Napa County, California 04/27/2000 Table ENG-3 - Building Site Development The information in this table indicates the dominant soil condition but does not eliminate the need for onsite investigation. The numbers in the value columns range from 0.01 to 1.00. The larger the value, the greater the potential limitation. The rating is based on the limitation with the highest value. Only three highest value limitations are lisited. There may be more limitations. Fine earth fractions and coarse fragments are reported on a weight basis. A brief rating criteria summary and abbreviations are listed on the last page of this report. ________________________________________________________________________________________________________ | | | | Map symbol |Pct.| Dwellings without | Dwellings with | Small Commercial and soil name | | Basements | Basements | Buildings | |_________________________|_________________________|_________________________ | | Limitation |Value| Limitation |Value| Limitation |Value _____________________|____|___________________|_____|___________________|_____|___________________|_____ | | | | | | | 100: | | | | | | | Aiken---------------| 85 |Moderate | |Moderate | |Severe | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Slopes > 8% |1.00 | | 3-6) | | 3-6) | | | | | Slopes 8 to 15% |0.04 | Bedrock (hard) |0.42 | Shrink-swell (LEP|0.50 | | | | from 40 to 60" | | 3-6) | | | | | Slopes 8 to 15% |0.04 | | | | | | | | | 101: | | | | | | | Aiken---------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | Bedrock (hard) |0.42 | | | | | | from 40 to 60" | | | | | | | | | | 102: | | | | | | | Aiken---------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | Bedrock (hard) |0.42 | | | | | | from 40 to 60" | | | | | | | | | | 103: | | | | | | | Bale----------------| 85 |Severe | |Severe | |Severe | | | Flooding >= rare |1.00 | Flooding >= rare |1.00 | Flooding >= rare |1.00 | | | | Wetness from 2.5'|0.15 | | | | | | to 6' depth | | | | | | | | | | 104: | | | | | | | Bale----------------| 85 |Severe | |Severe | |Severe | | | Flooding >= rare |1.00 | Flooding >= rare |1.00 | Flooding >= rare |1.00 | | Shrink-swell (LEP|0.50 | Wetness from 2.5'|0.15 | Shrink-swell (LEP|0.50 | | 3-6) | | to 6' depth | | 3-6) | | | | | | | | 105: | | | | | | | Bale----------------| 85 |Severe | |Severe | |Severe | | | Flooding >= rare |1.00 | Flooding >= rare |1.00 | Flooding >= rare |1.00 | | Shrink-swell (LEP|0.50 | Wetness from 2.5'|0.15 | Shrink-swell (LEP|0.50 | | 3-6) | | to 6' depth | | 3-6) | | | | | | | | 106: | | | | | | | Bale----------------| 40 |Severe | |Severe | |Severe | | | Flooding >= rare |1.00 | Flooding >= rare |1.00 | Flooding >= rare |1.00 | | | | Wetness from 2.5'|0.95 | | | | | | to 6' depth | | | | | | | | | | Bale----------------| 30 |Severe | |Severe | |Severe | | | Flooding >= rare |1.00 | Flooding >= rare |1.00 | Flooding >= rare |1.00 | | Shrink-swell (LEP|0.50 | Wetness from 2.5'|0.95 | Shrink-swell (LEP|0.50 | | 3-6) | | to 6' depth | | 3-6) | | | | | | | | | | | | | | | 107: | | | | | | | Boomer--------------| 85 |Moderate | |Moderate | |Severe | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Slopes > 8% |1.00 | | 3-6) | | 3-6) | | | | | Slopes 8 to 15% |0.04 | Slopes 8 to 15% |0.04 | Shrink-swell (LEP|0.50 | | | | | | 3-6) | | | | | | | | 108: | | | | | | | Boomer--------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 109: | | | | | | | Boomer--------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 110: | | | | | | | Boomer--------------| 40 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | Forward-------------| 35 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | | | Bedrock (soft) |0.42 | | | | | | from 20 to 40" | | | | | | | | | | Felta---------------| 15 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | | | | | | 111: | | | | | | | Boomer--------------| 40 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | Forward-------------| 35 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | | | Bedrock (soft) |0.42 | | | | | | from 20 to 40" | | | | | | | | | | Felta---------------| 20 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | | | | | | 112: | | | | | | | Bressa--------------| 65 |Moderate | |Moderate | |Severe | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Slopes > 8% |1.00 | | 3-6) | | 3-6) | | | | | Slopes 8 to 15% |0.16 | Slopes 8 to 15% |0.16 | Shrink-swell (LEP|0.50 | | | | | | 3-6) | | | | | Bedrock (soft) |0.10 | | | | | | from 20 to 40" | | | | | | | | | | Dibble--------------| 25 |Severe | |Severe | |Severe | | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | | >6) | | >6) | | >6) | | | Slopes 8 to 15% |0.16 | Bedrock (soft) |0.42 | Slopes > 8% |1.00 | | | | from 20 to 40" | | | | | | | Slopes 8 to 15% |0.16 | | | | | | | | | 113: | | | | | | | Bressa--------------| 70 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | Bedrock (soft) |0.10 | | | | | | from 20 to 40" | | | | | | | | | | Dibble--------------| 20 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | | >6) | | >6) | | >6) | | | | | Bedrock (soft) |0.42 | | | | | | from 20 to 40" | | | | | | | | | | 114: | | | | | | | Bressa--------------| 70 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | Bedrock (soft) |0.10 | | | | | | from 20 to 40" | | | | | | | | | | Dibble--------------| 15 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | | >6) | | >6) | | >6) | | | | | Bedrock (soft) |0.10 | | | | | | from 20 to 40" | | | | | | | | | | 115: | | | | | | | Bressa--------------| 75 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | Bedrock (soft) |0.10 | | | | | | from 20 to 40" | | | | | | | | | | Dibble--------------| 15 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | | >6) | | >6) | | >6) | | | | | Bedrock (soft) |0.42 | | | | | | from 20 to 40" | | | | | | | | | | 116: | | | | | | | Clear lake----------| 85 |Severe | |Severe | |Severe | | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | | >6) | | >6) | | >6) | | | | | | | | 117: | | | | | | | Clear lake----------| 85 |Severe | |Severe | |Severe | | | Flooding >= rare |1.00 | Flooding >= rare |1.00 | Flooding >= rare |1.00 | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | | >6) | | >6) | | >6) | | | | | Wetness from 2.5'|0.35 | | | | | | to 6' depth | | | | | | | | | | 118: | | | | | | | Cole----------------| 85 |Severe | |Severe | |Severe | | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | | >6) | | >6) | | >6) | | | | | Wetness from 2.5'|0.61 | | | | | | to 6' depth | | | | | | | | | | 119: | | | | | | | Cole----------------| 85 |Severe | |Severe | |Severe | | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | | >6) | | >6) | | >6) | | | | | Wetness from 2.5'|0.61 | | | | | | to 6' depth | | | | | | | | | | 120: | | | | | | | Contra costa--------| 85 |Severe | |Severe | |Severe | | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | | >6) | | >6) | | >6) | | | Slopes 8 to 15% |0.16 | Bedrock (soft) |0.23 | Slopes > 8% |1.00 | | | | from 20 to 40" | | | | | | | Slopes 8 to 15% |0.16 | | | | | | | | | 121: | | | | | | | Contra costa--------| 85 |Moderate | |Severe | |Severe | | | Shrink-swell (LEP|0.50 | Bedrock (hard) < |1.00 | Slopes > 8% |1.00 | | 3-6) | | 40" depth | | | | | Bedrock (hard) |0.23 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | from 20 to 40" | | 3-6) | | 3-6) | | | Slopes 8 to 15% |0.16 | Slopes 8 to 15% |0.16 | Bedrock (hard) |0.23 | | | | | | from 20 to 40" | | | | | | | | 122: | | | | | | | Coombs--------------| 85 |Moderate | |Moderate | |Moderate | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 123: | | | | | | | Coombs--------------| 85 |Moderate | |Moderate | |Moderate | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 124: | | | | | | | Cortina-------------| 85 |Slight | |Slight | |Slight | | | | | | | | 125: | | | | | | | Cortina-------------| 85 |Severe | |Severe | |Severe | | | Fragments (>3") |1.00 | Fragments (>3") |1.00 | Fragments (>3") |1.00 | | >50% | | >50% | | >50% | | | | | | | | 126: | | | | | | | Diablo--------------| 85 |Severe | |Severe | |Severe | | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | | >6) | | >6) | | >6) | | | | | | | Slopes from 4% to|0.86 | | | | | | 8% | | | | | | | | 127: | | | | | | | Diablo--------------| 85 |Severe | |Severe | |Severe | | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Slopes > 8% |1.00 | | >6) | | >6) | | | | | Slopes 8 to 15% |0.63 | Slopes 8 to 15% |0.63 | Shrink-swell (LEP|1.00 | | | | | | >6) | | | | | | | | | | | | | | | 128: | | | | | | | Diablo--------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | | >6) | | >6) | | >6) | | | | | | | | 129: | | | | | | | Diablo--------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | | >6) | | >6) | | >6) | | | | | | | | 130: | | | | | | | Egbert--------------| 85 |Severe | |Severe | |Severe | | | Flooding >= rare |1.00 | Flooding >= rare |1.00 | Flooding >= rare |1.00 | | Wetness from 18 |0.86 | Wetness < 2.5' |1.00 | Wetness from 18 |0.86 | | to 30" depth | | depth | | to 30" depth | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 