4. Affected Environment Consistent with FAA Order 5050.4B, Paragraph 706 e, this chapter “…describes only those environmental resources the proposed action and its reasonable alternatives, if any, are likely to affect” (FAA Order 1050.1E, Change 1, paragraph 405e). Two resource categories identified in Appendix A of FAA Order 1050.1E, Change 1, Coastal Resources and Wild and Scenic Rivers, are not present in the project area and thus would not be affected by the Proposed Action and its alternatives. Therefore, these resources are not discussed in this chapter. 4.1 Project Location Hillsboro Airport is located in the city of Hillsboro in Washington County, Oregon, approximately 2 ¼ miles from Hillsboro city center and 12 miles west of downtown Portland (Exhibit 4-1). The Airport and surrounding Port-owned property occupy approximately 965 acres of land. The Airport is generally bound by NE Brookwood Parkway to the east, NE 25th Avenue to the west, NW Evergreen Road to the north, and NE Cornell Road to the south. The Airport is owned and operated by the Port of Portland. While the Airport is located almost entirely within the city of Hillsboro, it is located on the northern boundary of the city, and Port- owned lands north of NW Evergreen Road are within unincorporated Washington County. 4.2 Noise Exhibit 4-2 shows the existing (2007) day-night average sound level (DNL) contours used by the federal government to assess the significance of noise impacts and to establish land use compatibility guidelines. According to FAA guidelines (see Section 5.2) most land uses are compatible with sound levels of DNL 65 A-weighted decibels (DNL 65 dBA, herein referred to as DNL 65) or less. The State of Oregon also requires the disclosure of noise levels down to DNL 55. The noise contours shown in Exhibit 4-2 reflect the typical patterns of runway and flight track use for fixed wing and helicopters at HIO. Runway 12/30 accommodates over 90 percent of the aircraft takeoffs and landings at HIO, as indicated by the extent of the noise contours along its northwest to southeast runway alignment. Appendix C.1 shows the runway use and flight track assumptions used to develop these contours. The shape of these contours, wider to the northwest and longer and thinner to the southeast, is consistent with the most common direction of runway operations; landings from the southeast and takeoffs to the northwest. 4.3 Compatible Land Use This section provides an overview of existing and planned land use in the vicinity of the Airport; generally the area in or near the Airport’s aircraft traffic pattern. 4-1 HILLSBORO AIRPORT PARALLEL RUNWAY 12L/30R ENVIRONMENTAL ASSESSMENT S LEGEND W W N Source: W GL N O R 1.AEX and ESRI (2006) E C E D 2. ODOT (2007) 3. Metro RLIS (2008) \\ROSA\PROJ\PORTLANDORPORTOF\376585\GIS\MAPFILES\EFFECTED_ENVIRONMENT\HIO_VICINITYMAP.MXD MSULLIV4 5/26/200911:23:20 O A K K N W W 219 S T S 1ST AVE N 1ST AVE SC S O Port Property E O T C A H H K K C S S H T E E U N R B E 5TH AVE C A H H S E NE JACKSON SCHOOL RD R L I D N E E S T NW JAC SE 10TH AVE KSON SCH OO 8 L R D 0 0.25 0.5 0.125 Miles 12R E E M N A W W I N N E N S W W 2 V T E M R E G E R K K E R E N D N N W W R D S U 30L N S E OREGON Yamhill T County 26 20 H W Y N B Hillsboro E R O O K W D D Airport O O P K W Washington Y County SW BROOKWOOD AVE N E E C Hillsboro O R N Columbia E Multnomah VICINITY MAP County L EXHIBIT 4-1 Vicinity Map County HillsboroAirport Parallel Runway 12L/30R EnvironmentalAssessment L L NW SHUTE RD NE SHUTE RD N R W HE D LV ETI W W A R 30 D 5 B A S 5 E 405 L N 205 I W W N E E Portland N W R W WASHINGTON 26 E 205 D 84 E NW 231ST AVE S V T Clackamas E U County R N G I 84 O County R Clark N E E N N R P D K W Y RUR IND RUR Me ek R RUR d LEGEND Schools and Childcare Facilities RUR d R Library l l 26 o o h Arterial Roads c RUR S Gordon Faber n n RUR o Recreation Historic Site s k RUR Complex c MUE a J Evergreen Special Port Property Industrial IND Evergreen Special District Industrial District RUR Park RUR Evergreen Rd Evergreen Rd Evergreen RUR OKHA Estates Evergreen Pkwy Open Space MUE 55 Noise Level Emma Jones COM SFR Natural 75 DNL 60 and below Contour Hillsboro Evergreen MS MFR 75 ES Area SFR DNL 65 and above Contour SFR Glencoe at Lori 60 Glencoe at Lori 1 Glencoe at Lori 2 Glencoe Creek Park