Placed into service in 1911, the resulting reservoir has a drainage basin of 16 square miles (25.6 km²) and can hold 14.2 billion US gallons (54,000,000 m3) of water at full capacity.

The reservoir is split into three portions by Putnam County Routes 35 and 38, which cross it with causeways and bridges.

[2] The upgrading and rehabilitation is part of the city's effort to comply with state and federal dam safety regulations.

The nearly 100-foot-tall (30 m) earthen and masonry dam has been resurfaced, a new bridge has been built over the redone spillway and various mechanical items, such as valves, will be replaced.

Recent developments regarding the Croton Falls Reservoir include a significant legal settlement that reduced the assessed value of the reservoir, impacting the surrounding communities, particularly the Town of Carmel and the Mahopac School District.