DRAFT LITTLE CONNOQUENESSING CREEK WATERSHED TMDL Butler County For Acid Mine Drainage Affected Segments Prepared by: Pennsylvania Department of Environmental Protection September 30, 2008 1 DRAFT TABLE OF CONTENTS Introduction................................................................................................................................. 3 Directions to the Little Connoquenessing Creek Watershed...................................................... 7 Segments addressed in this TMDL............................................................................................. 7 Clean Water Act Requirements .................................................................................................. 8 Section 303(d) Listing Process ................................................................................................... 9 Basic Steps for Determining a TMDL...................................................................................... 10 Watershed Background............................................................................................................. 10 AMD Methodology................................................................................................................... 12 TMDL Endpoints...................................................................................................................... 14 TMDL Elements (WLA, LA, MOS) ........................................................................................ 15 Allocation Summary................................................................................................................. 15 Recommendations..................................................................................................................... 20 Public Participation................................................................................................................... 23 Future TMDL Modifications .................................................................................................... 24 Changes in TMDLs That May Require EPA Approval............................................................ 24 Changes in TMDLs That May Not Require EPA Approval..................................................... 24 Method to Quantify Treatment Pond Pollutant Load ............................................................... 32 TABLES Table 1. 303(d) Listed Segments ................................................................................................... 3 Table 2 Applicable Water Quality Criteria.................................................................................. 15 Table 3. Little Connoquenessing Creek Watershed Summary Table.......................................... 16 ATTACHMENTS Attachment A ............................................................................................................................................25 Little Connoquenessing Creek Watershed Map .....................................................................................25 Attachment B.............................................................................................................................................28 Method for Addressing Section 303(d) Listings for pH.........................................................................28 Attachment C ............................................................................................................................................31 Method for Calculating Loads from Mine Drainage Treatment Facilities from Surface Mines ............31 Attachment D ............................................................................................................................................36 TMDLs By Segment...............................................................................................................................36 Attachment E.............................................................................................................................................63 Excerpts Justifying Changes Between the 1996, 1998, and 2002 Section 303(d) Lists and Integrated Report/List (2004, 2006) ........................................................................................................................63 Attachment F.............................................................................................................................................66 Water Quality Data Used In TMDL Calculations ..................................................................................66 Attachment G ............................................................................................................................................73 TMDLs and NPDES Permitting