DAUPHIN COUNTY ACT 167 PLAN PHASE II ACKNOWLEDGEMENTS The Dauphin County Conservation District would like to thank the following individuals, municipalities, and agencies for their assistance and support of this project: DAUPHIN COUNTY COMMISSIONERS JEFFREY T. HASTE DOMINIC DIFRANCESCO II GEORGE P. HARTWICK III PENNSYLVANIA DEPARTMENT OF ENVIRONMENTAL PROTECTION BARRY NEWMAN NANCY CISAR JEN KEHLER DAUPHIN COUNTY WATERSHED PLAN ADVISORY COMMITTEE NORTHERN PLANNING REGION JERRY STRAUB BERRYSBURG BOROUGH FREDERICK RENN ELIZABETHVILLE BOROUGH LARRY SHADE GRATZ BOROUGH BONNIE LIDLE HALIFAX BOROUGH NORMA SHEARER HALIFAX TOWNSHIP RUSSELL MILLER JACKSON TOWNSHIP ED FISHER JEFFERSON TOWNSHIP CLAUDIA MOFFEI LYKENS BOROUGH ALBERT MORGAN LYKENS TOWNSHIP PAUL REITZ MIFFLIN TOWNSHIP JAMES BULLOCK MILLERSBURG BOROUGH JOSEPH REED PILLOW BOROUGH MARJORIE ALESKY REED TOWNSHIP THOMAS SHAFFER UPPER PAXTON TOWNSHIP JAMES WILBERT, SR. WASHINGTON TOWNSHIP ED FISHER WAYNE TOWNSHIP DAVID PERNIOLA WICONISCO TOWNSHIP DONALD SCHWALM WILLIAMS TOWNSHIP DANE WILLIARD WILLIAMSTOWN BOROUGH Dauphin County Conservation District & Herbert, Rowland & Grubic, Inc. Dauphin County Phase II Act 167, Stormwater Management Plan CENTRAL PLANNING REGION JOSEPH LINK CITY OF HARRISBURG STEPHEN BOMGARDNER DAUPHIN BOROUGH JAROMIR KOVARIK EAST HANOVER TOWNSHIP ED FISHER MIDDLE PAXTON TOWNSHIP SERRELL ULRICH MIDDLE PAXTON TOWNSHIP WILLIAM HAWK LOWER PAXTON TOWNSHIP JOHN NINOSKY, SR. PAXTANG BOROUGH KEVIN RAMPER PENBROOK BOROUGH RONALD KOPPENHAVER RUSH TOWNSHIP ROBERT CASSEL SOUTH HANOVER TOWNSHIP JACQUELYN PATTON SUSQUEHANNA TOWNSHIP LARRY HARTMAN WEST HANOVER TOWNSHIP SOUTHERN PLANNING REGION NORM MILLER CONEWAGO TOWNSHIP THOMAS CLARK DERRY TOWNSHIP KENT BACHMANN HERCO/CONEWAGO TOWNSHIP D. ROBERT BRADY HIGHSPIRE BOROUGH MICHAEL O’KEEFE HUMMELSTOWN BOROUGH STEVE LETAVIC LONDONDERRY TOWNSHIP RONALD PAUL LOWER SWATARA TOWNSHIP EDWARD KAZLAUSKAS MIDDLETOWN BOROUGH JEFF REITZ ROYALTON BOROUGH JOSHUA HANES STEELTON BOROUGH/HRG PAUL CORNELL SWATARA TOWNSHIP THOMAS EMBICH SWATARA CREEK WATERSHED ASSOCIATION JAMES SYMBORSKI TRI-COUNTY PLANNING COMMISSION Dauphin County Conservation District & Herbert, Rowland & Grubic, Inc. Dauphin County Phase II Act 167, Stormwater Management Plan TABLE OF CONTENTS INTRODUCTION......................................................................................................................... 1 PLANNING APPROACH AND PLANNING REGIONS ................................................................ 3 Planning Approach.............................................................................................................. 3 Stormwater Management Standards ............................................................................... 3 Incorporation of Existing Plans ............................................................................................ 3 Existing Dauphin County Act 167 Plans ............................................................................. 4 Planning Regions.................................................................................................................. 7 Planning Regions Description ............................................................................................. 8 Floodplain Data...................................................................................................................10 Land Cover Data For Modeled Watersheds......................................................................11 EXISTING MUNICIPAL REGULATIONS/RELATED PLANS ...........................................................13 Northern Planning Region ..................................................................................................13 Central Planning Region.....................................................................................................16 Southern Planning Region ..................................................................................................18 Related Plans Review .........................................................................................................20 GOALS OF SOUND STORMWATER MANAGEMENT PLANNING ..............................................21 TECHNICAL CONTROL STANDARDS ........................................................................................24 Volume Control...................................................................................................................25 Control Guideline 1 (CG-1)............................................................................................... 26 Control Guideline 2 (CG-2)............................................................................................... 