Summary of Floodplain Impacts

Date

November 25, 2019

Project ID

LOR-Sheffield Lake TLCI (PID No. 110386)

Floodplain Affected

Day Ditch

Description of Project

This project will construct a segment of a 28-mile lakefront multimodal network. Specifically, this project consists of construction of an 8′ wide concrete sidewalk from Lake Breeze Road to the existing concrete sidewalk approximately 130′east of Brookside Trail. The project also includes installation of Rectangular Rapid Flash Beacons ( RRFBs) at two pedestrian crossings on U.S. 6, traffic control at side roads, and seeding, mulching, and lawn restoration.

Why must this project be located in the Floodplain?

This project is completing a segment of a 28-mile lakefront multimodal network. Omitting the section of sidewalk that crosses over the Day Ditch floodplain would result in an approximately 90-foot gap in what will eventually be a 28-mile network for multimodal use. 

What alternative sites were considered, if any?

No alternative sites were considered. The purpose of the project is to complete a segment of what will become a 28-mile multimodal network. Omitting the section of sidewalk that crosses over the Day Ditch floodplain would result in an approximately 90-foot gap in what will eventually be a 28-mile network for multimodal use.

Were any mitigation measures utilized on this project? If so, please describe.

The City retained professional design services to prepare a Hydrologic and Hydraulic Study (H&H Study) of Day Ditch for its entire length throughout the city of Sheffield Lake. As part of this H&H Study, it was determined that the 100-year flood elevation at the FEMA cross section located within the limits of this project is 580.14 (which is lower than the 584.8 100-year flood elevation shown by FEMA). Therefore, no mitigation measure are being utilized on this project since the elevation of the proposed sidewalk and expected excavations limits will be above the 100-year flood elevation indicated in the H&H Study.