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Dr. John Liou FEMA LMMP Studies - !\ovember 30, 1992 Meeting Minutes P;q~e 2 John is also going t,) call the Soil Conservation Service and ask how much affect the 1937 flood has on peak: discharge detemrination. Love & Associates, Inc. will obtain a copy of the most rece:nt USGS Open File Repon to check the regional analysis equations. - The SOO-year dischl:rge will be determined using a log-normal curve, not a Gumbel frequency analysis. The HKM HEC-2 mo:iel will be used for the hydraulic analysis, Love & Associates, Inc. will prepare a letter to the low-bid surveyor requesting that cross sections be surveyed up and downstream of the HKM study limits within the City of Billirlgs and to spot check a couple of the HKM cross sections. We will also prepare a letter to the county requesting them to survey cross sections outside the city llimits. If more money is needed for the survey within the city limits, John Liou will authorize the additional funds. J<iverdale. Utah: Love & Associates, rnc, will prepare a letter for survey bids. OnJiy the channel portion of the cross sections will be surveyed. The overbank elevation will be taken from an existing HEC.2 modeL The letter to the survl~yors will state that the daMn to be used should match that of the Flood Insurance Study. John Liou will suppl'! a copy of the FIRM and FBFM maps for the City of Riverdale (City) to us. . We are still waiting for written approval of the additional $2,000.00 conuibution from the City for field survey of the Weber River. . John Liou will sup~ly us with documentation regarding m:w FEMA flood zone designations for areas behind levees. - We will check the hydrology (QI00 = 7,000 cfs) for reasonablem:ss. .cooper Slolll:h: , We are currently waiting for an up-to-date working SWMM model for the Cooper Slough basin. . Upon receipt of that model we will continue our hydrologi,; analysis of combinulg our generated hydrographs to the Cooper Slough SWMM model. The~ Cooper Slough model will be changed to a l-l1our storm. . For the hydraulic analysis we will tie the Cooper Slough floodplain to the Boxelder floodplain (through 1.25) in the study reach. We will !lot, however, continue the floodplain upstream of Vme Street unless we receive additional funding from the: County or the State.