Particulate physicochemical data at a fish hatchery in Puyallup, Washington, September 2023

Particulate samples were collected from a fish hatchery in Puyallup, Washington, September 18 – 20, 2023 during late summer, low-flow conditions in the intake creek. Settled solids were collected from a retention pond and from the incubation room trough. The trough solids likely had been deposited during storm events the previous winter. A third sample was collected in the incubation room, using a continuous flow centrifuge (Conn et al., 2016) to capture suspended particulate material from approximately 700 L of flow-through water over three days. Small particulates escaping the centrifuge were captured on 0.45-micron glass fiber filters. Samples were analyzed for: grain size distribution, percent total carbon and nitrogen, stable isotopes of carbon and nitrogen, carbon-to-nitrogen ratio, mineralogy by x-ray diffraction, and determination of major, minor, and trace elements. Because of mass limitations, only the trough sediment was analyzed for all parameters and other samples were analyzed for a subset of analyses based on available mass and analytical capabilities. Three water samples also were collected - from the creek intake, the retention pond, and the incubation room – and analyzed for suspended sediment concentration and particle size distribution. The water results are available in the USGS National Water Information System (U.S. Geological Survey, 2024) under the sites: USGS 12102080, USGS 471216122203900, and USGS 471217122203900. Referenced citations: Conn, K.E., Dinicola, R.S., Black, R.W., Cox, S.E., Sheibley, R.W., Foreman, J.R., Senter, C.A., and Peterson, N.T., 2016, Continuous-flow centrifugation to collect suspended sediment for chemical analysis: U.S. Geological Survey Techniques and Methods, book 1, chap. D6, 31 p., plus appendixes, accessed April 22, 2024, at https://doi.org/10.3133/tm1D6. U.S. Geological Survey, 2024, USGS water data for the Nation: U.S. Geological Survey National Water Information System database, accessed April 22, 2024, at https://doi.org/10.5066/F7P55KJN.

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