B.08.03 Amendment 0008 W912EF22R0015 McNary DUE System Rehab.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

The purpose of this amendment is to incorporate the changes outlined below .

1. CONTRACT ID CODE PAGE OF PAGES

1 4

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

16C. DATE SIGNED

BY 17-Oct-2022

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 W912EF22R0015

X 9B. DATED (SEE ITEM 11)

18-Aug-2022

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

17-Oct-2022

CODE

USAED, WALLA WALLA - CONTRACTING DIV.

DAVID C BOONE 201 N. THIRD AVENUE

WALLA WALLA WA 99362-1876

W912EF 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912EF22R0015

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION SF 30 - BLOCK 14 CONTINUATION PAGE (SF 30)

The following have been added by full text:

AMENDMENT 0008

Summary of changes for Amend - 0008 McNary Powerhouse Drainage, Unwatering, and Equalization System Rehabilitation

1. Revised the following Specifications (See revised specification for details):

a. SECTION 01 14 00.20 28 WORK AND OPERATIONAL RESTRICTIONS Revised Paragraph 1.1 WORK PHASE REQUIREMENTS.

Revised Paragraph 1.2 GENERAL REQUIREMENTS.

Revised Paragraph 1.3 PHASE 1 - DRAINAGE SYSTEM AND MAIN TURBINE UNIT

VALVE UPGRADES.

Renamed and Revised Paragraph 1.5 PHASE 3 - STATION SERVICE TURBINE UNIT

VALVE UPGRADES AND MAIN TURBINE UNIT VALVE UPGRADES.

Revised Paragraph 1.6 MAIN UNIT OUTAGE REQUIREMENTS.

Revised Paragraph 1.7 STATION SERVICE UNIT OUTAGE REQUIREMENTS.

2. Revised the following Clauses:

See Yellow Highlights

SECTION 00 70 00 - CONDITIONS OF THE CONTRACT

The following have been modified:

52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK (APR 1984)

The Contractor shall be required to

(a) Commence work under this contract within 10 calendar days after the date the Contractor receives the notice to proceed,

(b) Prosecute the work diligently, and

(c) Complete the entire work ready for use not later than the dates listed below:

ADULT FISH PASSAGE WORK WINDOW: 1 January through 28/29 February, annually.

Project annual maintenance on McNary Fishladders occurs during the Adult Fish Passage Work Window.

One fishladder at a time will be removed from service during the work window: each for one month, typical. Anticipated Fishladders outage periods are as follows:

o Washington Fishladder outages: January 2023, February 2024.

o Oregon Fishladder outages: February 2023, January 2024.

See SECTION 01 14 00.20 28 WORK AND OPERATIONAL RESTRICTIONS for additional information and required work for each Work Phase below.

(1) The Contractor shall complete all work for the Drainage, Unwatering, and Equalization System Rehabilitation by not later than the dates listed below.

(2) Work on this contract is phased and must be completed in the specified order and within the specified time. All required work must be completed within the specified Phase, fully operational, and commissioned prior to beginning work on the next Phase, unless approved otherwise, in writing, by the Contracting Officer.

a. Phase 1 – Drainage System and Main Turbine Unit Valve Upgrades.

b. Phase 2 – Unwatering System Upgrades.

c. Phase 3 – Station Service Turbine Unit Valve Upgrades and Main Turbine Unit Valve Upgrades.

d. NOTE: Work on Main Turbine Unit Valve Upgrades will not be allowed during Phase 2.

e. The Contractor shall complete all work for Phase 1 and Phase 2, including commissioning, by not later than

30 April 2024.

f. The Contractor shall complete all work for Phase 3, including commissioning, by not later than 31 October

2024.

(3) All work for the Unwatering System Isolation Valve Replacement (including the 90 degree bend immediately downstream of the valve) must occur during the Adult Fish Passage Work Window 2024. Coordinate Contractor work window dates with the Contracting Officer a minimum of 120 calendar days prior to start of the Adult Fish Passage Work Window 2024. Assume the following:

a. 7 calendar day Contractor work window.

b. Contractor work window timeframe will be coordinated to allow Project annual maintenance on the Washington and Oregon Fishladders, as well as all Contractor work (including all diving) required for the Isolation Valve Replacement.

(4) Government support is limited between 20 December and 2 January, annually. No additional Main Turbine Units will be removed from service, or returned to service, during this time unless approved in writing by the Contracting Officer.

