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Spring 2021 NFGSC System Overview
Weather and Throughput Statistics
• Winter Operations 10/1/20-3/31/21
• Peak Day Throughput 2/7/21 2,528 MMCF
• Peak Day Degree Day 2/7/21 49
• Average Degree Day 2020-2021 30
• Average Degree Day 2019-2020 30
• Normal Degree Day 34
• Throughput 10/1/20-3/31/21 297 BCF
Spring 2021 NFGSC System Overview
Storage Activities
• Top Gas Capacity 77.2 BCF
• Starting Top Gas 10/1/20 71.6 BCF
• Withdrawn through 3/31/21 50.1 BCF
• Top Gas 3/31/21 21.5 BCF
5
0
500
1,000
1,500
2,000
2,500
3,000
1/7/2014 1/7/2015 2/12/2016 1/8/2017 1/5/2018 1/30/2019 2/14/2020 2/7/2021
Off-System
On-System
NFGSC Peak Day Deliveries (MDth)
6
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
2012/2013 2013/2014 2014/2015 2015/2016 2016/2017 2017/2018 2018/2019 2019/2020 2020/2021
November 1st April 1st
NFGSC Top Gas Storage Inventory (MMCF)
7
NFGSC Line X South to North
Independence
Leidy
Tuscarora
East Aurora
Niagara
NFG
Ellisburg
Mercer
Holbrook
Concord
8
0
100
200
300
400
500
600M
ar-
20
16
Ap
r-20
16
Ma
y-2
01
6
Jun
-201
6
Jul-
201
6
Au
g-2
01
6
Se
p-2
01
6
Oct-
20
16
Nov-2
016
Dec-2
016
Jan
-201
7
Fe
b-2
017
Ma
r-2
017
Ap
r-20
17
Ma
y-2
01
7
Jun
-201
7
Jul-
201
7
Au
g-2
01
7
Se
p-2
01
7
Oct-
20
17
Nov-2
017
Dec-2
017
Jan
-201
8
Fe
b-2
018
Ma
r-2
018
Ap
r-20
18
Ma
y-2
01
8
Jun
-201
8
Jul-
201
8
Au
g-2
01
8
Se
p-2
01
8
Oct-
20
18
Nov-2
018
Dec-2
018
Jan
-201
9
Fe
b-2
019
Ma
r-2
019
Ap
r-20
19
Ma
y-2
01
9
Jun
-201
9
Jul-
201
9
Au
g-2
01
9
Se
p-2
01
9
Oct-
20
19
Nov-2
019
Dec-2
019
Jan
-202
0
Fe
b-2
020
Ma
r-2
020
Ap
r-20
20
Ma
y-2
02
0
Jun
-202
0
Jul-
202
0
Au
g-2
02
0
Se
p-2
02
0
Oct-
20
20
Nov-2
020
Dec-2
020
Jan
-202
1
Fe
b-2
021
NFGSC Line X South to North
Average Daily Scheduled by Month (MDth)
10
NATIONAL FUEL GAS SUPPLY
2021 Construction and Maintenance Schedule
Effective Date: 2/17/21
Company Project Description Start Date End Date
Duration
(Days) Location Impact
Expected
Service
Level Impact
Supply
Line EE17 Hydrotest &
Remediations
Hydrotest and pipeline
replacement 04/13/21 05/07/21 25 Line EE17
Olean-area delivery points
unavailable. Critical notice ID
669862. Firm
Supply XS/XE ILI Integrity assessment 04/21/21 04/29/21 4 Lines XS & XE
Concord Station S to N constraint
reduced, primary services
curtailed. Critical notice ID 697925. Firm
Supply
Ellisburg Secondary
Fuel Gas Feed - Z20 Station upgrades May 2021 May 2021 TBD
Ellisburg Station, Line
Z20
Tuscarora receipts and deliveries
limited to primary only. Non-Firm
Supply UNY ILI Improvements ILI improvements 05/03/21 05/12/21 10 Line UNY
Between XN and Vicksburg station
- receipts from DTI RQ Points
limited, deliveries to NFGDC-NY
affected. Critical Notice ID 667892. Firm
Supply UNY ILI Integrity assessment 06/01/21 06/17/21 3 Line UNY
Receipts from DTI RQ Points
unavailable. Firm
Supply Line L Pressure Test Integrity assessment 06/01/21 06/30/21 30 Line L Production shut in. Non-Firm
Supply
YM58 to YM224 Tie-In
- FM100 Project
New pipeline construction and
tie-in to existing pipeline under
