Imbalance advisory through April 2014
Public Service Company of Colorado, an Xcel Energy Company
March 20, 2014
IMPORTANT INFORMATION WHICH WILL IMPACT YOU THROUGH APRIL:
This is a follow-up to our March 7th imbalance Notice, to advise our shippers
that end-of-season storage withdrawals coupled with upstream bottom-hole
storage testing will further limit our ability to absorb both under-deliveries
from our customers during colder periods, and over-deliveries during
unseasonably warm periods. This limitation is expected to last through the
end of April.
TO DO:
Shippers – please take greater care to balance supplies with load to reduce
the likelihood of cashout penalties or triggering an under OR over-delivery
OFO. Early action might also reduce the potential of incurring unexpected
spikes in gas supply costs.
Under-deliveries:
 We cannot cover under-deliveries during unseasonably cold day(s).
When these are forecast, avoid the rush on supplies and take action
early to schedule additional volumes to cover your flowing gas needs.
Don’t count on pulling gas from an imbalance bank, as we may not
have sufficient gas to cover your shortage on those days.
Over-deliveries:
 We cannot absorb significant over-deliveries during warm periods –
particularly those falling on weekends when loads are diminished.
When these are forecast, reduce nominations to avoid over-deliveries.
Don’t provide extra payback gas during these days, as we won’t have
storage injection or sufficient gas loads to absorb the over-delivery.
Weekends/Monday nominations:
 Major weather shifts forecast during a weekend create challenges for
our shippers. Remember to look forward to Monday and if a brief
arctic event is scheduled, use your best efforts to increase nominations
if necessary when making your nominations on Friday.
For additional tips on minimizing your balancing risks during this period,
please review the March 7th “Storage Low – Managing PSCo Noms” notice,
which is available under the Announcements section of our gas transportation
website.
As I’ve stated before, we do understand that managing nominations and
imbalances can be challenging during the spring shoulder months as storage
and our daily balancing flexibility is reduced. Please contact Donna Woods
(303-273-4826) or Sharon Gordon (303-273-4724) who are here to help if
you have questions or concerns and need assistance.
We appreciate your attention to this matter and would like to thank you in
advance for your cooperation.
Ken Buys
Manager, Gas Control