Amendment 0005 3G010 - UTILITY COORDINATION AND SEQUENCE OF CONSTRUCTION.pdf
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- Solicitation number
- N4008525R3500
About this file
This document is a utility coordination and sequence of construction drawing for a Naval Facilities Engineering Systems Command project at the Philadelphia Navy Yard Annex. The drawing details a phased construction approach for installing a new 20MW electrical feeder bypass, involving complex utility infrastructure modifications. The three-phase construction sequence requires careful coordination with Dominion Energy as a subcontractor, with specific requirements including protecting existing infrastructure, minimizing service interruptions, and precisely managing electrical ductbank and feeder installations.
Key technical requirements include providing a new S101A/B pile-supported concrete vault, establishing new ductbanks, temporarily disconnecting and modifying existing utility feeders, and installing a permanent bypass through multiple electrical manholes and vaults. Critical constraints include limiting CTF 20MW service outages to specific durations (2 calendar days in Phase 1, 5 calendar days in Phase 2), maintaining access to existing switchgear, and ensuring that the permanent CTF 20MW service remains energized throughout the remaining construction period. The utility (Dominion Energy) is required to provide updated record drawings and specific technical submittals upon project completion.
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Text version
D3 3G010
C3 3G010
B3 3G010
EMH-4193
CTF POD
EMH-4185
LBES PODS101A/B
VAULT
D3 3G010
C3 3G010
B3 3G010
EMH-4193
CTF POD
EMH-4185
LBES PODS101A/B
VAULT
Whitman, Requardt & Associates, LLP 801 South Caroline Street, Baltimore, Maryland 21231
PM/DM
BRANCH MANAGER
CHIEF ENG/ARCH
FIRE PROT. ENG.
SATISFACTORY TO
APPROVED
ACTIVITY
DATE
FOR COMMANDER NAVFAC
SEAL
A/E INFO
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SCALE:
CONSTR. CONTR. NO.
SHEET
NAVFAC DRAWING NO.
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AS NOTED
DRAWFORM REVISION: 25 AUGUST 2020
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SCALE: 3/32" = 1'-0"C1 PART PLAN AT END OF PHASE 1
GENERAL SHEET NOTES
1. THIS DRAWING SHOWS NEW, EXISTING, AND DEMOLITION WORK TO CONVEY
PHASING AND SEQUENCE OF CONSTRUCTION REQUIREMENTS RELATED TO
THE EXISTING CTF 20MW FEEDER AND NEW BYPASS. REFER TO DISCIPLINE
SPECIFIC DRAWINGS FOR MORE INFORMATION.
2. AS PART OF THIS CONTRACT, THE CONTRACTOR MUST HIRE THE UTILITY
(DOMINION ENERGY) DIRECTLY AS A SUBCONTRACTOR TO PERFORM WORK
ON THE UTILITY OWNED INFRASTRUCTURE AND FEEDERS AS IDENTIFIED IN
NOTES THAT STATE 'UITLITY MUST'.
3. PROTECT EXISTING TO REMAIN INFRASTRUCTURE. SUBMIT A PLAN FOR
REVIEW/APPROVAL BY THE UTILITY WITH MEANS AND METHODS THAT MUST
BE UTILIZED TO PROTECT EXISTING UTILITY-OWNED INFRASTRUCTURE
DURING CONSTRUCTION.
4. THE EXISTING CTF 20MW SERVICE MUST NOT BE INTERRUPTED EXCEPT AS
INDICATED AND ONLY WHEN AUTHORIZED BY THE CONTRACTING OFFICER.
20MW SERVICE OUTAGE MUST BE COORDINATED WITH UTILITY TO MINIMIZE
OUTAGE DURATION MAXIMUM EXTENT PRACTICAL.
5. ALL WORK WITHIN 5FT OF UTILITY-OWNED INFRASTRUCTURE AND/OR
SERVICE MUST BE COORDINATED WITH THE UTILITY A MINIMUM OF 14 DAYS
IN ADVANCE OF WORK TO BE PERFORMED.
6. PRIOR TO THE START OF CONSTRUCTION, COORDINATE WITH THE UTILITY
FOR SCOPING OF THE EXISTING UTILITY OWNED CTF AND LBES DUCTBANKS
SO THE UTILITY CAN DOCUMENT EXISTING CONDITIONS PRIOR TO THE START
OF WORK.
