Emergency Action Plan Laramie River Station 347 Grayrocks Road Wheatland.Wyom1ng Owned by Missouri Basrn Power PrOJect Operated by Basm Electric Power Cooperative Wheatland. Wyoming 5-5 Progec. liJ-lI?E?H-l?t?! 20? t? Emergency Action Plan Emergency Action Plan For Laramie River Station 347 Grayrocks Road, Wheatland, WY County: Platte Counts:r Owner: Missouri Basin Power Proiect Operator: Basin Electric Power Cooperative La?mie River Station Contact?? Owner Mailing Address: 1717 Ea?t Interstate Avenue Bismarck North Dakota 58503-0564 Internet AECOM Action Plan_Final.Docx Emergency Action Plan Quality information Prepared by Checked by Approved by Shannon Allen, P.E. Paul Drew. P.E.. CFM Cliff Shierk. P.E. Certi?cation Statement CCR Units: Basin Electric Power Cooperative: Laramie River Station; Bottom Ash Ponds 1. 2. 8: 3: East and West Emergency Holding Ponds i, Clifford R. Shierk. being a Registered Professional Engineer in good standing in the State of Wyoming, do hereby certify. to the best of my knowledge. information. and belief that the information contained in this Emergency Action Plan has been prepared in accordance with the accepted practice of engineering. I certify, for the above referenced CCR Units, that the Emergency Action Plan dated April 2017 meets the requirements of 40 CFR 257.73. Clifford R. Shierk Printed Name April 17. 2017 Date Intemet AECOM Action Plan_FinaI.Dornr Emergency Action Plan Prepared for: Ms. Maria Tomac. P.E. Basin Electric Power Cooperative 1717 East Interstate Avenue Bismarck. North Dakota 58503-0564 Prepared by: Shannon Allen. RE. AECOM 558 North Main Street Oshkosh. WI 54901 aecom.com Copyright 2017 by AECOM Internet Action Plan_Final.Docx AECOM Emergency Action Plan Table of Contents 1. lmmductbnu +1 +1l'1'l +1 +1 Ff- +1 5+5 phi-111d 55+ +1 151 Ia-n'd-I in-t-e-n-tm- f+p+1p+1p+l l'1l1-1l'1' +1 I1I 'l II I1I I+1r l'1r+ 1.: Summary-1n r+1 l'1l- +1 5+1 153 m??ptb?n ?f Iqu-Indlmentauu II I1I ll r1I +Il'1r+1 l'1I +1 r+1 l'1++I Safety Emetrgency .. . 2.51 De?mtmn nfs'retr Emery?! Ir+r +1I-1w 11 +1 FIG-I F1511 +1 l'+1+2.2 EAPReeponse Process 2.2.2 Emergency Level Determination .. . .. .. :55 2.2.2.2 Non-Failure Level of Emergency :1 2.2.2.5 Potential Failure Level ..1 2.2.2.1 Imminent Faiure Level ol? .. .. 2.2.5 Noti?cation and Communication .. .. . .5 2.2.5.2 Nolilicetion to Emergency Management15m51itiee 5 2. 2. 5. 5 Statue Updatee? .. ..5 2 2.1 Emergency .. .. . . .. .. .. .5 2.2.1.1 High Flow Level o1 Emergency-I. 2.2.1.2 Non-failure Level of Emergency 2.2.1.5 Potential Failure Level ot..5 2.2.1.51 Embankment De?cienciec . . . ..5 2. 2. 1. 5. 2 Seepage Through Embankment .. .. .-. . 2.2.1.1 Imminent Failure Level ofEmargency 2.2.5.1 Reentry and Recoverym . .5 2.2. 5. 2 AlterAction .. .. .. . .. .. . .. 5 15 4.1 My 1a 1.2 Noti?cation 51:1 Conununication Re5poneibtlitie5 15 1.2.1 Noti?cation Flowchart 15 1.2.2 Emergency Noti?cation Lisle 15 1. 2. 5 Media ContactEvacuation .. .. 15 1.1 Monitoring. Security. Termination. and Follow-up .. . .. 11 1.5 EAP 5oordinalor 11 12 511 Euweillan?e an-d-Mm?o?ng-u 12 5.2 Evaluation of Detection and Reconnae Timing; 12 5.5 11115555 5.1 Response During P511555 51 Dam-1555.. 12 5.5 Heeponee During Wee?errd1 and Holiday5m 12 5.5 Response During Adverae Weather 12 5.5 Emergency Emotive: and information 15 5.5.1 Matarlal5 and Equipment 15 555551511552 totem-1 1555-11 51551555151 EmmancyAslion Finn 5.8.2 5.9 5.11 Alternative Systems of Commisa?on 5.12 Public Awareness and Tables Table 1. CCR Surface lmpoundment Appendices Appendix A Figures A.1 Site Location Map AZ Site Vicinity Map A.3 Facility Layout Diagram A.4 Adjacent Preperty Owners Map A.5 Hydraulic Shadow Map A.6 lmpoundment Plan and Sections A.7 Dam Failure Analysis Summary Tables Available Resources . AnnuaiReuiemTrair-mg and .. . Appendix Charts and Tables 3.1 B2 3.3 5.4 3.5 .6 Summary of EAP Responsibilities Summary of Owner Responsibilities Guidance for Determining the Emergency Level Level of Emergency Determination Chart Noti?cation Flowcharts Available Resources Chart Appendix 0- Blank Forms and Log Sheets C. 1 0.2 0.3 0.4 0.5 Concurrence Communication Documentation Chart List of Holders, Receipt Con?rmation. and Emergency Action Plan Updates Emergency Incident Log Emergency Termination Log Appendix - Glossary Intemet Action Plan_Flnal.Docx 13 IrlrfI-l-IC v+r?1+l 13 14 14 AECOM Emergency Action Plan 1. Introduction 1.1 Purpose and Intent This Emergency Action Plan (EAP) was developed to provide a single source of information in the event of an emergency as required for CCR impoundments determined to be either a high hazard potential or signi?cant hazard potential CCR impoundment per section ?257.73 of the US. Environmental Protection Agency (EPA) Final Rule: Disposal of Coal Combustion Residuals from