The Imperial Irrigation District Board acts like it is in charge of 3.1 million acre-feet of Colorada River water by way of perfected rights. River rules are implemented to regulate how river water is used and distributed. In general, it is common practice for rules to be ignored, tweaked or exploited.
Currently, there is a familiar game-changing rule of the river referred to as the “use it or lose it” rule. In other words, any allocated water not used by IID (underrun) from the 3.1 million allocated acre-feet passes to the Metropolitan Water District because it has junior water rights status.