Res 2021-064/approving Substantial Amendment No. 10 to the Community Development Block Grant-Disaster Recovery (CDBG-DR) Action Plan

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. The Blanco Gardens north sidestorm sewer system drains Bugg Lane : By adding a new storm drain system to Clarewood Dr. with a connection Low Moderate IncomeLow Moderate Income As part of Blanco Gardens, this area is influenced by the Blanco River Approximately 420 properties would benefit during local rainfall events up to 25-year Approximately 76 properties would benefit during local rainfall events up to 25-years with alley/easement between Barbara & Conway.(Infrastructure Categories C. Road Systems & Bridges and F. Utilities)Benefits:frequencies with the new storm drain system. Mobility will be improved due to decreasedponding in the roadways, and this fairly small system provides relief to a majority of the project area without having to remove and replace what is there today. The project provides LMI benefit, health and safety benefit, helps long-term recovery, and enhances hazard mitigation.National Objective:The Clarewood/Barbara Drive area is located in San Marcos, TXon the east side of IH-35 at theintersection of Highway 80/Hopkins Street and is generally bounded by Highway 80 on the north,IH-35 onthe west, Clarewood on the east,and Bugg Road on the south. The area is primarily multi-family residential and commercial with businesses located along IH-35, Clarewood, and Highway80.The area is almost entirely located within the 100-year flood plain with the exception of a fewhigher properties along IH-35. The area is significantly affected by the Blanco Riveroverflows inevents 20-yearand above, as well as backwater from the Bugg Road and Highway 80 storm drainsystems when the Blanco River is high. The area falls within 1 census tract which is 87.99% low-to-moderate income.Existing Infrastructure:and River Road with a dual 48-inch outfall to the Blanco River. There is no existing system on Clarewood Drive.Drainage issues:overflows. During local rainfall events, the existing Bugg Lane storm drain system is undersized and does not meet currentthe 25-year City design Criteria. The project area is fairly flat, Bugg Lane topography drains towards IH-35 instead of the Blanco River outfall, and drainage along Barbara Dr. from Wendell toBugg Lane is not well defined. Clarewood Drive has no existing storm sewer system, and coupled with the Bugg Lane topography, the area experiences significant roadway ponding in the areas that cannot drain when the system is inundated Proposed Infrastructure to both the Bugg Lane system and with a connection to the existing Highway 80 ditch(where ponded water currently flows), the system will meet criteria, and runoff will be captured bythe storm drains and ditches instead of ponding in the roadway. Barbara Drive will be regraded to drain to Bugg Lane for adequate drainage.The project will require coordination with TxDOT to outfall into the Highway 80 ditch and some addition of storage volume as detention in this ditch may be required.Benefits:the new storm drain system. Mobility will be improved due to decreased ponding in roadways, and both Clarewood and Barbara Drives will have adequate drainage not available today.The project provides LMI benefit, healthand safety benefit, helps long-term recovery, and enhances hazard mitigation.National Objective:Currently for flood events greater than a 20-year and larger, a portion of the river floodflow exits theBlanco River channel and proceeds uncontrolled across the Blanco Gardensarea to the west,eventually entering the San Marcos River upstream of the junction with the Blanco River. Thisoverflow creates the highest concentration of damages in the City. There are numerous areas intheBlanco River overbank that allow this overflow to occur. The uncontrolled overflow impacts1census tract which is 87.99% low-to-moderate income. 3.Clarewood/Barbara Drive4.Blanco Riverine Project