Castle Shannon Borough  Borough Council  Annual MS4 Update  APRIL 26, 2021  ta  AALSSE  Civil Engineers and Surveyors    MUNICIPAL SEPARATE STORM SEWER SYSTEM (MS4)  Agenda:  - Permit Overview A Annual MS4 Tasks  Stormwater Management Program (Minimum Control Measures)  - PADEP Compliance Evaluation  Annual Report DEP Inspection  Current cycle of inspections for 2018 Permit is underway  - Total Maximum Daily Load Plan  ALSSE CMiIlE Engineers ands Surveyd    MUNICIPAL SEPARATE STORM SEWER SYSTEM (MS4)  Permit Overview - NPDES Permit for Stormwater Discharges  from Small MS4s  - Municipal Separate Storm Sewer System (MS4) - Permit applies to  stormwater infrastructure that is:  Used for collecting and/or conveying stormwater Owned by a municipality or any other public body  Not used as a combined sewer  Not part of Publicly Owned Treatment Works (i.e. sewage treatment plant) - NPDES MS4 Permit authorizes discharge of stormwater from the MS4  to the Waters of the Commonwealth  NPDES MS4 Permit issued by PADEP in Pennsylvania. The program is  administered nationally by EPA.  Primary goal of the permit: Protecting water quality and limiting  stormwater pollution  ALSSE CMvilB Engineers and Surveyd    MUNICIPAL SEPARATE STORM SEWER SYSTEM (MS4)  Annual MS4 Tasks  D Update and Implement Stormwater Management Program (Written  Plan) addressing each MCM:  MCM #1 - Public Education and Outreach on Stormwater Impacts  MCM #2 - Public nvolvementParticipation MCM #3 - Illicit Discharge Detection and Elimination MCM #4 - Construction Site Stormwater Runoff Control  MCM #5 - rost-Construction Stormwater Management (PCSM) in New and  Re-Development Activities  MCM #6 - Pollution Prevention/G00d Housekeeping The Stormwater Management Program must:  Reduce the discharge of pollutants from the MS4 to the maximum extent  practicable,  Protect water quality, and  Satisfy appropriate water quality requirements of the Clean Water Act  and the Pennsylvania Clean Streams Law  ALSSE CMilB Engineers and Surveyo    MUNICIPAL SEPARATE STORM SEWER SYSTEM (MS4)  Annual Reports  -- Due September 30 of each year  - Self reporting on progress made for each MCM, along with PRP and  PCM progress  - $500 renewal fee due annually  DEP or EPA Inspections  L DEP Inspects each permittee at least once every 5 years  - Inspections for 2018 Permit are underway  Office Review - Thorough review of written plans and documentation of compliance with required Minimum Control Measures. Documentation of all MS4 related activities (event flyers, distributed materials, work logs, complaint resolution tracking, outfall screening etc.)  Field Review = Evaluation of municipal facilities including Public Works yard, garage, salt storage and other facilities. Field review of BMPs and  outfalls  ALSSE CMvilB Engineers and Survey    MUNICIPAL SEPARATE STORM SEWER SYSTEM (MS4)  Total Maximum Daily Load Plan (TMDL) was developed in 2017 and submitted to PADEP to meet the following requirements: O All permittees that discharge to waters with EPAApproved TMDL must reduce  following pollutants:  Nutrients (Nitrogen and Phosphorus)  Sediment  The following reductions must be achieve within 5 years of permit issuance (March 2023 for General Permits):  Achieve 10% reduction in pollutant loading of sediment Achieve 5% reduction in pollutant loading of total phosphorus  TMDL approved by PADEP established:  Total pollutant loading required to be addressed in permit term - Potential BMPs to be constructed to achieve required pollutant  reduction goals.  ALSSE Civil Engineers and Surveyo    MUNICIPAL SEPARATE STORM SEWER SYSTEM (MS4)  BMPs identified in the TMDL Plan must be constructed and the required pollutant reduction achieved by March 2023 Municipal budget for each year must include funds for:   Final Design of BMPs  OA Acquisition of property, as needed for BMP construction  ( Construction costs for installation of new BMPs or retrofit of existing BMPs, including bidding costs if constructed by a contractor  OA Annual maintenance of all BMPs  Each Annual Report will include documentation and supporting calculations for reductions achieved through implementation of  the TMDL Plan.  