Zoning Class Glencoe at Aurora Jones Farm Property IND 65 Industrial (IND) Glencoe at Estate Drive 70 Commercial (COM) Glencoe MUE Jackson ES High Mixed Use Employment (MUE) School Jones Farm Open Space y Mixed Use Residential (MUR) w k MUE 70 P Dawson Creek Park Multi Family (MFR) Sundown d o Dawson Creek Apartments Creek 1 o Single Family (SFR) w k Sundown Griffin Oaks Park o Rural (RUR) o Creek 2 Jackson r SFR d B School R 55 l l IND Open Space o SFR o h c S 75 n n o MUE s Chardonnay 1 k c Central Park Rosebay a SFR J Park PF Chardonnay 2 SFR Mooberry ES UJ Hamby Park MFR MUR SFR Cornell Rd d Cornell Place Open Space Cornell R MFR Dawson at Cornell IND MFR SFR Cornell Rd Hillsboro y w MUE High School Washington COM k MUE P e JW Poynter MS COM Orenco v Field County d A Eastman Garden Park Hare Field o Gardens 1 o t t Fairgrounds s Boscow ES w 1 SFR k o Orenco Gardens 2 o MFR r B e IND v MUR A SFR Shadywood Park 28th Ave Sports Complex Orenco Gardens 3 MUR Bagley Park h t Dolezal 231st Ave 5 Sewell Orenco Gardens 4 JB Thomas MS Hillwood 1 Station IND Open Space SFR Soloflex Hidden Creek North 000.25 .5 Hillwood 2 MFR PF North Orenco Meadows Miles Hillsboro Main St MUR 53rd Hidden Creek North MFR Civic SFR Ave Ackerman Park Center Bicentennial Park Park Hidden Creek South e Tuality v Main SFR Deer Run EXHIBIT 4-2 A St Baseline S COM Existing Noise and Land Use t Senior Park h Candlewood t MUR MUR COM MUR 0 MFR Stonebriar Hillsboro Airport Parallel Runway 1 MUR Soloflex South SFR - Tract F 12L/30R Environmental Assessment \\ROSA\PROJ\PORTLANDORPORTOF\376585\GIS\MAPFILES\EFFECTED_ENVIRONMENT\HIO_EXISTINGNOISEANDLANDUSE.MXD PGRONLI 9/29/2009 06:47:03 4.3.1 Existing Land Use and Development Exhibit 4-2 shows that HIO lies along the northern edge of Hillsboro’s urbanized area near the southwestern end of a broad corridor of industrial development extending to the northeast along the Brookwood Parkway. Areas to the west and south of this corridor are generally developed in residential uses with commercial development at the intersections of major roadways. Areas to the north and west of this corridor remain in generally agricultural uses. Areas to the north and east include the 534-acre Evergreen Special Industrial District, which has been added to the Urban Growth Boundary to provide industrial land capacity. Exhibit 4-2 also shows schools, libraries, parks and recreational areas, and known historic sites within this area. 4.3.2 Land Use Plans and Regulations Zoning is the means by which municipalities define the specific type of uses that are permitted on a given piece of land. These uses are identified and governed by the enacting of local zoning ordinances. The City of Hillsboro and Washington County are the two municipalities that have jurisdiction on the lands in the immediate areas surrounding HIO. A discussion of zoning patterns around HIO follows. Currently, the land to the north of the airfield is mostly zoned as rural. The rural zoning classification is comprised of a combination of permitted uses including exclusive farm use, with an 80-acre minimum lot size; agriculture and forestry, with an 80-acre minimum lot size; and future development, with a 20-acre minimum lot size. The land to the east of the Airport is mostly zoned as mixed-use employment. The mixed-use employment zoning is an employment district that generally allows for offices, retail stores, warehouse distribution, and light industrial activities. The land immediately south of the Airport is zoned as commercial. Residential zoning is located further south and southwest of the commercial area. The residential zoning closest to the Airport contains established medium-density neighborhoods with limited available space for future residential infill. A second large area zoned mixed-use employment is located to the southeast. The land west of the Airport is similar to the land east of the Airport and consists of mixed-use employment and residential. The residential zoning closest to the Airport contains established medium-density neighborhoods with limited available space for future residential infill. The area of mixed use employment lies directly along the western edge of the Airport property, while the residential areas are farther to the west and consist mostly of single and multi-family homes.