I talked with Denver Mountain parks today about Echo lake and the falling lake level. They are aware of the problem and are currently working with CSU to find out what is happening. One of the problems is budget money like most government offices they are trying to find money to fund the study. There are a couple of things they are trying to do now that are less costly that might help solve the mystery of the missing water. Any one on here who is a hydrologist that might want to help, let me know and I will give you the contact at DMP.