FM100 Project (CP19-491-
000) 06/15/21 06/17/21 3
Ellisburg Station, Line
YM224
Line X system outage. Concord
Station S to N constraint reduced
to zero. Firm
Construction and Maintenance Schedule
11
Company Project Description Start Date End Date
Duration
(Days) Location Impact
Expected
Service
Level Impact
Supply
Porterville
Modernization Phase
III Station upgrades
Summer
2021
Summer
2021 TBD Porterville Station
Receipts from DTI RQ Points
unavailable. Receipts from
Pendleton and Deliveries to
NFGDC-XM8 affected. Firm
Supply
Pekin Station
Upgrades Station upgrades Jul 2021 Jul 2021 TBD Pekin Station Pekin receipts unavailable Firm
Supply
Hartzfelt Mtn Station
Upgrades Station upgrades
Jul/Aug
2021
Jul/Aug
2021 TBD Hartzfelt Station Hartzfelt receipts unavailable Non-Firm
Supply
Leidy Transco
Interconnect - FM100
Project
Station upgrades under
FM100 Project (CP19-491-
000)
Jul/Aug
2021
Jul/Aug
2021 14 Leidy Station
Leidy receipts and deliveries
unavailable Firm
Supply
UNY Harris Hill to
Gunnville
Replacement Pipeline replacement 07/19/21 09/20/21 64 Line UNY
Between XN and Vicksburg station
- receipts from DTI RQ Points
limited. Firm
Supply
Ellisburg ESD RCV
Replacement Project Station upgrades Aug 2021 Aug 2021 5
Ellisburg Station, Line
YM53
Leidy receipts and deliveries
unavailable, App Zone 6 receipts
unavailable Firm
Supply
N-12 Ellwood City
OPP Station New regulator station 08/01/21 08/15/21 15 Line N12
Deliveries to PNGCG from Line
N12 limited Non-Firm
Supply NM45/S2T ILI Integrity assessment 09/01/21 09/30/21 3 Lines NM45 & S2T Production shut in. Non-Firm
Supply
Line M ILI Investigation
Digs Post ILI investigation digs Sep 2021 Sep 2021 TBD Line M
Line interruption possible but not
expected None
Supply
YM7/YM52 ILI
Investigation Digs Post ILI investigation digs Sep 2021 Sep 2021 TBD Lines YM7 & YM52
Line interruption possible but not
expected None
Construction and Maintenance Schedule
12
Company Project Description
Start
Date End Date
Duration
(Days) Location Impact
Expected
Service
Level Impact
Supply
Tamarack Compressor
Station - FM100
Project
New Tamarack compressor
station construction and tie-in
to Line YM53 under FM100
Project (CP19-491-000) 09/29/21 09/30/21 2 Line YM53
Leidy receipts and deliveries
unavailable Firm
Supply KPA ILI Improvements ILI improvements TBD TBD TBD
Overbeck Station, Line
KPA Production at Overbeck shut in Non-Firm
Supply
Gunnville Station
Modernization - XN to
UNY Station upgrades TBD TBD TBD Line XN
XN Between Pendleton and
Porterville. Non-firm receipts from
Pendleton and deliveries to
NFGDC-XM8 affected. Non-Firm
Supply
FM100 Abandonment -
FM100 Project
Pipeline abandonment under
FM100 Project (CP19-491-
000) TBD TBD N/A Line FM100 Abandonment of Line FM100 Non-Firm
Supply
Lewis Run Station CP
Upgrades Station upgrades TBD TBD TBD Line KPA
Lewis Run constraint limited to
primary only Non-Firm
Supply
Line UNY Post-ILI
Replacements
Potential pipeline
replacements following Line
UNY ILI TBD TBD TBD Line UNY
Potential outage of Line UNY.
Impact TBD. TBD
Construction and Maintenance Schedule