Charges In Case of Meter Failure. 1. Should any meter fail to measure accurately the water passing through the meter, the charge for water used during the time the meter is out of service will be based on Portland’s reasonable estimates of the volume of water supplied based on usage patterns and statistics for prior periods. Portland will use the best available data, including but not limited to water meter, SCADA, or other monitoring data provided by Purchaser to inform Portland’s estimates of water usage in the event of a meter malfunction.