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31Massachusetts Clean Energy Center | 2017 Massachusetts Offshore Wind Ports & Infrastructure Assessment

Brayton Point Power Plant Site – Somerset


Brayton Point Power Plant Site – Existing Site Information

Item Existing Conditions at Site

Ownership Private: Brayton Point Energy (c/o Dynegy)

Acreage 307 acres (124 ha)

Nautical Distance to Leading Edge of Offshore Wind Areas 37 nm (69 km)

Quayside Length 700 ft (210 m) – marginal wharf / dock 500 ft (150 m) – oil tanker offloading pier

Berth Depth 34.5 ft (10.5 m) MLLW

Channel Controlling Depth 34.5 ft (10.5 m) MLLW

Load Bearing Capacity<3,000 psf (14.6 t/m2) – upland <2,000 psf (9.8 t/m2) – quayside

On-Site Power Water/electricity at berth

Infrastructure and Buildings 1 large power plant building and numerous small out buildings. 3 liquid fuel tanks

Key Environmental Information 2 AULs. Fly ash impoundments on site.

Overhead RestrictionsMount Hope Bridge: 135 ft (41.2 m) V Newport / Pell Bridge: 194 ft (59.2 m) V


Brayton Point Power Plant Site – Somerset

Brayton Point Power Plant Site: This former power plant site is ideal for a broad range of manufacturing activities, although it has some challenges to use for other components. Potential challenges include: the fact that the acreage is bisected by the old power plant (making it inconvenient to connect the open portions of the site), the number of bridges in Mount Hope Bay, and a quayside that is appropriate for fueling but not load-out. The site also has advantages: one of the largest available acreages on the waterfront in the northeast, industrial history and neighborhood used to industry. It is thought that, with a low-modest investment, the site could be well utilized without removing the power plant, and with a larger investment the power plant could be removed to enhance the connectivity of the site.

Innovation-based Solutions: With some engineering upgrades, there is a large amount of acreage available for offshore wind development at this site. Adaptive use modifications that could be applied at Brayton Point include:

• Demolition and removal of the above ground storage tanks at the site; • Filling and regrading of the secondary containment dikes from the fuel holder

tanks as well as the coal storage area; • Demolition and removal of the onsite secondary buildings; demolition of old

crane at quayside; • Filling and regrading of holding basins for fluids at the site (including raceways,

settling ponds, holding ponds, and water movement canals); • Rehabilitation and capping of onsite ash landfills to make that acreage useable

for offshore wind; and• Rehabilitation of the quayside and wharf.

Other potential alternatives include: use of intra-site transport systems such as a barge system to move components around the site; creation of crane pad at quayside to enhance load-out scenarios, or use of elevator barge system to move components from quayside to marshalling port, staging area, or directly to the offshore wind farm.

*MassCEC considered only a portion of the 307-acre Brayton Point site for the Ports Assessment.


Brayton Point Power Plant Site – Reuse Card

Reuse Case Statistics Summary Table: Brayton Point Power Plant - Somerset

Reuse Case Acreage Used for this Reuse Case

Pre-production Storage Area

Post-production Laydown Area

# Buildings (see Notes for details)

Ground Bearing Strength Quay Length Berth Depth at

Quayside Notes:

acres hectares acres hectares acres hectares psf t/m2 feet meters feet meters

Operations & Maintenance: 20.6 8.3 18.3 7.4 -- -- 2 2,000 9.8 400 121.9 34.0 10.4 Bldg. 1: O&M Command (200' x 400' / 61m x 122m); Bldg. 2: Warehouse (150’ x 150’ / 46m x 46m).”

Cables: 39.6 16.0 4.8 1.9 10.2 4.1 2 3,000 14.7 700 213.4 34.0 10.4 Bldg. 1: Manufacturing (650' x 300' / 198m x 91m); Bldg. 2: Warehouse (300’ x 200’ / 91m x 61m).

Substations: 39.6 16.0 4.0 1.6 17.0 6.9 1 4,000 19.6 700 213.4 34.0 10.4 Bldg. 1: Warehouse & Fabrication (650'x300' / 198m x 91m).

Gravity Foundations: 39.6 16.0 4.0 1.6 -- -- 1 4,000 19.6 1,000 304.8 34.0 10.4 Bldg. 1: Support Building (150' x 150' / 46m x 46m). Foundation elevator needed.

Monopiles / Transition Pieces / Towers: 186.0 75.3 33.0 13.4 20.0 8.1 7 4,000 19.6 700 213.4 34.0 10.4

Bldgs. 1,2,3,4,5: Production, Rolling, Assembly Buildings (650' x 150' / 198m x 46m) ea; Bldg. 6: Coating Bldg. (260’ x 130’ / 79m x 40m); Bldg. 7: Support Bldg. (200’ x 150’ / 61m x 46m).

