Most of you are aware by now there is an issue of combined sewer overflows (CSOs) polluting Nine Mile Run. During wet weather, our watershed’s aging combined sewer systems do not have the capacity to handle both stormwater and sewage so they overflow into Nine Mile Run, introducing pathogens, trash, and other pollutants to the stream. We have actively worked to correct this issue through green stormwater infrastructure (GSI) interventions in the upper watershed over the last 14 years, including installing rain barrels and rain gardens and planting over 900 street trees.
Despite all of this effort, however, we still have degraded water quality during and after wet weather. When we developed our 2013-15 Strategic Plan there was one main goal: to reduce the flow of stormwater and sewage into Nine Mile Run.
We understood to achieve this goal we would need to install GSI facilities capable of capturing large quantities of stormwater before it enters the combined sewer system. In 2014, we worked with Matt Graham of Landbase Systems to identify areas in the watershed that have high amounts of stormwater flowing into curb inlets and eventually overflowing into Nine Mile Run. Through detailed analysis, he identified an area in the Homewood neighborhood of Pittsburgh, which is actually outside of the watershed, but is part of the Nine Mile Run sewershed, that contributes over 25 million gallons of stormwater and sewerage overflow to the stream annually during wet weather events.
In case you aren’t familiar, a sewershed is simply a drainage area determined by the curbs, storm drains, pipes, and outfalls that all drain to a common outlet (e.g., Nine Mile Run). It doesn’t match perfectly with the Nine Mile Run watershed boundary because sewersheds often cross the boundaries of watersheds that existed before urbanization.
The Rosedale Runoff Reduction Project (RRRP) is a holistic sustainable stormwater project with the goal to remove all 25 million gallons of overflow entering the stream. We will achieve this by constructing 3 large GSI sites, 40 stormwater management tree pits, 200 Hydra rain containers, and 10 rain gardens.
In October 2014, we were awarded $150,000 from PA Department of Community and Economic Development (DCED) Commonwealth Financing Authority (CFA) Watershed Restoration and Protection Program to construct one of the GSI sites. And most recently in January, we received notification that we were awarded $236,175 from the PA Department of Environmental Protection (DEP) Growing Greener Program to construct a second site and install 200 Hydras. Both of these grant awards will allow us to implement the first phase of the RRRP, which proposes to remove 7 million gallons of annual runoff from the combined sewer system.
Stay tuned for proposed plans, details, schedule of implementation, and outreach events related to the RRRP!
Earth Day was technically Tuesday, April 22nd, but NMRWA staff members were busy this past weekend with several Earth Day events happening throughout Pittsburgh…
Clean Rivers Campaign’s Earth Day 2014 Walking Tour
Millvale, PA has made great strides in incorporating green infrastructure into the borough. Located along the Allegheny River, Millvale is susceptible to flooding, particularly from Girty’s Run which flows through downtown. They suffered from a massive flood in 2004 which destroyed and damaged many homes and buildings.
Tired of sewage backing up in their basements and floods damaging their infrastructure, Millvale turned to green infrastructure to absorb the rainwater before it hits the sewer system.
The borough’s rain barrels, rain gardens, urban farm, street trees and bioswales all help prevent flooding in town. The tour started at the Millvale Library, with Councilman Brian Wolovich explaining how their green efforts came about from community interest. From solar panels on the roof to rain barrels and a rain garden in the backyard, the library is the first for Millvale and is also extremely sustainable.
Other tour stops included a large urban farm, the Millvale community gardens, and a large rain garden. The tour ended with delicious pastries in town and some participants walked up to Mt. Alvernia where Sister Donna spoke about their bioswales. For more pictures, visit the Clean Rivers Campaign Facebook page!
This was the first tour in a series of five, each in a different neighborhood. The series will continue in the Nine Mile Run watershed in late May. To learn more and to register for the tour, visit: http://cleanriverscampaign.org/get-involved/upcoming-events/
Tree Care & Comcast Cares Day at Dickson School
Other NMRWA staff joined Comcast employees for a volunteer day at Dickson School in Swissvale. Over 30 Comcast employees joined students and parents of students from Dickson School to care for trees and a community garden on the school’s campus. As part of the Comcast Cares day, the attendees weeded and mulched trees, painted picnic tables, and weeded the community garden. NMRWA staff was on hand with tools and knowledge on how to properly care for the trees that were at the school.
The staff members then traveled to Washington and Noble Streets in Swissvale where they cared for street trees. Along with the borough and about six volunteers, staff members were able to care for trees throughout the downtown Swissvale area.
Mt. Lebanon Earth Day 2014
Stormworks staff & NMRWA Board Member Matt Wholey attended the Mt. Lebanon Earth Day on Saturday in Main Park. The event was a great success with live music, lots of great vendors and about 200 people in attendance. Even a Tesla was on display!
You may remember that Stormworks recently unveiled its new rain barrel – the StormWorks Hydra. Attendees were very interested in this innovative design, which you can read more about here. Staff also handed out packets filled with seeds from native rain garden plants!
As you can see, the weekend was a busy and productive one. Thanks to everyone who attended or helped out with these events this past weekend! We always enjoy seeing you out in the community and look forward to seeing you in the watershed soon.