Electric Utilities. The purpose of an Emergency Action Plan (EAP) is to provide the ownerloperator of the OCR impoundments with a clear plan of action when any emergency arises. An emergency is identi?ed as any condition which: 0 Develops unexpectedly; . Endangers the structural integrity of the impoundment; and 0 Could result in the impoundment's failure. requiring immediate action. By writing and implementing an EAP the owner/operator of the impoundment can reduce the risk of human life loss or injury and minimize property damage during an unusual or emergency event. This is an EAP for the ?ve (5) CCR surface impoundments operated by Basin Electric Power Cooperative (BEPC) at the Laramie River Station (LRS) in Wheatland, Wyoming. The EAP provides a description of the impoundments and the area at risk as well as contact information for all parties involved in responding to or affected by an emergency at the impoundments. The EAP outlines what actions are required in the event of an emergency. 1.2 EAP Summary This document includes: De?nition of the events or circumstances involving the ?ve CCR impoundments that represent a safety emergency and the procedures that will be followed to detect a safety emergency in a timely manner. - Site location map delineating the area which would be affected in the event of a CCR impoundment failure. I Contact telephone numbers for individuals that must be contacted in the event of an emergency. their respective responsibilities. and noti?cation procedures. . Procedures following an emergency at the impoundments. - Provisions for an annual face?to-face meeting or exercise between representatives of the OCR unit and the local emergency responders. The plan will be implemented once events or circumstances involving the OCR impoundment represent a safety emergency is detected. including conditions identi?ed during periodic structural stability assessments. annual inspections. and inspections by a quali?ed person. The responsibilities for responding to an incident and implementing the plan are included in the Summary of EAP Responsibilities and Summary of Owner Responsibilities in Appendix B. One copy of this plan will be kept at the Laramie River Station of?ce. The plan will be amended if the owner or operator of the OCR impoundments whenever there is a change in conditions that would substantially affect the EAP in effect. This plan will. at a minimum. be evaluated every ?ve years to ensure the information required is accurate. If the owner or operator of the OCR impoundment determines during a periodic hazard potential assessment that the OCR impoundments are no longer classi?ed as signi?cant hazard potential CCR impoundments. then the owner or operator is no longer subject to the requirement to prepare and maintain a written EAP. Intemet AECOM Action Plan_FinaI.Docx Emergency Action Plan 1.3 Description of Impoundments The Laramie River Station (LRS) is located at 347 Grayrocks Road in Wheatland, Wyoming. LRS has ?ve (5) CCR surface impoundments which are described in Table 1. Table 1. CCR Surface Impoundment Description Bottom Ash Bottom Ash Bottom Ash East West Pond 1 Pond 2 Pond 3 Emergency Emergency Holding Pond Holding Pond Type of Impoundment Earthen Earthen Earthen Earthen Earthen Height of Impoundment 25.0 feet 25.0 feet 50.0 feet 20.5 feet 20.5 feet Max Impoundment 995 acre-feet 1.5642 995 acre-feet Storage Capacity (Ponds 1 a 2 Combined) acre-feet (East and West Ponds Combined) Use of impoundment COR Operations CCR Operations CCR CCR CCR Operations Operations Operations Hazard Rating Signi?cant Signi?cant Signi?cant Signi?cant Signi?cant Bottom Ash Ponds 2. and 3 are located immediately north of Grayrocks Road in the southwest portion of the property. The East and West Emergency Holding Ponds are located north of the Laramie River Station plant and immediately northeast of the on-site railroad in the northeast portion of the property. The locations of the impoundments are shown on the Facility Layout Diagram included in Appendix A. AECOM prepared a hazard potential classi?cation assessment in March 2016 for each of the ?ve (5) COR surface impoundments. Signi?cant upstream and features which could be affected by a failure are included on the Hydraulic Shadow Maps included in Appendix A. interns! AECOM Action Plan_Final.Docx 2 Emergency Action Plan 2. Safety Emergency 2.1 De?nition of Safety Emergency A safety incident is an impending or actual sudden uncontrolled release or excessive controlled release of water from an impounding structure. The release may be caused by damage to or failure of the structure. ?ood conditions unrelated to failure, or any condition that may affect safe operation. The release of water may or may not endanger human life, property, or the operation of the structure. LRS