Tulsa-Anhydrous ammonia volumes on Magellan Midstream Partners LP’s pipeline were up 35 percent during the first quarter ending March 31, 2010, to 167,000 st compared to the year-ago 124,000 st. Pipeline operating margins were $1.1 million on sales of $5.1 million, versus the year-ago $116,000 on sales of $3.2 million. Magellan said revenues increased primarily due to higher volumes, as the 2009 period was negatively impacted by operational issues at customer production facilities. Expenses increased during the recent quarter to $4 million due to additional environmental accruals, versus the year-ago $3.1 million. Magellan-wide, net income was up 57 percent, to $64.5 million ($.60 per diluted share) on sales of $329.7 million, versus the year-ago $41.2 million ($.30 per diluted share) on sales of $212.9 million.