Nacelles: 130.0 52.6 20.0 8.1 20.0 8.1 3 4,000 19.6 700 213.4 34.0 10.4Bldg. 1: Manufacturing Bldg. (600' x 200' / 183m x 61m); Bldg. 2: Assembly Bldg. (700’ x 350’ / 213m x 107m); Bldg. 3: Support Bldg. (200’ x 150’ / 61m x 46m).

Blades: 186.0 75.3 50.0 20.2 40.0 16.2 3 4,000 19.6 700 213.4 34.0 10.4Bldg. 1: Production Bldg. (700' x 250' / 213m x 76m); Bldg. 2: Assembly Bldg. (260’ x 130’ / 79m x 40m); Bldg. 3: Support Bldg. (200’ x 150’ / 61m x 46m).”

Jacket Foundations 186.0 75.3 30.0 12.1 87.0 35.2 2 4,000 19.6 730 222.5 34.0 10.4 Bldg. 1: Fabrication Bldg. (700' x 300' / 213m x 91m); Bldg. 2: Storage Bldg. (250’ x 125’ / 213m x 91m).

*Quayside improvements required and included in reuse scenario unless noted in site card table.


Brayton Point Power Plant Site – Reuse Costs

Scenario Name Item Redevelopment Classification

Redevelopment Costs Reuse Costs Total Costs

Reuse Case 1A Operations and Maintenance Low A $15,271,000 $6,139,000 $21,409,000

Reuse Case 1B Cables Low B $31,456,000 $17,811,000 $49,267,000

Reuse Case 1C Substation Low B $31,456,000 $18,595,000 $50,051,000

Reuse Case 1D Gravity Foundations Low B $31,456,000 $24,325,000 $55,781,000

Reuse Case 2A Towers Medium $83,551,000 $29,936,000 $113,487,000

Reuse Case 2A Monopile Foundations, Transition Pieces Medium $83,551,000 $29,936,000 $113,487,000

Reuse Case 2B Nacelles Medium $83,551,000 $15,494,000 $99,045,000

Reuse Case 2C Blades Medium $83,551,000 $18,670,000 $102,221,000

Reuse Case 3A Jacket Foundations High $167,328,000 $23,580,000 $190,908,000

Cost Summary


Brayton Point Redevelopment Cost DetailsRedevelopment Classification Item Unit Cost Units Quantity Amount

Low

MCP Filings (Closure Reports) $200,000 LS 1 $200,000 Subtotal $12,726,000Remove Building $8 SQFT 15,000 $120,000 20% $2,545,000Remove Coal Handling Equipment $8 SQFT 45,000 $360,000 Total $15,271,000Fill in Pond 27,000 SQT with 4' of fill $8 CYD 4,000 $32,000Import Clean Fill $25 TN 6,000 $150,000Remove 2 feet in Coal Pile Area (1000' x 550') $8 CYD 41,000 $328,000Dispose Off-site as non-Haz $75 TN 61,500 $4,613,000Import Clean Fill $25 TN 61,500 $1,538,000Place Clean Fill $8 CYD 41,000 $328,000Add DGA $38 TN 87,200 $3,270,000Place DGA $8 CYD 58,133 $465,000Add CGF $25 TN 43,600 $1,090,000Place CGF $8 CYD 29,067 $233,000Remove 3 ASTs $200,000 EA 3 $600,000 Subtotal $26,214,000Remove 2 feet in tank farm area (800' x 700') $8 CYD 42,000 $336,000 20% $5,243,000Dispose Off-site as non-Haz $75 TN 63,000 $4,725,000 Total $31,456,000Import Clean Fill $25 TN 63,000 $1,575,000Place Clean Fill $8 CYD 42,000 $336,000Add DGA $38 TN 102,000 $3,825,000Place DGA $8 CYD 68,000 $544,000Add CGF $25 TN 51,000 $1,275,000Place CGF $8 CYD 34,000 $272,000

Medium

Close the two remaining Landfills (750' x 260' and 500' x $200,000 Acre 9 $1,800,000 Subtotal $69,626,000Fill in 300,000 sqft of pond by 4 feet deep or 45,000 CYD or $25 TN 67,500 $1,688,000 20% $13,925,000Place Clean Fill $8 CYD 45,000 $360,000 Total $83,551,000Approximately 8M to treat on-site $0 gallon 8,000,000 $2,000,000Add DGA $38 TN 630,000 $23,625,000Place DGA $8 CYD 420,000 $3,360,000Add CGF $25 TN 315,000 $7,875,000Place CGF $8 CYD 210,000 $1,680,000Dredge 150' x 730' x 2' $125 CYD 8,200 $1,025,000

High

Power Plant Demolition $65,000,000 LS 1 $65,000,000 Subtotal $139,440,000Add DGA $38 TN 83,000 $3,113,000 20% $27,888,000Place DGA $8 CYD 55,333 $443,000 Total $167,328,000Add CGF $25 TN 41,500 $1,038,000Place CGF $8 CYD 27,667 $221,000

Comments: for this location, each higher redevelopment scenario includes costs from the lower ones.


