LEE GENTRY, P.E.
VICE PRESIDENT – SENIOR DESIGN ENGINEER, DISCIPLINE LEADER FOR STORMWATER
B.S., Civil Engineering
Professional Engineer: Tennessee, Georgia, Alabama, Kentucky, Mississippi, North Carolina, Ohio, South Carolina, and Virginia.
American Society of Civil Engineers
American Water Resources Association
With more than 40 years of experience in civil and water resources engineering, Lee Gentry focuses on LDA Engineering’s hydrologic and hydraulic modeling, stormwater and water resources projects. After his early days as an engineer for a large electric utility company, Gentry served as technical director and water resources manager at an international engineering consulting firm and also vice president and general manager for an environmental consulting firm prior to joining LDA Engineering in 2010. He also served as a special studies instructor in hydrology and hydraulics for a major university.
Gentry has an extensive background in multi-discipline design management; hydraulic modeling of open channel and closed conduit systems including sanitary sewers and peak flow reduction facilities; hydraulic and hydrologic modeling of watersheds and floodplains; and the planning and design of flood control and flood damage mitigation systems. He excels in the planning and design of civil facilities such as reservoirs, dams, pipelines, roadways, stream diversions and drainage systems and works with a wide range of computer hydraulic and hydrologic modeling software. Gentry also handles permitting and MS4 compliance support for stormwater management program design criteria and manual development. He has significant experience in forensic engineering and expert testimony, and professional development training.
Gentry directed development of a dynamic hydraulic computer model of the sanitary sewer system for the City of Oak Ridge in compliance with an Administrative Order from the Environmental Protection Agency (EPA). Key components of the project include gravity pipes, manholes, pump stations and force mains. The model, developed in SewerGEMS Sanitary and calibrated using SWMM for RDII analysis, included an analysis of the effects of flow and rainfall. This model was used to develop a capacity assessment and remediation plan with pipe and manhole remediation and flow equalization basins. Gentry was responsible for the Capacity Assessment Plan, the Capacity Assessment Report and the Remediation Plan.
Project Manager, Fall Creek ETVID Drainageway Stabilization Project, Morristown, Tenn. (2012-present)
To determine channel erosion potential in two primary drainage areas in a major industrial park and evaluate alternatives for stabilizing these channels, Gentry developed a SWMM model of the park’s watershed and drainage system. Based on the model, he prepared a conceptual design, cost estimate and design report for the project and directed final design of the improvements. Key project components included site visits and interviews with state and federal regulators and railroad representatives for permitting and oversight of channel stabilization and construction of a new high-capacity channel.
Stormwater Consultant, Founders Park Stormwater Redirection Project, Johnson City, Tenn. (2012-2013)
Gentry served as LDA Engineering’s lead stormwater consultant for this project, the first step in the master plan to revitalize the City’s historic downtown district. Directing the hydrologic and hydraulic modeling of the project, he helped develop a plan that includes substantial drainage improvements as well as commercial and cultural amenities. Key components of this project include removing 700 feet of an 80-year-old culvert and replacing it with an open stream, five acres of greenway and an amphitheater, plus a new channel and grading to enhance local drainage.
Debi Circle is a residential street that parallels Stubblefield Creek. The street and private property located in the adjacent floodplain are subject to frequent flooding. Gentry leads an LDA Engineering team in evaluating the factors causing the flooding, and reviewing reasonable and practicable alternatives for addressing the flooding issue, including means for reducing the frequency (risk) of flooding in the affected area. The assessment includes a study of the effects of the stream channel profile and shape, and of the existing culverts and bridges, both public and private, on the stream. Since the stream is regulated by FEMA, TDEC, the U.S. Army Corps of Engineers, and TVA , the assessment also includes a review of regulatory issues. The stream is being modeled using HEC-RAS in accordance with FEMA protocols.
Gentry prepared a detailed flood study for Woolen Mill Branch and West Fork Woolen Mill Branch to reflect construction of three regional detention ponds on those streams. The study consisted of HEC-HMS hydrology modeling and HEC-RAS hydraulics modeling, supplemented by SWMM modeling. The study results were incorporated in a LOMR application to FEMA. Gentry also provided technical guidance and procedures to the client for their hydrologic modeling of the detention ponds. The client and the city of Cleveland won a 2009 Engineering Excellence Award from the American Council of Engineering Companies of Tennessee for this project and Gentry’s role was publically acknowledged by the client.
Gentry prepared an estimate of total suspended solids (TSS), nutrient (nitrogen and phosphorus), and fecal coliform bacteria loads from a watershed in its present undeveloped state and in its proposed developed condition using the formulations of the “Watershed Treatment Model” from the U.S. Environmental Protection Agency and the Center for Watershed Protection. The analysis included the effects of a proposed lake and several stormwater quality management practices, including a lake buffer, water quality swales, impervious drainage disconnections, a pet waste management program and a lawn care program. Project includes proposed residential property, a park and a natural green. The stream studied is an unnamed tributary of Beaverdam Creek, a tributary of the Cahaba River which is a 303(d) listed waterway. The study was an integral part of the successful permitting for this project.
Project Manager, Senior Technical Director, Wichita and Sedgwick County Stormwater Management Design Guidance Manual, Wichita and Sedgwick County, Kan. (2009)
Gentry served as manager and technical director for preparation of a manual to guide local authorities, engineers and developers in the design of stormwater management facilities for new development and redevelopment. The manual was prepared in support of the clients’ Phase I MS4 permit requirements. It emphasized the “Integrated Site Design” and “Preferred Site Design” practices for achieving water quality, channel protection, and flood control through the use of engineered post-construction best management practices and low impact development concepts. The manual also provided guidance for the hydrology and hydraulic analysis, and the design of stormwater systems.