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15-16-18 Mile Creek - Niagara Peninsula Conservation Authority

15-16-18 Mile Creek - Niagara Peninsula Conservation Authority

Figure 12: Municipal

Figure 12: Municipal drains 24

and no presence of trout or salmon present. A Type E drain also has a permanent flow with warm water temperatures and top predators (e.g., largemouth bass, northern pike, muskellunge and crappie) present in the drain. Type F drains are characterized by intermittent flow (Fisheries and Oceans Canada No Date). This classification system has been created for use by municipal drainage superintendents for the purpose of drain maintenance. Therefore, the classification assigned to a drain is subject to change frequently. Monthly grab samples are collected at 3 monitoring stations located at the outlet of each watershed to capture cumulative water quality impacts. These stations are Fifteen Mile Creek station FF001, Sixteen Mile Creek station SX001, and Eighteen Mile Creek station ET001 (Table 5). Monthly grab sampling at station FF001 was initiated in 2003, and monthly grab samples at stations SX001 and ET001 was initiated in 2006. The locations of the water quality monitoring stations are illustrated on Figure 13. As illustrated on Figure 12 the drains in the Fifteen-Sixteen- Eighteen Mile Creeks watershed include Keenan Drain, which has been classed as a Type C drain and the Fifteen Mile Creek Drain system is currently classed as both Type C and F. Water Quality Surface water quality is monitored by the NPCA in the Fifteen- Sixteen-Eighteen Mile Creeks watershed through the collection of grab samples on a monthly basis during the ice-free season and analyzed for several parameters including nutrients, metals, bacteria, suspended solids, and general chemistry. The indicator parameters summarized in Table 4 are the most useful in assessing relative stream quality. They include: total phosphorus, nitrate, copper, lead, zinc, Escherichia coli, chloride, suspended solids and benthic invertebrates (NPCA 2006). Table 4: water quality parameters (as modified from NPCA 2006) CATEGORY INDICATOR PARAMETER OBJECTIVE REFERENCE Nutrients Total Phosphorus 0.03 mg/L PWQO (MOE 1994) Nutrients Nitrate 13 mg/L CWQG (CCME 2003) Metals Copper 0.005 mg/L PWQO (MOE 1994) Metals Lead 0.005 mg/L PWQO (MOE 1994) Metals Zinc 0.02 mg/L PWQO (MOE 1994) Microbiological Escherichia coli 100 counts/100mL PWQO (MOE 1994) Other Chloride 100 mg/L CWQG (CCME 1995) Other Suspended Solids 25 mg/L BC MOE (2001) Biological Benthic Invertebrates Unimpaired BioMAP (Griffiths 1999) 25

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