General Plan Update Review Committee Draft Elements Part 2 For ...

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8-2 VISALIA GENERAL PLAN UPDATE Expansive Soils Expansive soils have the potential to shrink or swell significantly with changes in moisture content, which can limit the development capacity of an area. The type and amount of the silt and clay content in the soil will determine the amount of shrink or swell associated with the various levels of water content. Soils comprised of sand and gravel are not expansive soils. Expansive soils are most likely to be found in basins and basin rims. Any structure located on expansive soils can be significantly damaged should the soil suddenly shrink or swell. Structural damage may result over a long period of time, usually from inadequate soils and foundation engineering or the placement of structures directly on expansive soils. Construction in areas of expansive soils may require major subexcavation and replacement of existing materials with more stable soils. Soil types considered to have a moderate “shrinkswell” potential underlie about 2,480 acres in the Planning Area, and are located near the Highway 99/198 interchange, north of the St. Johns River, and in the northwest near the intersection of Road 80 and Avenue 328. See Figure 6-3: Erosion Susceptibility and Shrink-Swell Potential, in Chapter 6. Subsidence Subsidence occurs when a large portion of land is displaced vertically, usually due to the withdrawal of groundwater, oil, or natural gas. Soils that are particularly subject to subsidence include those with high silt or clay content. Some areas in the Central Valley have subsided more than 20 feet during the past 50 years. 1 Subsidence may occur in the Planning Area, particularly in areas with high clay content soils or due to groundwater withdrawal. Seismic Hazards There are no known active earthquake faults in the Planning Area. The closest active faults are Owens Valley fault group and Sierra Nevada Fault Zone, 75 miles to the east of the Planning Area, the San Andreas Fault Zone (60 miles to the west), and an unnamed fault group north of Bakersfield (60 miles to the south). 2 Major earthquakes such as the 1906 San Francisco, 1952 Kern County, and 1983 Coalinga quakes were felt and caused some minor to moderate property damage in Visalia. It is possible, but unlikely, that previously unknown faults could become active in the area. The State Geologist has not delineated any Alquist-Priolo Earthquake Fault Zones within or near the Planning Area. Groundshaking The most significant hazard associated with earthquakes for the Visalia area is ground shaking caused by earthquakes along the San Andreas fault to the west or Owens Valley fault to the east. However, the hazards due to groundshaking are considered to be low, according to the California Geological Survey and US Geological Survey’s Probabalistic Seismic Hazard Analysis. The analysis is based on historic 1 Tulare County, General Plan Background Report, October 2004. pg. 8-11. 2 USGS Fault Maps, http://quake.wr.usgs.gov/info/faultmaps
Huron Avenal 46 Kerman 269 145 33 SAN LUIS OBISPO COUNTY 180 Lemoore Naval Air Station 41 198 Kettleman City San Andreas Fault Zone San Juan Fault Zone 58 5 Easton KERN COUNTY 41 Lemoore 33 Fresno 99 Lost Hills Fowler 43 Hanford Selma Kings River Corcoran Sanger Kingsburg TULARE COUNTY KINGS COUNTY 46 5 Buttonwillow Reedley 201 Orange Cove Dinuba Tulare Wasco Squaw Valley FRESNO COUNTY TULARE COUNTY Orosi Cutler Visalia 43 63 99 63 137 Tipton Woodlake Ivanhoe Pixley Farmers ville Earlimart Shafter 180 190 198 65 Strathmore Delano Pond Poso 58 245 McFarland Exeter Lindsay Porterville Ducor Rosedale Greenacres Kern River St Johns River 99 65 Lake Kaweah Oildale Springville Lake Success TULARE COUNTY KERN COUNTY 155 Bakersfield 58 178 190 Unnamed Ground Breaks of 1952 Camp Nelson Figure 8-1 Figure 8-1: Regional Faults DRAFT ELEMENTS Regional Faults For General Plan Update Review Committee Active Fault with Historic (last 200 years) Displacement Active Fault with Holocene (last 11,000 years) Displacement Potentially Active Fault with Quaternary (last 1,600,000 years) Displacement Visalia City Limits Planning Area County Source: Department of Conservation, California Geological Survey, 2005. 0 5 10 20 MILES AUGUST 2012 8-3
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For General Plan UPdate Committee r
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General Plan Update Review Committe
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TABLE OF CONTENTS 1 Introduction ..
