The Inner Harbor CSO Facility Planning area consists of the North River, Newtown Creek, and Red Hook WPCP drainage areas.

The original facility plan, submitted in January 1993, concluded that CSOs do not contribute to dissolved oxygen and coliform problems in the
open waters of the Hudson River, Lower East River, and Upper New York Bay.
However, in Gowanus Canal, CSOs were found to have a significant impact on dissolved oxygen levels and
coliform concentrations.

Based on these conclusions, the New York City Department of Environmental Protection (NYCDEP) recommended a three-phase plan for open waters, along with a rehabilitation strategy for the Gowanus Canal.

The open waters plan included
regulator improvements, new throttling facilities to maximize the wet weather flows to the WPCPs, and in-line storage to increase CSO capture.

In 2003, Radhi Majmudar spearheaded the structural engineering conceptual and 60% design support services for a new throttling facility at the Manhattan Pumping Station. The intention of this throttling facility was to reduce the magnitude, frequency, and duration of CSO discharges. By implementing throttling facilities, harmful effects of using existing plant inlet gates to control wet weather flows would be eliminated, including high flow velocities that damage plant screens. Operating throttling facilities would enable interceptor storage capacities to be fully utilized and plant flows to be maximized by back flooding the interceptor system.