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Home My WebLink Aboutminutes.apz.19720817 , -' RECORD OF PROCEEDINGS 100 Leaves FORM 'I C. F. HO~CKEL B. B. & LCD. 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 looped 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. Aspen has invest- ed a considerable~ount of money already to go as far as 16,000,000 gallons a day. I~,OOO,OOO 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 playa 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 - 1 - ,-"......,,---~_..~..._.,.., ,./ RECORD OF PROCEEDINGS 100 Leaves FORM!I C.F.IfOECKELB.B.IlL.CO. Special, P & 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. ) / ,,/ . "- V! / V""'.JA'-'~ 9../~ Lorraine Graves, Secretary / DALE H. REA WATER SUPPlY AND TREATMENT AIRPORTS, BUILDINGS AND BRIDGES IRRIGATION, RESERVOIRS AND DAMS SEWAGE COLUCTION AND TREATMENT CONSULTING ENGI NEER 2200 W. CHENANGO L11TlE10N. COlORAOO 80120 TEL 79'.3"6 Tel. 79..35.6 APPRAIW,S AND REPORTS ODICNS AND SPECIFICATIONS SUPElYlSION OF CONSTRUCTION LaD SUBDIVISION AND DEVELOPMENT August 18, 1972 Hr. Herb Barte 1 Clty-County Planner City Hall P.O. Box V Aspen, Coloraclo O...r Mr. Bartel: '---'" In accordanee with requests fran members of the Planning and 20nlng Commission 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. 1. Amounts of flow In pipes are governed by (a) Diameter of pipe (b) type of lining and make of pipe (c) length of the pipeline (d) the pressure head causing flow, etc. 2. The pipeline size to Woody Creek In addition Is governed by (5) storage, (b) looping, (c) use of pressure reducing valves (d) area to be served (e) population, (f) elevation In altitude of property relative to pipeline, etc. 3. Flow characteristics Dla Velocity loss Head per 1.000 ft. Flow 12" 6'/sec IS' 1900 gpm 18" 6'/sec 10' 4400gpm 24" 6'/sec 7' 7500 gpm 4. Report to City of Aspen In Dece-bar 1964 Consllllptlve use per tap INX 2100 gal/day ConslIIlptlve use per tap Alia 1800 gal/day Use 1800 gal/day for Aspen Denver area uses 1440 gal/day .." s. Flow Ratios Puk Day Demand - lSOO gal/day. 1.25 gp.' Peak Hour Demand - 2880 gal/day. 2.0 gpm Peak 'nstaneous Demand - 2.56 x ISOO. 4500 gal/day · 3.19 gprn 6. Capacity In Taps , Using an unlooped main with no storage and keeping In mind the main will have to be sec:tlonallzed with pressure reducing valves the pipeline must satisfy the Instaneous demand If there Is to be no pressure drop. Fra. It. 4 and 6, the capacity of the pipeline Is as follows: 12" . 1900 -:- 3.19 . 600 Taps 18" · 4400'; 3.19 . 1380 taps 24" . 7500 t 3.19 . 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 gpm criteria of maximum hour. The se results are: Taps PoPUlatIon at 3.5 per tap 12". 1900 .;. 2 . 950 3,420 . 18" · 4400 ~ 2 . 2200 7.900 24" . 7100 + 2 . 3750 13,500 Sincerely yours, 42efe ;1-/ i;J,,- Dale H. Rea, Consulting EngIneer DHR/erc c/c Mr. leon A. Wurl