Brayton Point Reuse Cost DetailsRedevelopment Classification Item Unit Cost Units Quantity Amount

Gravity Foundations

Crane pad (50' x 50' x 5') $780,000 per unit 1 $780,000 Subtotal $20,271,000Support Building $16 40,000 $648,000 20% $4,054,000Appurtenance, Doors, Electrical etc. $100,000 per unit 1 $100,000 Total $24,325,000Pile supported conc. Grade beams with rails $3,500 LF 2,800 $9,800,000 Elevator $7,500,000 EA/Installed 1 $7,500,000 Concrete Plant $200,000 EA/Installed 1 $200,000 Berth dredging (1' average cut) $125 CYD 4,100 $513,000Repair Existing Pier $1,000 LF 730 $730,000

Monopile Foundations / Transition Pieces

Rolling Buidling (650' x 150') $45 SQFT 97,500 $4,378,000 Subtotal $24,947,000Appurtenances, Doors, Electrical etc. $600,000 per unit 1 $600,000 20% $4,989,000Overhead cranes $1,000,000 per unit 2 $2,000,000 Total $29,936,000Assembly Buidling (650' x 150') $45 SQFT 97,500 $4,378,000Appurtenances, Doors, Electrical etc. $600,000 per unit 1 $600,000Overhead cranes $1,000,000 per unit 2 $2,000,000Coating Buidling (130' x 260') $45 SQFT 33,800 $1,518,000Appurtenances, Doors, Electrical etc. $600,000 per unit 1 $600,000Overhead cranes $1,000,000 per unit 1 $1,000,000Warehouse Building (150' x 650') $16 97,500 $1,580,000Appurtenances, Doors, Electrical etc. $200,000 1 $200,000Warehouse $1,779,500 per unit 2 $3,559,000Crane pad (50' x 50' x 5') $780,000 per unit 1 $780,000Repair Existing Pier $1,000 LF 730 $730,000 Berth dredging (2' average cut) $125 CYD 8,200 $1,025,000

Jacket Foundations

Fabrication Building (700' x 300') $45 SQFT 210,000 $9,429,000 Subtotal $19,650,000Appurtenances, Doors, Electrical etc. $600,000 per unit 1 $600,000 20% $3,930,000Overhead cranes $1,000,000 per unit 2 $2,000,000 Total $23,580,000Building (125' x 250') $16 SQFT 31,250 $506,000Appurtenances, Doors, Electrical etc. $200,000 per unit 1 $200,000Crane pad (50' x 50' x 5') $780,000 per unit 1 $780,000Harden Quayside (50' x 730') $7,000 LF 730 $5,110,000 Berth dredging - 730' x 150' x 34' (2' average cut) $125 CYD 8,200 $1,025,000



Towers

Rolling Buidling (650' x 150') $45 SQFT 97,500 $4,378,000 Subtotal $24,947,000Appurtenances, Doors, Electrical etc. $600,000 per unit 1 $600,000 20% $4,989,000Overhead cranes $1,000,000 per unit 2 $2,000,000 Total $29,936,000Assembly Buidling (650' x 150') $45 SQFT 97,500 $4,378,000Appurtenances, Doors, Electrical etc. $600,000 per unit 1 $600,000Overhead cranes $1,000,000 per unit 2 $2,000,000Coating Buidling (130' x 260') $45 SQFT 33,800 $1,518,000Appurtenances, Doors, Electrical etc. $600,000 per unit 1 $600,000Overhead cranes $1,000,000 per unit 1 $1,000,000Warehouse Building (150' x 650') $16 97,500 $1,580,000Appurtenances, Doors, Electrical etc. $200,000 1 $200,000Warehouse $1,779,500 per unit 2 $3,559,000Crane pad (50' x 50' x 5') $780,000 per unit 1 $780,000Repair Existing Pier $1,000 LF 730 $730,000Berth dredging - 730' x 150' x 34' (2' average cut) $125 CYD 8,200 $1,025,000

