2019.02.04 CC Packet - Laserfiche WebLink

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Vill. IMPROVEMENT PROJECTS — DESIGN CONSIDERATIONS A number of potential improvement projects have been identified for potential inclusion in the City of Hugo or the Rice Creek Watershed District Capital Improvement Plan. Generally the projects included in this list were found to be feasible to construct based on the following considerations: • Property owner may be receptive to work on property • Soil suitable for BMPs • Proposed land use practice compatible with BMPS • Topography in area suitable for cost-effective construction of BMPs • Flood plain considerations will not inhibit the ability of BMPs to be constructed • Vegetation on site is suitable for BMP implementation • Site suitable for cost-effective implementation of BMPs • Other considerations as identified In addition to the feasibility level considerations listed above, a number of design assumptions needed to be defined for each of the BMPs in order to properly evaluate their cost to construct and water quality benefits. A listing of the design assumptions used for the BMPs considered are provided below: Water Reuse — Irrigation • Typical irrigation rate 1-3" per week • 2-6 acre feet per acre could be removed annually • One pound of phosphorus removed per acre foot of water infiltrated • Average cost for construction: $15,000 per acre irrigated • Annual cost for operation and maintenance: $1,000 per year per system location plus 2.5% of Capital Cost. Water Reuse — Infiltration • Typical infiltration rate of 0.5-l" per hour Based on a single trench 1000' long and having an effective infiltration width of 10', per 1000' section at 1" per hour, this section could infiltrate 80 acre feet in 180 days. CIP for Storm Water Projects Within the City of Hugo City of Hugo, MN WSB Project No. 1687-85 Page 21