Mayfair Engineering Feasibility Study (EFS)/PER, City of Houston SWMP Program

Located in south Houston, Scientech worked as Prime Consultants to the City of Houston’s Storm Water Management Program (SWMP), for the Mayfair Extended Feasibility Study (EFS) and Preliminary Engineering Report (PER).  The existing 65 acre subdivision consists of roadside ditches and driveway culverts which outfall into Harris County Flood Control Ditch C147-00-00 and South Post Oak Road.  The project consisted of analyzing the existing hydraulic conveyance using SWMM to identify the problem areas.  A 485 node system was developed modeling driveway culverts, ditch flow, overland flow, and street conveyance.  The tail water conditions were modeled to determine the effects of channel’s conveyance of flow.

Given these variables, hydraulic deficiencies were evaluated to develop four proposed alternatives were modeled in order to evaluate the benefit to costs for each alternative.  These alternatives took into account improvements to the subdivision hydraulics, public and private utility upgrades and/or relocations, and roadway paving improvements. The project presented all of the options and costs for each alternative in the PER as well as in the City of Houston TRC Committee to determine if a viable solution is feasible.