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The first hut was installed on Onondaga Creek during the spring of 2003. A USEPA Grant through the Onondaga Nation and Onondaga Lake Cleanup Corporation (OLCC) provided funds to upgrade the existing USGS gauging station at Dorwin Avenue and acquire and install instrumentation. Housed in the hut is a computer, modem, probe package, and a refrigerated sampler (ISCO® 6712). Creek water is continuously pumped through a 57 L vessel located within the hut using a submersible pump positioned at mid-channel. Flow from the creek to the sample vessel is maintained at or above a flow velocity of approximately 30 cm/s to ensure that suspended solids remain suspended. The water is then returned to the creek. This design allows the probe packages to be protected from adverse conditions (e.g., ice) found in the creek. The ISCO sampler is used to collect both base flow, as well as, storm event samples. These samples are brought back to the laboratory for additional analysis (not available on the probe packages) and for quality assurance. Probe data are typically sampled and stored ever 15 minutes. Baseline ISCO samples are often collected once every a day. Storm event ISCO sampling is often done more frequently, for example one sample per hour. Data from the hut are download via landline telephone and modem.
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