Top of inactive capacity

The reservoir water surface elevation below which the reservoir will not be evacuated under normal conditions. The highest applicable water surface elevation described below usually determines the top of inactive capacity.

1. The lowest water surface elevation at which the planned minimum rate of release for water supply purposes can be made to canals, conduits, the river, or other downstream conveyance systems. Normally, this elevation is established during the planning and design phases and is the elevation at the end of extreme drawdown periods.
2. The established minimum water surface elevation for fish and wildlife purposes.
3. The established minimum water surface elevation for recreation purposes.
4. The minimum water surface elevation as set forth in compacts and/or agreements with political sudivision(s).
5. The minimum water surface elevation at which the powerplant is designed to operate.
7. The minimum water surface elevation to which the reservoir can be drawn down using established operating procedures without endangering the dam, appurtenant structures, or reservoir shoreline.
8. The minimum water surface elevation or top of inactive capacity established by legislative action.