Downspout Disconnect Application
Homeowner's Guide to Stormwater
Keep the Rain Out of the Drain!
Storm Water Management Tips for Homeowners
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Etna Borough Rain Garden Project
Etna Green Infrastructure Master Plan Demonstration Project
Stormwater Smart PA
Please see the Borough Stormwater Management Ordinance – No 1378. This ordinance is applicable during any new construction and/or new development project, within the Borough of Etna. There are also guidelines dealing with redevelopment, grading and other aspects of development that can affect storm water in our community. It also limits were new development can happen within our community. This ordinance provides for a fifty foot buffer along any watercourse that is within our Community or surrounds our community. It is important in Etna Borough that we pay close attention to storm water management. Being the community at the bottom of the Pine Creek Watershed and Sewershed, we have many issues with storm water problems. Sewer capacity within the combined sewer system can be exceeded during heavy rain events, causing overflows to our streams is one of those issues. Localized flooding is another issue we face. Proper stormwater management regulations can help address these issues. As can a more proactive approach to storm water source control, which the Borough is actively pursuing where appropriate. (see next article).
The Etna Green Infrastructure Master Plan Project
This ongoing study was financed by a grant administered by the Pennsylvania Environmental Council (PEC). The objective of the study to assess the feasibility of reducing/eliminating proposed gray infrastructure alternatives by managing the 90% of Typical Year 2003 runoff through the implementation of green solutions within the Borough of Etna, a combined sewer system community. In addition, the project is intended to develop a methodology for communities to evaluate and select basin retrofit options using Shaler Township as a case study.
The project uses innovative site screening techniques developed by Landbase Systems to conceptually locate and size green infrastructure (GI), referred to as Best Management Practices (BMPs). The screening started not with availability of sites but identification and prioritization of high yield inlets via the Etna GIS where GI could be most advantageously sited.
The Etna Borough GIS model was used in tandem with available soils, slope, and other land use/cover data to characterize the individual catchment areas contributing to the Etna combined sewer system. Each of the catchments was associated with a combined sewer overflow.
The calibrated SWMM Etna sewer system model is used to evaluate the impacts of GI BMPs on the volume and rate of flow during the so-
The Borough has already began construction on several of the projects identified in the Plan. This is Phase I of the Green Streetscape Project, completed in August of this year. This project will remove over 500,000 gallons of stormwater from the combined sewer system.
Storm Water Management
In the Borough’s efforts to address combined sewer overflows and storm water run-
When storm water makes its way to the sewage treatment plant (Allegheny County Sanitary Authority ALCOSAN), it is treated like sewage, which increases the cost of sewage for all of us. Correctly removing roof drains from the sewer system by approved and permitted methods can potentially reduce the amount of rainwater that enters the sewer system.
Removal may not work for everyone or in every case. The density of the building and types of soils in our community means removing roof drains in homes located in some areas may not be appropriate. You can also look to minimize runoff from new or existing paved surfaces by installing porous pavements instead of traditional asphalt or concrete.
If you are interested in exploring the possibility of downspout disconnection, please contact the Borough Manager for more information at 412-
Dumping yard waste (fall leaves, etc.) into any of the streams or storm runs located within the community is illegal. Litter tossed on to the local roads can end up in our combined sewer system and cause serious problems to downstream neighbors. Anyone caught draining oil and other liquids from their vehicle into a storm drain will be prosecuted to the fullest extent that the law allows. See Ordinance No. 1215 for Anti-
Wet Weather Public Outreach Campaign Ads
In an effort to help Southwestern Pennsylvania communities educate their taxpayers about stormwater and sewage overflows during wet weather, 3 Rivers Wet Weather has launched a broad public outreach campaign, which includes a series of educational ads. The ads below were published in the Pittsburgh Tribune Review, the Pittsburgh Post-
"What goes into our rivers impacts what goes into your glass."
"Guess where you're really putting your lawn fertilizer."
"Is your roof flushing raw sewage into our rivers?"
"What we feed into our storm drains can poison our rivers."
ETNA GREEN INFRASTRUCTURE PROJECT DESCRIPTIONS
Etna Green Streetscape Phase 1: Phase 1 of the project is completed-
Acreage Managed: 0.598
Impervious Acreage Managed: 0.470
GSI Management Strategy: Filter/Infiltrate/Remove
Runoff Managed: 0.64 MG/yr (640,000 gal/yr)
This first phase would involve reconstruction of the east side of Butler Street between Bridge and Freeport Streets as well as the reconstruction of the north side of Freeport Street between Butler Street and Union Alley. This phase would involve installation of with 12 street trees, 2300 cubic feet of underground storage that would promote infiltration, 3900 square feet of pervious pavers, downspout disconnection and restatement to new conveyances and related work. Storm water management is essential to water quality in our streams, creeks and rivers. It can also have a dramatic effect on drinking water quality as it reduces pollutants in ground water. As rain water travels over paved surfaces it picks up grit and debris including salt and other pollutants and deposits them into the combined system or into the ground. Collecting this rain water at is source helps to eliminate this from happening.
The project will entails other improvements and traffic calming/safety features: 562 feet of realigned curbing to create bump-
Cost: $475,000 including engineering (Actual to date)
Etna Green Streetscape Phase 2
Acreage Managed: 0.65
Impervious Acreage Managed: 0.425
GSI Management Strategy: Filter/Infiltrate/Remove
Runoff Managed: 0.50 MG/yr (500,000 gal/yr)
Construction of Phase 2 (Etna Green Master Plan Phase 1 GSI Site 196) has been completed in 2017.