(5) The Contractor shall complete final cleanup and demobilization by not later than 15 calendar days after completion of work in (2)f. above.

(6) The Contractor shall complete the final, approved submission of the following by not later than 30 calendar days after completion of work in (2)f. above. See SECTION 01 78 00.00 28 CLOSEOUT SUBMITTALS for additional information:

a. O&M manuals.

b. As-Built drawings.

c. Shop Drawings.

d. Record Drawings.

e. Spare Parts submission.

(End of Clause)

52.211-12 LIQUIDATED DAMAGES--CONSTRUCTION (SEP 2000)

(a) If the Contractor fails to complete the work within the time specified in subparagraph (c)(2)f in the contract clause 52.211-10, Commencement, Persecution and Completion of Work, the Contractor shall pay liquidated damages to the Government in the amount of $2,967.00 for each calendar day of delay until the work is completed or accepted.

(b) If the Government terminates the Contractor's right to proceed, liquidated damages will continue to accrue until the work is completed. These liquidated damages are in addition to excess costs of repurchase under the Termination clause.

(End of clause)

(End of Summary of Changes)

MNA Powerhouse Drainage_Unwatering_Equalization System Rehab W912EF22R0015 Amend-0008

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 14 00.20 28

WORK AND OPERATIONAL RESTRICTIONS

PART 1 GENERAL

1.1 WORK PHASE REQUIREMENTS

1.1.1 Remaining Contract Work

1.2 GENERAL REQUIREMENTS

1.2.1 Coordination for Adult Fish Passage Impacts

1.3 PHASE 1 - DRAINAGE SYSTEM AND MAIN TURBINE UNIT VALVE UPGRADES

1.3.1 Phase 1 Work Sequencing Requirements

1.3.2 Phase 1 Work Restrictions

1.4 PHASE 2 - UNWATERING SYSTEM UPGRADES

1.4.1 Phase 2 Work Sequencing Requirements

1.4.2 Phase 2 Work Restrictions

1.5 PHASE 3 - STATION SERVICE TURBINE UNIT VALVE UPGRADES AND MAIN

TURBINE UNIT VALVE UPGRADES

1.6 MAIN UNIT OUTAGE REQUIREMENTS

1.6.1 Main Unit Outage Scheduling

1.7 STATION SERVICE UNIT OUTAGE REQUIREMENTS

1.7.1 Station Service Unit Outage Scheduling

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION (Not Used)

-- End of Section Table of Contents --

SECTION 01 14 00.20 28

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THIS PAGE INTENTIONALLY LEFT BLANK

SECTION 01 14 00.20 28

SECTION 01 14 00.20 28

WORK AND OPERATIONAL RESTRICTIONS

PART 1 GENERAL

This SECTION contains Work Restriction requirements and information. If conflicts are found between this SECTION and other areas of the Plans and Specifications, notify the Contracting Officer (KO).

NOTE:

a. Due t o bl ockage i n t he Dr ai nage header ( bet ween Mai n Uni t s 7 and

8) , Dr af t Tube Dr ai n Val ve pi t s f or Mai n Tur bi ne Uni t s ( Mai n Uni t s) 7- 14 ar e cur r ent l y f l ooded and not avai l abl e f or Cont r act or access.

Bl ockage i n t he Dr ai nage Header must be r emoved pr i or t o access t o t hese ar eas. See SECTION 33 01 30.16 28 DRAINAGE HEADER DEBRIS REMOVAL for additional information.

b. A maxi mum of t wo ( 2) Mai n Uni t s wi l l be r emoved f r om ser vi ce f or Mai n Uni t Dr ai nage and Equal i zer Val ve upgr ades, pr i or t o Dr ai nage Header bl ockage r emoval . Bl ockage must be compl et el y r emoved bef or e addi t i onal Mai n Uni t s wi l l be r emoved f r om ser vi ce, f or wor k on t hi s contract.

c. See Sheet M- 901 for Unwatering Pump Isometric. Includes overall configuration of Unwatering and Drainage System piping and pumps.

d. See Sheet M- 601 for Powerhouse Valve Schedule.