is a zero discharge facility and does not discharge water from the bottom ash ponds or emergency ponds. All water discharged to the ponds, via siuicing, or precipitation is held within the ponds and/or recirculated to the plant. The recirculation of water between plant and these ponds is balanced whereas water is withdrawn from the ponds at nearly the same rate as it is discharged (sluiced) to the ponds. During normal plant operation, there is no net change in pond levels. Plant operators perform operating inspections of the plant facilities once per (8-hour) shift and visually monitor water levels in the pond and observe the embankments for any de?ciencies. Emergency action should be taken if the pool elevation is 1.5 feet below the design embankment crest elevation or if de?ciencies are observed in the perimeter embankments. AECOM performed a slope stability evaluation in October 2016 to evaluate the existing CCR impoundment dikes and native subgrade soils with regard to static and seismic slope stability as recommended by the EPA Site Assessment Report. Based on the results of the stability evaluation, the perimeter dikes for all ?ve CCR impoundments were considered stable with respect to normal. ?ood. temporary construction, and seismic conditions. 2.2 EAP Response Process There are generally four steps that should be followed when an unusual or emergency incident is detected. The steps constitute the EAP response process and are as follows: Incident detection and evaluation Emergency level determination Noti?cation and communication Emergency Actions Termination and follow-up These steps are discussed further in the following subsections. 2.2.1 Incident Detection and Evaluation An incident would be considered an unusual or abnormal condition and could be observed using the following: 1. Detecting existing or potential failures. 2. Measuring water level. Normal water level within the impoundments should be 1.5 feet below the design embankment crest elevation. 3. Reviewing monitoring equipment such as sensors or early warning systems. 4. Checking instrumentation. 5. Analyzing and con?rming data. 2.2.2 Emergency Level Determination After an unusual event or incident is detected and continued. the event should be categorized into one of the established emergency levels based on the severity of the initiating condition or triggering events. The levels of emergency are: lntemet AECOM Action Plan_Finai.Docx 3 Emergency Action Plan a High Flow 0 Non-Failure 0 Potential Failure 0 Imminent Failure It is important to determine the severity of the emergency before responding to an unusual event at the impoundments. The Guidance for Detennining the Emergency Level table and Level of Emergency Detennination Chart included in Appendix are to be used to determine the severity of the emergency and to guide the owner/operator's actions during an emergency response. Descriptions of the levels of emergency are provided in the following subsections. 2.2.2.1 High Flow Level of Emergency The High Flow emergency level indicates that ?ooding is occurring at LRS. but there is no apparent threat to the integrity of the impoundment. The High Flow emergency level is used by the owner to convey to outside agencies that areas may be affected by the impoundment's release. Although the amount of ?ooding may be beyond the control of the owner. information on the timing and amount of release from the impoundment may be helpful to authorities in making decisions regarding warnings and evacuations. 2.2.2.2 Non-Failure Level of Emergency The Non-Failure emergency level is appropriate for an event that will not, by itself, lead to a failure. but requires investigation and noti?cation of internal andlor external personnel. Examples are: 1. New seepage or leakage on the side of the impoundment. 2. Presence of unauthorized personnel. 3. Malfunction of the pump system used to balance the ?ow of the site. Some incidents may only require internal response. whereas others may lead to unexpected high releases that could pose a hazard to the public and would require the noti?cation of outside agencies. 2.2.2.3 Potential Failure Level of Emergency The Potential Failure emergency level indicates that conditions are developing that could lead to a failure. Examples are: 1. Rising reservoir levels that are approaching the top of the non-over?ow section of the impoundment 2. Transverse cracking of an embankment 3. A veri?ed bomb threat. Potential Failure should convey that time is available for analyses. decisions. and actions before the impoundments could fail. A failure may occur. but predetermined response actions may moderate or alleviate failure. 