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Logan River Observatory expands gauges, telemetry and tracer studies to give managers more real‑time data
Summary
Beth Nielsen of the Logan River Observatory described new gauging stations, telemetry repeaters, USGS partnerships and tracer studies that improve understanding of flows and subsurface connectivity across the Logan and Bear River tributaries.
Beth Nielsen, co‑director of the Logan River Observatory, told the Bear River Watershed Council the observatory has expanded flow and water‑quality monitoring across the Logan River watershed and into adjacent tributaries to provide real‑time data for researchers and water managers.
The work matters because the new gauges, 15‑minute diversion loggers and added telemetry will give managers more precise inflow and return‑flow information for Cutler Reservoir and other infrastructure, and tracer studies are revealing unexpected subsurface connections that affect source‑to‑spring pathways.
Nielsen summarized recent additions: new stations at DeWitt Springs Overflow, the Logan River at Tenth West, Blacksmith Fork sites, and a newly operational Little Logan return flow gauge located near the Larski Lake development. She said the Division of Water Rights funded several of the new stations and that the observatory is working with the U.S. Geological Survey (USGS) to reactivate and install long‑term stream gages, including the Bear River at Smithfield and upcoming USGS sites on Cub River and Summit Creek.
The observatory has added 15‑minute data loggers at many diversion locations, installed new repeaters to transmit canyon data, and intends to make most gauges available in near real time through an updated Logan River Observatory website. Nielsen asked council members to take a short survey about what quick‑access plots and station groupings would be most useful to local water managers.
Beyond telemetry, the observatory has run dye tracer studies to map subsurface karst flows. Nielsen described a tracer that was injected in Sink Hollow and showed up at Swan Creek Spring — a result she said demonstrates how water falling in one place can reappear quickly at springs some distance away. When asked what was “the scary part,” Nielsen explained the practical risk: some surface locations that receive contaminants or spills are connected rapidly to springs and drinking‑water sources. She said, “some of the connectedness that’s unexpected … that’s where it gets a little bit scary.”
Nielsen encouraged staff and managers to request data directly if they need it before the public interface is finalized and noted that the observatory will continue to coordinate with USGS, Fish and Wildlife Service, Trout Unlimited and local water districts on funding and station siting.
