.i RECORD OF PROCEEDINGS 100 Leaves FORM 50 C. F. HDEEKEL B. B. L. CD. Special Meeting Aspen Planning Zoning August 17, 1972 Meeting was called to order at 5:00 p.m. by Chairman Robin Molny with James Breasted, James Adams and Victor Goodhard. Meeting called to discuss with Mr. Dale Rea, Water Engineer Consultant, and Attorney Kenneth Balcomb water line extensions and their relation- ship to water rights. Dale Rea reported in determining the size of water lines and where lines should be constructed, the first criteria to be considered is the over-all Master Plan for the area. The water master plan map is pre- pared by utilization of all water rights as a guideline. Charles Collins arrived. Mr. Rea further stated in considering a large undertaking of laying a water line, the average is two taps per acre. A 12? line would have 70 to 80 lbs. of pressure and provide 1600 gallons per minute which could serve 400 acres. An 18? water line that is properly 100ped and oriented would serve approximately 16,000 to 18,000 people; if not properly looped would serve only about 9,360. The Barnard line as proposed is not looped or has storage involved with the line. Water lines are develoPed to meet the density as outlined in the Master Plan. Present facilities are adequate to serve the proposed line. Presently using 5 million gallons a day, filter plant is designed for 8 million. Anthos Jordan arrived. Demands for water are impossible to keep up with. A3pen has invest- ed a considerable ount of money already to go as far as 16,000,000 gallons a day. {5,000,000 gallons a day is 25 second feet of water. Water master plan map is prepared to take care of 168.5 second feet of water rights which is what the City needs to preserve. Question was asked if the water table can be determined in an area and the yield. Mr. Rea stated this is based on the water shed of the area and depth of waterfall, a reasonable answer can be determined. Question was asked Mr. Balcomb what are the implications of a community to preserve its water rights. Mr. Balcomb stated to show a need, i.e. planners projections. Reservoirs play a very important part in pre- serving water rights. Denver has planned to the year 2010 to protect their water rights. Sewage has to be planned at the sametime as planning for water. General law says that if you haven't done any- thing within 10 years, you have abandoned your water rights. Legislation relating to base of origin has been worked on for 22 years and has not passed yet. Legislation of this sort may not be needed as 5 million acre feet of water has to stay within the State, also Federal government is working on legislation relating to rights in national forests having to remain. Question was raised as to limiting growth with water. Mr. Balcomb stated that when big industry comtemplates moving into an area, they will contact the City as relates to water. When private individuals - RECORD OF PROCEEDINGS 100 Leaves FERN 50 C. F. HOECKEL E. B. a L. '20. ?pecia1, Z, 8/17/72, continued. move into an area, they expect to be served water, will not question prior to moving into an area whether there are sufficient water rights. Water will not control growth, people are going to come anyway. The Citys job is to plan for them. City will never dry up Castle or Maroon Creeks. Do need off stream storage for Castle and Maroon. Store the water rights and then when the river becomes low, use the Water to balance the river. Eventually if the City does not use the water and cannot show a use, the State Engineer will say put it back in the river and it would go up for grabs. Water rights cannot be leased. City does not have to serve someone outside the City even if a line goes throughlis prOperty. Meeting adjourned approximately 6:00 p.m. by motion made by Breasted and seconded by Adams. D?Iku-y-g turf/rt). anw~~LOrraine Graves, secretary .. WATER SUPPLY Mill TREATMENT AIRPORTS, BUILDINGS AND BRIDGES IRRIGATION. RESERVOIRS AND DAMS SEWAGE AND TREATHENT DALE H. REA ., CONSULTING ENGINEER mun-3 IEPURTS 2200 CHENANGO MD SPECIFICATIUNS or cousmucnou COLOMDO 50120 we suaumsuou mo TEL. 794-3446 TEL 794-3546 August l8, l972 Hr. Herb Bartel City-County Planner City Hall P.0. Box Aspen, Colorado Dear Mr. Bartel: In accordance with requests from members of the Planning and Zoning Cmission and Water Department,. we present herewith sane abstract hydraulic flow considerations. Please keep In mind that only experienced hydraulic engineers can relate them to specific projects after considerable time spent In planning and design. Amounts of flow In pipes are governed by Diameter of pipe type of lining and make of pipe length of the plpeiine the pressure head causing flow, etc. The pipeline size to Woody Creek in addition is governed by storage, looping, use of pressure reducing valves area to be served population, elevation in altitude of property relative to pipeline, etc. Flow characteristics Dla Velocity Loss Head gar 1,000 ft. Flow l2? S?lsec i5' l900 S'lsec ##00 6'/sec 7' 7500 9pm Report to City of Aspen in Decemberls?ll Consumptive use per tap max 2100 gal/day Consumptive use per tap min i800 gai/day Use l800 gel/day for Aspen Denver area uses lhho gal/day 5. Flow Ratios Peek Day Demand - 1800 galfday - 1.25 9pm? Peak Hour Demand - 2880 galfday - 2.6 Peek lnstaneous Demand - 2.56 - #500 gal/day - 3.19 9pm 6. Capacity in'Teps Using an unlooped main with no storage and keeping in mind the main will have-to be sectionallzed with pressure reducing valves the pipeline must satisfy the-lnstaneous demand if there is to be no pressure drop. Fran item and 6. the capacity of the pipeline is as follows: l2" . 3.19 - 600 Taps l8" - than 3.l9 - l380 taps I 7500 3.!9 - 2350 taps If reasonable pressure drops are allowed and other factors are averaged out. but without loops and storage, it may be possible to use the 2 criteria of maximum hour. These results are: 132; A nggietion 950 3,h20 l8" - 2 - 2200 7,900 - 7'00 2 .- 3750 13.500 Sincerely yours, ?we Dale H. Rea, Consulting Engineer DHR/erc c/c Hr. Leon A. Wuri