Bronx Council on the Arts
Insight Civil Engineering, PLLC, has been subcontracted by LTL Architects to investigate drainage issues at the existing south façade of the future headquarters of the Bronx Council of the Arts, located on East Tremont Ave. The existing stormwater drainage system for the parking lot consists of two trench drains and a dry well/overflow chamber. Based on field investigation, it was determined that the existing system was not functioning properly which was leading to flooding conditions during rainfall events. Insight Civil performed an analysis of the existing stormwater drainage system to determine the cause of flooding conditions in the parking lot during heavy rainfall events.
Recommendations were provided for a new stormwater drainage system in the parking lot area as a solution to the current flooding issue. Insight Civil’s team of civil engineers performed hydrology and hydraulic studies. The existing site drainage was analyzed by using the Rational Method to determine the site runoff rate, and the Manning’s Equation was utilized to determine the existing discharge pipe capacities. The existing drainage pipe capacity was evaluated for compliance with NYCDOB code Chapter 11 Storm Drainage and NYCDEP site connection.
Insight Civil recommended sizing stormwater piping systems to the NYCDEP 5.95 inches per hour rainfall intensity. To reduce the amount of flow to a storm connection, this project site can achieve adequate capacity by separating the roof discharge and the parking lot discharge. Insight Civil recommended making a new storm connection on Benson Street. The new connection will discharge all stormwater runoff from the parking lot directly to the existing 15 inch combined sewer on Benson Street. The stormwater runoff from the roof will continue to drain to the existing stormwater system discharging to East Tremont Ave.
Insight Civil is also responsible for the preparation of grading and drainage, erosion and sediment control, and NYCDEP site connection plans for the proposed drainage network.
Recommendations were provided for a new stormwater drainage system in the parking lot area as a solution to the current flooding issue. Insight Civil’s team of civil engineers performed hydrology and hydraulic studies. The existing site drainage was analyzed by using the Rational Method to determine the site runoff rate, and the Manning’s Equation was utilized to determine the existing discharge pipe capacities. The existing drainage pipe capacity was evaluated for compliance with NYCDOB code Chapter 11 Storm Drainage and NYCDEP site connection.
Insight Civil recommended sizing stormwater piping systems to the NYCDEP 5.95 inches per hour rainfall intensity. To reduce the amount of flow to a storm connection, this project site can achieve adequate capacity by separating the roof discharge and the parking lot discharge. Insight Civil recommended making a new storm connection on Benson Street. The new connection will discharge all stormwater runoff from the parking lot directly to the existing 15 inch combined sewer on Benson Street. The stormwater runoff from the roof will continue to drain to the existing stormwater system discharging to East Tremont Ave.
Insight Civil is also responsible for the preparation of grading and drainage, erosion and sediment control, and NYCDEP site connection plans for the proposed drainage network.