131: | | | | | | | Fagan---------------| 85 |Moderate | |Moderate | |Severe | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Slopes > 8% |1.00 | | 3-6) | | 3-6) | | | | | Slopes 8 to 15% |0.16 | Slopes 8 to 15% |0.16 | Shrink-swell (LEP|0.50 | | | | | | 3-6) | | | | | | | | 132: | | | | | | | Fagan---------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 133: | | | | | | | Fagan---------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 134: | | | | | | | Fagan---------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 135: | | | | | | | Felton--------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | Bedrock (soft) |0.10 | | | | | | from 20 to 40" | | | | | | | | | | 136: | | | | | | | Felton--------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | Bedrock (soft) |0.10 | | | | | | from 20 to 40" | | | | | | | | | | | | | | | | | 137: | | | | | | | Felton--------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | Bedrock (soft) |0.10 | | | | | | from 20 to 40" | | | | | | | | | | 138: | | | | | | | Forward-------------| 85 |Slight | |Moderate | |Moderate | | | | | Bedrock (soft) |0.42 | Slopes from 4% to|0.47 | | | | from 20 to 40" | | 8% | | | | | | | | 139: | | | | | | | Forward-------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | | | Bedrock (soft) |0.42 | | | | | | from 20 to 40" | | | | | | | | | | 140: | | | | | | | Forward-------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | | | Bedrock (soft) |0.42 | | | | | | from 20 to 40" | | | | | | | | | | 141: | | | | | | | Forward-------------| 60 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | | | Bedrock (soft) |0.42 | | | | | | from 20 to 40" | | | | | | | | | | Kidd----------------| 30 |Severe | |Severe | |Severe | | | Bedrock (soft) < |1.00 | Slopes > 15% |1.00 | Bedrock (soft) < |1.00 | | 20" depth | | | | 20" depth | | | Slopes > 15% |1.00 | Bedrock (soft) < |1.00 | Slopes > 8% |1.00 | | | | 20" depth | | | | | | | | | | 142: | | | | | | | Guenoc--------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Bedrock (hard) < |1.00 | Shrink-swell (LEP|0.50 | | 3-6) | | 40" depth | | 3-6) | | | Bedrock (hard) |0.23 | Shrink-swell (LEP|0.50 | Bedrock (hard) |0.23 | | from 20 to 40" | | 3-6) | | from 20 to 40" | | | | | | | | 143: | | | | | | | Guenoc--------------| 60 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Bedrock (hard) < |1.00 | Slopes > 8% |1.00 | | | | 40" depth | | | | | Shrink-swell (LEP|0.50 | Slopes > 15% |1.00 | Shrink-swell (LEP|0.50 | | 3-6) | | | | 3-6) | | | Bedrock (hard) |0.23 | Shrink-swell (LEP|0.50 | Bedrock (hard) |0.23 | | from 20 to 40" | | 3-6) | | from 20 to 40" | | | | | | | | Rock outcrop--------| 30 |Not rated | |Not rated | |Not rated | | | Not rated | | Not rated | | Not rated | | | | | | | | 144: | | | | | | | Guenoc--------------| 50 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Bedrock (hard) < |1.00 | Shrink-swell (LEP|0.50 | | 3-6) | | 40" depth | | 3-6) | | | Bedrock (hard) |0.23 | Shrink-swell (LEP|0.50 | Bedrock (hard) |0.23 | | from 20 to 40" | | 3-6) | | from 20 to 40" | | | | | | | | Rock outcrop--------| 40 |Not rated | |Not rated | |Not rated | | | Not rated | | Not rated | | Not rated | | | | | | | | 145: | | | | | | | Haire---------------| 85 |Moderate | |Moderate | |Moderate | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 146: | | | | | | | Haire---------------| 85 |Moderate | |Moderate | |Moderate | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | Slopes from 4% to|0.47 | | | | | | 8% | | | | | | | | 147: | | | | | | | Haire---------------| 85 |Moderate | |Moderate | |Moderate | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 148: | | | | | | | Haire---------------| 85 |Moderate | |Moderate | |Moderate | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | Slopes from 4% to|0.47 | | | | | | 8% | | | | | | | | 149: | | | | | | | Haire---------------| 85 |Moderate | |Moderate | |Severe | | | Slopes 8 to 15% |0.63 | Slopes 8 to 15% |0.63 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 150: | | | | | | | Haire---------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 151: | | | | | | | Hambright-----------| 50 |Severe | |Severe | |Severe | | | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | | 20" depth | | 40" depth | | 20" depth | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Fragments (>3") |1.00 | Fragments (>3") |1.00 | Fragments (>3") |1.00 | | >50% | | >50% | | >50% | | | | | | | | Rock outcrop--------| 35 |Not rated | |Not rated | |Not rated | | | Not rated | | Not rated | | Not rated | | | | | | | | 152: | | | | | | | Hambright-----------| 50 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | | 20" depth | | 40" depth | | 20" depth | | | Fragments (>3") |1.00 | Fragments (>3") |1.00 | Fragments (>3") |1.00 | | >50% | | >50% | | >50% | | | | | | | | Rock outcrop--------| 40 |Not rated | |Not rated | |Not rated | | | Not rated | | Not rated | | Not rated | | | | | | | | 153: | | | | | | | Henneke-------------| 85 |Severe | |Severe | |Severe | | | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | | 20" depth | | 40" depth | | 20" depth | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 154: | | | | | | | Henneke-------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | | 20" depth | | 40" depth | | 20" depth | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 155: | | | | | | | Kidd----------------| 85 |Severe | |Severe | |Severe | | | Bedrock (soft) < |1.00 | Slopes > 15% |1.00 | Bedrock (soft) < |1.00 | | 20" depth | | | | 20" depth | | | Slopes > 15% |1.00 | Bedrock (soft) < |1.00 | Slopes > 8% |1.00 | | | | 20" depth | | | | | | | | | | 156: | | | | | | | Kidd----------------| 85 |Severe | |Severe | |Severe | | | Bedrock (soft) < |1.00 | Slopes > 15% |1.00 | Bedrock (soft) < |1.00 | | 20" depth | | | | 20" depth | | | Slopes > 15% |1.00 | Bedrock (soft) < |1.00 | Slopes > 8% |1.00 | | | | 20" depth | | | | | | | | | | 157: | | | | | | | Lodo----------------| 45 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Bedrock (soft) < |1.00 | Bedrock (soft) < |1.00 | Bedrock (soft) < |1.00 | | 20" depth | | 20" depth | | 20" depth | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | Maymen--------------| 25 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | | 20" depth | | 40" depth | | 20" depth | | | | | | | | Felton--------------| 20 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | Bedrock (soft) |0.10 | | | | | | from 20 to 40" | | | | | | | | | | 158: | | | | | | | Los gatos-----------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Bedrock (hard) < |1.00 | Slopes > 8% |1.00 | | | | 40" depth | | | | | Shrink-swell (LEP|0.50 | Slopes > 15% |1.00 | Shrink-swell (LEP|0.50 | | 3-6) | | | | 3-6) | | | Bedrock (hard) |0.42 | Shrink-swell (LEP|0.50 | Bedrock (hard) |0.42 | | from 20 to 40" | | 3-6) | | from 20 to 40" | | | | | | | | | | | | | | | 159: | | | | | | | Los gatos-----------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Bedrock (hard) < |1.00 | Shrink-swell (LEP|0.50 | | 3-6) | | 40" depth | | 3-6) | | | Bedrock (hard) |0.42 | Shrink-swell (LEP|0.50 | Bedrock (hard) |0.42 | | from 20 to 40" | | 3-6) | | from 20 to 40" | | | | | | | | 160: | | | | | | | Los gatos-----------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Bedrock (hard) < |1.00 | Shrink-swell (LEP|0.50 | | 3-6) | | 40" depth | | 3-6) | | | Bedrock (hard) |0.42 | Shrink-swell (LEP|0.50 | Bedrock (hard) |0.42 | | from 20 to 40" | | 3-6) | | from 20 to 40" | | | | | | | | 161: | | | | | | | Maxwell-------------| 85 |Severe | |Severe | |Severe | | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | | >6) | | >6) | | >6) | | | | | | | Slopes from 4% to|0.47 | | | | | | 8% | | | | | | | | 162: | | | | | | | Maymen--------------| 60 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | | 20" depth | | 40" depth | | 20" depth | | | | | | | | Los gatos-----------| 25 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Bedrock (hard) < |1.00 | Shrink-swell (LEP|0.50 | | 3-6) | | 40" depth | | 3-6) | | | Bedrock (hard) |0.42 | Shrink-swell (LEP|0.50 | Bedrock (hard) |0.42 | | from 20 to 40" | | 3-6) | | from 20 to 40" | | | | | | | | 163: | | | | | | | Maymen--------------| 30 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | | 20" depth | | 40" depth | | 20" depth | | | | | | | | Millsholm-----------| 30 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | | 20" depth | | 40" depth | | 20" depth | | | | | | | | Lodo----------------| 20 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Bedrock (soft) < |1.00 | Bedrock (soft) < |1.00 | Bedrock (soft) < |1.00 | | 20" depth | | 20" depth | | 20" depth | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 164: | | | | | | | Millsholm-----------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | | 20" depth | | 40" depth | | 20" depth | | | | | | | | 165: | | | | | | | Millsholm-----------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | | 20" depth | | 40" depth | | 20" depth | | | | | | | | 166: | | | | | | | Montara-------------| 85 |Severe | |Severe | |Severe | | | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | | 20" depth | | 40" depth | | 20" depth | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 167: | | | | | | | Montara-------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | | 20" depth | | 40" depth | | 20" depth | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 168: | | | | | | | Perkins-------------| 85 |Slight | |Moderate | |Slight | | | | | Shrink-swell (LEP|0.50 | | | | | | 3-6) | | | | | | | | | | 169: | | | | | | | Perkins-------------| 85 |Slight | |Moderate | |Moderate | | | | | Shrink-swell (LEP|0.50 | Slopes from 4% to|0.86 | | | | 3-6) | | 8% | | | | | | | | 170: | | | | | | | Pleasanton----------| 85 |Moderate | |Moderate | |Moderate | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 171: | | | | | | | Pleasanton----------| 85 |Moderate | |Moderate | |Moderate | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 172: | | | | | | | Reyes---------------| 85 |Severe | |Severe | |Severe | | | Flooding >= rare |1.00 | Flooding >= rare |1.00 | Flooding >= rare |1.00 | | Shrink-swell (LEP|1.00 | Wetness < 2.5' |1.00 | Shrink-swell (LEP|1.00 | | >6) | | depth | | >6) | | | Wetness < 18" |1.00 | Shrink-swell (LEP|1.00 | Wetness < 18" |1.00 | | depth | | >6) | | depth | | | | | | | | 173: | | | | | | | Reyes---------------| 85 |Severe | |Severe | |Severe | | | Flooding >= rare |1.00 | Flooding >= rare |1.00 | Flooding >= rare |1.00 | | Wetness < 18" |1.00 | Wetness < 2.5' |1.00 | Wetness < 18" |1.00 | | depth | | depth | | depth | | | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | Shrink-swell (LEP|1.00 | | >6) | | >6) | | >6) | | | | | | | | 174: | | | | | | | Riverwash-----------|100 |Not rated | |Not rated | |Not rated | | | Not rated | | Not rated | | Not rated | | | Not rated | | Not rated | | Not rated | | | | | | | | | | | | | | | 175: | | | | | | | Rock outcrop--------|100 |Not rated | |Not rated | |Not rated | | | Not rated | | Not rated | | Not rated | | | | | | | | 176: | | | | | | | Rock outcrop--------| 60 |Not rated | |Not rated | |Not rated | | | Not rated | | Not rated | | Not rated | | | | | | | | Hambright-----------| 30 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | Bedrock (hard) < |1.00 | | 20" depth | | 40" depth | | 20" depth | | | Fragments (>3") |1.00 | Fragments (>3") |1.00 | Fragments (>3") |1.00 | | >50% | | >50% | | >50% | | | | | | | | 177: | | | | | | | Rock outcrop--------| 70 |Not rated | |Not rated | |Not rated | | | Not rated | | Not rated | | Not rated | | | | | | | | Kidd----------------| 25 |Severe | |Severe | |Severe | | | Bedrock (soft) < |1.00 | Slopes > 15% |1.00 | Bedrock (soft) < |1.00 | | 20" depth | | | | 20" depth | | | Slopes > 15% |1.00 | Bedrock (soft) < |1.00 | Slopes > 8% |1.00 | | | | 20" depth | | | | | | | | | | 178: | | | | | | | Sobrante------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Bedrock (hard) < |1.00 | Slopes > 8% |1.00 | | | | 40" depth | | | | | Shrink-swell (LEP|0.50 | Slopes > 15% |1.00 | Shrink-swell (LEP|0.50 | | 3-6) | | | | 3-6) | | | Bedrock (hard) |0.23 | Shrink-swell (LEP|0.50 | Bedrock (hard) |0.23 | | from 20 to 40" | | 3-6) | | from 20 to 40" | | | | | | | | 179: | | | | | | | Sobrante------------| 85 |Severe | |Severe | |Severe | | | Slopes > 15% |1.00 | Slopes > 15% |1.00 | Slopes > 8% |1.00 | | Shrink-swell (LEP|0.50 | Bedrock (hard) < |1.00 | Shrink-swell (LEP|0.50 | | 3-6) | | 40" depth | | 3-6) | | | Bedrock (hard) |0.23 | Shrink-swell (LEP|0.50 | Bedrock (hard) |0.23 | | from 20 to 40" | | 3-6) | | from 20 to 40" | | | | | | | | 180: | | | | | | | Tehama--------------| 85 |Moderate | |Moderate | |Moderate | | | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | Shrink-swell (LEP|0.50 | | 3-6) | | 3-6) | | 3-6) | | | | | | | | 181: | | | | | | | Yolo----------------| 85 |Slight | |Moderate | |Slight | | | | | Shrink-swell (LEP|0.50 | | | | | | 3-6) | | | | | | | | | | 182: | | | | | | | Yolo----------------| 85 |Slight | |Moderate | |Slight | | | | | Shrink-swell (LEP|0.50 | | | | | | 3-6) | | | | | | | | | | 185: | | | | | | | Pits, quarry--------|100 |Not rated | |Not rated | |Not rated | | | Not rated | | Not rated | | Not rated | _____________________|____|___________________|_____|___________________|_____|___________________|_____ The interpretation for dwellings without basements evaluates the following soil properties, some at variable depths in the soil: flooding, ponding, wetness, slope, subsidence of organic soils, shrink-swell expressed as linear extensibility