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Killarney board to add monthly‑average benchmarks to lake‑level reports after telemetry data review
Summary
Board members asked staff to add month‑by‑month average elevations to lake reports and to rely on recent telemetry and storm forecasts, rather than calendar triggers alone, when activating flood‑management controls.
The Lake Killarney Advisory Board voted July 1 to ask staff to include monthly average lake‑level benchmarks in future elevation reports and to use those data as a reference when considering any deviation from the city's hurricane‑season drainage plan.
Board member Dave Dickerson said relying on seasonal averages and the board’s new telemetry readings would help avoid opening drainage controls for storms that do not materialize. “The lake elevation is one of the items that everyone who owns lakefront property cares about,” Dickerson said, arguing for a simple display that shows whether the lake is significantly above or below typical levels for a given month.
City lakes staff confirmed that high‑frequency telemetry was installed in August 2024 and provides finer data than earlier monthly sampling. “Our telemetry was installed in August 2024,” staff said, adding that the system allows staff to benchmark current readings against historical monthly averages. Staff agreed to add those monthly averages to the elevation slide used at future meetings.
Staff also described how the existing flood‑management guide uses storm‑outlook criteria — specifically whether a seven‑day cone of an approaching storm touches Central Florida — as the trigger to pull weir boards and activate drain collars, rather than an elevation threshold alone. Staff said that approach is time‑ and forecast‑driven because actions taken in advance of predicted storms can leave the lake unusually low if heavy rain does not arrive.
Board members seeking more context asked staff to provide a simple month‑by‑month comparison at each meeting that would show whether the lake is above or below a 5‑, 10‑ or multi‑year average. Staff said they would prepare the requested slides and benchmark averages for future packets.
The item concluded with the board directing staff to add the averages to the lake elevation presentation for reference; no formal change to the hurricane guide was made at the meeting. The board will revisit any proposal to change established flood‑management procedures if future discussion shows that a data‑driven exception is warranted.