1.1 WORK PHASE REQUIREMENTS

Work on this Contract shall be complete, as specified and required, in the identified Phases. See Contracting Clause 52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK, for additional information.

a. Phase 1 - Drainage System and Main Turbine Unit Valve Upgrades.

b. Phase 2 - Unwatering System Upgrades.

c. Phase 3 - Station Service Turbine Unit Valve Upgrades and Main Turbine Unit Valve Upgrades .

1.1.1 Remaining Contract Work

All work not associated with a specific time period or work phase, shall be scheduled by the Contractor and included in the accepted Project Schedule. See SECTION 01 32 01.00 28 PROJECT SCHEDULE for additional information.

1.2 GENERAL REQUIREMENTS

The following requirements apply to all work on this Contract:

a. Prior to removing any of the following from service, all valves, parts, equipment, etc. required to upgrade and return each component

SECTION 01 14 00.20 28

to service, must be on-site and accepted for installation by the Contracting Officer (KO):

1. Main Turbine Units (Phase 1 and Phase 3 ).

2. Station Service Turbine Units (Phase 3).

3. All or part of the Drainage pump system, including intake and discharge piping, and valves (Phase 1).

4. All or part of the Unwatering pump system, including intake and discharge piping, and valves (Phases 1 and 2).

b. The following restrictions apply to work on, and/or use of, upgraded Fishway Drain Flush Line Piping:

1. Required piping upgrades shall occur outside of the Adult Fish Passage Work Window (Phase 1).

2. Fishway Drain Flush Line Piping upgrades must be complete prior to use for routing of Unwatering and/or Drainage Sump discharge flows.

3. Restrictions apply to routing of Unwatering and/or Drainage Sump discharge flows through upgraded Fishway Drain Flush Line Piping. See paragraph "Phase 2 Work Restrictions" for additional information.

c. A minimum of two (2) Unwatering Pumps must be operational at all times.

d. Contractor access to and/or work in the Drainage Sump is restricted to the Phase 1 timeframe. Contractor access to and/or work in the Unwatering Sump is restricted to the Phase 2 timeframe.

e. Temporary pumping, and temporary power are responsibilities of the Contractor and will not be provided by the Government. See SECTION 02 24 10.02 28 DEWATERING, paragraph DEWATERING OF WORK AREAS for additional information.

f. Contractor shall NOT remove Government equipment from service, and/or adjust Government equipment or valves, unless approved, in writing, by the KO.

1.2.1 Coordination for Adult Fish Passage Impacts

a. See Contracting Clause 52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK for Adult Fish Passage Work Window information. Restrictions apply to non-routine maintenance activities and construction work when fishladders are operational. Restrictions do NOT apply during fishladder outages.

b. When fishladders are operational, non-routine maintenance and construction activities meeting the following conditions require coordination via a Memorandum of Coordination (MOC) a minimum of 3 weeks prior to impacts to operations. Coordinate anticipated impacts with the KO.

1. Deviations to powerhouse unit priority or any work that

SECTION 01 14 00.20 28

affects operation of fish pumps.

2. Work within 100 feet of any fishway entrance or exit.

3. Work within 50 feet of any other part of the adult fishway.

1.3 PHASE 1 - DRAINAGE SYSTEM AND MAIN TURBINE UNIT VALVE UPGRADES

Complete the following required work during Phase 1 - Drainage System and Main Turbine Unit Valve Upgrades:

a. All work related to Drainage System upgrades, including, but not limited to the following:

1. Drainage pump, and related piping and valve upgrades.

2. Drainage sump work.

3. All Drainage header upgrades, repairs, and related work.

Includes Drainage header blockage removal, and Drainage header point repair, if needed.

4. All Cleanout Sump upgrades, including concrete removal, pump replacement, and cleanout and valve upgrades.

b. Fishway Drain Flush Line piping upgrades.

c. Upgrades of all Unwatering Pumps, as shown and specified. NOTE:

The Government will determine the order Unwatering pumps will be removed from service for refurbishment.

d. Replacement of Unwatering Pump #3 motor . Temporary power required. See SECTION 02 24 10.02 28 DEWATERING, paragraph DEWATERING OF WORK AREAS, for Temporary Power information.

e. Unwatering Pump Inlet Valves and Piping Upgrades. See Sheet M-401 for reference. Includes 14" Isolation Gate Valves and related piping on the inlet side of the Unwatering Pumps.

