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ExxonMobil ProprietaryFigure 4.0-1 SYU OPSRB
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ExxonMobil ProprietarySYU OPSRB
SYU Existing Offshore Facilities Overview
Figure 4.0-2
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ExxonMobil ProprietarySYU OPSRB
SYU LFC Onshore Facilities Overview
PACIFIC OCEAN
U.S. 101AND
RAILROAD
CABLE SPLICE EXCAVATION
Tunnel Access in El Capitan State Beach (Bike Path)
Tunnel Access in LFC
FIBER OPTIC CABLE(Existing Conduit to POPCO)
(OSS)
TUNNEL
Figure 4.0-3
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LFC Side of Tunnel
SYU OPSRB4
TRANSITION SPLICE AREA
LFC SIDE TUNNEL ACCESS AREA
TUNNEL
Figure 4.0-4
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Cross-Section of Tunnel
SYU OPSRB
Oil Emulsion
Water Gas
SUBMARINECABLE C1,B,A
Figure 4.0-5
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Diagram of Elevation of Tunnel and Conduit Area
SYU OPSRB
Nearshore Area LFC Area
Figure 4.0-6
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SYU Nearshore Power Cable Conduit Location
SYU OPSRB
CONDUIT TERMINUS AREA
Figure 4.0-7
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ExxonMobil Proprietary
SYU Existing Power Distribution System
State Jurisdiction
Outer Continental Shelf (Federal Jurisdiction)
Harmony
Heritage ~19 MW
Harmony ~17 MW
Hondo ~8 MW
Total ~44 MW
LFC / POPCO
E
D1
B
A
C
C1
D
SYU Offshore Power Distribution System- Original cables are shown in black (early 1990s)- OPSR-A cables are shown in blue (2003)- Dotted line represents cables taken out of service
Approximate Power Consumption
Hondo
Up to 50 MW generation at LFC
Location of fault repairs on C1 cable
SYU OPSRB
Harmony
Heritage
Figure 4.0-8
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ExxonMobil Proprietary
OPSRB Proposed ScopeDescription• Replace 2 existing submarine power cables: Replace
A (or B) with A2 (or B2) and replace C1 with F2 and G2 [Phase-2]− 29 miles of 3 phase cables; 35 kV ; 32 MW − Total cable weight approx. 2900 tons
Excavating / trenching for splicing Remove cable in tunnel & conduits
Retrieve cables and install replacement cables and P/L crossings within State Lands ROW
Remove cable fromHA & HE J- Tubes
• Retrieve and recycle 12-18 miles of Cables A (or B) and C1 (LFC to State/Federal Boundary, on and adjacent to HA and HE, and along route) [Phase-2]
• Install modifications on HA and HE for cable installation and electrical equipment [Phase-1]
Install risers and cable in centenary
Pre-Project Surveys including near shore marine biological and route archeological
Install replacement cables and cable crossings in OCS
Install new GISbuilding
SYU OPSRBFigure 4.0-9
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ExxonMobil Proprietary
SYU Cable Cross-Sections
35 kV Pirelli Cable Installed in 2003
• Kerite (1993)- Original submarine power cable installations• Pirelli (2003)- Cable C1 and D1 (Similar design except water blocking and fiber optics)• OPSRB (2015)- Similar to Pirelli with double armor wire, 46 kV insulation, and larger conductors
Fiber Optic Cable
Power Conductors
SYU OPSRB
Water Blocking
Armor Servings
Single Armor
35 kV Kerite Cable Installed in 1993
Figure 4.0-10
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ExxonMobil Proprietary
Red Cables A2 (or B2), F2 & G2 will be installed replacement cables. Blue Cables B (or A), D, D1, & E are existing cables that will remain in operation. Black Dashed Cables A (or B), C1 & C will be abandoned in place. Cables A (or B) & C1 will be retrieved in Tunnel, Conduits, State Waters and adjacent to Platforms.
OPSRB Cable Overview Diagram
Figure 4.0-11
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Typical DP Cable Installation Vessel
SYU OPSRB
Typical Typical DP Cable Installation Vessel - Preliminary Deck Layout
Figure 4.0-12
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Cable Retrieval from Conduit and Tunnel
SYU OPSRB
IDENTIFY, CUT AND RETRIEVE CABLE(CONDUIT & TUNNEL)
Figure 4.0-13
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Cable Installation Start Pull-In at Platform
SYU OPSRB
Winch (Locate asAppropriate)
PLATFORMHERITAGE DP Cable Installation Vessel ( Typical)
Existing J-Tube
Cable C1
Figure 4.0-14
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Cable Installation Platform to Platform or Platform to Shore
SYU OPSRB
DP Cable Installation Vessel ( Typical)
ROV Monitoring Touch Down as Appropriate
Figure 4.0-15
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Cable Installation Final Pull-In (Platform to Platform)
SYU OPSRB
DP Cable Installation Vessel ( Typical)
Winch (Locateas Appropriate)
Cable D1
Figure 4.0-16
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Cable Installation Final Shore Pull-In (Platform to Shore)
SYU OPSRB
DP Cable Installation Vessel ( Typical)DIVE SUPPORT VESSEL
Figure 4.0-17