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I I I I I I I I I I I I I ! I I I I I I CHAPTER III WATER REQUIREMENTS Durango West Metropolitan District No. 1 and 2 presently use about 98 acre-feet (32 Million Gallons (MG)) to serve about 310 units. District No.1 has 135 units and District No.2 has 175 in 1987. At ultimate buildout there would be a total of about 620 units--225 in District No. 1 and 395 in District No.2. The two Districts have independent water sources but have an interconnection, so that they can sell or trade water when necessary. Presently, all of the water is obtained from wells. DISTRICT NO. 1 USAGE District No.1 is served by three wells that produce about 28 gpm. Incidentally, when the area was first developed, one of these wells was expected to produce 200 gpm but now produces less that 10 gpm. The wells are adequate for in-house use in District No. 1 but are not adequate for lawn watering. In the summer, the District restricts lawn watering to once per week. District No. 1 needs additional water immediately to serve the units that are constructed. Luckily, from a water supply perspective, there has not been growth in the District during the last few years or the water shortage would be more acute. District No. 1 presently has 135 constructed units which use about 34.6 acre-feet (11.3 MG) of water per year for an average of 230 gallons per unit per day (GUD). Table III-A shows the average monthly usage for each district for 1985 and 1986. District No. 1 usage is shown in Columns 2 and 3. Column 2 shows the GUD for each month. The GUD varies from 190 to 230 from September to April then increases to 280 to 290 from May to August. The monthly GUD for the summer months are significantly lower than for a normal community. Generally, the summer GUD should be about 150% or greater than the average yearly GUD, but is actually only 125% of the average. The reason for this is the restricted water supply which limits lawn watering to once per week. The low GUD explained by the weather is not faucets run. winter to keep shown for September and October is possibly theory that lawn watering has stopped, and the so cold that people have started letting their Many of the residences run faucets during the pipes from freezing. The first year of project operation would be 1990 when there would be five more units constructed and the associated usage is estimated to increase to about 46 acre-feet (14.9 MG) which is 290 GUD. The water demand in the peak summer months of June, July, and August is expected to increase to 150% of the average GUD, to better match other communities. The average GUD will increase from 230 to 290, so the combination of increased GUD and peak will result in a summer peak water supply that will be - 7 -