ALSSE Civil Engineers and Surveyd    STREAM RESTORATION SCHMEMATIC  Wildlife Habitat Flood Control Water Quality  Bank Stabilization Bank_Stabilization  ALSSE Civil Engineers and Surveye    MUNICIPAL SEPARATE STORM SEWER SYSTEM (MS4)  Structural BMPs - Stream Restoration  Intent is to re-connect the floodplain and establish a riparian buffer  Right-of-way or easements may be required 0 Long term annual maintenance needed on all BMPs  A Additional flood control benefits  EXISTING GRADE-  ZONE 3 12' MIN.  ZONE 2 ZONÉ 1 PLANTING PLANTING FORESTED ZONE SCHEDULE STREAM SEE ZONE 1 ZONE 2  ZONE 3 12' MIN.  EXISTING GRADE  2' MIN. 3' MIN.  3'MN. 2 MIN.  ERODED BANK- TABILIZATION PYRAMAT SLOPE FABRIC  M ANCHOR STREAMBED  EXISTING STREAMBED  ALSSE Civil Engineers and Surveyd    STREAM RESIORATION - OVERVIEW  - Scope of Work  ( Clean Non-Native Material from Streambed  - Regrade Adjacent Slopes to Provide Floodplain Area  ) Install Plantings to form Riparian Buffer  SAW MILL RUN = PROJECT LOCATION (LOOKING  DOWNSTREAM)  Lennon, Smith, Souler Engineering, Inc. Cvil Egreess srus Suveus    STREAM RESTORATION - EXISTING CONDITIONS  SAW MILL RUN - PROJECT LOCATION (LOOKING UPSTREAM)  SAW MILL RUN - PROJECT LOCATION (LOOKING DOWNSTREAM)  Lennon, Smith, Soulen Engineering, Inc. vil: Bgroeesre Suveus    STREAM RESTORATION - OVERVIEW  ZONE 3 PLANTINGS    ZONE 2 PLANTINGS  TREES  UNER CONSTRUCTON  ZONE 1 PLANTINGS  TREES  Lennon, Smith, Soulen Engineering, Inc. Cvilbgroevsre SuNeus    STREAM RESTORATION - TYPICAL SECTION  1065 1060 1055 1050 1045 1040 1035 1030 1025 0+00  1055 1050 1055 105D 1045 1040 1035 1032 1025 2+00  ENSIne GRAAF  PROPOSED GRADE    1+00 STA. 0+00 TO 2+00 SECTION A-A Horiz: 1"=20' Vert: 1"=10'  Lennon, Smith, Souler Engineering, Inc. Cwilngrowvsrus Suvesus    STREAM RESTORATION - TYPICAL SECTION  11065 n0sD 1055 1050 1045 1049 1035 1030 1025  1060  APARNN IMT aF EXS7NE FAAMONG 1055  1050 1045 1040 1035 1030 1C25  1.5:1 REINFORCED SLOPE BEGINNING AT ELEVATION 1032.0 4  RASTGARE  'ra!  5'  PROPOSED GRADE  100 90 BO 70 60 50 40 Da 20 10  10 20 30 40 50 60 70 BO 90  STATION: 2+25.00  Lennon, Smith, Souler Engineering, Inc. Cvilbgroees yre: Suveus    STREAM RESTORATION BUFFER AREA EXAMPLES  ESTABLISHED BUFFER AREA  GLSSE CMvIE Engineers and Survey    STREAM RESTORATION PLANTINGS  tree-guide.com  ZONE 3 PLANTINGS  ZONE 2 PLANTINGS  ZONE 1 PLANTINGS  ALSSE Civil Engineers ands Surveyd    STREAM RESTORATION - CURRENT PERMIT SCOPE  Proposed project is located between Canal Street and James Street  (Approximately 255 Linear Feet)  BEGINNING LIMITS  ENDLIMITS  -  ALSSE CMil Engineers ands Suveyo    STREAM RESTORATION - POTENTIAL FUTURE  SCOPES  Potential Future Stream Restoration Projects include portion of Saw Mill Run  from Rockwood Avenue to Townhouses on Canal Street  CURRENT STREAM RESTORATION PROJECT (255LF)  POTENTIAL STREAM RESTORATION PROJECT (APPROX. 300LF)  CanaiSt  POTENTIAL STREAM RESTORATION PROJECT (APPROX. 260LF)  POTENTIAL STREAM RESTORATION PROJECT (APPROX. 300LF)  Google Earth  ALSSE CMlE Engineers and Surveye    MUNICIPAL SEPARATE STORM SEWER SYSTEM (MS4)  Structural BMPs - Stream Restoration - Saw Mill Run - Anticipated Schedule Surveys have been completed  Initial Design Call held with PADEP in February 2021  Complete Permit application submission anticipated for May 2021 Permit Expected to be Issued for by End of 2021(Six to Twelve Month  Lead Time)  Easement Acquisition to be completed during Permit Review Process and upon issuance of Permits - Have completed by Early 2022  Project Bid Spring 2022  Construction Anticipated Late Spring 2022 Project Closeout in Summer 2022  GLSSE CMIE Engineers and Surveyo    CONTACTS  Jason E. Stanton, P.E.  Lennon, Smith, Souleret Engineering, Inc.  stanton@isse.com  Shawn R. Wingrove, E.I.T.  Lennon, Smith, Souleret Engineering, Inc.  swingrove@lsse.com  AALSSE CiilE Engineers and Survey