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4 <br />San Leandro Baylands “North Marsh” Hydrology and Ecological Opportunities Assessment Proposal <br /> <br /> <br /> <br />ESA staff will conduct topographic surveys2 of North Marsh and Robert’s Landing (Figure 1). A total of <br />two (2) topographic cross-sections will be surveyed spanning the length and width of North Marsh in the <br />northeast-southwest and northwest-southeast directions. In addition, staff will survey the channels near <br />each North Marsh and Robert’s Landing Slough tide gauge for a total of six (6) channel cross-sections. <br />ESA staff will also perform elevation surveys of up to four (4) tide gates within North Marsh to obtain <br />channel and infrastructure elevations. Surveys will be conducted relative to nearby National Geodetic <br />Survey (NGS) control points and previously established ESA control points in the area. <br />ESA staff will establish fixed photographic documentation stations at each tide gauge within North Marsh <br />and Robert’s Landing Slough, and at each tide gate for up to seven (7) stations. Staff will take up to three <br />(3) photos at each photo-documentation station at different angles/viewpoints. Photographs will document <br />channel, marshplain, and tide gate condition. Station locations will be georeferenced and described to <br />facilitate future re-occupation. <br />At the end of the monitoring period, ESA will prepare a brief (3-5 pages including figures) data collection <br />memorandum detailing Task 1 data collection methods, dates, locations, and presenting results. <br />Assumptions <br /> Tide gauge installation and survey cross-section locations will be finalized by ESA and client prior to <br />start of monitoring. <br /> Tide gauge services will be performed by two (2) hydrology staff approximately once every six (6) <br />weeks for up to two (2) visits for the monitoring period. <br /> Site access will be coordinated by the client, including acquisition of keys and codes for locked gates <br />on site. <br /> ESA staff will collect elevation survey data at a maximum of two (2) marsh-spanning cross-sections, <br />six (6) channel cross-sections, and four (4) tide gates within the Project site. <br /> Survey effort is tide- and weather-dependent and may require some lead time to select good survey <br />conditions. <br /> This task does not include analysis or interpretation of the collected data other than normal quality <br />assurance/quality control reviews to assess the quality and accuracy of the collected data. <br />Intepretation of the collected data will be performed under Task 3. <br />Deliverables <br /> Brief (3-5 pages including figures) data collection memorandum detailing the results of tide <br />monitoring, topographic surveying, and photo documentation. The memorandum will include <br />information on equipment/survey locations, a description of field activities, time series data plots, <br /> <br /> <br /> <br />2 ESA performs land surveys and collects hydrographic data to augment traditional surveying services for the purposes of <br />geomorphic interpretation, monitoring of project performance, and other specific uses consistent with Geologic and Landscape <br />Surveys as defined in the Professional Land Surveyors’ Act (California Business and Professionals Code). ESA does not <br />provide traditional land survey services such as property boundaries and maps for general use by others. ESA recommends that <br />these traditional surveying services be accomplished by a licensed, professional land surveyor either under direct contract with <br />the client or as a sub-consultant to ESA. <br />Docusign Envelope ID: 9DB32912-19D0-41E8-ACE8-82408BB907DB