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Anna Mauss - CWCB June 6, 2011 Page 2 of 4 <br /> <br /> <br />an emergency . Such emergencies may include but are not limited to a well or pump failure, and unforeseen calamities. Should W ell N o. 3 fail, W el l N o. 1 can marginally provide water for indoor use only with the use of storage to meet peaks for a limited time and would likely require watering restrictions to be imposed on all customers . If W ell No. 1 were operating alon e , it would not be capable of providing water for outdoor use, or to make up water used out of storage for irrigation or fire flow use in sufficient time . Should W ell N o. 1 fail, the system would still be operational; however, some restrictions may need to be imposed during peak use a nd summer months. The existing storage tank was sized to satisfy peak summer and fire flow demands. The summer time storage volume is filled by the production capability of Well No. 3. There are plausible situations in which the system could not meet p eak demand and fire flow protection. One such situation is if Well No. 3 were offline for an extended period of time during the summer (due to failure or lengthy maintenance), the storage tank’s volume could be depleted after approximately one day. Well No. 1 would not be able to refill the tank and meet peak demands and puts at risk fire protection reserves . In the case of a fire, the fire storage reserve would be depleted and Well No. 1 would not be sufficient to provide replacement storag e for the following day without other restrictions . The proposed Lambert Well would help mitigate the shortage in this situation . There is additional concern that because t he wells are located near the margin of the aquifer , they may begin to see well yi eld declines due to dropping water levels and boundary conditions . The District has not been able to complete the regular maintenance on Well No. 3 over the last few years due to the lack of a backup contingency to meet the demand. Well No. 3’s current pump is 6 years old and is reaching the average expected life. By adding the Lambert Ranch Well , it would potentially take the stress off Well No. 3 so that regular maintenance can be performed on all wells . The acquisition of the Lambert Ranch water righ ts will allow the District to drill an additional well which will provide: 1) supplement al and backup water supply for the two existing wells in use by the District; and 2) additional contingency for fire protection for the service area. <br />History of Well 1 <br />Issue: What prompted Well No. 1 redrill? TWSD Well 1 (Permit Number 5984FR) was originally drilled in Ma y 1964 to a total depth of 1257 feet below ground surface and screened in the Arapahoe Aquifer. The average life of a well is approximately fifty years; however , some well casing may deteriorate at a faster rate. In 200 2, TWSD was advised by their consu ltant to replace Well 1 due to deterioration in the casing. Well 1 was replaced in 2003. <br />Existing TWSD Water Rights <br />Issue: Expand original water rights table to incl ude more information . The following table is an expanded summary of the existing TWSD gro und water rights.