Discuss, consider, and take appropriate action on a Contract Amendment No. 1 to the Flood Plain Maps Update (Atlas 14 Mapping) contract between Williamson County and AECOM Technical Services, Inc. relating to the LRTP Program. P: 583 Fund Source: LRTP and CIP

The item amends the RFQ2572 Flood Plain Maps Update (Atlas 14) contract to add required language from the Texas Water Development Board (TWDB) Flood Infrastructure Fund (FIF) Grant Master Agreement. The amendment also increases the contract compensation cap by $2,191,000.00; increasing it from $1,000,000.00 to $3,191,000.00. 

The additional funds will allow for a subsequent Work Authorization to conduct a study of Williamson County streams and drainage structures as part of the Atlas 14 Mapping project. The project will incorporate the latest rainfall data and result in the development of new floodplain maps, which will delineate the flood risks associated with the streams in the Turkey-Brushy Creek & Middle Yegua Creek HUC 10s. The TWDB awarded Williamson County a grant to fund 50% ($4,649,593) of the study. In Commissioners Court on September 22, 2020, the court approved a 50% local match as follows: $850,000 from CIP and $850,000 from LRTP in years 2021,2022 and 2023.