1. NOTE: Does NOT include suction pipes inside Unwatering Sump.

f. ALL Main Unit Draft Tube Drain Valves, Draft Tube Drain Valve Tees, Scroll Case Drain Valves, and Equalizer Valves replacements and refurbishments. NOTES:

1. NOTE: See paragraph MAIN UNIT OUTAGE REQUIREMENTS for additional information.

2. All Main Unit Draft Tube Drain Valves, Draft Tube Drain Valve Tees, Scroll Case Drain Valves, and Equalizer Valves replacements and refurbishments not completed during Phase 1 must be completed during Phase 3. Work on Main Unit valves will not be allowed during Phase 2 work.

1.3.1 Phase 1 Work Sequencing Requirements

The following tasks have sequencing requirements and must be completed in the order as specified. List may not be all inclusive:

a. Cl eanout Sump concr et e r emoval must be completed prior to Drainage

SECTION 01 14 00.20 28

Header Blockage Removal.

b. Dr ai nage Header Bl ockage Removal must be completed prior to the following:

1. Access to Draft Tube Drain Valve Pits for Main Units 7-14.

2. Removal of additional Main Units as specified in paragraph GENERAL.

3. Removal of 8" PVC Drainage Header and reconnection of 6" Drain

Pipes to original Header in EL. 207 Gallery. See al so i t em " Dr ai nage Header Pi pe Poi nt Repai r " bel ow.

c. Dr ai nage Header Pi pe Poi nt Repai r (if needed) must be completed prior to removal of 8" PVC Drainage Header and reconnection of 6" Drain Pipes to original Header in EL. 207 Gallery.

d. Dr af t Tube Dr ai n Val ve, and Dr af t Tube Dr ai n Val ve Tee r epl acement must be completed prior to replacement of Scroll Case Drain Valve and Equalization Valve upgrades, for each Main Unit.

1.3.2 Phase 1 Work Restrictions

The table below lists Phase 1 Work items with specific restrictions. List is not necessarily in sequence (unless identified as such), is not inclusive of all required work, and may not reflect all restrictions found in the Plans and Specifications. Refer to the plans and specifications for additional information. Plan sheet references are for information only and do not include all related Plan sheets.

WORK I TEM MAX.

DRAINAGE

SUMP WSE

MAX.

UNWATERING

SUMP WSE

OTHER RESTRI CTI ONS

Cleanout Sump concrete removal, EL 176 fmsl.

See sheets SD101 and S-101.

N/A N/A Sequence requirements. See paragraph "Phase 1 Work Sequencing Requirements".

Remove Drainage Header Check valve in Cleanout Sump.

See Sheet MD402, Section A2.

EL 172

fmsl

N/A

Drainage Header Blockage Removal

EL 172

fmsl

N/A Sequence requirements. See paragraph "Phase 1 Work Sequencing Requirements", and paragraph GENERAL.

WORK I TEM MAX.

DRAINAGE

SUMP WSE

MAX.

UNWATERING

SUMP WSE

OTHER RESTRI CTI ONS

Install New Drainage Header Clean out in Cleanout Sump.

See Sheets M-202, M-401.

EL 172

fmsl

N/A

Drainage Header Pipe Point Repair.

EL 172

fmsl

Verify required elevation.

N/A Sequence requirements. See paragraph "Phase 1 Work Sequencing Requirements".

Option Work. See SECTION

SECTION 33 01 30.72 28

DRAINAGE HEADER POINT REPAIR

for additional information.

Required Drainage Sump WSE dependent on elevation of damaged pipe.

Remove 8" PVC Drainage Header; Reconnect 6" Drain Pipes to original Header in EL. 207 Gallery.

See Sheets MD203, M-402 detail A1.

N/A N/A Sequence requirements. See paragraph "Phase 1 Work Sequencing Requirements".

Drainage Pump and Upper Discharge Piping replacement. Install drainage sump baffle box, and seismic bracing on Drainage Pump intake pipe.

See Sheets S-201, MD101, MD201, M-101, M-201.

Empty Drainage Sump

N/A Requires temporary pumping of Drainage Sump inflows into Unwatering Sump.

WORK I TEM MAX.

DRAINAGE

SUMP WSE

MAX.

UNWATERING

SUMP WSE

OTHER RESTRI CTI ONS

Fishway Drain Flush Line Piping upgrades.

See Sheets MD202, M-202

N/A N/A Required piping upgrades shall occur outside of the Adult Fish Passage Work Window.

See paragraph GENERAL REQUIREMENTS for additional restrictions.

