Sewer Study for the City of Ontario Sphere
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SECTION 3 STUDY AREA 3-1 Purpose This section describes the study area of the Water Master Plan, discusses the land uses and population estimates within the study area that are utilized in estimating the water demands. 3-2 Location The City of Manhattan Beach (City) is located on the western edge of Los Angeles County, approximately 22 miles southwest of downtown Los Angeles. The City’s regional location is depicted on Figure 3-1. The City encompasses approximately 3.9 square miles of residential, commercial, and industrial land. It is a coastal community bounded by the approximately 2 miles of beach frontage to the west. Manhattan Beach is bordered by the City of El Segundo to the north, the Cities of Hawthorne and Redondo Beach to the east, and the Cities of Redondo Beach and Hermosa Beach to the south. Manhattan Beach is centralized between several Southern California highways, providing easy access into the City. The Century Freeway (I-105) is located to the north. The San Diego Freeway (I-405) and Artesia Freeway (SR-91) are located to the east. The major roads within the City include Ocean Drive, Highland Avenue, Valley Drive, Sepulveda Boulevard, Aviation Boulevard, Rosecrans Avenue, Marine Avenue, Manhattan Beach Boulevard, and Artesia Boulevard. 3-3 Topographical Description The characteristic topography of Manhattan Beach is a series of peaks and valleys throughout the City. The highest point in the City is located near the intersection of Sepulveda Boulevard and Longfellow Drive and reaches 235 feet above mean sea level (amsl). The lowest ground elevation is 0.0 ft, along the beach frontage. The areas near the highpoint, east of Ardmore Drive, are considerably higher than the remainder of the City. To provide the required pressures in the water system, a high pressure zone was created in this area. 3-4 Geology The Los Angeles County Department of Public Works (LACDPW) Hydrology and Sedimentation Appendix provides information on the soil characteristics within Los Angeles County. This document shows that the City is primarily located on Oakley fine sand (Soil Type 10). Chino Silt Loam (Soil Type 3) is found from the beach front to Valley Drive and Grandview Avenue. Montezuma Clay Adobe (Soil Type 9) and Ramona Sandy Loam (Soil Type 14) can be found on the northeast portion of the City. The soil classifications are illustrated on Figure 3-2. 3-5 Climate The study area has a Mediterranean climate, enjoying plenty of sunshine throughout the year, with an average of 263 sunshine days and only 35 days with measurable precipitation annually. The period of April through November is warm to hot and dry with average high temperatures of 71 - 79°F and lows of 50 - 62°F. 3-1 City of Manhattan Beach R:\Reports\Manhattan Beach\Water Master Plan Water Master Plan City of Los Angeles City of ¨¦§405 Inglewood Century Blvd Los Angeles International Airport Lennox 105 Imperial Hwy ¨¦§ 120th St 1 St Nash Del Aire City of Hawthorne City of El Segundo Blvd El Segundo ¨¦§405 Rosecrans Ave Hawthorne Blvd Highland Ave Ocean Dr Marine Ave Valley Dr City of Ardmore Ave Blvd Aviation Lawndale Prairie Ave Prairie Manhattan Beach Blvd City of Manhattan SepulvedaBlvd Beach Artesia Blvd Ave Inglewood Redondo Beach Blvd Pacific Ocean 91 City of Hermosa City of Beach Redondo Beach Hermosa Ave 190th St 107 Del Amo Blvd City of Torrance Anza Ave Anza Torrance Blvd ³ Blvd Hawthorne 0 2,500 5,000 10,000 CITY OF MANHATTAN BEACH Feet WATER MASTER PLAN 1" = 5,000' PROJECT NO: 1640901.20 Regional Location Map DATE: April 2010 Figure 3-1 City of 45TH ST El Segundo 44TH ST CREST DR 43RD ST 42ND ST 41ST ST City of 40TH ST 39TH ST ROSECRANS AVE Hawthorne 36TH PL 38TH ST 36TH PL 36TH ST PARKVIEW AVE BAYVIEW36TH DR ST 35TH PL HIGHLAND35TH AVE ST 35TH ST AVE OAK MARKET PL VILLAGE DR ELM AVE ELM VISTA DR 33RD PL FAIRWAY DR OCEAN DR 34TH ST 33RD ST AVE PINE BELL AVE 31ST PL 33RD ST REDONDOAVE WALNUT AVE WALNUT 31ST ST WAY CEDAR CHATHAM BELL AVE 30TH ST PALM AVE PALM POINSETTIA AVE POINSETTIA 30TH ST PARK PL MANHATTAN AVE 29TH ST AVE MAPLE VALLEY DR 29TH PL 27TH ST 28TH ST WAY CARLOTTA 26TH ST VILLAGE CIR 26TH PL BLANCHE RD LAUREL AVE LAUREL ALMA AVE 25TH ST MARINE AVE CIR SAUSALITO 23RD ST 23RD PL AVE PINE 23RD ST MARINE PL PALM AVE PALM 21ST ST 24TH ST 21ST PL 19TH ST JOHN ST OAK AVE OAK 23RD ST AVE ELM 19TH ST CEDAR AVE CEDAR 21ST PL 18TH ST AVE HERRIN AGNES RDAGNES 18TH ST 20TH