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Viewers outline methods and recommended benefits in County Ditch 23 redetermination; residents raise questions about wetlands and municipal runoff
Summary
H2O Overviewers presented a LIDAR‑based watershed and benefits analysis for County Ditch 23; residents pressed the board on wetland attenuation, township tiles and municipal stormwater connections to the ditch.
The Carver County Ditch Authority heard the viewers’ final report for County Ditch 23 (CD 23), including watershed mapping, land‑classification methodology and recommended benefit and damage amounts. Members of the public raised concerns about the effect of wetlands and municipal stormwater on how benefits should be allocated.
Scott Henderson, lead viewer, summarized the process used for CD 23: compile the ditch alignment from county GIS; use LIDAR‑derived elevation data to establish watershed boundaries; ground‑truth culverts, crossings and features in the field; and classify land into four agricultural classes that receive different per‑acre benefit values. Henderson explained viewers also grade the ditch capacity against an engineering drainage coefficient;…
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