Task Assignment Summary

This is a Task Assignment Form (Attachment C) under DEP Contract No. BS135, issued by the Florida Department of Environmental Protection (FDEP) to Mott MacDonald Florida, LLC. The assignment was executed on July 29, 2019, with Michael Layne serving as the contractor representative and Dena Vandlandingham as the DEP Contract Manager. The task assignment pertains to inundation modeling and mapping for three high-hazard potential dams in Florida: Locklin Lake Dam (City of Milton, Santa Rosa County), Holley Lake Dam (near DeFuniak Springs, Walton County), and Juniper Lake Dam (near DeFuniak Springs, Walton County). Key FDEP personnel include Project Manager Tracy Woods and Contract Administrator Dena Vandlandingham, while Mott MacDonald's team includes Project Principal Billy Perry, Project Manager Michael Layne, Project Engineer Chad Bowman, and Principal Engineer Michael Cox from Comak Group, with Lead Engineer Giorgio Tachiev from Comak Group. Dam owners include Joe Cook (Milton) for Locklin Lake Dam, Patrick O'Neill (Holly King Lakes HOA) for Holley Lake Dam, and Neil Branson (Division of Forestry Management) for Juniper Lake Dam.

The scope of work encompasses data collection, inundation modeling, and preparation of Emergency Action Plans (EAPs) for the three dam sites, utilizing HEC-RAS Version 5.0.7 modeling software to simulate dam breach scenarios under sunny day and 100-year storm conditions, as well as ½ PMP overtopping analysis. The contract is structured as a fixed-price task assignment with a total value of $71,106.02, allocated as $26,391.72 for Locklin Lake Dam, $24,465.24 for Holley Lake Dam, and $20,249.06 for Juniper Lake Dam. Compensation is provided on a lump-sum basis with monthly invoicing tied to deliverable completion and FDEP approval. The project execution period extends through October 31, 2019, with an anticipated Notice to Proceed date of July 26, 2019, and projected completion by September 30, 2019. Deliverables include site inspection reports, dam break analysis reports, comparative breach scenario reports, and final inundation maps with evacuation routes, emergency facility locations, and flood contour information, all requiring professional engineer certification.