percent (LEP), organic Unified classes for low soil strength (PT, OL or OH), depth to hard or soft bedrock, depth to thick or thin cemented pans, and fragments greater than 3 inches in size. The interpretation for dwellings with basements evaluates the following soil properties, some at variable depths in the soil: flooding, ponding, wetness, slope, subsidence of organic soils, shrink-swell potential expressed as linear extensibility percent (LEP), organic Unifed classes for low strength (PT, OL, OH), depth to hard or soft bedrock, depth to thick or thin cemented pan, and fragments greater than 3 inches in size. The interpretation for small commercial buildings evaluates the following soil properties, some at variable depths in the soil: flooding, ponding, wetness, slope, subsidence of organic soils, shrink-swell potential expressed as linear extensibility percent (LEP), depth to hard or soft bedrock, depth to thick or thin cemented pan, and fragments greater than 3 inches in size. Building Site Development Soil properties influence the development of building sites, including the selection of the site, the design of the structure, construction, performance after construction, and maintenance. Tables ENG-3 and ENG-4 show the degree and kind of soil limitations that affect dwellings with and without basements, small commercial buildings, local roads and streets, shallow excavations, and lawns and landscaping. The ratings in the tables are both verbal and numerical. Rating class terms indicate the extent to which the soils are limited by all of the soil features that affect building site development. Slight indicates that the soil has features that are very favorable for the specified use. Good performance and very low maintenance can be expected. Moderate indicates that the soil has features that are moderately favorable for the specified use. The limitations can be overcome or minimized by special planning, design, or installation. Fair performance and moderate maintenance can be expected. Severe indicates that the soil has one or more features that are unfavorable for the specified use. The limitations generally cannot be overcome without major soil reclamation, special design, or expensive installation procedures. Poor performance and high maintenance can be expected. Numerical ratings in the tables indicate the severity of individual limitations. The ratings are shown as decimal fractions ranging from 0.00 to 1.00. They indicate gradations between the point at which a soil feature has the greatest negative impact on the use (1.00) and the point at which the soil feature is not a limitation (0.00). Dwellings and small commercial buildings Major Management Factors Dwellings are single-family houses of three stories or less. For dwellings without basements, the foundation is assumed to consist of spread footings of reinforced concrete built on undisturbed soil at a depth of 2 feet or at the depth of maximum frost penetration, whichever is deeper. For dwellings with basements, the foundation is assumed to consist of spread footings of reinforced concrete built on undisturbed soil at a depth of about 7 feet. The ratings for dwellings are based on the soil properties that affect the capacity of the soil to support a load without movement and on the properties that affect excavation and construction costs. The properties that affect the load- supporting capacity include depth to soil wetness, ponding, flooding, subsidence, linear extensibility (LEP or shrink-swell potential), and compressibility. Compressibility is inferred from the Unified classification. The properties that affect the ease and amount of excavation include depth to soil wetness, ponding, flooding, slope, depth to bedrock or a cemented pan, hardness of bedrock or a cemented pan, and the amount, size, and depth of fragments.Small commercial buildings are structures that are less than three stories high and do not have basements. The foundation is assumed to consist of spread footings of reinforced concrete built on undisturbed soil at a depth of 2 feet or at the depth of maximum frost penetration, whichever is deeper. The ratings are based on the soil properties that affect the capacity of the soil to support a load without movement and on the properties that affect excavation and construction costs. The properties that affect the load-supporting capacity include depth to soil wetness, ponding, flooding, subsidence, linear extensibility (LEP or shrink-swell potential), and compressibility (which is