” manufactured by Hilti, www.hilti.com; or equal.

2) The stud and epoxy combination to be furnished by the same manufacturer.

N. Pipe Support:

1. Galvanized: ASTM A36, ASTM A283 grade D or ASTM A1011 grade 36.

O. Custom Flange O-Ring

1. Having the following essential characteristics:

a. O-ring manufacturer shall be in the business of designing and manufacturing O-rings for a minimum of 5 years.

b. 1/2-inch diameter.

c. Nitrile.

d. Durometer: Shore A, 50.

e. Suitable for 170 psi cold water service.

2.02 MATERIALS

A. Pitting Corrosion Weld Repair:

1. Arc-Welding Electrodes:

a. Filler metal and required shielding gases or fluxes: AWS D1.1.

b. Filler metal for steel, minimum yield strength: AWS D1.1.

2.03 FABRICATION

A. Fabricate steel piping in accordance with these specifications, as indicated on drawings, and in accordance with AWWA C200.

B. All Longitudinal, Girth, and Spiral Joints, Other Than Field Welds:

1. Double-welded butt joints with complete penetration.

2. Stagger longitudinal joints.

Revised 35 21 94 - 12

3. Longitudinal, girth, and spiral joints shall not intersect at outlet connections.

C. Cut plates accurately to size and shape.

D. Bend or roll plates to true circular with curvature continuous from the edges of the plates.

E. Properly form edges to be joined by welding to suit type of welding and to allow complete penetration.

F. Tolerances, Inside Surface of the Pipe:

1. Inside surface of pipe: It shall not be possible to insert at any point a feeler gauge greater than 3/8-inch thickness between a template made to the nominal curvature of the inside surface extending over an arc of 30 degrees and the inside surface of the pipe.

2. Ends of straight pipe sections shall lie in a plane normal to the longitudinal axis of the section with a maximum deviation of 1/8-inch on either side of the plane.

G. Perform welding with a process that protects the molten metal from the atmosphere.

1. Where practicable, use automatic machines.

2. Where weld metal is deposited in successive layers, clean each layer thoroughly before the subsequent layer is deposited.

3. Take particular care in aligning and separating edges of plates to be joined by butt welding so that complete penetration and fusion of the welds will be ensured.

4. After welding is complete, remove weld spatter.

H. Flanges and Flanged Connections:

1. During the attachment of all flanges to their associated steel pipe, take adequate steps to ensure that the face of the flanges remains flat and perpendicular to the centerline of the attached piping.

2. Limit any and all irregularities or warping in the face of all flanges to 0.0015 of an inch measured from:

a. A high point on the face of the flange at an inside diameter to a corresponding low point on the face of the flange at an outside diameter, along any radial line, (concave orientation of the flange is not permissible) and

b. A high point on the face of the flange along a circumferential line at the centerline of the flange bolt holes, to a low point on the face of the flange along the same circumferential line, within a distance equal to the circumferential distance between every third bolt hole.

3. Remove by machining, all initial, residual, or latent irregularities or warping that remains in the face of the flange after its attachment to the steel.

Revised 35 21 94 - 13

4. After machining, the flange thickness shall not be reduced below the minimum thickness specified in AWWA C207, ASME B16.5, ASME B16.1, ASME BPVC custom flange calculations or as shown on drawings.

5. Weld all pipe flanges to the piping so that the bolt holes straddle the vertical centerline when in the installed position.

6. Provide all pipe flanges that connect to valve body flanges with the same number of bolt holes, bolt pattern, and bolt circle diameter as the valves with which they are connected.

I. Maintain the circularity of pipe sections during coating, lining, transporting, and installing operations.

1. Provide stulls or adjustable spiders.

2. Measured deviation between the maximum and minimum diameters at stulls or spiders shall not exceed 0.5 percent of nominal pipe diameter.

J. Continuously weld joints of flange supports and pipe supports.

K. Hydrostatic Pressure Testing:

1. Notify COR minimum of 2 weeks notice before a witnessed testing date at locations in the United States of America and 8 weeks notice before a witnessed testing date at locations outside of the United States of America.

