Dyes Inlet 2015 DYES INLET WATERSHED Water Quality Monitoring Report Kitsap Public Health District

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Francine Lindsey
5 years ago
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1 DYES INLET WATERSHED 2015 Water Quality Monitoring Report Kitsap Public Health District 1

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3 2015 WATER QUALITY SUMMARY The Dyes Inlet watershed is designated as Primary Contact waters by the State is located in Central Kitsap County. Four of the nine streams show a long term improving water quality trend with the remaining streams showing stationary trends. Although Phinney creek has shown improvements in water quality over time bacteria levels are still elevated so the public health advisory will remain in effect in The Health District is continuing clean-up efforts in the watershed. Waterbody 2015 FC Bacteria GMV Met WQ Standard in 2015?* Long term trend Health Advisory? Barker Creek (BK01) 72 Part 1 only IMPROVING No Chico Creek (CH01) 27 YES STATIONARY No Clear Creek (CC01) 31 YES IMPROVING No Kitsap Mall Creek (KW01) 26 YES STATIONARY No Mosher Creek (MS01) 61 Part 1 only STATIONARY No Ostrich Bay Creek (OB01) 248 NO STATIONARY No Pahrmann Creek (PA01) 31 YES STATIONARY No Phinney Creek (PH01) 146 NO IMPROVING YES Strawberry Creek (SR01) 37 Part 1 only IMPROVING No Overall marine water 9 of of 15 (includes Dyes Inlet and Port stations Washington Narrows) * Stations Improving * Dyes Inlet watershed marine waters include Dyes Inlet and Port Washington Narrows. 3

4 HOW ARE WE DOING? Current Water Quality clean-up projects: Kitsap Public Health was awarded a Centennial Clean Water Fund grant from the Department of Ecology to conduct The Dyes Inlet Pathogen Reduction. The project began in 2012, and includes concentrating on pollution identification and reduction in Ostrich Bay Creek, Ridgetop Creek, the southern Dyes marine shoreline, and Kitsap Lake. Since the beginning of the project there have been 411 properties inspected, and 89 failing septic systems identified. Of these failing systems, 66 have been repaired. The project will be completed in Kristina Bonsell, Environmental Health Specialist Past Projects: Since 1990, on-site sewage system (OSS) sanitary surveys have been conducted in the Rocky Point/Marine Drive area, Tracyton, Erlands Point, and along the western shoreline of Dyes Inlet. 607 properties have been inspected, and 55 failing septic systems repaired as a result. From 2001 to 2005, the Kitsap Lake and Chico Bay Pollution Identification and Correction project was conducted in the Chico Creek watershed. 14 failing septic systems were corrected, which lead to part of Chico Bay being reopened for shellfish harvest. From 2004 to 2007, the Barker Creek Restoration Project, to address pollution in Barker Creek and the eastern shoreline area of Dyes Inlet. Found and corrected 7 failing septic systems. In 2005, the Dyes Inlet Restoration and Protection Project was initiated and includes the areas along Clear Creek, Ostrich Bay Creek, Phinney Creek, Chico Creek. Some sections of marine shoreline covered in previous projects were also revisited. These extensive surveys found 76 septic failures, and 79 problems with maintenance of private commercial storm water systems. 4

5 Shellfish Classification Upgrades PIC water quality projects have resulted in shellfish growing area upgrades. In 2003 DOH upgraded over 1498 acres in Dyes Inlet from Prohibited to Conditional. In 2008 there was another upgrade of 20 acres from Prohibited to Approved. 5

6 Dyes Inlet 2015 SHELLFISH CLASSIFICATIONS The following map shows shellfish growing areas and classifications of Dyes Inlet from the Washington State Department of Health. 6

Barker Creek met water quality standard in 2015 and statistical analysis for the creek shows a long term improving trend.

7 STREAMS WITH IMPROVING WATER QUALITY TRENDS BARKER CREEK (BK01) The headwaters of Barker Creek originate at Island Lake. The total length of the main channel and tributaries extend more than six miles. Barker Creek met water quality standard in 2015 and statistical analysis for the creek shows a long term improving trend. Barker Creek Annual FC GMV Year CLEAR CREEK (CC01) Clear Creek is composed of about 12 miles of streams and tributaries. The headwaters of Clear Creek originate at Naval Submarine Base Bangor, it flows through a variety of areas including agricultural properties, residential properties then through the urbanized area of Silverdale to its discharge point at the northern end of Dyes Inlet. Statistically analysis shows a long term improving trend. 200 Clear Creek Annual FC GMV

To protect the public from contact with Phinney creek, the public health advisory will remain in effect in 2016.

8 PHINNEY CREEK (PH01) Phinney Creek is a small year-round stream that flows north from the Kitsap Way area and discharges into Phinney Bay. Land use in the Phinney Creek drainage is urban residential, with commercial use along Kitsap Way. Water quality is very poor. To protect the public from contact with Phinney creek, the public health advisory will remain in effect in While Phinney creek has failed to meet water quality standards for the past several years the bacteria levels in the creek have been declining. Statistical analysis indicates a long term improving trend. Annual FC GMV Phinney Creek STRAWBERRY CREEK (SR01) Strawberry Creek is composed of approximately 3.8 miles of streams and tributaries that discharge into the northern end of Dyes Inlet. Statistical analysis for the creek shows a long term improving trend. 200 Strawberry Creek Annual FC GMV

The stations with statistically significant improving long term trends included:

9 MARINE WATER MONITORING DATA SUMMARY The map below shows the location of marine monitoring stations in Dyes Inlet. The stations with statistically significant improving long term trends included: DY07, DY20, DY24, DY25, DY27, DY28, DY29, DY31 and DY34. The remaining stations, DY05, DY14, DY15, DY33, DY37 had stationary trends. 9

10 MARINE WATER QUALITY STANDARDS Fourteen of the fifteen monitoring stations met water quality standards during the monitoring year. In addition, twelve of these exceeded the state marine water standard for temperature. These typically occurred during the summer months. OVERALL MARINE WATER QUALITY TREND Dyes Inlet Marine Water Summary Max 75% Median 25% Min Most Recent 12- Dyes Inlet marine waters as a whole show a stationary global trend because the trends are not equal at stations. Nine of the fourteen individual sampling stations (DY07, DY20, DY24, DY25, DY27, DY28, DY29, DY31, DY34) show a significantly improving long-term trend. 10

Dyes Inlet DYES INLET WATERSHED Water Quality Monitoring Report Kitsap Public Health District

Dyes Inlet DYES INLET WATERSHED Water Quality Monitoring Report Kitsap Public Health District DYES INLET WATERSHED 2014 Water Quality Monitoring Report Kitsap Public Health District 1 2 DYES INLET WATERSHED The Dyes Inlet watershed, designated as Primary Contact waters by the State, is located