The proposed project infrastructure would involve construction of 8 catch basins, 30 manholes and approx 2.3 mi of underground storm drainage conveyance pipelines. These proposed facilities would reduce localized flooding by collecting storm water runoff from 277 acres of watershed consisting of both developed and planned commercial and residential properties. Additionally, an interconnection with the existing undersized Smothermon Park basins (joint use recreation sports fields and retention basins serving a separate 460-acre watershed) will help relieve inundation of the sports fields at the park during smaller storm events (up to a 5-10 year event). Based on the hydraulic design of the collection and conveyance system, the storm drain pipelines would range in size from 18-in to 48-in in diameter. The catch basins, manholes and pipeline alignments would be located within the existing road ROWs, eliminating the need for easements or additional roadway dedications.
The proposed drainage and flood protection infrastructure would be constructed along Sycamore Rd, Comanche Dr, Walnut Dr, and Meyer St. A drainage basin will be constructed west of Comanche Dr.
Notice of Exemption
Type, Section or Code
Reasons for Exemption
Minor alterations, repair, maintenance and rehabilitation of the existing public road surface. The project involves no or negligible expansion to existing use.
Consists of minor public alterations to land which do not involve the removal of healthy, mature, scenic trees. Minor alterations to land including grading, minor trenching and backfilling, which would occur as part of the underground storm drainage conveyance pipeline and associated retention basin and related facilities.