2. The Government will witness hydrostatic test and calibration of pressure gauges, unless otherwise directed.

3. Use two or more pressure gauges with one being a recording type.

a. Upper limit of pressure gauges shall be between 1.5 and 3 times required test pressure. Calibrate pressure gauges with a deadweight tester.

b. Make a time-pressure record of hydrostatic pressure test.

4. Hydrostatic testing pressure:

a. Air vents piping: 160 psig.

b. Upstream pipe spool: 255 psig.

5. Furnish all temporary supports, bulkheads, air vents, dead weight tester, and other equipment necessary to perform the hydrostatic tests.

6. If a flange is attached to a piping section after the piping section has been hydrostatically tested, the piping section will not require retesting.

7. Water temperature for the tests: Greater than 45 degrees Fahrenheit.

8. Vent air from test sections.

9. Fill each section with water and uniformly increase the pressure until the required test pressure is reached.

a. Hold the test pressure for a minimum of fifteen (15) minutes

Revised 35 21 94 - 14

b. Apply and release test pressure three successive times.

c. After each application, hold pressure to two-thirds of required pressure until welded joints and seams can be examined.

d. Repair defects. After defects are repaired repeat the complete test procedure.

10. After hydrostatic tests are completed, cut any sections for handling purposes on planes normal to the pipe axis.

PART 3 EXECUTION

3.01 REMOVAL AND INSPECTION

A. Remove the following steel piping:

1. Existing 14-inch air vents in between flange at elevation 7721.33 (bottom of gate chamber floor) and flange at elevation 7955.75.

2. Existing 3-inch air vent piping between elevation 7723.85 and elevation 7958.5.

3. Abandoned 2-inch pipe located in gate chamber. See Section B-B and Note H on Drawing 245-D-60048. Condition of pipe is unknown, refer to Section 02 83 20 - Removal and Disposal of Coatings and Equipment With Coatings Containing Hazardous Materials.

B. Ensure that 14-inch and 3-inch lines are properly isolated prior to removal.

1. Isolate 3-inch line using submitted and approved pipe freezing procedure.

a. Safety Notes: Protective clothing must be worn at all times when performing pipe freezing. Proper ventilation is required.

b. Pipe freezing shall be performed via a controlled system that uses liquid nitrogen as the cryogenic fluid.

c. A fluid tight metallic jacket must be used.

d. The formed inline ice plug must be able to withstand a minimum of 170 psi cold water when considered controlled.

e. No leakage will be allowed when ice plug is considered to be controlled.

f. Monitor the entire pipe freezing system, the liquid nitrogen levels, and temperature at all times when pipe freezing is performed.

2. Isolate 14-inch air vent by unwatering the penstock in accordance with Section

02 70 10 - Removal and Control of Water.

C. Remove sections of 14-inch air vents (two each), 3-inch air vents (one each) and abandoned 2-inch conduit (one each) in gate chamber as shown on drawings and dispose in accordance with Section 02 83 20 - Removal and Disposal of Coatings and Equipment with Coatings Containing Hazardous Materials.

Revised 35 21 94 - 15

D. Inspect and clean the existing connections of the 14-inch flanges and 3-inch gate valve to which the air vent lines will be connected. Determine if a leak free connection can be made.

E. Provide a suitable flange or threaded connection at the end of the new air vent lines for connection to the existing 14-inch flange or new 3-inch gate valve.

3.02 PENSTOCK INSPECTION

A. Field Inspection:

1. Following initial coating removal, the Contractor and COR shall inspect any pitting corrosion in the penstocks, outlet tubes, scroll cases, and draft tubes.

2. Methodology and equipment used to measure pitting corrosion shall be in accordance with approved inspection plan.

3. Inspect areas of pitting along the interior surfaces of the penstocks, outlet tubes, scroll cases, and draft tubes.

4. Record pit depths. Mark off all areas where pit depths exceed the maximum allowable pit depths.

5. The Contractor shall repair the areas identified and agreed upon by the Contractor and the COR or on-site Government Representative.

3.03 PITTING CORROSION REPAIR

A. Pit Repair Performance Requirements:

1. Weld repair pitting corrosion on interior surfaces of penstocks, outlet pipes, scroll cases and draft tubes.

a. Exclude the following for weld repair of pitting corrosion:

1) Speed ring and associated stay vanes (see Drawing 154628).

