Alberta Environment and Parks publishes data on Alberta's River Basins. Their website can be found by following the link below:
The St. Mary Project, including TID, is within the Oldman River Basin. We receive our water from the Waterton, St. Mary and Belly Rivers. Snow pillows are tracked to provide an indication of the water available in our natural "mountain reservoirs". Akamina snow pillow is in the Waterton River headwaters, Flat Top Mt. is in the Waterton and Belly River headwaters and Many Glacier Mt is in the St. Mary headwaters.
Links to the Water Supply Outlook, Water Management Reports and various other Maps and Data Summaries are also available from this site.
This information is summarized for us and provided weekly from Water Management Operations (part of AESRD) to assist us in managing our water supply. Alberta Agriculture and Rural Development (AARD) provides a summary each spring that provides a statistical analysis of the available water to inform our decisions regarding water allocation.