This second phase involves reconstruction of the south side of Butler Street between Winschel and Freeport Streets as well as the reconstruction of the south side of Freeport Street between Butler Street and Cherry Alley. This phase includes planting areas with 9 street trees, 2470 cubic feet of underground storage in two locations that infiltrate collected runoff, a reconstructed street section with 1800 square feet of pervious pavers, and a “Rain Park”. It also includes treatment of collected runoff using a proprietary bio-
The Freeport Street Rain Park is designed to manage runoff from the sidewalk and roofs along Freeport Street representing a total tributary area of approximately 9300 square feet. Of this total area approximately 7300 square feet is impervious surface. The rain park itself is approximately 1900 square feet in area with perennial plantings. It uses a high rate proprietary infiltration media to treat and retain entrained solids in collected/conveyed runoff in advance of storage. The facility has 842 cubic feet of subsurface storage and is designed to infiltrate the runoff from a 1.25 inches rainfall event over a 72 hour period. The facility has an overflow pipe that directs excessive RO volume to a nearby catch basin on the corner of Cherry Alley and Freeport Street.
The Love Street Facility is designed to manage runoff from the sidewalk and roofs along Butler Street and Praeger Street conveyed by new piping systems as well as roof runoff from adjacent buildings and other contributing areas tributary to the street such as yards and gravel parking areas. The facility has a total tributary area of approximately 20,900 square feet. The Love Street facility is designed to infiltrate 1629 cubic feet of collected runoff stored in modular storm water storage units (MSSUs) installed under 1800 feet of pervious pavers. In order to install the facility it was necessary to re-
By its nature, the Green Streetscape creates a strong linkage between transportation considerations and the Etna urban context. The Phase 2 of the project therefore includes other improvements and traffic calming/safety features: 554 feet of realigned curbing to create bump-
The project removes runoff from roof, sidewalk and other impervious areas from the combined sewer system and routes it through new conveyances for subsurface storage and infiltration. Based on the completed project, the Phase 2 project will manage runoff from a 0.65 acre area of which 0.425 acres is impervious. This translates into an estimated average of 0.5 MG of runoff managed annually.
Etna School Street Parking Lot Green Infrastructure Project:
Acreage Managed: 1.114
Impervious Acreage Managed: 0.359
GSI Management Strategy: Filter/Infiltrate/Remove
Runoff Managed: 0.54 MG/yr (540,000 gal/yr)
This Green Infrastructure design and construction project is proof-
Full capture from the catchment under the 90/10 target would involve installation of an additional 4500 CF GSI facility in the Walnut Street ROW. The estimated cost for this additional GSI facility would be $190,000. The estimated cost is $ 0.22 per managed gallon.
Cost: $ 74,000 including engineering (Actual to date)
Rain Garden Design and Management Technical Workshop
The Borough of Etna, through its partnership with the Sustainable Lands Program, and a grant from the League of Women Voters, Water Resource Education Network, hosted a technical workshop for the design and management of a rain garden on September 7, 2013. As part of that program, an actual hands-
About 40 landscape contractors, landscape architects, students and interested parties attended the one day session held form 9 am to 3 pm in the Municipal Building. The event organizers included Allegheny County, Allegheny County Conservation District, Audubon Society of Western Pa., the City of Pittsburgh, the Pa. Department of Conservation and Natural Resources, 3 Rivers Wet Weather, the Penn State Center, Nine Mile Run Watershed Association/Stormworks, Penn State Extension, Seeds and the Borough of Etna.
The agenda included discussion on what a rain garden and bioswale is; how to site these facilities; how to size, design and cost these facilities and the necessary installation methods. Experts spoke of the appropriate plants for these installations and how to address maintenance of rain gardens. The afternoon session was an on-
Below are just some of the pictures of the workshop. The site is beautiful and functions wonderfully – as was evidenced by the heavy downpours just a few days after installation. Watch for the video of the entire program which will be posted on this website as well as other websites.
WHAT DO YOU DO WHEN IT’S RAINING……
A simple enough question – but if you are like most of us – you stay home and “get things done around the house”. Makes sense, doesn’t it? As we have been sharing with you, Etna is a combined sewer commu-
You can help with this reduction in a number of ways. Rain barrels and rain gardens are examples of good ways of how to keep the rain water out of our sewer system. Consider disconnecting your roof gutter and installing a rain barrel at your home to catch this rain water. The rain water can be reused to water your garden or plants in your home. Etna requires a permit for this installation – which is simple and easy to complete. It is important in our densely populated community to make sure we don’t direct the rain towards someone else’s property and cause foundation flooding to our neighbors. If you go through this program of permitting and properly installing the rain barrel you can receive a $5.00 credit on your bi-
Now to our opening line…….…...WHAT DO YOU DO WHEN IT’S RAINING???
Some of the things that we all like to do when we are forced to stay indoors is laundering and dish washing. Makes perfect sense, or does it? If our sewers are overloaded during rain events, it is important that dur-
The Etna Borough School Street Parking Lot Green Infrastructure Project
Completed in July, this project uses new technology, a unique stormwater best management practice (BMP) that consists of a 20-