Ammon Foothill - Study_Water Study Update 3.25.22BCP Development – Ammon Development Water Study Addendum 1
2 KA #221128
the residential areas. We anticipate no change to demands for the commercial and school
areas.
Table 1 – Changes to Drinking Water Demands
Estimated Household Demand (unchanged):
Max Day Demand (MDD), gpm per unit 0.37
Peak Hour Demand (PHD), gpm per unit 0.49
Units MDD (gpm) PHD (gpm)
Original Revised Original Revised Original Revised
Village 1 490 452 182 168 239 220
Village 2 845 522 314 194 412 254
Village 3 688 408 256 152 335 199
Village 4 322 554 120 206 157 270
Village 5 - 187 0 69 0 91
Village 6 - 194 0 72 0 94
Neighborhood 1 163 148 61 55 79 72
Neighborhood 2 180 151 67 56 88 74
Neighborhood 3 97 120 36 45 47 58
Neighborhood 4 180 208 67 77 88 101
Neighborhood 5 176 195 65 72 86 95
Commercial - - 1.1 1.1 1.5 1.5
Schools - - 40 40 50 50
TOTAL 3,141 3,139 1,207 1,206 1,582 1,581
*gpm = gallons per minute
3.0 CONCLUSION
The changes to the proposed layout and phasing have a negligible impact on the drinking water
demands for this development. As a result, there is no change to the recommendations for
supply, storage, or delivery capacities found in the original study.
As the location of churches, schools, parks, and the proposed water storage and pumping
facilities are finalized, the proposed drinking water improvements map found on page six of the
original study will need to be updated accordingly. Hydraulically, the same general approach will
apply to pipeline sizing for this new layout: a 14-inch transmission line running the north-south
length of the development, 10-inch supply lines to schools and commercial areas, 8-inch
distribution lines, and a selection of additional 10-inch and 12-inch lines placed to alleviate low
pressures at higher elevations and to facilitate emergency tie-in with the Quail Ridge
subdivision. As noted in the original study, once local streets are platted, adequate system
pressures should be confirmed through additional hydraulic modeling during design of pumping
facilities and before final design of distribution lines.