First Call reports analysts' consensus estimates for AGL Resources third quarter (ending June 30, 2000) at 21�/share, current fiscal year estimate at $1.12, and fiscal year 2001 at $1.20. The company said the improved earnings outlook is driven primarily by aggressive cost management, system modernization, and customer-base growth. It said the improvement excludes gains the company will record on the US Propane-Heritage transaction reported June 15, 2000 (OGJ Online, June 16, 2000). AGL Resources is scheduled to report third quarter earnings on July 27, 2000. Calpine Corp.'s 500-Mw natural gas-fired Hidalgo Energy Center began commercial operation June 14. In March, Calpine reported it had purchased a 78.5% interest in the $250 million plant, located in Edinburg, Tex., on the border with Mexico. The Brownsville Public Utilities Board holds the remaining 21.5 %.