Volume 2: Draft Gorst Planned Action Environmental Impact Statement

GORST PLANNED ACTION EIS | AFFECTED ENVIRONMENT, SIGNIFICANT IMPACTS, AND MITIGATION MEASURESSpecifically, areas in the City of Bremerton Utility Lands and near Heins and Jarstad creeks are highly important forwater flow processes and are subject to relatively low degradation and pollution generating impervious surfaceand stormwater runoff (City of Bremerton 2012).Areas of lower relative importance for water flow processes but also have relatively low levels of degradation arelocated west of the City of Bremerton Utility Lands and north of the golf course and the headwaters of Gorst andParish creeks (City of Bremerton 2012). Generally, due to these conditions, these areas require a relatively lowlevel of active management, provided that land uses and activities are not allowed to degrade processes The areasnear the Gold Mountain Golf Club, along the Gorst Unnamed Tributary 1, and the Gorst UGA area areas identifiedby the model that require the most active management (City of Bremerton 2012). They denote areas which have arelatively high importance to water flow processes but are highly degraded. These are focal areas for activemanagement.The model maps these areas as of relatively low importance to the water flow process and high degradation. In thecontext of model output results (City of Bremerton 2012), these are typically areas within which continueddevelopment will have the least effect on water flow processes, as compared to other locations within thewatershed. These areas include portions of the SKIA UGA, and the Sunnyslope Area.Gorst UGAWaterWater (drinking) in the Gorst UGA is supplied by the City of Bremerton. Water mains are located along W BelfairValley Road, W Frone Drive, Feigley Road W, West Sherman Heights Road, SR 3, and SR 16. Most water mains wereinstalled between 1986 and 1990. A few water lines, such as those along West Sherman Heights Road, wereinstalled in 1940.The Kitsap County CFP (August 2012) coordinates water improvements planned by the County, cities, and specialdistricts. Within the Gorst UGA, the City of Bremerton identified the following improvement:• Project #2 – 36” Transmission Main McKenna Falls to GorstWastewaterIn 2010, a wastewater (sanitary sewers) collection system was built in the Gorst UGA. Wastewater is conveyedthrough several 8-inch gravity mains located along W Belfair Valley Road, W Frone Drive, Feigley Road W, SR 3, andSR 16. These mains tie into two sewer pump stations and an 18-inch force main that connects to a wastewatertreatment plant on Oyster Bay Avenue in Bremerton. As previously described in Section 3.2 Water Resources,Kitsap County Public Health found 7 water quality hotspot areas in the Gorst UGA. After the wastewater collectionsystem was constructed in 2010, 6 of the 7 areas were downgraded to a level of no significance. A total of 125residences and commercial properties have connected to the Gorst wastewater system as of August 2011.Remaining parcels in the UGA manage wastewater through on-site septic systems. The high ground water andpoor draining soils in the area tend to cause septic systems to fail prematurely, resulting in the discharge ofuntreated sanitary sewage into Gorst Creek and its tributaries (City of Bremerton 2009).The Kitsap County CFP (August 2012) coordinates wastewater improvements planned by the County, cities, andspecial districts. Within the Gorst UGA, the City of Bremerton identified the following improvement:• Project #1 – Pump Station SB 3 (Gorst) Upgrade: 2019-2025 periodStormwaterSimilar to facilities in the greater watershed, stormwater facilities in the Gorst UGA consist primarily of roadsidedrainage ditches with culverts located at road crossings. In addition, most of the UGA near the Sinclair Inlet isdeveloped, with two highways and several commercial developments. Stormwater in these areas is impounded orDraft | June 2013 3-224