Unwatering Pumps Inlet Valves and Piping upgrades.

Sheets MD402, M-401.

See paragraph PHASE 1 -

DRAINAGE SYSTEM AND

MAIN TURBINE UNIT VALVE

UPGRADES for additional information.

EL 176

fmsl

EL 177

fmsl*

No additional Main Units unwatered during this work.

Does not include piping in Unwatering Sump.

Unwatering Pump and Motor Upgrades.

See Sheets MD202, M-201, M-202.

N/A N/A Minimum of two (2) Unwatering Pumps must be operational at all times.

Replacement of Unwatering Pump #3 motor. Temporary power required.

See SECTION 43 23 31.13 28

POWERHOUSE UNWATERING PUMPS

for additional information.

WORK I TEM MAX.

DRAINAGE

SUMP WSE

MAX.

UNWATERING

SUMP WSE

OTHER RESTRI CTI ONS

Main Turbine Unit Draft Tube Drain Valve, and Draft Tube Drain Valve Tee Replacement

See Sheets MD203, MD401, M-402.

N/A EL 177

fmsl*

Sequence requirements. See paragraph "Phase 1 Work Sequencing Requirements".

Unwat er i ng Sump WSE r est r i ct i on appl i es t o Dr af t Tube Dr ai n Val ve and Dr af t Tube Dr ai n Val ve Tee r epl acement , onl y.

No additional Main Units unwatered during Draft Tube Drain Valve, or Draft Tube Drain Valve Tee replacement.

Main Turbine Unit Scroll Case Drain Valve Replacement, and Equalizer Valve Upgrades.

See Sheets MD203, MD401, M-102, M-402.

N/A N/A Sequence requirements. See paragraph "Phase 1 Work Sequencing Requirements".

NOTES:

* Unwatering Sump WSE requirements limit Main Unit unwatering.

TABLE DEFINITIONS:

1. WSE: Water Surface Elevation.

2. fmsl: Feet Mean Sea Level.

3. N/A: Not Applicable.

1.4 PHASE 2 - UNWATERING SYSTEM UPGRADES

Complete all remaining Unwatering System work during Phase 2 - Unwatering System Upgrades. Required work includes, but is not limited to the following:

a. All work related to the Unwatering System Isolation Valve replacement, the 90 degree bend immediately downstream of the valve, and installation and removal of Unwatering Discharge Plug in the tailrace. See Contracting Clause 52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK for coordination requirements.

b. All Unwatering System discharge piping and valve replacement and upgrades.

c. All Unwatering suction piping upgrades, Unwatering sump concrete removal, and related sump work.

d. Replacement of remaining Unwatering Pump motors.

e. All Electrical Upgrades impacting the Unwatering System, including upgrades to the Motor Control Center (MCC).

1.4.1 Phase 2 Work Sequencing Requirements

The following sequencing requirements must be completed as specified. See Contracting Clause 52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK, for additional information. List may not be all inclusive:

a. Unwat er i ng Syst em I sol at i on Val ve Repl acement , and 90 degr ee bend i mmedi at el y downst r eam, must be completed prior to the following:

1. Replacement of Unwatering Pump Discharge Piping.

2. Replacement of Unwatering Pump inlet suction pipes in Unwatering Sump.

1.4.2 Phase 2 Work Restrictions

a. The table below lists Phase 2 work items with specific restrictions. List is not necessarily in sequence (unless identified as such), is not inclusive of all required work, and may not reflect all restrictions found in the Plans and Specifications. Refer to the plans and specifications for additional information. Plan sheet references are for information only and do not include all related Plan sheets.

b. NOTES:

1. Unwatering Pump #3 must be operational at all times during the Phase 2 timeframe. Temporary power may be required.

2. Use of upgraded Fishway Drain Flush Line Piping to reroute Unwatering and/or Drainage Sump discharge flows, shall NOT occur during the Oregon Fish Ladder outage, with one exception.

i. Rerouting of sump flows during the Oregon Fish Ladder outage will be required for replacement of the Unwatering System Isolation Valve, and adjacent 90 degree bend downstream of the valve. Dates for this work must be coordinated with the KO. See Contracting Clause 52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK for additional information.

WORK I TEM MAX. UNWATERI NG

SUMP WSE

OTHER RESTRI CTI ONS

Unwatering System Isolation Valve Replacement.

