2008/12/17 Council Agenda Packet

Situ LT 500 units, or similar) installed within the site (5 gauges) and in Union Slough near the north breach(1 gauge) for one month(June 2009 or December 2009) in order create a data set suitable for future modeling efforts related to the bridge scour issues. After data collection is accomplished, we will remove the gauge housings and return the rented gauges. This data will be analyzed and compared to the year 1 data and reported in the hydrology section of the Year 2 Monitoring report (Task 6). Task 3. Water Quality Monitoring Year 2 [CF Jones & Stokes will utilize a canoe and a GPS unit loaded with the UTM coordinates to relocate the same six water quality stations within the site and the one station located in Union Slough utilized during the year 1 monitoring. As during year l monitoring, we will collect the samples at high tide twice during spring high river flow periods (i.e. April to May, depending on rainfall and runoff conditions) and twice during summer low river flow periods (i.e. August to September, depending on conditions), with samples collected approximately 2 weeks apart. Water temperature, salinity, and dissolved oxygen will be measured at three depths (approximately 1, 3, and 5 feet below the water surface) during high tide using a YSI hand-held meter, or equivalent. Because the site does not drain at low tide, and thus water may stagnate in the site, water quality conditions are of concern, particularly during periods of hot summer temperatures. We would therefore also collect samples at low tide twice during the spring(i.e. April to May, depending on rainfall and runoff conditions) and twice during summer low river flow periods (i.e. August to September, targeting the warmest days possible), with samples collected approximately 2 weeks apart. Water temperature, salinity, and dissolved oxygen will be measured at the surface, middle, and bottom of the water column during low tide using a YSI hand-held meter, or equivalent. This data will be qualitatively analyzed and compared to the year I data and reported in the water quality section of the Year 2 Monitoring report (Task 6). Task 4. Fisheries Monitoring Year 2 ICF Jones & Stokes will sample juvenile fish use of the site on 3 consecutive days in May 2009, timed to coincide with juvenile salmon use of the lower Snohomish River Estuary before migrating to Puget Sound. A team of 2 biologists will seine or block net fish in the 4 :.ti Year 2 Monitoring Smith Island Restoration revised December 4,2003