2.2.2.4 Imminent Failure Level of Emergency The Imminent Failure emergency level indicates that time has run out. and the impoundment has failed. is failing. or is about to fail. imminent Failure typically involves a continuing and progressive loss of material from the impoundment. It is not usually possible to determine how long a complete breach of the impoundment will take. Therefore. once a decision is made that there is no time to prevent failure, the Imminent Failure warning must be issued. For purposes of evacuation. emergency management authorities may assume the worst-case condition that failure has already occurred. internal AECOM Actlon PIan_Final Dom: 4 Emergency Action Plan 2.2.3 Noti?cation and Communication 2.2.3.1 EAP Noti?cation Flowchart After the emergency level at the dam has been determined. noti?cations are made in accordance with the EAP Noti?cation Flowchart. The purpose of the EAP Noti?cation Flowchart is to provide a visual map of who is to be noti?ed. the order of noti?cation, and who is responsible for notifying various individuals and agencieslorganizations. The Noti?cation Flowchart can be customized based on the level of emergency as determined under the Level of Emergency Determination Chart. The AgencyIOrganization Noti?cation List should be used as a quick reference for contact information for the Noti?cation Flowchart. It can be customized based on the level of the emergency. The Emergency Action Plan Noti?cation Flowchart for the LRS impoundments can be found in Appendix and was last updated on the date shown on the bottom of the page. The AgencyIOrganization Noti?cation List can be found in Appendix and was last updated on the date shown on the bottom of the page. The Notification Flowchart will be activated with a telephone call to the Laramie River Station Contact, Contact with Platte County Emergency Management will be maintained throughout the emergency by phone. See Appendix for the Emergency Communication Plan. 2.2.3.2 Noti?cation to Emergency Management Authorities When performing noti?cation and communication activities. it is important that people speak in clear, nontechnical terms to ensure those being noti?ed understand what is happening, what the current emergency level is. and which actions to take. To assist in this step, pre-scripted messages to help the caller adequately describe the emergency situation to emergency management authorities are included on the Noti?cation Flowcharts included in Appendix B. 2.2.3.3 Status Updates After initial notification. the owner should make periodic status reports to the affected emergency authorities and other stakeholders in accordance with the Noti?cation Flowcharts. if it appears that the situation is continuing to deteriorate despite actions being taken to moderate or alleviate the failure, local authorities may decide to change their course of action. Depending on location of residents and the estimated time required to warn them. the evacuating agencies may consider early evacuation or continued warnings until the emergency has passed. 2.2.4 Emergency Actions After the initial noti?cations have been made. the owner will act to save the impoundments and minimize impacts to life. property. and the environment. During this step. there is a continuous process of taking actions. assessing the status of the situation. and keeping others informed through communication channels established during the initial noti?cations. The EAP may go through multiple emergency levels as the situation improves or deteriorates. The following subsections include speci?c actions to minimize impacts. The areas which would be affected in an emergency are indicated on the Shadow Map included in Appendix A and discussed further in Section 3 of this EAP. 2.2.4.1 High Flow Level of Emergency In the event that pool elevations exceed 1.5 feet below the design embankment crest elevation. the following procedures should be followed: 1. Monitor remaining freeboard between interconnected ponds. Ponds with lesser remaining freeboard shall be pumped toward ponds having greater remaining freeboard utilizing the on-site pumps located in the pump houses. Internet AECOM Action Pian_Final.Docx 5 Emergency Action Plan 2.2.4.2 Non-failure Level of Emergency In the event that a situation is not normal but has not yet threatened the operation or structural integrity of the impoundment(s). the following procedures should be followed: 1. The impoundment should be inspected by personnel at LRS. At minimum, inspect the full length of the upstream slope, crest. toe. and slope of the embankment. Also check the impoundment area for signs of changing conditions. If increased seepage, erosion, cracking, or settlement is observed, immediately report the observed conditions to the EAP coordinator and refer to the emergency level table in Appendix for guidance in determining the appropriate event level for the new condition. 