Includes replacement of 90 degree bend immediately downstream of Valve.

See Sheets MD202, M-202.

N/A Sequence requirements. See paragraph "Phase 2 Work Sequencing Requirements".

All work must be completed as identified in Contracting Clause 52.211-10

COMMENCEMENT, PROSECUTION, AND COMPLETION

OF WORK. Includes installation and removal of Unwatering Discharge Plug in the tailrace.

Requires Unwatering Sump discharge flows to be routed through upgraded Fishway Drain Flush Line Piping.

Unwatering Pump Discharge Piping replacement/upgrades.

See Sheets MD202, M-202.

N/A Sequence requirements. See paragraph "Phase 2 Work Sequencing Requirements".

Requires Unwatering Sump discharge flows to be routed through upgraded Fishway Drain Flush Line Piping.

Temporary Pumping may be required.

Unwatering Pump inlet suction pipes replacement (in Unwatering Sump).

Includes required concrete modifications.

See Sheets MD202, MD402, M-202, M-401

Empty Sequence requirements. See paragraph "Phase 2 Work Sequencing Requirements".

Requires the following:

1. Temporary pumping of Unwatering Sump in-flows to Drainage Sump.

2. Reconfiguration of Unwatering Pumps to pull from Drainage Sump and discharge through upgraded Fishway Drain Flush Line Piping.

WORK I TEM MAX. UNWATERI NG

SUMP WSE

OTHER RESTRI CTI ONS

Remove existing, and install new Unwatering System MCC (SQ02), Controls cabinet (SQ02C), and all related electrical work.

See Sheets ED101, ED201, E-101, E-201, E-501.

N/A Requires Temporary power to new Unwatering Pump Motors prior to removing MCC from service.

TABLE DEFINITIONS:

1. WSE: Water Surface Elevation.

2. N/A: Not Applicable.

1.5 PHASE 3 - STATION SERVICE TURBINE UNIT VALVE UPGRADES AND MAIN TURBINE

UNIT VALVE UPGRADES

a. Complete all work related to Station Service Turbine Unit drain valve upgrades, including, but not limited to the following. Plan sheet references are for information only and do not include all related Plan sheets.

a 1. Replacement of Station Service Draft Tube Drain Valves, and Draft Tube Drain Valve Tee. See Sheets MD403, M-403.

b 2. Replacement of Penstock Drain Valves, and rerouting of Penstock Drain piping. See Sheets MD204, M-203.

b. See paragraph PHASE 1 - DRAINAGE SYSTEM AND MAIN TURBINE UNIT VALVE UPGRADES, and subparagraphs, for information and restrictions related to Main Unit Draft Tube Drain Valves, Draft Tube Drain Valve Tees, Scroll Case Drain Valves, and Equalizer Valves replacements and refurbishments.

1.6 MAIN UNIT OUTAGE REQUIREMENTS

Main Unit outages are required for Main Turbine Unit Valve Upgrades (Phase 1 and Phase 3 work). The following requirements apply to Main Unit Outages for work on this contract:

a. Main Units will be unwatered, prepared for Contractor work, rewatered, and returned to service by the Government.

b. Each Main Unit will be Out of Service one time only for work on this contract. All required work for the Out of Service Main Unit must be completed, commissioned, and accepted by the Government during this time.

c. A maximum of 2 (two) Main Units will be Out of Service at any time

SECTION 01 14 00.20 28

G4EDHCMP

Line for work on this contract. Out of Service includes all of the following:

1. Government Unwatering and preparation of Main Unit for Contractor work (anticipate 4 Government work days duration per Main Unit). See SECTION 01 14 00.10 28 PROJECT SITE RESTRICTIONS, paragraph "Government's Work Schedule" for Government Work Days information.

2. Contractor removal, installation, upgrade, and commissioning of all Draft Tube Drain valves, Draft Tube Drain valve tees, Scroll Case Drain valves, and Equalizer valves for the Out of Service Main Unit.