2) Top of draft tube liner and sections identified in Section 48 13 10

– Vertical Francis Turbine Runner Repair.

2. Weld repair material and welding procedures shall be compatible with the steel base material being repaired.

3. Material of penstocks, outlet tubes, scroll cases, and draft tubes: Steel plate.

4. Include weld repair of gouges and scratches.

5. All pit repair shall be weld repaired to return pipe wall thickness to original thickness.

6. Corrosion with pitting depths exceeding the following depths for penstock sections, outlet tubes, scroll cases, and draft tubes shall be repaired:

a. 102-inch inner diameter (I.D.) x 11/16-inch wall thickness exposed penstock: 1/4-inch pit depth.

Colorado-Big Thompson Project, Colorado Amendment No. 003

Steel Piping Revised 35 21 94 - 16

b. 102-inch I.D. x 3/4-inch wall thickness exposed penstock: 1/4-inch pit depth.

c. 102-inch I.D. x 13/16-inch wall thickness exposed penstock: 5/16-inch pit depth.

d. 102-inch I.D. x 7/8-inch wall thickness exposed penstock: 3/8-inch pit depth. Where adjacent to concrete encased pipe, this requirement shall extend 10 feet into the concrete encasement.

e. 102-inch I.D. x 15/16-inch wall thickness exposed penstock: 1/2-inch pit depth.

f. 102-inch I.D. x 1-inch wall thickness exposed penstock: 9/16-inch pit depth.

g. 102-inch I.D. x 7/8-inch wall thickness concrete encased penstock including 102-inch x 84-inch reducer: 1/2-inch pit depth.

h. 84-inch I.D. x 11/16-inch wall thickness exposed penstock: 5/16-inch pit depth.

i. 50-inch I.D. x 1/2-inch wall thickness exposed and concrete encased outlet pipe: 1/4-inch pit depth.

j. Scroll case: 5/32-inch pit depth.

k. Draft tube: 3/16-inch pit depth.

B. Welding Repair:

1. Weld repair penstocks, outlet tubes, scroll cases, and draft tubes in accordance with the approved repair plan.

2. Contractor shall prepare corroded surfaces prior to weld repair by removing rust and coatings.

a. Clean existing steel surfaces to join welding material in accordance with

AWS D1.1.

3. Weld repair pitted areas of the interior surfaces of the penstocks, outlet tubes, scroll cases, and draft tubes.

a. Pre-heat welding area as necessary.

4. Grind and smooth weld repair to be within +1/8-inch, -0-inch of original surface of the penstock.

a. Final surface of the weld repair shall be prepared for coating in accordance with Section 09 97 02 – Impacted Immersion Coatings.

5. Perform field testing of the weld repairs in accordance with:

a. AWS D1.1 - Structural Welding Code – Steel.

C. Field Quality Testing:

Revised 35 21 94 - 17

1. The Certified Welding Inspector is responsible for monitoring and inspecting field welding of the penstocks, outlet tubes, scroll cases and draft tubes in accordance with AWS D1.1, and these paragraphs.

a. Monitor conformance to approved WPS, Nondestructive testing (NDT) procedure specifications, and PQR.

b. Visually inspect 100-percent before, during, and after welding.

c. Supervise NDT personnel and evaluate results.

d. Maintain records and prepare report confirming results of inspection and testing.

2. Nondestructive testing (NDT) of field welds:

a. Test 100-percent of welds in accordance with AWWA C206 and this paragraph.

b. Complete inspections and tests as work progresses in presence of COR and in accordance with AWS D1.1.

c. When welds are found to be defective by the standards of AWS, repair welds in accordance with AWS D1.1 and re-examine welds to ensure the adequacy of repairs.

d. Visual inspection (VT): Visually inspect welds following procedures, techniques, and standards of AWS D1.1.

e. Ultrasonic testing (UT): Ultrasonically test welds following procedures, techniques, and standards of ASTM E164.

