Operating Data | California Gas Transmission Pipeline Status

OFO/EFO Outlook

Last Updated Monday, October 16, 2017 at 1:27 PM
Gas DayActivityToleranceStage/Noncompliance ChargeReason
10/14/2017No OFO in Effect
10/15/2017No OFO in Effect
10/16/2017No OFO in Effect
10/17/2017System Wide OFO in Effect7% Stage 1 at $ .25 /Dth Low Inventory

When an OFO or EFO has been called, customers' supplies are required to be within the tolerance requirement of daily usage to avoid noncompliance penalties. The criteria for complying with an OFO or EFO are described here.

For additional information, please contact the PG&E Scheduling Helpline at (800) 343-4743.

While updates to the OFO Outlook are posted here, customers should use INSIDEtracc as their primary source for OFO notification and updated information. For specific end-use customer information, please see INSIDEtracc.

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System Inventory Status

Plan 3, posted 04:18 PM PT

Last updated for the Gas Day of 10/16/2017
Next update expected by 11:00 PM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)

Ending Inventory HistoryEnding Inventory Forecasts
MMcf10/13/201710/14/201710/15/201710/16/201710/17/201710/18/201710/19/2017
4750
4700
4650
4600
4550
4500
4450
4400
4350
4300
4250
4200
4150
4100 4136
4050 4082
40004045
3950 3986
3900
3850
3800 3830
3750
3700
3650
3600
3550 3553
3500
3450
3400
3350
3300
3250 3267
3200
Within Operating Limits
Outside Operating Limits

All numbers are expressed in MMcf/day. When the forecast pipeline ending inventory exceeds the upper pipeline inventory operating limit or falls below the lower pipeline inventory operating limit, an OFO may be called to maintain the integrity and reliability of the gas transportation system.


Note: Historical data for yesterday is not available until mid-morning today.

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System Inventory Summary

Forecast
for
10/16/2017
Forecast
for
10/17/2017
Forecast
for
10/18/2017
Forecast
for
10/19/2017
Beginning Inventory4082398638303553
Ending Inventory3986383035533267
Inventory Change-96-156-277-286
 
Upper Limit4300430043004300
Difference*
(Upper Limit - Ending Inventory)
3144707471033
 
Lower Limit3900390039003900
Difference*
(Ending Inventory - Lower Limit)
86-70-347-633

*Forecast differences of less than 0 for the day after the current gas day (day 1) indicate that that PG&E may call an OFO to maintain pipeline integrity. Caution: This is PG&E's forecast of system inventory. Because market behavior and forecast loads can vary widely, this forecast may change significantly within the gas day and should therefore be used with caution. Forecasts further into the future are more likely to change than days closer to the current gas day e.g., the forecast for gas day 3 is subject to more change than the forecast for day 1.
All numbers are expressed in MMcf.
When an OFO has been called for the day after the current gas day (day 1), plans after the first plan of the gas day (posted by 8:00 AM) will often reflect changed market behavior and will show inventory projections within the established limits.

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PG&E Supply and Demand Forecast
(Net Physical Flows)

Plan 3, posted 04:18 PM PT

Last updated for the Gas Day of 10/16/2017
Next update expected by 11:00 PM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)
Forecast
for
10/16/2017
Forecast
for
10/17/2017
Forecast
for
10/18/2017
Forecast
for
10/19/2017
COMPOSITE TEMPERATURE
Historical Average for current day: 63.7
65.163.362.261
Demand
On-System Demand1990210521002110
Off-System Deliveries
SoCal Gas (KRS)288296296296
Southwest Gas8888
Kern River GT - HDL60979797
Transmission Shrinkage26262525
Injection
PG&E Storage Injection (313 Maximum)*
Core, Market Center, and Pipeline Balancing
121000
Wild Goose Storage0000
Central Valley Storage118505050
Lodi Storage0000
Gill Ranch Storage6666
TOTAL SYSTEM DEMAND2618258825822592
Supply
Interconnect Supply
Gas Transmission Northwest937960960960
Ruby659586530530
California Production31313131
SoCal Gas (KRS)0000
Kern River GT - HDL0000
Kern River GT - Daggett0444
Southern Trails35353535
El Paso Natural Gas154186186186
Transwestern372374374374
Withdrawal
PG&E Storage Withdrawal (712 Maximum)*
Core, Market Center, and Pipeline Balancing
01326363
Wild Goose Storage143626262
Central Valley Storage0000
Lodi Storage191626262
Gill Ranch Storage0000
TOTAL SYSTEM SUPPLY2522243223062306
INVENTORY CHANGE
(Supply - Demand)
-96-156-277-286
TOTAL CUSTOMER IMBALANCE-154-221-287-297

*Maxima for injection and withdrawal apply to current day only.
Note: All numbers are expressed in MMcf/d. Differences may exist between these figures and those shown in PG&E's INSIDEtracc. This data is PG&E's best estimate using operational data.