2. Record all contacts that were made and record all information, observations, and actions taken. Note the time of changing conditions. Document the situation with photographs and video, if possible. 2.2.4.3 Potential Failure Level of Emergency In the event that a situation may eventually lead to embankment failure and ?ash flooding but there is not an immediate threat of dam failure, the following procedures should be followed: 1. Initiate contacts as outlined in the Noti?cation Flowchart in Appendix and inform parties that the EAP has been activated and, if conditions get worse, the emergency level may increase and the emergency situation may require evacuation. Preparations should be made for possible road closures and evacuations. 2. Provide updates to the Platte County Emergency Management Coordinator to assist them in making timely decisions concerning the need for warnings, road closures, and evacuations. 3. If time permits, inspect the impoundment. At minimum, inspect the full length of the upstream slope. crest, toe, and slope of the embankment. Also check the impoundment area for signs of changing conditions. If piping, increased seepage. erosion. cracking, or settlement is observed, immediately report the observed conditions to the Platte County Emergency Management Coordinator and refer to the emergency level table in Appendix for guidance in determining the appropriate event level for the new condition. 4. Record all contacts that were made and record all information. observations, and actions taken. Note the time of changing conditions. Document the situation with photographs and video, if possible. 5. If time permits, remedial actions should be taken for the conditions described in the following sections. 2.2.4.3.1 Embankment De?ciencies In the event that de?ciencies are observed in the perimeter embankments. the following procedures should be followed: 1. Lower the water within the impoundment to a level below the observed de?ciency. Water in adjacent impoundments may also need to be lowered to maintain an equal head of pressure against the berm between impoundments. 2. Install temporary controls as necessary to control the de?ciency. 3. Perform a ?eld investigation to determine the cause of the de?ciency. 4. Determine and implement corrective measures. 2.2.4.3.2 Seepage Through Embankment A subsurface investigation performed by AECOM encountered granular and unsaturated materials in the dike and native foundation soils. In addition, the impoundments are lined. During the EPA Site Speci?c Internet AECOM Action PIan_Flnal.Docx ti Emergency Action Plan Assessment, seepage along the impoundment dikes were not observed. which suggests the pond liners are functioning as designed and are generally limiting seepage through the impoundment dikes. Minor amounts of seepage will occur through most liner materials; however a signi?cant tear. puncture or deterioration of the liners could cause signi?cant seepage. Signi?cant seepage is typically identi?ed by saturated soil conditions andlor soft. wet. compressible pockets of soil on the exterior slopes of the dikes. Consistent. long-tenn seepage is often accompanied by the growth of phreatophytic water loving) vegetation in the area where seepage is occurring. In the event that seepage is observed in the perimeter embankments, the following procedures should be followed: 1. Lower the water within the impoundment to a level below the seepage. Water in adjacent impoundments may also need to be lowered to maintain an equal head of pressure against the berm between impoundments. Perform a ?eld investigation to determine the cause of the seepage. Determine and implement corrective measures. 2.2.4.4 Imminent Failure Level of Emergency In the event that embankment failure is imminent or in progress. the following actions should be taken: 1. Contact the Platte County Emergency Management Coordinator and others listed on the Noti?cation Flowchart in Appendix immediately. 2. The Platte County Emergency Management Coordinator shall lead the efforts to carry out warnings. close roads. and evacuate people at risk 3. The Platte County Emergency Management Coordinator shall alert the general public and immediately evacuate at-risk people and close roads as necessary. 4. Maintain continuous communication and provide the Platte County Emergency Management Coordinator with updates of the situation to assist himlher in making timely decisions concerning warnings and evacuations. 5. Record all contacts that were made and record all information. observations, and actions taken. Note the time of changing conditions. Document the situation with photographs and video. if possible. 6. Advise people monitoring the embankment to follow safe procedures. Everyone should stay away from any of the failing structures or slopes and out of the potential breach inundation areas. 