26 Water Quality Control .........................................................................................................27 Control Guideline for Total Water Quality....................................................................... 27 Peak Rate Control (Release Rates) ...................................................................................28 Existing Release Rates ........................................................................................................ 28 Proposed Release Rates.................................................................................................... 28 ECONOMIC IMPACT OF STORMWATER MANAGEMENT STANDARDS ...................................31 ADDITIONAL RECOMMENDATIONS ........................................................................................47 PLAN REVIEW, IMPLEMENTATION AND UPDATE PROCEDURES...............................................49 Plan Review and Implementation .....................................................................................49 Plan Update Procedures.....................................................................................................50 Dauphin County Conservation District & Herbert, Rowland & Grubic, Inc. Dauphin County Phase II Act 167, Stormwater Management Plan TMDL DISCUSSION ...................................................................................................................51 General TMDL Background ................................................................................................51 Water Quality Status Categories........................................................................................53 Previous Studies...................................................................................................................55 Swatara Creek Subwatersheds Impairment .....................................................................55 Spring Creek (East) Watershed Impairment .....................................................................56 Unnamed Tributary to Bow Creek Watershed TMDL.........................................................57 Bear Creek Watershed TMDL..............................................................................................57 Conewago Creek Watershed TMDL ..................................................................................58 Mahantango Creek Watershed Impairment ....................................................................60 Rausch Creek Watershed TMDL.........................................................................................60 Wiconisco Creek Watershed TMDL....................................................................................61 General Recommendations ..............................................................................................62 Agricultural Activities And Recommendations ................................................................62 POTENTIAL FUNDING RESOURCES...........................................................................................68 Funding Resources Introduction ........................................................................................68 Stormwater Management Funding Resources .................................................................69 H2O PA Act (Act 63 of 2008) – Grant .............................................................................. 69 Pennsylvania Infrastructure Investment Authority.......................................................... 69 Department Of Community and Economic Development (DCED)........................... 70 PA Department of Environmental Protection (PADEP) ................................................. 70 League of Women Voters of Pennsylvania .................................................................... 72 Environmental Protection Agency (EPA) ........................................................................ 73 Federal Emergency Management Agency (FEMA) ..................................................... 74 United States Army Corps of Engineers (ACOE)............................................................. 74 Natural Resources Conservation Service (NRCS) .......................................................... 75 Creation of a Stormwater Authority/Utility...................................................................... 76 REFERENCES .............................................................................................................................77 LIST OF PLATES PLATE 1 – HYDROLOGIC SOIL MAP PLATE 2 – 2005 EXISTING LAND USE PLATE 3 – FULL BUILD OUT - FUTURE LAND USE PLATE 4 – LAUREL AND BURD RUN WATERSHED RELEASE RATES PLATE 5 – SPRING CREEK WATERSHED RELEASE RATES PLATE 6 – PROBLEM AREAS AND OBSTRUCTIONS IN NORTHERN DAUPHIN COUNTY PLATE 7 – PROBLEM AREAS AND OBSTRUCTIONS IN SOUTHERN DAUPHIN