Operating Data | California Gas Transmission Pipeline Status

OFO/EFO Outlook

Last Updated Friday, July 31, 2015 at 7:29 AM
Gas DayActivityToleranceStage/Noncompliance ChargeReason
7/29/2015No OFO in Effect
7/30/2015No OFO in Effect
7/31/2015No OFO in Effect
8/1/2015No OFO in Effect

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 4, posted 09:51 PM PT

Last updated for the Gas Day of 07/31/2015
Next update expected by 8:00 AM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)

Ending Inventory HistoryEnding Inventory Forecasts
MMcf7/28/20157/29/20157/30/20157/31/20158/1/20158/2/20158/3/2015
4750
4700
4650
4600
4550
4500
4450
4400
4350
4300
4250
42004203 4242
4150
4100 4113 4126
4050 40654081
4000
3950
3900 3949
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
7/31/2015
Forecast
for
8/1/2015
Forecast
for
8/2/2015
Forecast
for
8/3/2015
Beginning Inventory4081394941134242
Ending Inventory3949411342424126
Inventory Change-132164129-116
 
Upper Limit4350430043004300
Difference*
(Upper Limit - Ending Inventory)
40118758174
 
Lower Limit4000390039003900
Difference*
(Ending Inventory - Lower Limit)
-51213342226

*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 8:30 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 4, posted 09:51 PM PT

Last updated for the Gas Day of 07/31/2015
Next update expected by 8:00 AM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)
Forecast
for
7/31/2015
Forecast
for
8/1/2015
Forecast
for
8/2/2015
Forecast
for
8/3/2015
COMPOSITE TEMPERATURE
Historical Average for current day: 70.6
72.171.470.670.7
Demand
On-System Demand2,2351,8501,8852,130
Off-System Deliveries
SoCal Gas (KRS)344368368368
Southwest Gas3333
Kern River GT - HDL100484848
Transmission Shrinkage30282828
Injection
PG&E Storage Injection (329 Maximum)*
Core, Market Center, and Pipeline Balancing
36323232
Wild Goose Storage64757575
Central Valley Storage0000
Lodi Storage48000
Gill Ranch Storage0122
TOTAL SYSTEM DEMAND2,8612,4042,4412,686
Supply
Interconnect Supply
Gas Transmission Northwest1,2501,1921,1921,192
Ruby836880880880
California Production36363636
SoCal Gas (KRS)0000
Kern River GT - HDL0000
Kern River GT - Daggett35888
Southern Trails79797979
El Paso Natural Gas233148148148
Transwestern243157157157
Withdrawal
PG&E Storage Withdrawal (1,203 Maximum)*
Core, Market Center, and Pipeline Balancing
0000
Wild Goose Storage0000
Central Valley Storage15212121
Lodi Storage0494949
Gill Ranch Storage0000
TOTAL SYSTEM SUPPLY2,7282,5692,5692,569
INVENTORY CHANGE
(Supply - Demand)
-132164129-116
TOTAL CUSTOMER IMBALANCE-177233194-50

*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
7/31/2015
Forecast
for
8/1/2015
Forecast
for
8/2/2015
Forecast
for
8/3/2015
Injection
PG&E Storage
Core and Market Center
214220220220
Wild Goose Storage381565565565
Central Valley Storage2111
Lodi Storage97484848
Gill Ranch Storage13222
Pipeline Balancing Injection0757575
Withdrawal
PG&E Storage
Core and Market Center
142254253253
Wild Goose Storage317490490490
Central Valley Storage10222222
Lodi Storage49979797
Gill Ranch Storage17101010
Pipeline Balancing Withdrawal36000

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

Actual
for
7/28/2015
Actual
for
7/29/2015
Actual
for
7/30/2015
COMPOSITE TEMPERATURE
Historical Average for current day: 70.6
79.677.875
Demand
On-System Demand2,3012,5052,398
Off-System Deliveries
SoCal Gas (KRS)311301336
Southwest Gas232
Kern River GT - HDL9596104
Transmission Shrinkage303030
Injection
PG&E Storage
Core, Market Center, and Pipeline Balancing
1201110
Wild Goose Storage000
Central Valley Storage000
Lodi Storage000
Gill Ranch Storage090
TOTAL SYSTEM DEMAND2,8603,0542,869
Supply
Interconnect Supply
Gas Transmission Northwest1,0751,0751,208
Ruby991983847
California Production373738
SoCal Gas (KRS)000
Kern River GT - HDL000
Kern River GT - Daggett507860
Southern Trails778181
El Paso Natural Gas189163170
Transwestern290255312
Withdrawal
PG&E Storage
Core, Market Center, and Pipeline Balancing
000
Wild Goose Storage145190125
Central Valley Storage000
Lodi Storage1065445
Gill Ranch Storage000
TOTAL SYSTEM SUPPLY2,9602,9162,885
INVENTORY CHANGE
(Supply - Demand)
100-13816
TOTAL CUSTOMER IMBALANCE187-54-71

*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
7/28/2015
Actual
for
7/29/2015
Actual
for
7/30/2015
Injection
PG&E Storage
Core and Market Center
245215215
Wild Goose Storage191222210
Central Valley Storage777
Lodi Storage000
Gill Ranch Storage21313
Pipeline Balancing Injection85560
Withdrawal
PG&E Storage
Core and Market Center
209159159
Wild Goose Storage334414334
Central Valley Storage101010
Lodi Storage1065049
Gill Ranch Storage333
Pipeline Balancing Withdrawal0065
Balancing Gas
Imbalance Gas in Storage**3,2193,1873,107
PG&E Total Gas in Storage94,84094,96095,071

*Until yesterday's final figures are released, all numbers 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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