Blades

Production Building (700' x 250') $45 SQFT 175,000 $7,858,000 Subtotal $15,558,000Appurtenances, Doors, Electrical etc. $600,000 per unit 1 $600,000 20% $3,112,000Overhead cranes $1,000,000 per unit 2 $2,000,000 Total $18,670,000Building (130' x 260') $45 SQFT 33,800 $1,518,000Appurtenances, Doors, Electrical etc. $200,000 per unit 1 $200,000Support Building $16 40,000 $648,000Appurtenances, Doors, Electrical etc. $200,000 per unit 1 $200,000Crane pad (50' x 50' x 5') $780,000 per unit 1 $780,000Repair Existing Pier $1,000 LF 730 $730,000Berth dredging - 730' x 150' x 34' (2' average cut) $125 CYD 8,200 $1,025,000

Nacelles

Building (700' x 350') $45 SQFT 245,000 $11,001,000 Subtotal $12,912,000Appurtenances, Doors, Electrical etc. $600,000 per unit 1 $600,000 20% $2,582,000Overhead cranes $1,000,000 per unit 1 $1,000,000 Total $15,494,000Building (600' x 200') $45 SQFT 120,000 $5,388,000Appurtenances, Doors, Electrical etc. $400,000 per unit 1 $400,000Overhead cranes $1,000,000 per unit 1 $1,000,000Support Building $16 40,000 $648,000Appurtenances, Doors, Electrical etc. $200,000 per unit 1 $200,000Crane pad (50' x 50' x 5') $780,000 per unit 1 $780,000Repair Existing Pier $1,000 LF 730 $730,000Berth dredging - 730' x 150' x 34' (2' average cut) $125 CYD 8,200 $1,025,00040 Acre Credit-Fill/Surface Treatment not required $34 CYD -290,000 -$9,860,000



Cables

Crane pad (50' x 50' x 5') $780,000 per unit 1 $780,000 Subtotal $14,843,000Manufacturing Building (650' x 300') $45 SQFT 195,000 $8,756,000 20% $2,969,000Appurtenances, Doors, Electrical etc. $600,000 per unit 1 $600,000 Total $17,811,000Overhead cranes, small $500,000 per unit 2 $1,000,000Warehouse Building (300' x 200') $16 SQFT 60,000 $972,000Appurtenances, Doors, Electrical etc. $200,000 per unit 1 $200,000Crane pad (50' x 50' x 5') $780,000 per unit 1 $780,000Repair Existing Pier $1,000 LF 730 $730,000Berth dredging - 730' x 150' x 34' (2' average cut) $125 CYD 8,200 $1,025,000

Substation

Crane pad (50' x 50' x 5') $780,000 per unit 2 $1,560,000 Subtotal $15,496,000Building (650' x 300') $45 SQFT 195,000 $8,756,000 20% $3,099,000Appurtenances, Doors, Electrical etc. $600,000 per unit 1 $600,000 Total $18,595,000Overhead cranes, small $500,000 per unit 2 $1,000,000Refurbish Existing Pier $3,500 LF 730 $2,555,000Berth dredging - 730' x 150' x 34' (2' average cut) $125 CYD 8,200 $1,025,000

Operations and Maintenance

Refurbish Existing Pier $3,500 LF 730 $2,555,000 Subtotal $5,116,000Floating Concrete Dock/Slip Piles $1,000 LF 500 $500,000 20% $1,023,000O&M Building (150' x 150') $16 SQFT 22,500 $365,000 Total $6,139,000Appurtenances, Doors, Electrical etc. $200,000 per unit 1 $200,000O&M Command Center & Storehouse $16 80,000 $1,296,000Appurtenances, Doors, Electrical etc. $200,000 per unit 1 $200,000

Scenario Name Sce ItemRedevelopment Classification

Redevelopment Costs Reuse Costs Total Costs

Reuse Case 1A Operations and Maintenance Low A $15,271,000 $6,139,000 $21,409,000Reuse Case 1B Cables Low B $31,456,000 $17,811,000 $49,267,000Reuse Case 1C Substation Low B $31,456,000 $18,595,000 $50,051,000Reuse Case 1D Gravity Foundations Low B $31,456,000 $24,325,000 $55,781,000Reuse Case 2A Monopile Foundations / Transition Pieces Medium $83,551,000 $29,936,000 $113,487,000Reuse Case 2A Towers Medium $83,551,000 $29,936,000 $113,487,000Reuse Case 2B Nacelles Medium $83,551,000 $15,494,000 $99,045,000Reuse Case 2C Blades Medium $83,551,000 $18,670,000 $102,221,000Reuse Case 3A Jacket Foundations High $167,328,000 $23,580,000 $190,908,000

Brayton Point Total Cost Details

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