ASCE WORKSHOP ASCE WORKSHOP TEXAS FLOODPLAIN MANAGEMENT ASSOCIATION TEXAS FLOODPLAIN MANAGEMENT ASSOCIATION Selection Process and Application of a Selection Process and Application of a Flood Early Warning System Flood Early Warning System Presented by: Hays County & Envirosoph Technologies
INTRODUCTION INTRODUCTION Tim Vande Vorde, CET Tim Vande Vorde, CET Operations Superintendent Operations Superintendent Hays County Road & Bridge Department Hays County Road & Bridge Department With the county for 10 years. With the county for 10 years. Oversee most day- -to to- -day and long term operations of dept. day and long term operations of dept. Oversee most day Supervisor of construction/environmental inspection staff, Supervisor of construction/environmental inspection staff, most contract work, and an erosion control maintenance crew. most contract work, and an erosion control maintenance crew. Plan and schedule capital improvement and maintenance Plan and schedule capital improvement and maintenance projects. projects. Liason for the department to the Hays County/San Marcos for the department to the Hays County/San Marcos Liason Emergency Operations Centers. Emergency Operations Centers. NICET certified in Traffic Operations. NICET certified in Traffic Operations. FEMA certified in the National Incident Management System FEMA certified in the National Incident Management System (NIMS). (NIMS).
Hays County Road & Bridge Department Hays County Road & Bridge Department & General Information & General Information In 2007, Hays County had approximately 141,480 residents. In 2007, Hays County had approximately 141,480 residents. As of January 2009, there are 740 miles of county- As of January 2009, there are 740 miles of county -maintained maintained roadways. roadways. There are over 200 water crossings in the county (41 major) There are over 200 water crossings in the county (41 major) helping to justify our claim within FLASH FLOOD ALLEY. helping to justify our claim within FLASH FLOOD ALLEY. TxDOT inspects 8 off- -system bridges for the county. system bridges for the county. TxDOT inspects 8 off Hays County maintains 5 flood control dams west of San Hays County maintains 5 flood control dams west of San Marcos. Marcos. Over the last decade, Hays County has experienced 5 major Over the last decade, Hays County has experienced 5 major flood events causing significant damage to roads. flood events causing significant damage to roads. All 16 early warning sites have the Mark X units installed. All 16 early warning sites have the Mark X units installed. Began installing units in 2007. Began installing units in 2007.
Hays County FEMA Grant Hays County FEMA Grant Hays County was awarded a FEMA Hazard Mitigation Grant (HMGP) Hays County was awarded a FEMA Hazard Mitigation Grant (HMGP) The amount was for $600,000 to install an early warning system on The amount was for $600,000 to install an early warning system o n low- -water crossings in Hays County. water crossings in Hays County. low The county added an $200,000 to the project for a total of $800,000. The county added an $200,000 to the project for a total of $800, 000. After selecting Envirosoph Technologies (previously Watermark After selecting Envirosoph Technologies (previously Watermark Safety), it was determined that 16 low- Safety), it was determined that 16 low -water crossings could be water crossings could be outfitted with the devices. outfitted with the devices. Hays County has made one attempt at securing another grant for Hays County has made one attempt at securing another grant for electronic gates/arms at a couple of the more frequent locations, , electronic gates/arms at a couple of the more frequent locations but it was not approved by FEMA. but it was not approved by FEMA. Comal County has approached me recently regarding our system Comal County has approached me recently regarding our system of early warning devices and have applied for a grant from FEMA. of early warning devices and have applied for a grant from FEMA.
Process Hays County used to set up a matrix for Process Hays County used to set up a matrix for flood- -prone locations: prone locations: flood Frequency of flooding (installing barricades) years 1998- - Frequency of flooding (installing barricades) years 1998 2005. 2005. Accident data from the Texas DPS years 2001- -2005. 2005. Accident data from the Texas DPS years 2001 Fatalities from DPS on same section of road as crossing. Fatalities from DPS on same section of road as crossing. Growth factor (areas of current subd./business Growth factor (areas of current subd./business applications). applications). No outlet factor (one way in/out on road with crossing). No outlet factor (one way in/out on road with crossing). Total score of all criteria used. Total score of all criteria used.
