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<br />STEP 8 <br /> <br />APPLICANT SURVEYS CROSS-SECTIONS <br /> <br />The applicant and floodplain administrator shall determine the required <br />number of crosssections using the following guide. <br /> <br />When the following conditions exist, the recomml~nded guide is: <br /> <br />. For a proposed single structure on a flat site, one cross-section can be <br />used" <br /> <br />. For a proposed single structure on :i steep site, at least two cross- <br />sections are needed. <br /> <br />. For two or more proposed structures, at lea:.t thr.~e cross-sections are <br />needed. <br /> <br />- One cross section through the improvement <br /> <br />- One cross-section upstream of the improvement <br /> <br />- One cross-section downstream of the improvement <br /> <br />. More cross-sections may be needed when there are several hydraulic <br />features or significant .:hanges in th.~ channel shape, valley <br />shape, stream gradient, and long stream reaches. <br /> <br />All cross-sections should be oriented perpendicular to flood flows <br />(not just low flows). <br /> <br />All cross-sections should be field surveyed and tied to a <br />recoverable assumed benchmark (e.g. curb, bridge abutment, <br />foundation, etc.) <br /> <br />For these types of stream rr:aches it is recommended that a BEe 2 <br />analysis be performed as part of a floodplains study, <br />