Engineer tells board Crown property contributes to downstream flooding; trustees debate which metric should govern TIF obligations

At length during the staff-report portion of the meeting, the board questioned DEI's engineer, Michelle, about whether the Crown development would alleviate downstream flooding and what metric the village should use to judge mitigation under the TIF agreement. Michelle summarized the technical review, saying the property does contribute to downstream flooding and that the TIF statute "does not have clear engineering metrics on what it is to alleviate flooding," so staff had been directed to consult attorneys and the board when metrics were unclear.

Trustees pressed on whether the King County stormwater ordinance should be the controlling standard. Michelle explained that the King County ordinance was one defensible option during the original TIF development discussions and that consultants raised the county standard because it provided parameters. She told the board that short-duration, extreme rain events in early July were exceptional and that some standing water at incomplete construction sites could reflect temporary conditions prior to final stormwater improvements. The engineer reported permit-related follow-up: the developer had performed cleanup, and the firm and village staff had contacted the homeowner who reported water intrusion; Michelle said she had asked the developer and other agencies to follow up directly with that resident.