2.2.5 Termination and Follow-Up Generally. the owner. or owner's dam safety expert is responsible for notifying the authorities that the emergency condition has been stabilized. Government of?cials are responsible for declaring an end to the public emergency response. The following subsections discuss termination and follow up procedures once the incident has been resolved. An Emergency Termination Log is included in Appendix to document conditions and decisions. 2.2.5.1 Reentry and Recovery Under potential failure and imminent failure scenarios. the emergency at the LRS lmpoundments will not be considered over until inspected by owner's engineer and the Platte County Emergency Management have been consulted. Evacuated residents will be allowed to return based on the plan developed by the Platte County Emergency Management. Internet AECOM Action Plan_Finnl.Docx Emergency Action Plan Once the emergency is declared over. owner's engineer will inspect the impoundments for any damage. The review may result in formal orders issued to the owner and may require the submittal of plans and speci?cations for repair. 2.2.5.2 AfterAction Review After an impoundment emergency is ended. a review of the event should take place as soon as practicable. If the review does not take place within 10 to 14 days of the emergency. valuable data may be lost. The following should be discussed and evaluated: 1. Events or conditions leading up to. during. and following the incident 2. Signi?cant actions taken by each participant and improvements for future emergencies 3. All and de?ciencies found in the incident management process, materials. equipment. staf?ng levels, and leadership. The review will determine what was done correctly during the EAP activation. what was done incorrectly and what could be improved. 4. Corrective actions identi?ed and a planned course of action to implement recommendations. The results should be documented in an After Action Report and used as a basis for revising the EAP. Any needed changes to the LRS Impoundment EAP will be made by Basin Electric Power Cooperative. An updated EAP including an updated ApprovallConcurrence will be provided to all holders of the EAP. A copy of the updated EAP will be kept in the shift supervisor?s of?ce and weekend duty superintendent?s of?ce. Internet AECOM Action Plan_Finei.Docx Emergency Action Plan 3. Hydraulic Shadow Map The purpose of the Hydraulic Shadow Map. or inundation map. is to provide a picture of the area that could be affected by a hypothetical failure of the impoundment in order to determine who must be noti?ed and/or evacuated during an emergency and the timeliness to facilitate noti?cation and evacuation. The Hydraulic Shadow Maps for the LRS impoundments were produced by AECOM based on the information from the Dam Failure Analysis. The maps can be found in Appendix A and was last updated on the date shown on the bottom of the page. For further information on the method used to produce the maps. please contact Basin Electric Power Cooperative. Several Hydraulic Shadow Maps were prepared in order to identify impacted areas based on the location of a breach in the impoundment. Due to the proximity of the 5 CCR impoundments to one another, the East and West Emergency Hold Ponds were combined in one Dam Failure Analysis and in general. Ponds 1. 2, and 3 were combined in another analysis. Each map indicates inundation zones. cross section information, streets. buildings. railroads. bridges, and any other signi?cant features. The Adjacent Property Owners Map included in Appendix A identi?es residences, businesses, bridges, and other structures such as roads, power lines. sewer. gas and water lines and other infrastructure that could be a?ected by the failure of the impoundment. Highlighted evacuation routes are also included on the map. Emergency response procedures will be similar for all 5 CCR impoundments; however the Hydraulic Shadow Maps show that different areas of the site will be impacted depending on where a breach in the impoundment occurs. lnternet AECOM Action Planfinal Dora: 9 Emergency Action Plan 4. General Responsibilities The owner is responsible for developing and maintaining the EAP. Owners and emergency management authorities are responsible for implementing the EAP. The Emergency incident Log form in Appendix 0 should be used to document incident-related events by all entities involved with EAP implementation. The following subsections specify the responsibilities of all entities to ensure that effective and timely action is taken if an emergency occurs. 