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Appendix 10 Boston Harbor: Weymouth & Weir River

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Appendix 10 Boston Harbor: Weymouth & Weir River 2018-20ILApp10_BHWeymouthWeir_DRAFT210322.docx Appendix 10 Boston Harbor: Weymouth & Weir River Watershed and Coastal Drainage Area Assessment and Listing Decision Summary Massachusetts Integrated List of Waters for the Clean Water Act 2018/20 Reporting Cycle Draft for Public Comment Prepared by: Massachusetts Department of Environmental Protection Division of Watershed Management Watershed Planning Program 2018-20ILApp10_BHWeymouthWeir_DRAFT210322.docx Table of Contents 2018/20 Cycle Impairment Changes ............................................................................................................. 3 Accord Brook (MA74-16) .............................................................................................................................. 5 Accord Brook (MA74-17) .............................................................................................................................. 7 Accord Pond (MA74030) ............................................................................................................................... 9 Blue Hill River (MA74-25) ............................................................................................................................ 10 Cochato River (MA74-06) ............................................................................................................................ 11 Cranberry Brook (MA74-22) ....................................................................................................................... 13 Crooked Meadow River (MA74-01) ............................................................................................................ 14 Supporting Information for Delisted Impairments ................................................................................. 15 Eel River (MA74-21) .................................................................................................................................... 18 Farm River (MA74-27) ................................................................................................................................. 19 Farm River (MA74-28) ................................................................................................................................. 21 Furnace Brook (MA74-10) ........................................................................................................................... 22 Supporting Information for Delisted Impairments ................................................................................. 24 Great Pond (MA74012) ............................................................................................................................... 30 Hingham Harbor (MA74-18) ....................................................................................................................... 31 Hoosicwhisick Pond (MA74015) ................................................................................................................. 32 Lake Holbrook (MA74013) .......................................................................................................................... 33 Mary Lee Brook (MA74-23) ......................................................................................................................... 34 Mill River (MA74-04) ................................................................................................................................... 35 Monatiquot River (MA74-08) ...................................................................................................................... 37 Supporting Information for Delisted Impairments ................................................................................. 39 Old Quincy Reservoir (MA74017) ............................................................................................................... 47 Old Swamp River (MA74-03)....................................................................................................................... 48 Plymouth River (MA74-20) ......................................................................................................................... 50 Smelt Brook (MA74-24) .............................................................................................................................. 51 Smelt Brook Pond (MA74018) .................................................................................................................... 52 Sunset Lake (MA74020) .............................................................................................................................. 53 Sylvan Lake (MA74021) ............................................................................................................................... 54 Town Brook (MA74-09) ............................................................................................................................... 55 Town River Bay (MA74-15) ......................................................................................................................... 57 Trout Brook (MA74-12) ............................................................................................................................... 58 1 2018-20ILApp10_BHWeymouthWeir_DRAFT210322.docx Unnamed Tributary (MA74-19) .................................................................................................................. 59 Unnamed Tributary (MA74-26) .................................................................................................................. 61 Weir River (MA74-02) ................................................................................................................................. 62 Weir River (MA74-11) ................................................................................................................................. 64 Weymouth Back River (MA74-05) .............................................................................................................. 65 Weymouth Back River (MA74-13) .............................................................................................................. 67 Weymouth Fore River (MA74-14) ............................................................................................................... 68 Whitmans Pond (MA74025) ....................................................................................................................... 70 Supporting Information for Delisted Impairments ................................................................................. 71 References .................................................................................................................................................. 72 2 2018-20ILApp10_BHWeymouthWeir_DRAFT210322.docx 2018/20 Cycle Impairment Changes 2018/20 Impairment 2016 AU AU ATTAINS Action Change Waterbody AU_ID Category Category Impairment ID Summary Accord Brook MA74-16 5 5 Dissolved Oxygen Added Accord Brook MA74-17 4c 5 Benthic Macroinvertebrates Added Cochato River MA74-06 5 5 Chlordane in Sediment Added Cochato River MA74-06 5 5 Copper Added Cochato River MA74-06 5 5 DDT in Sediment Added Cochato River MA74-06 5 5 Escherichia Coli (E. Coli) R1_MA_2019_01 Changed Cochato River MA74-06 5 5 Fecal Coliform R1_MA_2019_01 Changed Cochato River MA74-06 5 5 Lead Added Crooked MA74-01 5 2 Nutrient/Eutrophication Removed Meadow River Biological Indicators Farm River MA74-27 -- 5 (Fish Passage Barrier*) Added Farm River MA74-28 -- 5 (Fish Passage Barrier*) Added Furnace Brook MA74-10 5 5 Benthic Macroinvertebrates Added Furnace Brook MA74-10 5 5 Dissolved Oxygen Removed Great Pond MA74012 -- 4c (Fish Passage Barrier*) Added Hingham Harbor MA74-18 5 5 Escherichia Coli (E. Coli) R1_MA_2019_01 Changed Hingham Harbor MA74-18 5 5 Fecal Coliform R1_MA_2019_01 Changed Mill River MA74-04 5 4a Escherichia Coli (E. Coli) R1_MA_2019_01 Changed Mill River MA74-04 5 4a Fecal Coliform R1_MA_2019_01 Changed Monatiquot MA74-08 5 5 (Curly-leaf Pondweed*) Added River Monatiquot MA74-08 5 5 Dissolved Oxygen Removed River Monatiquot MA74-08 5 5 Escherichia Coli (E. Coli) R1_MA_2019_01 Changed River Monatiquot MA74-08 5 5 Fecal Coliform R1_MA_2019_01 Changed River Monatiquot MA74-08 5 5 (Fish Passage Barrier*) Added River Old Swamp MA74-03 5 4a Escherichia Coli (E. Coli) R1_MA_2019_01 Changed River Old Swamp MA74-03 5 4a Fecal Coliform R1_MA_2019_01 Changed River Smelt Brook MA74-24 -- 4c (Fish Passage Barrier*) Added Town Brook MA74-09 5 5 Escherichia Coli (E. Coli) R1_MA_2019_01 Changed Town Brook MA74-09 5 5 Fecal Coliform R1_MA_2019_01 Changed Town River Bay MA74-15 5 5 Enterococcus R1_MA_2019_01 Changed Town River Bay MA74-15 5 5 Fecal Coliform R1_MA_2019_01 Changed Unnamed MA74-19 3 5 Temperature Added Tributary Weir River MA74-02 5 5 (Curly-leaf Pondweed*) Added Weir River MA74-02 5 5 Escherichia Coli (E. Coli) R1_MA_2019_01 Changed Weir River MA74-02 5 5 Fecal Coliform R1_MA_2019_01 Changed Weir River MA74-02 5 5 (Fish Passage Barrier*) Added Weir River MA74-11 5 5 Fecal Coliform R1_MA_2019_01 Changed Weymouth Back MA74-05 5 5 Escherichia Coli (E. Coli) R1_MA_2019_01 Changed River 3 2018-20ILApp10_BHWeymouthWeir_DRAFT210322.docx 2018/20 Impairment 2016 AU AU ATTAINS Action Change Waterbody AU_ID Category Category Impairment ID Summary Weymouth Back MA74-05 5 5 Fecal Coliform R1_MA_2019_01 Changed River Weymouth Back MA74-13 5 5 Fecal Coliform R1_MA_2019_01 Changed River Weymouth Fore MA74-14 5 5 Enterococcus R1_MA_2019_01 Changed River Weymouth Fore MA74-14 5 5
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