2010 Metro Mitigation Plan

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Figure 4-11b. Slopes greater than 25% Metropolitan Nashville - Davidson County Hazard Identification Multi-Hazard Mitigation Plan Page 4-52 April 2010
SINKHOLES Karst is a distinctive topography in which the landscape is shaped by the dissolving action of water on carbonate bedrock (usually limestone, dolomite, or marble). Davidson County is characterized by gently folded and flat-lying carbonate rocks, indurated limestone, and dolomite that has not been strongly deformed. Dissolution in this region may produce solution, collapse, and cover-collapse sinkholes. Solution sinkholes form as the limestone dissolves, creating sunken areas in the land surface. Collapse sinkholes form when caves collapse and suddenly drop a portion of the land surface above. Damage to buildings commonly results from collapse of soil and/or rock material into an open void space near or beneath man-made structures (see Figure 4-12). Ground subsidence into even a small opening may be very costly if a structure sits on the overlying surface. Sinkhole collapses are often unpredicted and sudden, although they occur more frequently after heavy rainfall. Heavy rainfalls increase the soil‟s weight and decrease its strength and stability. Construction can also trigger collapses by directing runoff into a vulnerable area, or weakening the cover of an incipient collapse. Finally, lowering of the water table by a nearby well or from quarry pumping can also trigger collapse when the buoyant effect of groundwater is removed. Figure 4-12. Sinkhole Collapse Within Metropolitan Nashville-Davidson County, areas susceptible to sinkhole formations have been noted adjacent to J. Percy Priest Lake (see Figure 4-13). . Metropolitan Nashville - Davidson County Hazard Identification Multi-Hazard Mitigation Plan Page 4-53 April 2010
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Metropolitan Nashville-Davidson Cou
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4.2 Vulnerability Assessment ......
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LIST OF FIGURES Figure 2-1 Metropol
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USDA USGA WCT WNV United States Dep
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Metropolitan Nashville-Davidson Cou
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equired revision every 5 years. The
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Figure 2-1. Metropolitan Nashville-
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Subarea 1 - Joelton Joelton is loca
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Nashville, coupled with the concent
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Interstate 24 and Briley Parkway; t
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Figure 3-1. Similarity Between DMA
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Step 2: Involve the Public In addit
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Step 5: Assess the Problem Once the
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Page 34 and 35: Table 4-1. Federal Disaster Declara
Page 38 and 39: Figure 4-2. Dams and Levees within
Page 40 and 41: management. Total storage capacity
Page 42 and 43: infrequent occurrence. There has ne
Page 44 and 45: Likelihood of Future Occurrences Th
Page 46 and 47: WATERSHED Table 4-3. Major Sources
Page 48 and 49: All streams within Metro Nashville,
Page 50 and 51: Nashville entered the flood insuran
Page 52 and 53: Damage Reach 1 Damage Reach 2 Damag
Page 54 and 55: Dry Creek Watershed The Dry Creek W
Page 56 and 57: performed. Primarily a rural portio
Page 62 and 63: Table 4-13. Pages Branch Damage Rea
Page 64 and 65: Table 4-14. Richland Creek Damage R
Page 70 and 71: 2.96. Damage Reach 12 is located on
Page 72 and 73: Cumberland River The Cumberland Riv
Page 74 and 75: The Southern Appalachian Seismic Zo
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Page 80 and 81: Figure 4-10. Evidence of Landslides
Page 84 and 85: Figure 4.13 Karst Hazard Map of Ten
Page 86 and 87: Human cases have been reported in a
Page 90 and 91: The PDSI indicates that for the per
Page 94 and 95: Figure 4-18. Tennessee Forestry Dis
Page 96 and 97: how hot it feels to an individual w
Page 100 and 101: Figure 4-21. Average Number of Thun
Page 104 and 105: Past Occurrences Several severe tor
Page 106 and 107: Past Occurrences There have been 16
Page 108 and 109: Critical Facilities Of significant
Page 110 and 111: Scientific Name Common Name Federal
Page 112 and 113: Historic and Natural Resources are
Page 114 and 115: West Nile Virus is spread through m
Page 116 and 117: DAM & LEVEE FAILURES Risk - Moderat
Page 118 and 119: WNQM AM 1300; WUPX UPN 30; WVOL AM
Page 120 and 121: Table 4-31. Earthquake Hazard Damag
Page 124 and 125: Figure 4-25 Tornado Siren Locations
Page 128 and 129: Table 4-33. Metropolitan Nashville-
Page 130 and 131: Evaluation of Existing Capabilities
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Harpeth River - Newsom Station Road
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4. MWS has prioritized Capital Impr
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GOAL #3: Objective 3.1: Objective 3
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measures. Team members were allowed
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2009 Update: Since the creation of
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Community Benefit: Potential fundin
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staff gages were installed in 2009
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Existing permit procedures should b
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Community Benefit: Life safety, Pot
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• Develop public-private partners
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2009 Update: MWS continues to send
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Metro officials should talk to thei
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COMPLETED ACTION 4: Double the numb
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• Construct tornado saferooms and
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With the adoption of this plan, the
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of the CPT. In addition, technical
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PROMULGATION STATMENT Date: TBD To:
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2. Multi-Hazard Mitigation Plan Sta
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METROPOLITAN GOVERNMENT OF NASHVILL
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Figure A-5 Mass email sent out from
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FLOODING-1 No. Location Historical
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FLOODING-3 No. Location Historical
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EARTHQUAKES-2 No. Date Richter Magn
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INFESTATIONS-1 West Nile Virus Loca
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WILDFIRES-1 No. Location Year Histo
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EXTREME COLD TEMPERATURES-2 No. Loc
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EXTREME HOT TEMPERATURES-1 No. Loca
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THUNDERSTORMS-1 No. Location Histor
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TORNADOES-2 No. Location Historical
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TORNADOES-4 No. Location Historical
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WINTER STORMS-1 No. Location Histor
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Metropolitan Nashville - Davidson C
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MCALPINE AV Cooper Creek DR 3 HART
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Trib. No. 3 GALLATIN PK OLD HICKORY
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HEATH RD BUFFALO RD HUNTWICK TRL HW
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NOLENSVILLE PK Sevenmile Creek DR 1
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Mill Creek Sorghum Branch ANTIOCH P
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HART LN BRICK CHURCH PK I- 65 §¨
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SUMMERLY DR W HILLWOOD DR DARDEN PL
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Stones River STEWARTS FERRY PK reek
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SAUNDERSVILLE RD SHUTE LN ANDREW JA
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Cumberland River RIVER RD RIVER ROA
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Cumberla nd River Browns Creek DR 1
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Metropolitan Nashville - Davidson C
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Metropolitan Nashville Department o
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Reconnaissance Report for Flood Dam
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Extreme Temperatures Chronology of
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2010 Metro Mitigation Plan

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