2. 2.1. Title Page The title page must include: “Emergency Action Plan” title heading Official dam name (as specified in the Texas Inventory of Dams) Inventory number Owner’s name Author’s name Report date 2.2. Introduction The introduction must briefly describe the purpose of the EAP and provide general information about the dam. 2.2a. Purpose The purpose of an EAP is to provide a systematic means to: Identify emergency conditions threatening a dam. Expedite effective responses so as to prevent a dam failure. Prevent or reduce loss of life and property damage should a dam failure occur. This purpose must be stated concisely in the EAP. 2.2b. General Description of Dam A description of the dam and its location must include: name of dam name of stream location of dam latitude and longitude, in decimal degrees owner’s name, address, and phone number type of dam size classification downstream classification dam height, length, and crest width spillway types and capacities elevation at top of dam and spillway crest normal and maximum storage values impoundment surface area 2.2c. Responsibilities This section of the EAP must identify all of the following information: Person(s) responsible for the operation and maintenance of the dam. Person(s) responsible for observing the dam during extreme flooding events, during holidays, on weekends, and during normal conditions. Person(s) responsible for implementing each of the required phases of the EAP. Person(s) in charge of emergency response. Communication and coordination channels. Location of the incident command center or emergency operating center and Lines of succession and assumptions of responsibility necessary to ensure uninterrupted emergency-response actions under any conditions. 2.3. Notification Flowcharts As the dam owner, you are responsible for identifying distress conditions at the dam and notifying all the affected political jurisdictions and appropriate state and federal agencies of
[TX#####] EAP A copy of the EAP has been provided to the following individuals. Authority Name, Title, Phone Address Owner(s) and Representatives Office of Emergency Management [AAA County or AAA City] Emergency Management Coordinator [Name of Contact] Phone ###-###-#### Texas Department of Transportation District [###] [Name of Contact] Phone ###-###-#### Texas Commission on Environmental Quality (512) 239-0326 (daytime) (888) 777-3186 (after hours) Dam Safety Section, MC 177 P.O. Box 13087 Austin, TX 78711 Engineer [Company Name] [Name of Contact] Phone ###-###-#### Note: Include information for all counties and districts within the inundation area. [TX#####] Date Change Made Signature
Slides or severe erosion Skin slide or slough on slope of embankment. No further movement of slide and embankment crest not degraded. Watch Examine rest of embankment for other slides. Place stakes in slide material and adjacent to it for determining if further movement is taking place. Stakes, tape measure Distance between stakes Slide or erosion involving large mass of material, crest of embankment is degraded, no movement or very slow continuing movement. Watch Initiate 24-hour surveillance. Mobilize all available resources and equipment for repair operations to increase freeboard and to protect the exposed embankment material. Start filling sandbags and stockpile near slide area. Dozer, shovels, sources of earthfill, sandbags Distance between stakes Slide or erosion involving large mass of material, crest of embankment is degraded, progressively increasing in size. Possible Failure Continue monitoring and remedial actions as described above. Place additional material at the toe of the slope to stop the slide. Dozer, shovels, source of earthfill, pump Distance between stakes Slide or erosion involving large mass of material, crest of embankment is severely degraded, movement of slide is continuing and may reach pool level. Imminent Failure Downstream evacuation. Utilize all available equipment and personnel to sandbag the degraded slide area to prevent it from overtopping. Dozer, shovels, sandbags, pump Distance between stakes Sinkholes Sinkholes anywhere on the embankment or within 500 feet downstream from the toe. Watch Carefully walk the entire embankment and downstream area looking for additional sinkholes, movement, or seepage. Stakes, flagging Size, location Sinkholes with corresponding seepage anywhere on the embankment or downstream from the toe. Watch Initiate 24-hour surveillance. Monitor as above. Construct sandbag dike around the seepage exit point to reduce the flow rate. Start filling sandbags and stockpile near sinkhole. Dozer, shovels, pump Size, location Large sinkholes with corresponding seepage anywhere on the embankment or downstream from the toe. Possible failure Continue monitoring and remedial action as described above. Utilize sandbags to increase the freeboard on the dam if necessary. Sandbags, dozer, pump Size, location Sinkholes rapidly getting worse, seepage flowing muddy water and increasing flow. Imminent failure Downstream evacuation. Utilize all available equipment and personnel to attempt to construct a large ring dike around the area. Dozer, shovels, pump Size, location 5 General Observation Specific Observation Condition Emergency Action Equipment, Material and Supplies Data to Record
