COLVOS PASSAGE YUKON HARBOR WATERSHED

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1 COLVOS PASSAGE YUKON HARBOR WATERSHED 2014 Water Quality Monitoring Report Kitsap Public Health District 1

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3 COLVOS PASSAGE / YUKON HARBOR WATERSHED The Colvos Passage / Yukon Harbor (CP/YH) watershed, designated as Extraordinary Primary Contact waters by the State, is located in southeastern Kitsap County, as shown in the watershed map. The Health District began water quality monitoring in the watershed on a regular basis in Health District staff continue to perform clean-up projects in both watersheds WATER QUALITY SUMMARY Waterbody Long term trend Short term trend Meets WQ Standard? 2013 FC Bacteria GMV 2014 FC Bacteria GMV Health Advisory? Curley Creek (CY01) Fragaria Creek (FG01) Olalla Creek (OC02) Salmonberry Creek (SM01) Wilson Creek (WN01) No No No No No Overall marine water 1 9 of 10 Stations 1 CP/YH watershed marine waters include Yukon Harbor, Colvos Passage, and Puget Sound WATER QUALITY IMPROVEMENT EFFORTS HEALTH DISTRICT WATERSHED PIC PROJECTS The Shellfish Restoration and Protection Project funded by a grant from the Environmental Protection Agency began in late 2010 and ended December 31, The purpose for this grant was to protect Approved shellfish growing areas along Colvos Passage and Yukon Harbor. This was accomplished by completing four shoreline surveys. There were 40 hot spots identified. All were investigated, with 19 onsite septic system failures found and repaired. Other sources included wildlife, storm water system, or pet 3

4 waste. There were 168 property inspections completed during this project in Colvos and Yukon harbor. The Enhanced Implementation of the Pollution Identification and Correction project for Upper Yukon Harbor watershed began in 2012 and ended in This project includes pollution identification and correction activities of upland properties that may be impacting the shoreline areas of Yukon Harbor. There were 207 property inspections completed with 11 onsite septic system failures identified with the majority of the systems being repaired or in the process of getting repaired. 4

5 WASHINGTON STATE WATER QUALITY ASSESSMENT: LISTED PARAMETER(S) AND CATEGORIES Curley Creek Dissolved Oxygen (5), Fecal coliform bacteria (5), Temperature (5), Duncan Creek Dissolved Oxygen (5), Fecal coliform bacteria (5) Salmonberry Creek Dissolved Oxygen (5), Fecal coliform bacteria (5) Olalla Creek Dissolved Oxygen (5) Wilson Creek Dissolved Oxygen (5), Fecal coliform bacteria (5) SHELLFISH CLASSIFICATIONS An increase in harvestable shellfish growing areas around Fragaria and Prospect Point was issued by the Washington State Department of Health. This was due to efforts associated with the EPA Shellfish Restoration & Protection project acres of Prospect Point and 17.9 of Fragaria were upgraded from Prohibited to Approved. These upgrades were in the Addendum to the 2009 Sanitary Survey of the Colvos Passage Shellfish Growing Area Fragaria and Prospect Point prepared by WA State DOH in November In Yukon Harbor, a permanent shellfish closure zone exists around the discharge pipe from the Manchester sewage treatment plant, located between the Manchester dock and the Navy fuel depot. On Blake Island, there is a Prohibited area on the eastern side of the island near the marina, and the rest of the island is classified as Approved or Conditionally Approved. Maps of shellfish closure areas are available on the Washington State Department of Health Website. For specific information on shellfish classifications in the Yukon Harbor area, see the most recent report from the State Department of Health. 5

6 INDIVIDUAL STREAM DATA CURLEY CREEK The headwaters of Curley Creek are located at the north end of Long Lake. The stream flows for approximately five miles from Long Lake discharging into Yukon Harbor. Land use in the Curley Creek drainage is a combination of rural residential and agricultural. Current water quality is good. Statistical analysis for the creek shows short and long term stationary trends. Curley Creek monitoring station CY01 FRAGARIA CREEK Fragaria Creek originates west of the small waterfront community of Fragaria. Two tributaries, one from the north and the other from the southwest join together about a quarter mile from the creek s discharge point along the west shore of Colvos Passage. Land use in the Fragaria Creek drainage is rural residential. Water quality over the last year has been very good, and the stream meets the state water quality standard. Statistical analysis for the creek shows both long and short term stationary trends. Fragaria Creek downstream of monitoring station FG01 near Fragaria Road 6

7 OLALLA CREEK Olalla Creek is four miles long flowing southeast of Long Lake and entering Colvos Passage at the community of Olalla. Land use in the Olalla Creek drainage is predominately rural residential and agricultural. Water quality over the last year has been good. Statistical analysis for the creek shows an improving long term trend. Olalla Creek at monitoring station OC02 upstream of Forsman Road Olalla Creek Annual Fecal bacteria GMV Year 7

8 SALMONBERRY CREEK Salmonberry Creek originates northwest of Yukon Harbor and flows south to its discharge point along the west shoreline of Long Lake. Land use in the Salmonberry Creek drainage is predominately a combination of rural residential and agricultural. Water quality over the last year has been very good. Statistical analysis for the creek shows an improving long term trend and stationary short term trend. Salmonberry Creek monitoring station SM01 downstream of Clover Valley Road. Salmonberry Annual Fecal bacteria GMV Year 8

9 WILSON CREEK Wilson Creek originates just north of Overra Road in southern Kitsap County and flows east to its discharge point into Colvos Passage at Driftwood Cove. Land use in the Wilson Creek drainage is predominately rural residential. Health District staff have been working in the Wilson Creek watershed for the past few years as part of the Shellfish Restoration and Protection project. Statistical analysis shows an improving long term trend. Wilson Creek monitoring station WN01 Wilson Creek Annual Fecal bacteria GMV Year 9

10 MARINE WATER MONITORING DATA SUMMARY Please see the watershed map for specific marine water monitoring station locations. MARINE WATER MONITORING STATIONS TREND ANALYSIS Improving Trend CP06, PS22 Stationary Trend CP01, CP02, CP03, PS15, PS16, PS17, YH01, YH02 MARINE WATER QUALITY STANDARDS VIOLATIONS Nine of ten marine stations in this watershed met the state water quality standard for fecal coliform bacteria during the monitoring period. The state temperature standard was exceeded at several stations. OVERALL MARINE WATER TREND Colvos Passage/Yukon Harbor marine waters as a whole show a significant global trend. Two of ten individual stations (CP06 and PS22) showed a significant improving long-term trend. COLVOS PASSAGE / YUKON HARBOR MARINE WATER Max 75% Median 25% Min Most Recent 12 Sample Geometric Mean 10