Chapter 9 – Laboratory Monitoring, Sampling, And
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CHAPTER 2 Planning Information PLANNING INFORMATION – Planning Information 2.1 Planning Area The City’s UGA and Master Plan (year 2065) Service Areas are presented in Figure 2-1. The UGA was established by the City's Planning Department and Citizen Advisory Committee as part of planning activities undertaken to meet the requirements of the State of Washington Urban Growth Management Act (GMA). The current UGA was adopted by the Benton County Commissioners in 2005. The Master Plan Service Area anticipates the development over the next 50 years in the Badger South area toward Interstate 82 and Interstate 182 in the southwest, and reclamation of former 300 Area land in the Hanford Area to the north. 2.2 Service Area The current Service Area Boundary (commensurate with the UGA) is presented on Figure 2-1 and represents the area that the existing system of interceptor sewers, trunk sewers, collection system, and pumping stations effectively serve. Development within the City currently trends toward the south, being limited on the east by the City of Kennewick, the west by the City of West Richland, and the north by the Hanford Area. Future development is expected to continue a south and northwest directional trend. The City's current infrastructure maintenance, rehabilitation and replacement program will help to encourage build-out of the developed territory in the City's interior. Future population increases are anticipated to be significant in the south service area with the addition of the Badger South residential development. 2.2.1 Onsite Sewer Systems The Benton Franklin Health District (BFHD) has primary responsibility for permitting and policing the residential and small flow commercial dischargers using onsite sewer systems within the City’s UGA. The City’s Sewer User Ordinance mandates that residents within the City limits connect to the public sewer system when service is available. In practice, this has only been enforced by requiring the property owner to connect in the event of onsite sewer system failure. Enforcement procedures for onsite sewer system failure are under the jurisdiction of the BFHD. In the event of an onsite sewer system failure, the BFHD Health Officer has the discretion to mandate either hook-up to the public system or onsite sewer system repair or replacement. The current Service Area and the UGA include only a few small areas in the southern portions of the City where onsite sewer systems are currently the primary means of wastewater disposal. These areas are typically low density developments which predate the southerly expansion of the City’s corporate boundaries. An estimated 700 people currently utilize septic tanks and drain fields as a method to dispose of their wastewater. J-U-B ENGINEERS, INC. // CITY OF RICHLAND – 2015 GENERAL SEWER PLAN UPDATE // APRIL 2016 Page 2-1 City of Richland 2015 General Sewer Plan = ! Wastewater Treatment Plant FOWLER ST Figure 2-1 Water Treatment Plant Service Area Boundaries = ! TAPTEAL DR = ! BELLERIVE DR SR 240 = ! Legend = ! City Limits GAGE BLVD COLUMBIA PARK TRL I-182 = ! LESLIE RD BROADMOORST UGA = ! = ! GEORGE WASHINGTON WAY ST SAINT 50-yr Planning REATA RD REATA RACHEL RD RACHEL AARON DRAARON ENGLEWOOD DR ENGLEWOOD Interstate/Highway MCMURRAY ST MCMURRAY STEVENS DR WELLSIAN WAY JADWIN AVE = ! Major Streets = ! WILLIAMS BLVD WILLIAMS THAYER DR KEENE RD Rail Road Track I-82 WRIGHT AVE LEE BLVD WESTCLIFFE BLVD BATTELLE BLVD BATTELLE DUPORTAIL ST Irrigation Canal/Pipeline = ! SHOCKLEY RD SHOCKLEY HORN HORN RAPIDS RD = ! DUPORTAIL ST = ! BY-PASS HWY Columbia River Yakima River KINGSGATE WAY QUEENSGATE DR VAN GIESEN ST VAN != City Lift Stations KENNEDY RD I-182 S. GUM ST. GUM S. S. WASHINGTON ST. WASHINGTON S. TWIN BRIDGES RD = ! I-82 SR 240 0 6,000 12,000 Feet . Date: Apr 1, 2016 PLANNING INFORMATION 2.3 Service Area Characteristics 2.3.1 Topography Richland is situated in a river valley between two hill plateaus. The Columbia River forms the City’s eastern boundary. The Yakima River runs along the City’s western boundary and then east through the City and into the Columbia River. Because Richland is within a river valley, it is relatively flat in the central and north parts of the City. South of the Yakima River, elevations increase significantly (around Badger Mountain). 