7. DO NOT DISTURB THE EXISTING SUBSURFACE OF THE EXISTING TO REMAIN
DUCTBANKS.
8. DO NOT INSTALL PILES FOR THE COOLING TOWER OR TRANSFORMER
FOUNDATIONS UNTIL NEW CTF 20MW FEEDER BYPASS IS ESTABLISHED.
9. MAINTAIN OR PROVIDE ACCESS TO THE CTF POD (EMH-4185) SWITCHGEAR,
TO INCLUDE TEMPORARY STAIRS AND WORK PLATFORMS, TO SUPPORT
OPERATION AND INSPECTION OF SWITCHGEAR DURING CONSTRUCTION
OPERATIONS. ACCESS INTERRUPTIONS MUST BE REQUESTED BY THE
CONTRACTOR AND MUST BE APPROVED BY AND COORDINATED WITH THE
GOVERNMENT FIVE WORKING DAYS IN ADVANCE OF THE WORK.
10. AS PART OF THIS CONTRACT, THE UTILITY MUST PROVIDE UPDATED RECORD
DRAWINGS OF THE CTF AND LBES UTILITY SERVICES UPON COMPLETION OF
THE PERMANENT BYPASS.
11. AS PART OF THIS CONTRACT, THE UTILITY MUST PROVIDE (FOR INFORMATION
ONLY) THE FOLLOWING SUBMITTALS TO THE CONTRACTING OFFICER FOR
THEIR DESIGN OF THE PERMANENT BYPASS: FEEDER TYPE, FEEDER LENGTH,
SPLICES, LUGS, HARDWARE, AND TESTING RESULTS.
GRAPHIC SCALE
3/32" = 1'-0"
20'12'4' 8'
SCALE:
1. PROVIDE S101 VAULT. REFER TO C1/3E608 FOR PERMANENT CTF 20MW
BYPASS MEDIUM VOLTAGE FEEDER RACKING AGAINST SOUTH WALL
AND COORDINATE CABLE RACK LOCATION WITH FUTURE DUCT BANK
INTERFACE. REFER TO STRUCTURAL DRAWINGS FOR DETAILS.
2. PROVIDE 24-WAY, (3) 2 BY 4, 6" PVC CONCRETE-ENCASED DUCT BANK.
REFER TO DETAIL A4/3E617.
3. UTILITY MUST PROVIDE 8-WAY, 4 BY 2, 6" PVC CONCRETE-ENCASED
DUCT BANK. REFER TO DETAIL B1/3E606.
4. SOLID FILL HATCH INDICATES PERMANENT CTF 20MW BYPASS MEDIUM
VOLTAGE FEEDER CONDUIT FILL.
5. UTILITY MUST DISCONNECT EXISTING CTF 20MW FEEDERS AT CTF POD.
PROVIDE TERMINATION TO CTF POD VIA PERMANENT CTF 20MW BYPASS
MEDIUM VOLTAGE FEEDER.
6. UTILITY MUST DEMOLISH EXISTING CTF DUCT BANK. CUT DUCT BANK AT
VAULT INTERFACES ON EITHER SIDE. AT THE END OF PHASE 2.
7. EXISTING UTILITY OWNED ELECTRICAL MANHOLE (EMH-4193) WITH TWO
EXISTING 20MW UTILITY SERVICES (CTF SERVICE AND LBES SERVICE).
8. EXISTING NAVY OWNED CTF POD SWITCHGEAR AND VAULT (EMH-4185).
REFER TO A4/3E608 FOR VAULT BUTTERFLY DIAGRAM.
9. EXISTING NAVY OWNED LBES POD SWITCHGEAR AND VAULT. REFER TO
C1/3E617 FOR PERMANENT CTF 20MW BYPASS MEDIUM VOLTAGE
FEEDER RACKING AGAINST SOUTH WALL.
10. EXISTING UTILITY OWNED ELECTRICAL DUCTBANK WITH TWO EXISTING
20MW UTILITY SERVICES (CTF SERVICE AND LBES SERVICE).
11. EXISTING UTILITY OWNED ELECTRICAL DUCTBANK WITH CTF 20MW
UTILITY SERVICE.
