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Lasque Tiarc

What is the status of the floodplain assessment on the west side of Mount Vernon?

Vaseline 2 months ago

MOUNT VERNON — Currently, the city is undertaking two activities to evaluate the floodplain.

One is a short-term effort, the other is a long-term effort.

In the short term, the city will inventory all structures on the west side. The survey includes measuring the height and inspecting each home to determine who is likely to qualify for flood insurance.

The property owner would then apply to FEMA to see if FEMA would remove the property from the floodplain.

Engineering interns have completed seven streets to date. Progress is dependent on weather and personnel.

The long-term effort relates to the dike itself.

Late last month, the city approved the use of $60,000 in American Rescue Plan Act (ARPA) funds for H&H modeling of the Kokosing River. H&H refers to hydrological and hydraulic.

H&H modeling determines when water can exceed a dike. The last H&H was performed in 1979.

The city is working with Stantec Consulting Services to complete the H&H modeling.

The analysis includes six separate levee sections, extending from Tilden Avenue to the Kokosing Gap Trail parking lot on Lower Gambier Road.

Stantec will use information from a gauge on the right bank of the river, approximately 300 feet south of Tilden Avenue.

Three primary tributaries enter the Kokosing as it winds through the city: Dry Creek, Delano Run, and Center Run.

The tributaries are downstream of the gauge at Tilden Avenue. Stantec will calculate the increased flow they add to the river using standard methods.

This phase of modeling does not include the tributaries themselves.

Stantec estimates that the H&H modeling will take four months. No start date has been set.

The H&S analysis is the first step in determining a future dike project.