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5 Parks, Schools, Community Facilit
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Figure 4-2e: Gateway Boulevard (6-L
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Table 4-7: Future Intersection LOS
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4 CIRCULATION The Circulation Eleme
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• Traffic controls are incorporat
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10 160 acres 40 Freeway Existing Ar
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Existing conditions for roadway seg
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Table 4-3: Existing Intersection LO
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Table 4-4: Existing Roadway Segment
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travel lane, and bike lane widths;
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Table 4-5: Planned Roadway Improvem
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Figure 4-2b shows a “green corrid
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Future Traffic Conditions The TCAG
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Source: Omni-Means, 2012 DRAFT ELEM
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Table 4-8: Future Roadway LOS (2030
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Local Systems Visalia Transit Visal
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Visalia City Coach Routes Visalia T
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All KART bus routes begin and end a
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esources, improved air quality and
Page 51 and 52: Pedestrian Circulation Walking is t
Page 53 and 54: T-P-45 Require that collector stree
Page 55 and 56: • Establish specific standards fo
Page 57 and 58: T-P-61 *Encourage high-security off
Page 59 and 60: 4.9 AVIATION Visalia owns and opera
Page 61 and 62: 6 OPEN SPACE AND CONSERVATION The O
Page 63 and 64: OSC-O-4 Create and maintain open sp
Page 65 and 66: expected to prevent further degrada
Page 67 and 68: Objectives OSC-O-6 Protect water re
Page 69 and 70: Figure 6-2: Typical Residential Sec
Page 71 and 72: 6.3 LAND RESOURCES This section con
Page 73 and 74: Farmland Type 160 acres 10 40 Prime
Page 75 and 76: activities, and agricultural practi
Page 77 and 78: Mineral Resources The most economic
Page 79 and 80: Special Status Plant Species Specia
Page 81 and 82: Objectives OSC-O-10 Protect and enh
Page 83 and 84: Archaeological Resources A records
Page 85 and 86: 7 AIR QUALITY & GREENHOUSE GASES 7.
Page 87 and 88: State and national health-based amb
Page 89 and 90: Table 7-1: State and National Crite
Page 91 and 92: Toxic Air Contaminants The ambient
Page 93 and 94: State and regional agencies identif
Page 95 and 96: Global Climate Change Global climat
Page 97 and 98: 2010. If California were considered
Page 99 and 100: Objectives AQ-O-3 *Reduce emissions
Page 101: 8 SAFETY AND NOISE The purpose of t
Page 105 and 106: Objectives S-O-1 Minimize risks of
Page 107 and 108: Flooding Risks 10 160 acres 40 } 99
Page 109 and 110: Laws and Regulations Federal and St
Page 111 and 112: ing underground storage tanks which
Page 113 and 114: Fire Threat 10 160 acres 40 Moderat
Page 115 and 116: S-P-30 Assist in solving the incend
Page 117 and 118: EMERGENCY RESPONSE In 2008, the Dep
Page 119 and 120: S-P-39 *Continue to work with weath
Page 121 and 122: Noise Generation in Visalia A commu
Page 123 and 124: craft and rail transportation. Nois
Page 125 and 126: other businesses, including a used
Page 127 and 128: The Noise Ordinance may remain prim
Page 129 and 130: N-P-5 Continue to enforce applicabl
Page 131 and 132: GLOSSARY 100-Year Flood. That flood
Page 133 and 134: Connectivity. The quality of street
Page 135 and 136: dation, competition, or disease. Th
Page 137 and 138: Groundwater Recharge. The natural p
Page 139 and 140: Maximum Contaminant Level. Are stan
Page 141 and 142: of Federal Regulations, Section 17.
Page 143 and 144: Transportation Demand Management. M
Page 145 and 146: cfs: Cubic feet per second CGS: Cal
Page 147: TAZ: Traffic Analysis Zone TCAG: Tu
Page 150 and 151: Table A-1: Contaminated Sites ID Si
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Table B-1: Existing Traffic Noise C
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B-4 Table B-1: Existing Traffic Noi
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B-10 VISALIA GENERAL PLAN UPDATE Th
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D Y E T T & B H ATIA Urban and Regi
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