12. EXISTING UTILITY OWNED ELECTRICAL DUCTBANK WITH LBES 20MW
UTILITY SERVICE.
13. S101A/B VAULT.
14. EXISTING UTILITY OWNED ELECTRICAL DUCTBANK WITH LBES 20MW
UTILITY SERVICE AND PERMANENT CTF 20MW BYPASS.
15. SHADED FILL HATCH INDICATES EXISTING MEDIUM VOLTAGE FEEDER
CONDUIT FILL.
SHEET KEYNOTES
SCALE: 3/32" = 1'-0"A1 PART PLAN AT END OF PHASE 2
NOT TO SCALESCALE:D3 EXISTING 8-WAY DUCT BANK SECTION
NOT TO SCALESCALE:C3 24-WAY S101 VAULT DUCT BANK SECTION
NOT TO SCALESCALE:B3 8-WAY CTF POD DUCT BANK SECTION
15 (TYP.)
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SUGGESTED SEQUENCE OF
CONSTRUCTION
1. ACTIVITIES INDICATED BELOW ARE REQUIRED. THE PHASING AND ORDER OF
ACTIVITIES INCLUDED ARE SUGGESTED.
PHASE 1
1. PROVIDE PROTECTION FOR EXISTING UTILITY INFRASTRUCTURE AND
FEEDERS.
2. PROVIDE S101A/B PILE SUPPORTED CONCRETE VAULT.
3. PROVIDE DUCTBANK BETWEEN EXISTING LBES POD AND S101A/B
VAULT.
4. REMOVE PLATFORM AND FOUNDATION ON NORTH SIDE OF CTF POD
(EMH-4185).
5. COORDINATE A LIMITED OUTAGE (2 CALENDAR DAYS MAXIMUM) OF
CTF POD (EMH-4185) WITH THE UTILITY AND THE CONTRACTING
OFFICER. UTILITY MUST TEMPORARILY DISCONNECT UTILITY FEEDERS
FROM THE PRIMARY SIDE OF CTF POD. UTILITY MUST MODIFY
EXISTING CABLING ARRANGEMENT IN CTF POD TO SAW-CUT OPENING
FOR ENTRANCE OF NEW CTF 20MW FEEDER. UTILITY MUST PROVIDE
OPENING IN CTF POD FOR NEW DUCTBANK AND MUST PROVIDE
DUCTBANK BETWEEN S101A/B VAULT AND EXISTING CTF POD.
PHASE 2
1. COORDINATE A LIMITED OUTAGE (5 CALENDAR DAYS MAXIMUM) OF
THE CTF POD (EMH-4185) WITH THE UTILITY AND THE CONTRACTING
OFFICER FOR PHASE 2 WORK.
2. UTILITY MUST PROVIDE NEW FEEDERS FROM MANHOLE (EMH-4193)
AND SPLICE IF REQUIRED.
3. UTILITY MUST PROVIDE NEW FEEDERS IN PERMANENT BYPASS
THROUGH EXISTING LBES DUCTBANK, EXISTING LBES POD VAULT,
NEW S101A/B VAULT, NEW DUCTBANK AND INTO EXISTING CTF POD
(EMH-4185).
4. UTILITY MUST PULL/REMOVE FEEDERS FROM EXISTING CTF POD
(EMH-4185) THROUGH EXISTING CTF DUCTBANK AND BACK TO
EXISTING UTILITY MANHOLE (EMH-4193).
5. UTILITY MUST DEMOLISH EXISTING CTF DUCTBANK FLUSH WITH
EXISTING CTF POD (EMH-4185) AND MANHOLE AND SEAL/PLUG THE
ABANDONED SLEEVES AT VAULTS.
6. UTILITY MUST PERFORM WORK AND COORDINATE WITH THE
CONTRACTOR TO LIMIT OUTAGE OF THE CTF 20MW SERVICE.
7. RE-INSTALL TEMPORARILY REMOVED PLATFORM.
PHASE 3
1. THE PERMANENT CTF 20MW SERVICE REMAINS ENERGIZED AND
CANNOT ACCOMMODATE ADDITIONAL OUTAGES FOR REMAINING
DURATION OF CONSTRUCTION.
END OF PHASE 1 END OF PHASE 2
END OF PHASE 1 END OF PHASE 2
END OF PHASE 1 END OF PHASE 2
4 (TYP.)
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