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Packet 09062022
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Last modified
9/29/2025 4:27:28 PM
Creation date
9/26/2022 12:32:16 PM
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CM City Clerk-City Council
CM City Clerk-City Council - Document Type
Agenda
Document Date (6)
9/6/2022
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PERM
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Reso 2022-140 CSA Environmental Science Assoc
(Amended)
Path:
\City Clerk\City Council\Resolutions\2022
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Task 4.2 Schedule <br />• Survey plan and technical memo: Six weeks from NTP <br /> <br />Task 4.3 Local Wave Study <br />Concurrent with the topographic and bathymetric data collection, consultant shall deploy a network of water <br />level and wave gauges at the site. Consultant may deploy the instruments in late summer or early <br />fall to collect continuous data through winter and spring. This continuous, multi-month <br />instrument deployment will allow for the observation of a range of seasonal variations in <br />coastal conditions and will offer the greatest chance to measure large storm events. A series of <br />topographic profiles and site observations will be collected shortly after instrument deployment. <br />These profiles and observations may be repeated in February or March after winter storms have <br />occurred, and again in May or June prior to the recovery of the wave instruments. The observations <br />and topographic profiles will be interpreted along with the water level and wave data, allowing consultant to <br />characterize the extent and causes of shoreline change during the study period. <br />Consultant shall deploy a sonic wave sensor in the intertidal zone to measure nearshore wave heights in <br />conjunction with a directional wave buoy at an offshore location, and a pressure sensor installed on the <br />seabed near the buoy that provides coincident water levels. <br />As part of the analysis and application of the field measurements, consultant shall apply a simple wind- <br />wave hindcasting tool (i.e., based on parametric equations and methods derived from coastal <br />engineering guidance manuals) to estimate wave conditions based on local wind measurements <br />at nearby publicly available wind stations. Consultant shall compare the hindcast wave <br />conditions with observed wave conditions during the monitoring period, then shall produce a <br />synthetic time series of waves and water levels using available longer record of wind data sets <br />for the area. Consultant shall generate wind wave statistics using the longer, synthetic time <br />series of coincident wave and water level data to assess the influence of specific events on the <br />historic changes to the shoreline, and to estimate the frequency and magnitudes of threshold or <br />"tipping point" events. Consultant shall consider other readily available data and reports <br />pertinent to the studies. <br />Task 4.3 Deliverables <br />• Wave data in digital and graphical formats. <br />• Memo summarizing the wave data collection program and an analysis of the wave and <br />water level data, including implications for the project. <br /> <br />Task 4.3 Schedule <br />• 10 months from NTP <br />
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