4.1 Owner Responsibilities The owner is responsible for detecting and evaluating the safety incident. classifying the incident, notifying emergency management authorities. and taking appropriate response actions. Refer to Section 2.2.3 of this EAP for operator duties for given emergency response situations. 4.2 Notification and Communication Responsibilities 4.2.1 Noti?cation Flowchart Noti?cations are made in accordance with the EAP Notification Flowchart. Refer to Section 2.2.2.1 of this EAP for additional information and the Noti?cation Flowchart in Appendix B. 4.2.2 Emergency Noti?cation Lists Emergency Noti?cation Lists are lists of the names, addresses and telephone numbers of individuals. businesses, critical facilities and other entities who would be affected by a failure of the impoundments and who must be noti?ed and/or evacuated in an emergency. The lists have been grouped based on the severity of the emergency. The Emergency Noti?cation Lists for the LRS lmpoundments can be found in Appendix and were last updated on the date shown on the bottom of the page. 4.2.3 Media Contact Interaction with the media should be implemented through the local or State emergency management authority. These agencies should have a Public Information Of?cer (PIO) and/or a Joint information Center for disseminating information and handling inquiries. Local emergency management authorities may activate an Emergency Operations Center (EOC) to serve as a central co-ordination center for emergency response. warning. and evacuation activities. The owner or their representative should go to the E00 to help agency personnel understand the project speci?c information and inundation maps. Proper co-ordination and communication between the on-site technical personnel, PlOs and emergency personnel at the ECG are of critical importance to the successful implementation of the EAP. These activities should be thoroughly tested during comprehensive EAP exercises and modi?ed as necessary. 4.3 Evacuation Responsibilities Warning and evacuation planning and implementation are responsibilities of local emergency management authorities with the legal authority to perform these actions. Under the EAP. the owner is responsible for notifying the appropriate emergency management authority when an incident is anticipated. is imminent. or has occurred. The local emergency management authority is responsible for notifying and evacuating affected people. as necessary. Owners should not assume or usurp the responsibility of government entities for evacuation of people. However. there may be situations in which routine noti?cation and evacuation will not be suf?cient. as in the case of a residence located immediately that would be inundated within minutes of a Intemet AECOM Action Plan_Final.Docx 10 Emergency Action Plan failure. in some cases. owners may arrange to notify the residence directly. Such procedures should be coordinated with the appropriate authorities before an emergency situation develops. 4.4 Monitoring, Security, Termination, and Follow-up Responsibilities A person should be designated as an onsite monitor from the beginning of a safety incident until the emergency has been terminated. This person should provide status updates to the owner so the owner can keep all those involved with the implementation of the EAP informed of developing conditions. Termination of a safety emergency is usually twofold. The entity that activates the EAP is usually responsible for determining when the safety situation has stabilized. This is typically the owner in consultation with engineers and safety experts but may include other State and Federal regulatory entities. The applicable emergency management authorities. on the other hand, are responsible for termination of the emergency response activities, including termination of an evacuation. Both the owner and the emergency response authorities should coordinate closely while making decisions to terminate both the safety event and response efforts. Recovery activities will continue on different levels for all involved in the safety incident after the emergency has been terminated. The owner should coordinate a follow-up evaluation after any emergency. All participants should be involved in this evaluation and should keep logs and records during the incident. An Emergency Incident Log and Emergency Termination Log are included in Appendix C. The results of the follow-up evaluation should be documented in a written report (After Action Report) and used to improve future response actions. 4.5 EAP Coordinator Responsibilities The EAP Coordinator will be responsible for overall EAP-related activities, including but not limited to preparing revisions to the EAP, establishing training seminars. and coordinating EAP exercises. The LRS EAP coordinator is?and is the EAP contact for questions about the plan. Internet AECOM Action Plan_Final.Docx 1 1 Emergency Action Plan 5. Preparedness Preparedness typically consists of activities and actions taken before the development of an incident. Preparedness activities attempt to facilitate response to an incident as well as prevent. moderate. or alleviate the effects of the incident. The following subsections relate to preparedness actions. 