3. Government acceptance of Contractor work and Government verification Main Unit is ready to return to service.

4. Government Rewatering of Main Unit and return to service (anticipate 4 Government work days duration per Main Unit).

d. Main Units will be taken out of service in non sequential, adjacent pairs that share Draft Tube Drain valve pits (Main Units 1 & 2; Main Units 3 & 4; Main Units 5 & 6; Main Units 7 & 8; Main Units 9 & 10; Main Units 11 & 12; Main Units 13 & 14). The Government will determine the order Main Unit pairs are removed from service, and will notify the Contractor a minimum of 14 calendar days prior to the next scheduled Main Unit outage.

e. Up to 2 Main Units may be unwatered prior to start of the following activities, but Main Unit unwatering will not be allowed during any of the following:

1. Draft Tube Drain Valve, and/or Draft Tube Drain Valve tee replacement.

2. Unwatering Pumps Inlet Valves and Piping replacement.

3. When a controlled WSE is required in the Unwatering Sump.

4. When Contractor personnel are in the Unwatering Sump.

f. The Government will unwater and prepare one Main Unit for Contractor work at a time. Two Main Units will not be prepared simultaneously.

g. Unwatering of one Main Unit and rewatering of another may occur simultaneously.

h. Main Units are critical to Project operation. Once a Main Unit is removed from service, the Contractor must work expeditiously on valve replacements and upgrades in order to return the Main Unit to service with minimal delay.

1.6.1 Main Unit Outage Scheduling

a. Coordinate Main Unit Outage dates a minimum of 21 calendar days prior to anticipated start of the Out of Service period, for each Main Unit. Conduct this coordination during Government's typical scheduled work days.

b. The Government will start to unwater the Main Unit pairs contingent upon the following:

1. Outage dates have been coordinated as required.

2. All parts and equipment required to be replaced or upgraded during the coordinated outage (of the applicable pair of Main Units), is on-site, and accepted for installation by the KO.

3. No more than one Main Unit is currently Out of Service for work on this contract. See paragraph MAIN UNIT OUTAGE REQUIREMENTS, subparagraph c. At no time will more than 2 Main Units be Out of Service for work on this contract.

1.7 STATION SERVICE UNIT OUTAGE REQUIREMENTS

Station Service Turbine Unit (Station Service Unit) outages are required for Station Service Turbine Unit Valve Upgrades (Phase 3 work). The following requirements apply to Station Service Unit Outages for work on this contract:

a. Station Service Units will be unwatered, prepared for Contractor work, rewatered, and returned to service by the Government.

b. A maximum of 1 (one) Station Service Unit will be Out of Service at any time for work on this contract. Out of Service includes all of the following phases:

1. Government Unwatering and preparation of Station Service Unit for Contractor work (anticipate 4 Government work days duration per Station Service Unit).

2. Contractor removal, installation, upgrade, and commissioning of all Penstock Drain Valves and piping, Draft Tube Drain Valves, and the Draft Tube Drain Valve Tee for Out of Service, Station Service Unit.

3. Government acceptance of Contractor work and Government verification Station Service Unit is ready to return to service.

4. Government Rewatering of Station Service Unit and return to service (anticipate 4 Government work days duration per Station Service Unit).

c. Each Station Service Unit will be Out of Service one time, only, for work on this contract. All required Station Service Unit work must be completed, commissioned, and accepted by the Government during this time.

d. The Government will determine the order Station Service Units are removed from service, and will notify the Contractor a minimum of 14 calendar days prior to Station Service Unit availability for Contractor work.

e. The Government will unwater and prepare either one Main Unit or one Station Service Unit for Contractor work at a time. A Station Service Unit and a Main Unit will not be prepared simultaneously.

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f. Unwatering of one Main Unit and rewatering of another Main Unit or of a Station Service Unit may occur simultaneously.

eg. Station Service Units are critical to the Project operation.

Once a Unit is removed from service, the Contractor must work expeditiously on valve replacements and upgrades in order to return the Station Service Unit to service with minimal delay.

1.7.1 Station Service Unit Outage Scheduling

a. Coordinate Station Service Unit Outage dates a minimum of 21 calendar days prior to anticipated start of each Station Service Unit Out of Service period. Conduct this coordination during Government's typical scheduled work days.

b. The Government will start to unwater the Station Service Unit contingent upon the following:

1. Outage dates have been coordinated as required.

2. All parts and equipment required to be replaced or upgraded during the coordinated outage (of the applicable Station Service Unit), is on-site, and accepted for installation by the KO.

3. No Station Service Units are Out of Service for work on this contract. See paragraph STATION SERVICE UNIT OUTAGE REQUIREMENTS, subparagraph b. At no time will more than 1 Station Service Unit be Out of Service for work on this contract.

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION (Not Used)

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