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The ratio of the total water demand attributable to in-house uses averages about 56 percent for <br />the municipalities with the remaining 44 percent attributed to outside demand. The average <br />estimate excludes the City of Boulder data point (66 percent in-house demand) and City of Black <br />Hawk data point (85 percent in-house demand). The in-house demand percentage in Boulder is <br />higher than most other municipalities in the basin due to the City of Boulder's compact layout, as <br />noted in the Task 5 Memorandum on the City of Boulder. The in-house demand for Black Hawk <br />is attributable to the very high level of commercial water demands associated with gaming <br />operations. Therefore, Boulder's and Black Hawk's in-house :outside demand ratios are not <br />considered representative of the SPDSS study area. <br />The 56/44 percent split is considered appropriate for all non-key municipalities and <br />unincorporated areas within the SPDSS study area. This ratio is recommended for future SPDSS <br />modeling efforts with the provision that specific user information (e.g., City of Boulder and other <br />key municipalities) can be substituted for average values. <br />It is recommended that in-house demands be modeled in SPDSS as constant over the year <br />(annual in-house demand / 12). Outside demands should be distributed based on representative <br />average monthly bluegrass crop irrigation water requirements. The recommended distribution for <br />outside uses, for the basin as a whole, is presented in Table 4 and illustrated in Figure 4. <br />Table 4 <br />Monthly Distribution of Municipal Outdoor Water Uses <br />Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total <br />0% 0% 0% 9.0% 15.3% 18.8% 19.9% 17.3% 12.8% 6.9% 0% 0% 100.0% <br />Note: Irrigation water requirement for bluegrass at the Greeley weather station. <br />5,000 <br />4,500 <br />4,000 <br />w 3,500 <br />R <br />C <br />•= 3,000 <br />L <br />7 <br />A 2,500 <br />s <br />a <br />0 <br />~ 2,000 <br />en <br />R <br />y~ 1,500 <br />1,000 <br />500 <br />Figure 4 <br />Typical Municipal Water Demands <br />^ In-House Demands i Total Demands <br />Task 66.2 Memorandum.doc Page 11 of 26 <br />Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct <br />