GRAND JUNCTION – Calls for residents to voluntarily reduce their water usage during this year’s drought and mandatory restrictions in some parts of Mesa County have failed to get results.Earlier this month, Grand Valley domestic and irrigation water companies asked customers to conserve water whenever possible.Redlands Water & Power Co. has already ordered an alternating watering schedule for thousands of irrigation customers because there was not enough water running through its hydroelectric-powered pumps for them to be able to get water to all its customers.According to the Grand Junction Daily Sentinel (http://bit.ly/NBuM9q ), some customers are now using three times as much water than when the pleas were issued.