PL AVIATION BLVD AVIATION LAUREL AVE LAUREL 17TH ST Pacific Ocean 19TH PL 17TH ST 17TH ST City of 18TH PL AVE FAYMONT 14TH ST AVE MEADOWS 15TH ST MANZANITA LN MANZANITA 17TH PL 15TH ST DR LYNNGROVE THE STRAND 12TH CT 12TH ST Redondo 16TH ST 14TH ST 12TH ST 13TH ST AVE PINE MANHATTAN BEACH BLVD 12TH ST Beach CHESTNUT AVE CHESTNUT MAGNOLIA AVE MAGNOLIA 12TH ST AVE PACIFIC 11TH ST 13TH ST 11TH PL JOHN ST 10TH ST ARDMORE AVE CENTER PL BLVD SEPULVEDA 9TH ST AVE PECK 11TH PL10TH PL 9TH PL 8TH ST AVE REDONDO 10TH ST 8TH PL 9TH ST PL PACIFIC 6TH ST DIANTHUS ST 8TH ST STHARKNESS ROWELL AVE ROWELL 7TH ST JOHNSON ST 5TH ST 5TH ST 5TH PL JOHN PL 3RD ST CREST DR 6TH ST 4TH PL 3RD ST 3RD ST LARSSON STLARSSON 5TH ST 3RD PL AVE POINSETTIA 2ND ST 2ND PL 1ST PL 4TH ST 1ST ST RONDA DR 1ST ST AVIATION PL AVIATION 3RD ST DUNCAN PL GATES AVE 1ST ST GATES AVE DUNCAN AVE CURTIS AVE 1ST PL CURTIS AVE HOMER ST BOUNDARY PL FRANCISCO ST HERRIN ST Legend VOORHEES AVE KUHN DRKUHN RUHLAND AVE KEATS ST SHELLEY ST NELSON AVE Oakley Fine Sand (Soil Type 10) TENNYSON ST City of MATHEWS AVE Chino Silt Loam (Soil Type 3) Hermosa ARTESIA BLVD AVIATION WY AVIATION Beach Ramona Sandy Loam (Soil Type 14) CITY OF MANHATTAN BEACH ³ WATER MASTER PLAN Montezuma Clay Adobe (Soil Type 9) 0 1,000 2,000 4,000 Feet PROJECT NO: 1640901.20 Soils Map 1" = 2,000' DATE: April 2010 Figure 3-2 SECTION 3 STUDY AREA Due to the moderating effect of the ocean, temperatures are cooler than the inland areas of Los Angeles, where temperatures frequently exceed 90°F. The coolest months are typically December and January with an average minimum temperature of 48 F. The rainfall totals in the City between 1990 and 2008 are illustrated on Figure 3-3 (LACDPW Rain Gauge Site 1070, Los Angeles County Hydrology Department). The average annual rainfall of about 13.19 inches occurs primarily during the winter months, between November and March. Figure 3-3 Seasonal Rainfall 1990-2008 30 LACDPW Rain Gauge Site - 1070 25 20 Average = 13.19 Inches 15 10 Precipiation (in) Precipiation 5 - 1990/1991 1991/1992 1992/1993 1993/1994 1994/1995 1995/1996 1996/1997 1997/1998 1998/1999 1999/2000 2000/2001 2001/2002 2002/2003 2003/2004 2004/2005 2005/2006 2006/2007 2007/2008 Year 3-6 Land Use The land use information utilized in the preparation of the Water Master Plan is primarily based upon the City’s 2003 General Plan land use shapefile (GENPLAN). This information was supplemented by aerial photographs, field reviews, and information provided by City staff. The City is a well planned urban community with a balance of residential, commercial, and industrial land uses. The primary land use in the City is residential (1,422 Net Acres or 56.3 %). The total study area, including streets and right of way, is about 2,524 acres or 3.94 square miles. According to the 2009 California Department of Finance Housing Estimates, the total number of housing units within the City is approximately 15,580 with a 3.72 percent vacancy rate. Table 3-1 provides a summary of the existing City land uses. Figure 3-4 shows the locations of these land uses. 3-4 City of Manhattan Beach R:\Reports\Nabgattan Beach\Water Master Plan Water Master Plan SECTION 3 STUDY AREA Table 3-1 Existing Study Area Land Uses Land Use Net Acres Percentage Low Density Residential 1,123 44.5% Medium Density Residential 149 5.9% High Density Residential 151 6.0% Total Residential 1,422 56.3% General Commercial 88 3.5% Downtown Commercial 14 0.5% Local Commercial 12 0.5% Mixed-Use Commercial 3 0.1% Manhattan Village Commercial 102 4.1% North End Commercial 8 0.3% Total Commercial 227 9.0% Industrial 73 2.9% Parks and Open Sace 152 6.0% Public Facilities 143 5.6% Streets and Right of Way 508 20.1% Total 2,524 100.0% Residential Land Uses Low density residential uses provide for single-family residences within a density range of 1.0 to 16.1 units per acre. Typically, the units are detached homes on individual lots. Medium density residential uses allow for single-family homes, duplexes, and triplexes, including condominiums. Multiple family housing with four or more units may also be permitted. Densities range from 11.6 to 32.3 units per acre. High density residential uses allow for all types of housing, including apartments, condominiums, and senior housing. Densities can reach up to 51.3 units per acre. Other permitted uses in residential area include parks and recreation facilities, public and private schools, public safety facilities, and facilities for religious assembly.