inferred from the Unified classification). The properties that affect the ease and amount of excavation include flooding, depth to a water table, ponding, slope, depth to bedrock or a cemented pan, hardness of bedrock or a cemented pan, and the amount, size, and depth of fragments. Major Management Considerations- Dwellings Without Basements Depth to bedrock: Depth to bedrock is shallow enough to cause a restriction in use. Onsite investigation is needed to identify areas where the soil is deep enough for dwellings. If slopes are over 8 percent, cuts needed to provide essentially level building sites can expose bedrock. The bedrock can make a good base for the foundation. To maintain vegetation, frequent irrigation cycles and controlled application rates should be used. Depth to pan: Dense, hard, somewhat impervious cemented soil material at a specific depth restricts use. Onsite investigation is needed to identify areas where the soil is deep enough for dwellings. If slopes are over 8 percent, cuts needed to provide essentially level building sites can expose the cemented pan. The pan can make a good base for the foundation. To maintain vegetation, frequent irrigation cycles and controlled application rates should be used to prevent a perched water table. If deep rooted plants, such as trees, are planted, the pan should be ripped or broken to provide greater rooting depth. Flooding: Soil flooded by moving water from stream overflow, runoff, or high tides. Flooding potential should be considered before buildings or capital improvements are planned and installed. Buildings, roads and streets should be located above the expected flood level. Dikes and channels that have outlets for floodwater can be used to protect buildings from flooding. Fragments: The profile contains enough fragments of specific size to adversely affect site preparation or trafficability. Organic matter (OM): High organic matter percent at some depth, sometimes expressed as a Unified soil class (PT, OL, or OH), can result in poor engineering properties and subsidence. Low organic matter can influence plant growth. Ponding: Standing water on soils in closed depressions that is removed only by percolation or evapotranspiration. Drainage is needed if roads and building foundations are constructed. Shrink-swell (LEP): The shrinking of soil when dry and the swelling when wet is expressed as the linear extensibility percent (LEP). Shrinking and swelling can damage roads, dams, building foundations, and other structures. It can also damage plant roots. Properly designing foundations and footings and diverting runoff away from buildings help to prevent structural damage because of shrinking and swelling. Slope: The slope is steep enough that special practices are required to ensure satisfactory performance of the soil. Excavation for roads and buildings increases the hazard of erosion. During construction all bare ground should be mulched. A ground cover should be established to prevent excessive erosion during periods of high rainfall. Wetness: Wetness near the surface or high water tables affect growth of plants and construction of facilities. Drainage is needed if roads and building foundations are constructed. Major Management Considerations- Dwellings with Basements Depth to bedrock: Depth to bedrock is shallow enough to cause a restriction in use. Onsite investigation is needed to identify areas where the soil is deep enough for dwellings. If slopes are over 8 percent, cuts needed to provide essentially level building sites can expose bedrock. The bedrock can make a good base for the foundation. To maintain vegetation, frequent irrigation cycles and controlled application rates should be used. Depth to pan: Dense, hard, somewhat impervious cemented soil material at a specific depth restricts use. Onsite investigation is needed to identify areas where the soil is deep enough for dwellings. If slopes are over 8 percent, cuts needed to provide essentially level building sites can expose the cemented pan. The pan can make a good base for the foundation. To maintain vegetation, frequent irrigation cycles and controlled application rates should be used to prevent a perched water table. If deep-rooted plants, such as trees, are planted, the pan should be ripped or broken to provide greater rooting depth. Flooding: Soil flooded by moving water from stream overflow, runoff, or high tides Flooding potential should be considered before buildings or capital improvements are planned and installed. Buildings, roads and