The goal of the Clean Water Act (cwa) is to restore and maintain the chemical, physical, and biological integrity of the Nation’s waters
WMA water withdrawal Summary (APPENDIX E, TABLE E5)
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WMA water withdrawal Summary (APPENDIX E, TABLE E5)
*System-wide withdrawal, all sources are not necessarily within this segment. ** A wellhead protection project is underway (Appendix F, Project 01-11/WHP). Additionally, there are 288 acres of cranberry bog open space in this subwatershed, inclusive but not limited to WMA registered growers (UMass Amherst 1999). For the purpose of this report, a conservative estimate of water use for this bog area is approximately 2.6 MGD. Use AssessmentAquatic LifeHabitat and FlowThe impassable weir-pool fishway at the Veterans Memorial Park dam just upstream from the Route 3A bridge, Marshfield is being modified to allow anadromous fish (herring) access to the habitat in this segment of the South River (Reback et al. 2004). Chemistry – waterDWM conducted water quality monitoring (DO and % saturation, temperature, pH, conductivity, alkalinity, hardness, chlorides, nitrate-nitrite nitrogen, ammonia-nitrogen and/or total phosphorus) at two locations in this segment of the South River between June and October 2001 (Appendix A, Tables A6 and A7). From upstream to downstream these locations are at Temple Street crossing, Duxbury (Station SR103) and upstream from the Route 3A bridge, Marshfield (Station SR102), upstream side of Veterans Memorial Park Dam fishway. These data are summarized below. Dissolved oxygen and percent saturation The DO in the South River at the Temple Street crossing (Station SR103) ranged from 1.9 to 6.0 mg/L with saturations between 23 and 57%. Further downstream, near the Route 3A bridge (Station SR102), DOs were much higher ranging from 5.7 to 7.5 mg/L with saturations between 66 and 80%. The data represent both pre-dawn and daytime measurements. Temperature The maximum temperature measured in this segment of the South River (26.4C) was taken at the Route 3A bridge (Station SR102). pH, hardness, and alkalinity The pH of the South River was lowest at the most upstream sampling location (Station SR103) ranging from 5.9 to 6.2 SU and slightly higher (6.3 to 6.4 SU) at the downstream sampling location (SR102). Hardness and alkalinity were low at both sampling location (21 to 25 mg/L and 9 to 11mg/L, respectively). Conductivity Specific conductance in this segment of the South River ranged from 189 to 212 S/cm. Ammonia-nitrogen No detectable concentrations of ammonia-nitrogen were found in this segment of the South River (exclusive of qualified data). Total phosphorus The total phosphorus concentrations measured in samples collected from this segment of the South River ranged from 0.058 to 0.080 mg/L (n=3) at the upstream sampling location and between 0.032 and 0.13 mg/L (average concentration = 0.07 mg/L) in the river near the Route 3A bridge. The Aquatic Life Use for this segment of the South River is assessed as support based primarily on the in-situ water quality data and best professional judgment. Although DO, DO saturation and pH measurements were low, these conditions are considered to be naturally occurring. This use is identified with an Alert Status, however, because of the somewhat elevated total phosphorus measurement. Moderate growth of aquatic plants, which may be in response to the elevated phosphorus, was recorded in the field sampling notes for sites along this segment of the South River, particularly in the impounded and slow-moving areas along the river. Primary and Secondary Contact RECREATION and AestheticsDWM conducted bacteria sampling (fecal coliform, E coli. and Enterococci) at two locations in this segment of the South River - Temple Street crossing, Duxbury (Station SR103) and at the Route 3A bridge, Marshfield (Station SR102) between June and October 2001 (Appendix A, Table A7). None of the fecal coliform bacteria counts exceeded 140 cfu/100 ml at either of the two sampling locations. Field observations were made by DWM personnel during the surveys conducted in the South River between June and October 2001. Some foam and algae were noted in the river near the Temple Street crossing (Station SR103). No objectionable conditions (odors, oils, trash/debris) were noted during any of the surveys in the river near Route 3A (Station SR102; MassDEP 2001a). The Primary and Secondary Contact Recreational and Aesthetic uses for this segment of the South River are assessed as support based on the fecal coliform bacteria data and the lack of aesthetically objectionable conditions. South River (MA94-08) Use Summary Table
* Alert Status issues identified, see details in use assessment section Directory: eea -> docs -> dep -> water -> resources -> 71wqar09 dep -> Charles D. Baker Governor dep -> Charles D. Baker Governor dep -> Charles D. Baker Governor dep -> Index of Photographs dep -> Department of environmental protection one winter street, boston, ma 02108 617-292-5500 water -> Water Resource Management Planning 71wqar09 -> 2004 water quality assessment report Download 3.32 Mb. Share with your friends:
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