Operating Data | California Gas Transmission Pipeline Status

OFO/EFO Outlook

Last Updated Friday, August 17, 2018 at 3:39 PM
Gas DayActivityToleranceStage/Noncompliance ChargeReason
8/15/2018No OFO in Effect
8/16/2018No OFO in Effect
8/17/2018No OFO in Effect
8/18/2018System Wide OFO in Effect5% Stage 1 at $ .25 /Dth High 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 04:45 PM PT

Last updated for the Gas Day of 08/17/2018
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
MMcf8/14/20188/15/20188/16/20188/17/20188/18/20188/19/20188/20/2018
4750
4700
4650
4600
4550
4500
4450
4400
4350
4300
4250
4200 42024203
4150
41004129 41284145
4050
4000 4049
3950 3977
3900
3850
3800
3750
3700
3650
3600
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
8/17/2018
Forecast
for
8/18/2018
Forecast
for
8/19/2018
Forecast
for
8/20/2018
Beginning Inventory4128414542024203
Ending Inventory4145420242034049
Inventory Change17571-154
 
Upper Limit4200415041504200
Difference*
(Upper Limit - Ending Inventory)
55-52-53151
 
Lower Limit3850375037503850
Difference*
(Ending Inventory - Lower Limit)
295452453199

*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 04:45 PM PT

Last updated for the Gas Day of 08/17/2018
Next update expected by 11:00 PM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)
Forecast
for
8/17/2018
Forecast
for
8/18/2018
Forecast
for
8/19/2018
Forecast
for
8/20/2018
COMPOSITE TEMPERATURE
Historical Average for current day: 70.4
72.473.171.969.7
Demand
On-System Demand2375222022752430
Off-System Deliveries
SoCal Gas (KRS)372390390390
Southwest Gas7777
Kern River GT - HDL56616161
Transmission Shrinkage31303030
Injection
PG&E Storage Injection (268 Maximum)*
Core, Market Center, and Pipeline Balancing
0000
Wild Goose Storage0000
Central Valley Storage0000
Lodi Storage3000
Gill Ranch Storage0666
TOTAL SYSTEM DEMAND2844271427692924
Supply
Interconnect Supply
Gas Transmission Northwest1474145014501450
Ruby517515515515
California Production36292929
SoCal Gas (KRS)0000
Kern River GT - HDL0000
Kern River GT - Daggett3333
Southern Trails0000
El Paso Natural Gas340265265265
Transwestern214235235235
Withdrawal
PG&E Storage Withdrawal (623 Maximum)*
Core, Market Center, and Pipeline Balancing
101109109109
Wild Goose Storage82666
Central Valley Storage92808080
Lodi Storage0808080
Gill Ranch Storage0000
TOTAL SYSTEM SUPPLY2861277027702770
INVENTORY CHANGE
(Supply - Demand)
17571-154
TOTAL CUSTOMER IMBALANCE8111769-86

*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
8/17/2018
Forecast
for
8/18/2018
Forecast
for
8/19/2018
Forecast
for
8/20/2018
Injection
PG&E Storage
Core and Market Center
437434409409
Wild Goose Storage333333333333
Central Valley Storage19282828
Lodi Storage97000
Gill Ranch Storage15202020
Pipeline Balancing Injection75757575
Withdrawal
PG&E Storage
Core and Market Center
613618593593
Wild Goose Storage415338338338
Central Valley Storage111108108108
Lodi Storage94808080
Gill Ranch Storage15141414
Pipeline Balancing Withdrawal0000

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

Actual
for
8/14/2018
Actual
for
8/15/2018
Actual
for
8/16/2018
COMPOSITE TEMPERATURE
Historical Average for current day: 70.4
67.468.670.4
Demand
On-System Demand251125072446
Off-System Deliveries
SoCal Gas (KRS)344353385
Southwest Gas777
Kern River GT - HDL698853
Transmission Shrinkage285030
Injection
PG&E Storage
Core, Market Center, and Pipeline Balancing
0016
Wild Goose Storage000
Central Valley Storage000
Lodi Storage030
Gill Ranch Storage000
TOTAL SYSTEM DEMAND295930082938
Supply
Interconnect Supply
Gas Transmission Northwest159014131441
Ruby168504567
California Production303029
SoCal Gas (KRS)000
Kern River GT - HDL000
Kern River GT - Daggett0120
Southern Trails000
El Paso Natural Gas337365321
Transwestern166134192
Withdrawal
PG&E Storage
Core, Market Center, and Pipeline Balancing
230114231
Wild Goose Storage285180130
Central Valley Storage17610493
Lodi Storage7400
Gill Ranch Storage26085
TOTAL SYSTEM SUPPLY308128563089
INVENTORY CHANGE
(Supply - Demand)
122-152151
TOTAL CUSTOMER IMBALANCE197-66222

*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
8/14/2018
Actual
for
8/15/2018
Actual
for
8/16/2018
Injection
PG&E Storage
Core and Market Center
424433403
Wild Goose Storage280298332
Central Valley Storage191919
Lodi Storage0598
Gill Ranch Storage202030
Pipeline Balancing Injection717860
Withdrawal
PG&E Storage
Core and Market Center
725628750
Wild Goose Storage558483464
Central Valley Storage194122112
Lodi Storage85093
Gill Ranch Storage451843
Pipeline Balancing Withdrawal000
Balancing Gas
Imbalance Gas in Storage**229923742565
PG&E Total Gas in Storage76759764140

*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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