3.04 INSTALLATION

A. Furnish and install steel piping in accordance with the requirements of these specifications and drawings for the following installations:

1. 4-inch air valve assembly and assemblies related to drain valves as shown on drawings.

2. 14-inch air vents for Unit 1 and Unit 2. Connect to existing piping at elevations

7721.33 and 7955.75.

3. 3-inch air vent and connect to existing piping at elevations 7723.85 and 7958.5.

4. Two jet-flow gate upstream pipe spools.

B. Details of the steel piping are shown on the following Drawings:

1. 245-D-60060 through 245-D-60064.

C. Install the steel piping as shown on drawings. Install air vent piping in accordance with approved installation procedure.

1. Provide necessary pipe supports and support brackets as needed during installation.

Revised 35 21 94 - 18

2. Assemble flanges according to ASME PCC-1 guidelines.

D. Field Joints:

1. In accordance with AWWA C206.

2. The Contractor may add field joints to facilitate installation of the piping. These are subject to Government approval.

3. Allowable Field Joints:

a. Threaded couplings for pipe less than 4 inches in diameter.

b. Flanged for pipe 4 inches and larger in diameter, inclusive. Flanges shall be suitable for the working pressure of the adjacent pipe.

c. Full penetration butt-welds.

4. Nondestructive Testing of Field Welds:

a. Test all welds in accordance with AWWA C206 and this paragraph.

b. Complete inspections and tests as work progresses in presence of COR and in accordance with AWS D1.1.

c. Visual inspection: Visually inspect all welds following procedures, techniques, and standards of AWS D1.1.

d. Testing of full penetration butt welded field joints:

1) Ultrasonic or radiograph methods in accordance with AWS D1.1.

e. Testing of partial penetration joint field welds and fillet welds by magnetic particle or dye penetrant.

1) Technique and procedure for magnetic particle testing: ASTM

E709.

2) Technique and procedure for dye penetrant: ASTM E165.

3) Standards of acceptance for magnetic particle and dye penetrant:

AWS D1.1.

f. When welds are found to be defective by the standards of AWS, repair welds in accordance with AWS D1.1 and reexamine welds to ensure adequacy of repairs.

E. Install pipe spools with flanged connections so that the bolt holes straddle the vertical centerline when in the installed position.

F. Install anchor bolts in accordance with manufacturer’s instructions.

G. Leak Test for Piping Associated with Valves:

1. In accordance and in conjunction with Gate Valve Wet Test of Section 35 22 14 -

Valves and Equipment.

Revised 35 21 94 - 19

2. No piping leakage is allowed. Make any required changes or adjustments until piping is approved by COR.

3.05 COATING

A. Coat steel piping in accordance with Section 09 96 20 – Coatings and Section 09 97 02 – Impacted Immersion Coatings.

3.06 DISPOSAL

A. Dispose of removed equipment and materials in accordance with Section 01 74 00 – Cleaning and Waste Management and Section 02 83 20 - Removal and Disposal of Coatings and Equipment with Coatings Containing Hazardous Materials.

END OF SECTION

Colorado-Big Thompson Project, Colorado Amendment No. 003

Steel Piping Revised 35 21 94 - 20

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Green Mountain Penstock Amendment 0003 Questions and Answers

25. Was the previous contract cancelled due wholly or in part to any means and methods that were proposed by the contractor or any of its subcontractors to accomplish any of the contract work? This is very relevant information that should be shared with all prospective bidders and their prospective subcontractors. If it was determined after award of the previous contract that using any means and methods to accomplish the work would not be acceptable to the government, the parties involved will have superior knowledge to all other bidders and will have a substantial competitive advantage over any contractor that submits a proposal without that information. We contend that all prospective bidders should be made aware of any proposed means and methods that had any bearing on the government’s decision to cancel the previous contract prior to drafting their technical proposals for consideration.

A: No. The previous contract was cancelled for the convenience of the Government due to significant technical changes prior to contractor mobilization.

26. Is the previous contractor or any of its subcontractors in possession of any engineered systems, equipment, materials or supplies that were paid for by the government on the previous contract that was cancelled? Specifically, who is in possession of the walkways, ladders and stairways that were fabricated, delivered and paid for by the government on the last contract?