NOTICE DATE: October 9, 2014 NOTICE TYPE: W-A100914-01 Operations SHORT DESCRIPTION: Implementation of maximum shadow price for an irresolvable constraint in SCED INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: October 9, 2014 LONG DESCRIPTION: On October 9, 2014, ERCOT is implementing a modified maximum shadow price for a constraint that was found to be irresolvable per the criteria defined in Section 3.6.1 of the business practice document, "Setting the Shadow Price Caps and Power Balance Penalties in Security Constrained Economic Dispatch." The contingency/constraint pair and maximum shadow price (set in accordance with Section 3.6.2 of that same document) are as follows: Contingency Name Constraint Name Description Maximum Shadow Price SLA_RIO8 HARLNS_OLEAND1_1 Loss of the 138 kV line from Las Palma to Rio Hondo overloading the 69 kV line from Harlingen #1 - Oleander $2,000.00 ADDITIONAL INFORMATION: The business practice document is posted under Key Documents on the Real-Time Market webpage<http://www.ercot.com/mktinfo/rtm/>. CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask]<mailto:[log in to unmask]>. If you are receiving email from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com. sa