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PG&E Storage Activity Forecast
(Scheduled Volumes)

Forecast
for
10/16/2017
Forecast
for
10/17/2017
Forecast
for
10/18/2017
Forecast
for
10/19/2017
Injection
PG&E Storage
Core and Market Center
460253256256
Wild Goose Storage386435435435
Central Valley Storage147808080
Lodi Storage60131131131
Gill Ranch Storage12121212
Pipeline Balancing Injection0000
Withdrawal
PG&E Storage
Core and Market Center
270310243243
Wild Goose Storage529497497497
Central Valley Storage30303030
Lodi Storage251193193193
Gill Ranch Storage5666
Pipeline Balancing Withdrawal69757575

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PG&E Recent Supply and Demand Data
(Net Physical Flows)

Actual
for
10/13/2017
Actual
for
10/14/2017
Actual
for
10/15/2017
COMPOSITE TEMPERATURE
Historical Average for current day: 63.7
60.862.763.7
Demand
On-System Demand171016041771
Off-System Deliveries
SoCal Gas (KRS)382285320
Southwest Gas8109
Kern River GT - HDL90500
Transmission Shrinkage282727
Injection
PG&E Storage
Core, Market Center, and Pipeline Balancing
47225225
Wild Goose Storage000
Central Valley Storage0114117
Lodi Storage000
Gill Ranch Storage030
TOTAL SYSTEM DEMAND226523182470
Supply
Interconnect Supply
Gas Transmission Northwest938974931
Ruby699653645
California Production353336
SoCal Gas (KRS)000
Kern River GT - HDL000
Kern River GT - Daggett440
Southern Trails352932
El Paso Natural Gas186190155
Transwestern360366361
Withdrawal
PG&E Storage
Core, Market Center, and Pipeline Balancing
000
Wild Goose Storage356565
Central Valley Storage000
Lodi Storage16095191
Gill Ranch Storage000
TOTAL SYSTEM SUPPLY245324092416
INVENTORY CHANGE
(Supply - Demand)
18891-54
TOTAL CUSTOMER IMBALANCE29815028

*Until yesterday's final figures are released, all numbers in this column will appear as 0.
Note: All numbers are expressed in MMcf/d. Differences may exist between these figures and those shown in PG&E's INSIDEtracc. This data is PG&E's best estimate using operational data.

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PG&E Recent Storage Activity
(Scheduled Volumes)

Actual
for
10/13/2017
Actual
for
10/14/2017
Actual
for
10/15/2017
Injection
PG&E Storage
Core and Market Center
356473474
Wild Goose Storage328377386
Central Valley Storage29147147
Lodi Storage06060
Gill Ranch Storage121212
Pipeline Balancing Injection1200
Withdrawal
PG&E Storage
Core and Market Center
321253252
Wild Goose Storage361441452
Central Valley Storage303030
Lodi Storage155155251
Gill Ranch Storage1300
Pipeline Balancing Withdrawal023
Balancing Gas
Imbalance Gas in Storage**435144694508
PG&E Total Gas in Storage944389448594709

*Until yesterday's final figures are released, all numbers (expressed in MMcf/d) in this column will appear as 0.
** Suspension of pipeline balancing injection or withdrawal may occur if Imbalance Gas in Storage exceeds balancing inventory limits. If Imbalance Gas in Storage is greater than 4.040 Bcf, pipeline balancing injection may not be available. If Imbalance Gas in Storage is at or below 0.0 Bcf, balancing withdrawal will not be available.
The daily change of Imbalance Gas in Storage may not equal the daily Pipeline Balancing. This is because Pipeline Balancing is the entire system balancing required for the day and Imbalance Gas in Storage is only the Cumulative Imbalance portion of the entire system imbalance gas in storage. PG&E may include the entire system imbalance gas as the Imbalance Gas in Storage sometime in the future.

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