3 Lake

DYNAMIC LAKE CAPACITY A HISTORY OF CHANGE Future Rainwater Connection Realigned Phipps Run PWSA is evaluating active and passive techniques to maximize the has seen a lot of change over rainwater storage capacity of Panther Hollow Lake. By storing high the years. In fact before industrialization in , volumes of rainwater and slowly releasing it downstream after a rain there was no lake at all! Our project intends to add new To achieve the project Wetland Edge event, PWSA can further decrease risk for downstream flooding, vibrancy and functionality to a key park landmark. goals, PWSA needs to Constructed Wetland basement sewage backups, and combined sewer overflows. Berm Late 1700s increase stormwater storage capacity within Panther Hollow CROSS-SECTION Wet Pond Forebay European-Americans begin to settle in the Pittsburgh area with log cabins built in today’s . Lake. Rock Cascade Source: fatherpitt.wordpress.com Typical lake elevation 1889 Schenley Park is dedicated as a public park. WHY ARE WE DOING IT? Accomodations for Future Amenities Early-1900s Early-1910s ■■ To control flows to decrease Path to N downstream risk of flooding and Lake Loop Trail 250 FEET basement sewage backups New Connection Under the Railroad ■■ To improve water quality in the lake SECTION THROUGH THE LAKE INFLOW TREATMENT TRAIN Panther Hollow before the lake was created. Source: Pittsburgh Parks Conservancy THIS PROJECT WILL... ■■ Improve trails around the lake and create opportunities for future Mid-1950s amenities as recommended by the Planned drawdown lake elevation in Parks Master Plan advance of a major rain event The cascade and Panther Hollow Lake were ■■ Improve habitats, biodiversity, and constructed in the early 1900s. The lake included a boathouse and walking trails. riparian ecology Source: Pittsburgh Parks Conservancy ■■ Increase effectiveness of rainwater controls ■■ Decrease rainwater in the combined sewer system IMPROVED LAKE FUNCTION IMPROVED HABITATS IMPROVED WATER QUALITY The lake will be deepened and given a A meandering constructed wetland ecosystem The wet pond forebay will capture coarse ■■ Enable a new stream through vegetated wetland edge to provide riparian will filter finer sediments and naturally process sediment and woodland debris transported Junction Hollow habitats, improve water quality, and create a pollutants carried from park and neighborhood during storms by Phipps Run and Panther floodable lake edge. The wetland edge of streets and lawns to protect lake water quality. Hollow Run before they enter the lake. This The last substantial modification of the lake the lake allows for the lake to have dynamic Walking paths all around the lake will give park protects the lake from damage and ecological was when it was given a modernist concrete capacity, giving PWSA more control over large users an opportunity to see and learn about disturbance while also making the entire lake edge during the mid-1950s. volumes of rainwater during major rain events. riparian ecology. inflow treatment train simple to maintain. Lake elevation during a major rain event 1999 The Parks Master Plan identifies the lake as a priority for local ecology and stormwater management. revision 20181126-1023