Matrix high - 5 Prioritization of low-water crossings 98-05 01-05 01-05 aver - 3 No Outlet ADT Rank Hays County Road Pct. Events Accidents Fatalities Growth Factor Volume Total 1 Hilliard Rd, CR 222 4 5 44 1 5 10 4700 65 4 Jacobs Well Rd, CR 182 3 8 32 0 5 0 4000 45 5 Wayside Dr, CR 179 3 10 23 2 3 0 38 6 Windy Hill Rd, CR 131 2 5 28 0 3 0 36 7 Bell Springs Rd, CR 169 4 7 25 0 3 0 35 8 Post Rd, CR 140 1 7 20 0 5 0 1100 32 9 Rohde Rd, CR 126 2 7 16 0 5 0 28 10 Elder Hill Rd, CR 170 4 6 17 0 5 0 1500 28 11 Trautwein Rd, CR 185 4 9 10 0 5 0 24 12 York Creek Rd, CR 262 1 11 0 0 3 10 24 13 Mt. Gainor Rd, CR 220 4 5 15 0 3 0 500 23 14 Little Arkansas Rd, CR 174 3 10 0 0 3 10 23 15 Hidden Valley Rd (Wimberley) 3 8 0 0 5 10 23 20 Chaparral Road 2 2 0 0 5 10 17 REPLACEMENT 21 Uhland Rd, CR 161 1 10 0 0 5 0 15 REPLACEMENT 23 River Rd @ CR 1492 (Wimberley) 3 10 0 0 5 0 15 REPLACEMENT 2 3 40 1 5 10 4700 59 Lime Kiln Road 4 SKIPPED: Utility Construction 3 Old Bastrop Hwy, CR 266 1 12 37 0 5 0 1400 54 SKIPPED: Bridge Construction 16 7 0 0 5 10 22 Bear Creek Pass (Bear Creek Est.) 4 SKIPPED: For site with more traffic 17 Garison Rd 2 8 0 0 3 10 21 18 Spoke Hollow Rd, CR 314 3 6 0 0 3 10 19 19 Carpenter Ln 2 4 0 0 3 10 17 22 Plum Creek Rd South, CR 156 2 10 0 0 5 0 15 24 Francis Harris Ln, CR 265 1 11 0 0 3 0 14 25 Bunton Rd, CR 151 1 9 0 0 5 0 14 26 Gatlin Creek Rd, CR 191 4 7 4 1 3 0 15 27 Cotton Gin Rd, CR 129 1 8 0 0 5 0 13 28 Satterwhite Rd, CR 107 2 8 0 0 5 0 13 29 Cotton Gin Rd, CR 129 2 8 0 0 5 0 13 30 Grist Mill Rd, CR 153 2 9 0 0 3 0 12 31 Turnersville Rd South, CR 212 2 7 0 0 5 0 12 32 Heidenreich Ln, CR 152 1 8 0 0 3 0 600 11 33 Valley View Dr (Burnett Ranch Est.) 3 8 0 0 3 0 11 34 Hugo Rd, CR 214 3 8 0 0 3 0 11 35 Old Martindale Rd, CR 295 1 6 0 0 5 0 450 11 36 CR 158 1 7 0 0 3 0 10 37 Cole Springs Rd, CR 148 2 7 0 0 3 0 10 38 Harris Hill Rd, CR 160 1 6 0 0 3 0 9 39 Kelly Smith Rd, CR 149 2 5 0 0 3 0 8 40 Mt. Sharp Rd, CR 219 3 5 0 0 3 0 8 41 Hillside Terrace Rd, CR 133 2 4 0 0 3 0 1800 7
ELEMENTS OF THE MARK X DEVICE ELEMENTS OF THE MARK X DEVICE Uses interruption of low- -volt signal as basis for measurement. volt signal as basis for measurement. Uses interruption of low Uses a solid state sensor strip with 24 sensors, making it very reliable Uses a solid state sensor strip with 24 sensors, making it ve ry reliable during times of debris. during times of debris. Communicates wirelessly or hard- Communicates wirelessly or hard -wired. wired. Uses radio, satellite or telephone service depending on the best reception. est reception. Uses radio, satellite or telephone service depending on the b Uses ½ ½ inch steel throughout the setup. inch steel throughout the setup. Uses Repeaters are not needed. Repeaters are not needed. Base station will be at Envirosoph Technologies operating center. ter. Base station will be at Envirosoph Technologies operating cen Continuous monitoring and running of diagnostics by Envirosoph h Continuous monitoring and running of diagnostics by Envirosop Technologies. Technologies. Device includes sign, flasher lights and a solar panel power unit (one for unit (one for Device includes sign, flasher lights and a solar panel power each direction). each direction). Standpipe installed near drainage channel houses electronics. Standpipe installed near drainage channel houses electronics. Sends a message to all predetermined personnel by text message, e e, e- -mail mail Sends a message to all predetermined personnel by text messag or pager alert when sensor is triggered. or pager alert when sensor is triggered. Helps response crews prioritize barricade placement throughout the t the Helps response crews prioritize barricade placement throughou county. county. Uses real- -time website map to communicate site status (off, operating, time website map to communicate site status (off, operating, Uses real flooding). flooding).
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