Settlement Obvious settlement of the crest of the embankment, especially adjacent to concrete structures. Watch Look for bulges on slope or changes in crest alignment. None Size, location Settlement of crest of embankment that is progressing, especially adjacent to concrete structures or if any corresponding seepage is present. Watch Initiate 24-hour surveillance. Mobilize all available resources for repair operations to increase freeboard. Fill and stockpile sandbags. Identify any boils near settlement points for flowing material and pursue action for boils. Sandbags, dozer, shovels, source of earthfill Size, location Settlement of crest of embankment that is rapidly progressing especially adjacent to concrete structures or if any corresponding seepage is flowing muddy water or increasing flow. Possible failure Continue monitoring and remedial actions as described above. Use sandbags to increase the freeboard on the dam if necessary. Sandbags, shovels, dozer, source of earthfill Size, location Progressing settlement that is expected to degrade the embankment to reservoir level. Imminent failure Downstream evacuation. Utilize all available equipment and personnel to build up the crest in the area that is settling. Identify any boils near settlement points for flowing material and pursue action for boils. Dozer, shovels, source of earthfill, sandbags Size, location Cracking Cracks in the embankment crest or on slopes. Watch Walk on entire crest and slope and check for additional cracking. Stakes, tape measure Size, location Numerous cracks in crest that are enlarging, especially those perpendicular to the centerline of the dam. Watch Initiate 24-hour surveillance. Carefully monitor and measure cracking to determine the speed and extent of the problem. Mobilize to fill cracks. Cracks parallel to the centerline indicate a slide. Follow remedial action for slides. Stakes, tape measure, dozer, shovels, source of earthfill Size, location Large cracks in the crest that are rapidly enlarging, especially those perpendicular to the centerline of the dam. Possible failure Continue monitoring and remedial action as described above. Dozer, shovels, source of earthfill Size, location Cracking that extends to pool elevation. Imminent failure Downstream evacuation. Continue remedial actions as described above. Dozer, shovels, source of earthfill Size, location 5 General Observation Specific Observation Condition Emergency Action Equipment, Material and Supplies Data to Record
Cracking or movement of concrete structure Minor cracking and/or movement. Watch Immediately install measuring device to monitor movement. Crack Monitors, stakes, tape measure Size, location Significant cracking and/or movement. Watch Initiate 24-hour surveillance. Lower burlap on upstream face of crack to reduce flow of soil particles. Dump rockfill downstream of moving concrete structure monolith to resist the movement. Burlap, rockfill, dozer, shovels Size, location, flow rate Serious cracking and/or movement Possible failure Continue monitoring and remedial action as described above. Dozer, rockfill, burlap, crack monitors Size, movement, flow rate Major cracking and/or movement Imminent failure Downstream evacuation. Continue monitoring and remedial actions as described above. Dozer, shovels, rockfill Size, location, flow rate Upstream Whirlpool Whirlpool in the lake in the vicinity of the embankment Imminent Failure Downstream evacuation. Attempt to plug the entrance of the whirlpool with riprap from the slope of the embankment. Search downstream for an exit point and construct a ring dike to retard the flow of soil particles. Dozer, source of earthfill, sandbags, filter cloth, straw, rocks Size, location, flow rate Broken gate Structural member of a gate or gate operator broken or severely damaged so as to prevent operation of the gate Possible failure Initiate 24-hour surveillance. Immediately place stop logs in front of gate and initiate necessary actions to get gate repaired. Crane and welder Type of problem, location Rapidly rising lake level rising and rain continuing Watch Initiate 24-hour surveillance of lake level and rainfall. Lake level, rainfall Dam being overtopped Water flowing over the dam and lake continuing to rise Possible failure Downstream evacuation. Continue monitoring. Lake level, rainfall
Was the outlet gate operable? □ Yes □ No If no, describe actions taken and date: Do the Notification Flowcharts require revision? (Note that revision of the contact information will not require EAP approval; however, the revised contact information pages will need to be redistributed as a replacement pages.) □ Yes □ No If yes, list the dates of the contact information revision and redistribution: Was annual training or an exercise conducted? □ Yes □ No Circle: training exercise Date conducted: Are inspection and training records included in the EAP? □ Yes □ No Was the EAP reviewed? □ Yes □ No If yes, review date: Were changes required to the EAP? □ Yes □ No If yes, date of revised EAP approval: [Name and Title of Appropriate Manager for Owner] Date 8 This plan will be reviewed and updated annually and table top exercises will be conducted at least once every five years. Document these reviews below. Date of review: Participants: Date of review: Participants: Date of review: Participants: