Alternatives Eliminated From Detailed Study Sample Clauses

Alternatives Eliminated From Detailed Study. ‌ Alternative Review; see Appendix A for additional information: Alternative #1: Diversion – located in Cass County, Amenia Twp. – Sec’s 22, 23, & 24 area This diversion alternative was initially carried forward for further study and review. It meets the “Purpose and Need” by providing a certified level of flood protection to the residents of Amenia and allowing residents to be exempt from purchasing federal flood insurance. The diversion takes approximately 50% of the flows in the Rush River just upstream of 154th Ave and discharges the flows back into the Rush River downstream of Highway 18. This alternative was later eliminated due to a number of factors including downstream impacts, impacts to areas designated as prime farmland or prime farmland if drained, wetland concerns, and costs. On-site storage was considered to mitigate downstream impacts; however, the addition of storage required, plus the large diversion channel and new bridges, would have significantly exceeded other alternatives in costs. Alternative #4: Levees around the south side of city of Amenia – Cass County, Amenia Twp., Sec’s 23, 25, & 26 The project team noted that this alternative does not meet the “Purpose and Need” because it does not provide certified flood protection for the city. This alternative was not chosen for any further review or study. Alternative #5: Widen the Rush River channel in Cass County – Amenia Twp. – Sec’s 23 & 24 (this area was not improved with previous legal drain work) Channelization of existing natural waterways and flowages (floodway): This alternative was deemed not acceptable because it would likely cause adverse downstream impacts unless an impoundment is incorporated downstream of the channel work. This strategy, as a stand-alone alternative, was not carried forward for further analysis. In addition, the combination of channel improvement and an impoundment are not considered socially acceptable. Alternative #6: Widen and straighten the Rush River channel in Cass County – Amenia Twp. – Sec’s 23 & 24 (this area was not improved with previous legal drain work) The project team noted there would be some environmental concerns with this alternative, as well as potential downstream impacts. As a stand-alone alternative it did not meet the “Purpose and Need” and was not carried forward for further review or analysis. In addition, the combination of channel improvement and an impoundment are not considered socially acceptable. Alternative #7: Widen the br...