City Council Study Session Agenda and Packet 2012 08 06 JT LONGMONT

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City of Longmont Treated Water Demands Greater than Normal As drought conditions occur, water use often increases and raw water availability decreases. Treated water demand projections will be adjusted in accordance with this expected increase. Actual use as the drought progresses will be included in the evaluation of projected water demands. City of Longmont Water Supply Projections for Multi-year Drought Projections As an additional tool in evaluating the current year drought response level, Water Resources Staff will complete a multiple year water supply evaluation. The initial two years of that projection will be used to determine the drought response level for the City. II. Description of Drought Supply Response Levels: Water Resources staff is responsible for monitoring drought indicators and forecasting raw water availability. The following guidelines will assist Water Resources staffand Water Board in advising City Council in determining the appropriate course of action to undertake in varying degrees of drought intensity. These will serve as a guideline only, with the experience and year by year specific details also guiding the City's actions in any given drought scenario. The City Manager, with the advisement of Water Resources staff, will have the power to declare a specific response level in the case of an emergency. Water Resources staff will compare raw water supply with projected demand and monitor the storage levels in Ralph Price Reservoir and the Saint Vrain Creek Basin. If the combination of supply and available storage exceed projected demand by more than 135%, the City's water supply will not be considered in a drought scenario. The City will continue to take water conservation actions at all times, especially during years of below average streamflow. Percent of water savings goal referred hereafter shall be with respect to last year’s actual demand. Sustainable Conservation Level: At the sustainable conservation level the City will continue to implement Best Management Practices to conserve the water resources of the City. Target Water Savings Goal: Sustainable demand management at all times to insure reasonable water conservation practices are followed utilizing best management practices and that the overall goal of a 10% water savings as outlined in the Raw Water Master Plan is realized. This level will include a projection of the following indicators: Storage volumes in Ralph Price Reservoir greater than target levels for the Level One Drought Response in Table B; and Raw water supply availability projections for the next two years at a level greater 135% than of projected water demand. Level One Drought Response Targets: At Level One, conditions will moderately impact the City's supply vs. demand. Target Water Savings Goal: Sufficient demand management, up to 10%, to insure demand does not exceed raw water availability. This level will include a projection of the following indicators: PAGE 4 OF 9 11