A map of the proposed nearly $3 billion upgrade to the Transco natural gas pipeline that will, for the first time in 50 years, change the direction gas flows along the pipeline. The change will allow Williams to flow cheap, abundant Marcellus Shale gas to the south and southwest. The change will make the pipeline bidirectional and includes building new pipeline and upgrading compressor stations. Williams is currently in the pre-filing stage with the Federal Energy Regulatory Commission.

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80
ATLANTA
CHARLOTTE
RICHMOND
PHILADELPHIA
NEW YORK CITY
WASHINGTON DC BALTIMORE
ATLANTIC SUNRISE EXPANSION PROJECT
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC.
APRIL 16, 2014 GAS PIPELINE
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STA. 520
STA. 517 STA. 515
STA. 505
STA. 205
STA. 200
STA. 195
STA. 190
STA. 185 WASHINGTON DC
BALTIMORE
PHILADELPHIA
YORK
TIOGA
PIKE
BERKS
LYCOMING
KENT
WAYNE
SULLIVAN
LUZERNE
CLINTON
BUCKS
CENTRE
BRADFORD
PERRY
LANCASTER
CHESTER
ADAMS
POTTER
MONROE
SUSSEX
SCHUYLKILL
BURLINGTON
DAUPHIN
CECIL
MORRIS
SUSSEX
FREDERICK ATLANTIC
BALTIMORE
UNION
SULLIVAN
CARROLL
SUSQUEHANNA
LEHIGH
CARBON
HARFORD
ORANGE
WYOMING
SNYDER
LEBANON
MIFFLIN
SALEM
JUNIATA
COLUMBIA
FAIRFAX
WARREN
CUMBERLAND
CUMBERLAND
NEW CASTLE
HUNTERDON
MONTGOMERY
LACKAWANNA
MONTGOMERY
CAROLINE
SOMERSET
TALBOT
HOWARD
MERCER
CAMDEN
ULSTER
NORTHAMPTON
GLOUCESTER
PRINCE GEORGES
NORTHUMBERLAND
CAPE MAY
QUEEN ANNES
DELAWARE
JEFFERSON
MONTOUR
PRINCE WILLIAM
PHILADELPHIA
UNION
CLARKE
DELAWARE
BALTIMORE CITY
WASHINGTON
FULTON
QUEEN ANNES
ESSEX
CULPEPER
PROPOSED PIPELINES
PROPOSED REPLACEMENTS
EXISTING TRANSCO PIPELINE
") EXISTING TRANSCO COMPRESSOR STATION
MARCELLUS SHALE BASIN
:0 80 16040
Miles
FIGURE 1.1-2 REV. 3 (PO XXXX)
5
17
6
11
214
3
PROPOSED PRELIMINARY PROJECT SCOPE
ATLANTIC SUNRISE EXPANSION PROJECT (Case 5D8-1)
1)
2)
3)
4)
5)
42" Central Penn Line South
30" Central Penn Line North
36" E Line GRUGAN LOOP
42" D Line UNITY LOOP
30" A & B Lines VIRGINIA Replacement
122.19
56.35
5.45
9.00
2.52
LENGTH IN MILESPIPELINE
FACILITIES/MODIFICATIONS
6) STA 605 - Construct a Greenfield compressor station around MP 53.9
7) STA 610 - Construct a Greenfield compressor station around MP 100.5
8) Receipt meter station at Owego
9) STA 520 - Add 1 ea. Solar Mars 100S (16,000 ISO HP ea.)
10) STA 520 - Replace compressor #6 & 7 internal wheels and Modify
Compressor #8 aero assemblies to accomodate new flow parameters
11) STA 517 - Add 1 ea. Solar Mars 100S (16,000 ISO HP ea.) with 3 bays
of cooling and one scrubber
12) Receipt meter station at Zick
13) Interconnect at springville pipeline crossing
14) Regular station at Transco tie-in MP L92.7
15) Tie-in at 515L40 at MP L113.75 (West Diamond)
16) Regular station at Transco tie-in MP L113.75 (West Diamond)
17) Regular station at Transco MP 1682.65 (River Road) with tie-in to three
mainlines and ODEC lateral
18) STA 190 - Modify valves and yard piping for southflow compression
19) STA 190 - Add 1 X 25,000HP electric compressor unit
20) STA 185 - Modify valves and yard piping for southflow compression
21) STA 170 - Modify valves and yard piping for southflow compression
22) STA 160 - Modify valves, yard piping and regulation for
southflow compression
23) STA 150 - Modify valves and yard piping for southflow compression,
re-located Iredell lateral backpressure regulator
24) STA 145 - Modify valves and yard piping for southflow compression
25) Supplemental Odorization from Station 140 to Station 160
i. Odor masking / de-odorization of valves at valve sites for
venting 11 valve sites
ii. Odor masking / de-odorization of valves at 4 compressor stations
(145, 150, 155, 160)
iii. Odor Detection and supplemental odorization at 41 meter stations
FOR DISCUSSION PURPOSES ONLY SUBJECT TO CHANGE
11
5
18
17
6
214
3
9
9
11
20
12
18
20
25
21
22
23
24
25
25
25
11
BI-DIRECTIONAL GAS FLOW
BI-DIRECTIONAL
G
AS
FLO
W
BI-DIRECTIONALGASFLOW
10
14
8
15
16
17
13
12
19
8
13
14
15
16
17
19
10
25
G:10176916.0 GISProject Location MapNorthern Market Area 032814.mxd