2010 Metro Mitigation Plan

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performed. Primarily a rural portion of the county, flood damages within this watershed are generally attributable to rapid residential development without adequate stormwater controls in the upstream watershed areas combined with development along streams whose floodplain areas were not previously defined and regulated. Repetitive Loss Areas The repetitive loss area is located at the confluence with the Harpeth River (Appendix C, Figure C.5). Currently, there is one property reporting repetitive losses due to flooding on Buffalo Creek. In addition, the associated repetitive loss areas encompass 13 properties. Mill Creek Watershed The Mill Creek Watershed has a drainage area of 72.3 square miles and is located in southeastern Davidson County. Mill Creek flows in a northerly direction and discharges into the Cumberland River. Mill Creek flows through several miles of highly developed properties and, therefore, provides valuable green space to thousands of local residents. The stream's vegetated riparian zones provide a natural corridor for urban wildlife, shade the stream, and furnish opportunities for scenic and recreational experiences in an urban setting. The Mill Creek Watershed is experiencing intense pressure from adjacent and surrounding development. Surface runoff, point source pollution, riparian zone destruction, bank erosion, and floodplain encroachment are causing significant water quality deterioration and loss of natural floodplain functions and values. Future flooding conditions and stream ecological degradation will worsen as land development continues to stress Davidson County watersheds. Damage Reaches One damage reach has been identified on Tributary 1 of Mill Creek, and it extends from Rader Ridge Road upstream about 2060 feet from Stream Mile 1.31 to Stream Mile 1.70 on Tributary A (see Appendix C, Figure C.6a). Flooding problems in this area is due primarily to development in the natural floodplain. Delineation of the floodplain within the area is also a concern. Table 4-9 provides specific damage information for the damage reach. Repetitive Loss Areas The repetitive loss area is identified as the right bank of Mill Creek Mainstem extending approximately from Thompson Lane downstream to Murfreesboro Pike (Appendix C, Figure C.6b). Currently, there are six properties reporting repetitive losses due to flooding on Mill Creek. In addition, the associated repetitive loss areas encompass 120 properties. Metropolitan Nashville - Davidson County Hazard Identification Multi-Hazard Mitigation Plan Page 4-26 April 2010
Damage Reach Table 4-9. Mill Creek Tributary 1 Damage Reach Information Mill Creek - Trib 1 Buildings in floodplain 20 Buildings that have first floor living spaces that are inundated at the existing conditions 100-year flood level 11 Buildings that have first floor living spaces that are inundated at the future conditions 100-year flood level 16 Homes located in the designated floodway 0 Homes flooded at existing 2-year flood level 0 Homes flooded at existing 10-year flood level 0 Flood damages begin at a recurrence interval of (years)
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Metropolitan Nashville-Davidson Cou
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4.2 Vulnerability Assessment ......
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Page 7 and 8: USDA USGA WCT WNV United States Dep
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Page 12 and 13: equired revision every 5 years. The
Page 14 and 15: Figure 2-1. Metropolitan Nashville-
Page 16 and 17: Subarea 1 - Joelton Joelton is loca
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Page 24 and 25: Figure 3-1. Similarity Between DMA
Page 26 and 27: Step 2: Involve the Public In addit
Page 28 and 29: Step 5: Assess the Problem Once the
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Page 40 and 41: management. Total storage capacity
Page 42 and 43: infrequent occurrence. There has ne
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Page 46 and 47: WATERSHED Table 4-3. Major Sources
Page 48 and 49: All streams within Metro Nashville,
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Page 72 and 73: Cumberland River The Cumberland Riv
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Page 80 and 81: Figure 4-10. Evidence of Landslides
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Page 104 and 105: Past Occurrences Several severe tor
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Past Occurrences There have been 16
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Critical Facilities Of significant
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Scientific Name Common Name Federal
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Historic and Natural Resources are
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West Nile Virus is spread through m
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DAM & LEVEE FAILURES Risk - Moderat
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WNQM AM 1300; WUPX UPN 30; WVOL AM
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Table 4-31. Earthquake Hazard Damag
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Figure 4-25 Tornado Siren Locations
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Table 4-33. Metropolitan Nashville-
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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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(This page has been left blank inte
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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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