Coordination.......................................................................................73 Attachment H ............................................................................................................................................76 Comment and Response .........................................................................................................................76 2 DRAFT TMDL1 Little Connoquenessing Creek Watershed Butler County, Pennsylvania Introduction This report presents the Total Maximum Daily Loads (TMDLs) developed for segments in the Little Connoquenessing Creek Watershed (Attachment A). These were done to address the impairments noted on the 1996 Pennsylvania Section 303(d) list of impaired waters, required under the Clean Water Act, and covers segments on that list and additional segments on later lists/reports. Little Connoquenessing Creek was originally listed as cause unknown, but subsequent lists have attributed its impairments due to metals. All impairments resulted from acid drainage from abandoned coalmines. The TMDL addresses the three primary metals associated with acid mine drainage (iron, manganese, aluminum) and pH. Table 1. 303(d) Sub-List HUC 05030105; State Water Plan (SWP) Subbasin: 20-C Year Miles Segment DEP Stream Name Desig- Data Source EPA 305(b) ID Stream nated Use Source Cause Code Code 1996 1.7 4580 34918 Little Connoquenessing CWF 303 (d) List Resource Cause Creek (BASIN) Extraction Unknown 1998 0.88 4580 34918 Little Connoquenessing CWF SWMP Abandoned Metals Creek Mine Drainage 2002 0.88 990831- 34918 Little Connoquenessing CWF SWMP Abandoned Metals 1530-JJM Creek Mine Drainage 2004 11.6 990831- 34918 Little Connoquenessing CWF SWMP Abandoned Metals 0.9 1530-JJM Creek Mine Drainage 990901- 0910-JJM 2004 0.7 990831- 34920 UNT Little CWF SWMP Abandoned Metals 1530-JJM Connoquenessing Creek Mine Drainage 2004 0.9 4580 34956 UNT Little CWF SWMP Abandoned Metals Connoquenessing Creek Mine Drainage 2004 0.7 990831- 63823 UNT Little CWF SWMP Abandoned Metals 1530-JJM Connoquenessing Creek Mine Drainage 2004 4.5 990831- 34927 Little Yellow Creek CWF SWMP Abandoned Metals 1530-JJM Mine Drainage 2004 1.6 990824- 34930 UNT Little Yellow CWF SWMP Abandoned Metals 1040-JJM Creek Mine Drainage 990831- 1530-JJM 2004 0.8 990831- 34932 UNT Little Yellow CWF SWMP Abandoned Metals 1530-JJM Creek Mine Drainage 1 Pennsylvania’s 1996, 1998, and 2002 Section 303(d) lists and the 2004 and 2006 Integrated Water Quality Report were approved by the Environmental Protection Agency (EPA). The 1996 Section 303(d) list provides the basis for measuring progress under the 1997 lawsuit settlement of American Littoral Society and Public Interest Group of Pennsylvania v. EPA. 3 DRAFT 2004 7.3 990824- 34921 Yellow Creek CWF SWMP Abandoned Metals 1245-JJM Mine Drainage 990831- 1530-JJM 2004 1.0 990831- 34922 UNT Yellow Creek CWF SWMP Abandoned Metals 1530-JJM Mine Drainage 2004 0.9 990831- 34923 UNT Yellow Creek CWF SWMP Abandoned Metals 1530-JJM Mine Drainage 2004 0.6 990831- 34924 UNT Yellow Creek CWF SWMP Abandoned Metals 1530-JJM Mine Drainage 2004 0.6 990831- 34925 UNT Yellow Creek CWF SWMP Abandoned Metals 1530-JJM Mine Drainage 2004 1.1 990831- 34938 UNT Yellow Creek CWF SWMP Abandoned Metals 1530-JJM Mine Drainage 2004 0.5 990824- 34939 UNT Yellow Creek CWF SWMP Abandoned Metals 1245-JJM Mine Drainage 990831- 1530-JJM 2004 0.9 990824- 34940 UNT Yellow Creek CWF SWMP Abandoned Metals 1245-JJM Mine Drainage 990831- 1530-JJM 2004 2.8 990824- 34943 UNT Yellow Creek CWF SWMP Abandoned Metals 1245-JJM Mine Drainage 990831- 1530-JJM 2004 0.3 990824- 34944 UNT Yellow Creek CWF SWMP Abandoned Metals 1245-JJM Mine Drainage 990831- 1530-JJM 2004 0.8 990824- 34946 UNT Yellow Creek CWF SWMP Abandoned Metals 1245-JJM Mine Drainage 990831- 1530-JJM 2004 0.6 990824- 34947 UNT Yellow Creek CWF SWMP Abandoned Metals 1245-JJM Mine Drainage 990831- 1530-JJM 2004 0.4 990824- 34948 UNT Yellow Creek CWF SWMP Abandoned Metals 1245-JJM Mine Drainage 990831- 1530-JJM 2004 0.6 990824- 34949 UNT Yellow Creek CWF SWMP Abandoned Metals 1245-JJM Mine Drainage 990831- 1530-JJM 2004 0.9 990824- 34950 UNT Yellow Creek CWF SWMP Abandoned Metals 1245-JJM Mine Drainage 990831- 1530-JJM 2004 0.6 990831- 34951 UNT Yellow Creek CWF SWMP Abandoned Metals 1530-JJM Mine Drainage 2004 0.5 990831- 34952 UNT Yellow Creek CWF SWMP Abandoned Metals 1530-JJM Mine Drainage 4 DRAFT 2004 1.8 990824- 34953 UNT Yellow Creek CWF SWMP Abandoned Metals 1245-JJM Mine Drainage 990831- 1530-JJM 2004 0.5 990824- 34954 UNT Yellow Creek CWF SWMP Abandoned Metals 1245-JJM Mine Drainage 990831- 1530-JJM 2006 3.45 11188 34918 Little Connoquenessing CWF SWMP Abandoned Metals Creek Mine Drainage 2006 1.78 11190 34918 Little Connoquenessing CWF SWMP Abandoned Metals