2.3.2 Climate The climate of the area is semiarid, characterized by low annual precipitation and large inter-seasonal temperature variations. Strong winds from the west and southwest occur throughout the year and are responsible for localized soil movement and excessive evapotranspiration rates in summer. Annual precipitation seldom exceeds ten inches, with much of the total arriving with summer thunderstorms, which can cause flooding and severe erosion. The recent (2009 - 2013) climatological information for the City is summarized in Table 2-1. Table 2-1 – Climatological Data Average Temperature High Temperature Low Temperature Rainfall Year (°F) (°F) (°F) (in) 2009 65 105 5 6.2 2010 65 101 5 9.2 2011 64 97 14 5.0 2012 66 105 17 11.3 2013 68 108 13 7.3 2014 64 104 6 5.0 2.3.3 Geology The geology of the Service Area relates to the long history of volcanic activity, which has influenced the Columbia Basin. At the surface is a layer of unconsolidated alluvial and glaciofluvial materials ranging in depth from 0 to 120 feet. The depth of this overburden generally does not exceed 30 feet within the Richland Sewer Service Area. The overburden rests on a thick series of basaltic strata known as the Columbia River basalts, each of which may consist of many distinct basalt flows. These basalts are interbedded with two major and many minor sedimentary strata. The uppermost basalt unit, the Saddle Mountain basalt, crops out in places where the overburden thins in the upper elevations of the Richland planning area. The Saddle Mountain basalt ranges in thickness from 125 to 625 feet, but it is typically about 250 feet thick. It may be interbedded with many sedimentary strata, some of which are up to 50 feet thick. The Saddle Mountain basalt is separated from the Wanapum basalt by the Mabton Interbed. The Mabton Interbed is composed of clay and siltstone and ranges in thickness from 10 to 75 feet, with a typical thickness of 45 feet. The Wanapum basalt ranges in thickness from 600 to 1200 feet, with a typical thickness of 800 feet. Interbedding sedimentary strata are insignificant in the Wanapum basalt. The Vantage sandstone interbed, averaging about 25 feet in thickness, separates the Wanapum basalt from the underlying Grande Ronde basalt. The Grande Ronde basalt has a typical thickness of 5,000 feet, but may range from 2,000 to 12,000 feet thick. The J-U-B ENGINEERS, INC. // CITY OF RICHLAND – 2015 GENERAL SEWER PLAN UPDATE // APRIL 2016 Page 2-3 PLANNING INFORMATION Grande Ronde basalt contains almost no interbedding sedimentary strata. Under the Grande Ronde basalt lies additional basalt groups, the Pre-Yakima and the Pre-Columbia River basalts. Locally significant hydrogeologic units occur in the Saddle Mountain and Wanapum basalts, in the Mabton Interbed, and in the overburden where its depth is sufficient. 2.3.4 Soils The soils in and around Richland are classified by the U.S. Department of Agriculture, Natural Resource Conservation Service (NRCS). Most of the Richland area soils are classified as being silt and sandy loam. Figure 2-2 depicts the types of soils within the City’s sewer service area. The soils are generally well draining. J-U-B ENGINEERS, INC. // CITY OF RICHLAND – 2015 GENERAL SEWER PLAN UPDATE // APRIL 2016 Page 2-4 City of Richland 2015 General Sewer Plan FOWLER ST Figure 2-2 Soils TAPTEAL DR BELLERIVE DR SR 240 Legend GAGE BLVD City Limits COLUMBIA PARK TRL I-182 LESLIE RD BROADMOORST UGA GEORGE WASHINGTON WAY ST SAINT 50-yr Planning REATA RD REATA RACHEL RD RACHEL AARON DRAARON ENGLEWOOD DR ENGLEWOOD Interstate/Highway MCMURRAY ST MCMURRAY STEVENS DR WELLSIAN WAY JADWIN AVE Major Streets WILLIAMS BLVD WILLIAMS THAYER DR KEENE RD Soil Type I-82 WRIGHT AVE LEE BLVD WESTCLIFFE BLVD BATTELLE BLVD BATTELLE Fine Sandy Loam DUPORTAIL ST SHOCKLEY RD SHOCKLEY HORN HORN RAPIDS RD Gravel Pits BY-PASS HWY DUPORTAIL ST Loamy Fine Sand KINGSGATE WAY QUEENSGATE DR VAN GIESEN ST VAN Loamy Sand KENNEDY RD Rock Loamy Fine Sand Silt Loam I-182 Stony Fine Sandy Loam Very Fine SandyST. GUM S. Loam S. WASHINGTON ST. WASHINGTON S. TWIN BRIDGES RD I-82 Very Stony Silt Loam Riverwash No Digital Data Available SR 240 Notes: 1. Soil Type is based on Soil Survey Geographic (SSURGO) database for Benton County, by the U.S. Department of Agriculture, Natural Resources Conservation Service (NRCS) Publication dated 09-03-2014. 0 6,000 12,000 Feet . Date: Apr 1, 2016 PLANNING INFORMATION 2.4 Irrigation Districts Separate irrigation water is only provided for the part of the City that is south of the Yakima River. Those north of the river use City water for irrigation – with a few minor exceptions. There are small irrigation systems serving the following areas: Columbia Point: A pump station on the Columbia River provides irrigation to the Columbia Point Golf Course and some multi-family housing units adjacent to the golf course. Horn Rapids: A pump station on the Columbia River that serves the Horn Rapids Golf Course, a residential subdivision, sports complex, ORV Park, Landfill, and some farmlands. Research District: Two wells owned by the City that serves some commercial and light industrial areas. Richland School District: A well located on the grounds of Carmichael Middle School which serves the middle school and adjacent Richland High School.