streets should be located above the expected flood level. Dikes and channels that have outlets for floodwater can be used to protect buildings from flooding. Fragments: The profile contains enough fragments of specific size to adversely affect site preparation or trafficability. Organic matter (OM): High organic matter percent at some depth, sometimes expressed as a Unified soil class (PT, OL, or OH), can result in poor engineering properties and subsidence. Low organic matter can influence plant growth. Ponding: Standing water on soils in closed depressions that is removed only by percolation or evapotranspiration. Drainage is needed if roads and building foundations are constructed. Shrink-swell (LEP): The shrinking of soil when dry and the swelling when wet is expressed as the linear extensibility percent. Shrinking and swelling can damage roads, dams, building foundations, and other structures. It can also damage plant roots. Properly designing foundations and footings and diverting runoff away from buildings help to prevent structural damage because of shrinking and swelling. Slope: The slope is steep enough that special practices are required to ensure satisfactory performance of the soil.Excavation for roads and buildings increases the hazard of erosion. During construction all bare ground should be mulched. A ground cover should be established to prevent excessive erosion during periods of high rainfall. Wetness: Wetness near the surface or high water tables affect growth of plants and construction of facilities. Drainage is needed if roads and building foundations are constructed. Major Management Considerations- Small Commercial Buildings Depth to bedrock: Depth to bedrock is shallow enough to cause a restriction in use. Onsite investigation is needed to identify areas where the soil is deep enough for dwellings. If slopes are over 4 percent, cuts needed to provide essentially level building sites can expose bedrock. The bedrock can make a good base for the foundation. To maintain vegetation, frequent irrigation cycles and controlled application rates should be used. Depth to pan: Dense, hard, somewhat impervious cemented soil material at a specific depth restricts use. Onsite investigation is needed to identify areas where the soil is deep enough for dwellings. If slopes are over 4 percent, cuts needed to provide essentially level building sites can expose the cemented pan. The pan can make a good base for the foundation. To maintain vegetation, frequent irrigation cycles and controlled application rates should be used to prevent a perched water table. If deep-rooted plants, such as trees, are planted, the pan should be ripped or broken to provide greater rooting depth. Flooding: Soil flooded by moving water from stream overflow, runoff, or high tides Flooding potential should be considered before buildings or capital improvements are planned and installed. Buildings, roads and streets should be located above the expected flood level. Dikes and channels that have outlets for floodwater can be used to protect buildings from flooding Fragments: The profile contains enough fragments of specific size to adversely affect site preparation or trafficability. Organic matter (OM): High organic matter percent at some depth, sometimes expressed as a Unified soil class PT, OL, or OH), can result in poor engineering properties and subsidence. Low organic matter can influence plant growth. Ponding: Standing water on soils in closed depressions that is removed only by percolation or evapotranspiration. Drainage is needed if roads and building foundations are constructed. Shrink-swell (LEP): The shrinking of soil when dry and the swelling when wet is expressed as the linear extensibility percent. Shrinking and swelling can damage roads, dams, building foundations, and other structures. It can also damage plant roots. Properly designing foundations and footings and diverting runoff away from buildings help to prevent structural damage because of shrinking and swelling. Slope: The slope is steep enough that special practices are required to ensure satisfactory performance of the soil. Excavation for roads and buildings increases the hazard of erosion. During construction all bare ground should be mulched. A ground cover should be established to prevent excessive erosion during periods of high rainfall. Wetness: Wetness near the surface or high water tables affect growth of plants and construction of facilities. Drainage is needed if roads and building foundations are constructed.