5-1 Surveillance and Monitoring Prompt detection and evaluation of information from instrumentation and physical monitoring is critical to the effectiveness of the EAP and timely emergency response. The LRS impoundments are inspected by plant operators once per (8-hour) shift and visually monitor water levels in the pond. No other instrumentation monitoring equipment is in place. 5.2 Evaluation of Detection and Response Timing Total EAP implementation time from the initiation of an actual incident to determination of an emergency situation and noti?cation of appropriate entities involved with implementation should be evaluated and understood. 5.3 Access to the Site The primary access to reach the site by vehicle from the Town of Wheatland is from Highway WY-320 to Grayrocks Road. In the event that Grayrocks Road becomes ?ooded. East Fairview Road should be used as a secondary access route from Highway WY-320. Access to the site from the Town of Wheatland is anticipated to take about 15 to 20 minutes from both the primary and secondary route. During an imminent failure emergency event. on-site roads. ?eld trails. and the railroad near the impoundments should not be utilized in the event that these access points become ?ooded or damaged during the event. Coal is brought in by rail from the northwest. so the railroad should be contacted and noti?ed that access to the site may become compromised. Primary and secondary access routes for reaching the site are shown on the site location map included in Appendix B. 5.4 Response During Periods of Darkness The Laramie River Station has a light near the pump house but does not have any on-site lighting around the impoundments. If an event is identi?ed during periods of darkness. light plants stored at the yard maintenance should be used to illuminate the area where failures could occur. During a power failure. on-site backup diesel generators stored at the yard maintenance should be used to operate equipment where manual operation is not feasible. Diesel fuel is stored on-site in the fuel tanks. 5.5 Response During Weekends and Holidays The Laramie River Station is operated 24 hours a day. 7 days a week. Therefore. no special response is needed during weekends and holidays. Normal procedures should be followed. 5.6 Response During Adverse Weather The Laramie River Station is operated 24 hours a day. 7 days a week. Therefore. no special response is needed during adverse weather. Normal procedures should be followed. Refer to Section 5.3 for primary and secondary access to the site. lntemet AECOM Action Plan_Flnal Doc): 12 Emergency Action Plan 5.7 Alternative Sources of Power Diesel generators are available on-site as an alternative source of power. Fuel is stored in the fuel tanks located on-site. 5.8 Emergency Supplies and Information Planning and organizational measures that can help the owner and emergency management authorities manage an emergency situation more safely and effectively include stockpiling materials and equipment for emergency use and coordinating information between organizations. 5.8.1 Materials and Equipment in the event of a high water excursion event, on-site stop logs will be installed or sluice gates will be closed to limit ?ow of water entering the impoundment by LRS operators. On-site pumps permanently installed in the pump house will be utilized by LRS operators to lower the water level to ponds having greater remaining freeboard. In the event of embankment de?ciencies. water within the impoundments should be lowered by LRS operators below the observed de?ciency using the systems currently in place (stop logs. sluice. gates, and/or pumps) unless those systems are not able to address the issue ef?ciently. Temporary controls such as sand or rip rap may be installed by LRS staff to control the de?ciency, and earth moving equipment may be necessary for address corrective measures following a ?eld investigation. LRS has a backhoe excavator stored on-site which can be operated by LRS staff. Material inventory for temporary control measures is stored near the warehouse but often varies in quantity. However. sand and rip rap material is generally readily available from outside resources. 5.8.2 Available Resources During an emergency. the ownersloperators may need to bring in outside resources such as heavy equipment. sandbags, pumps, siphons or divers. A listing of the resources including provider names, addresses and telephone numbers available to the owner/operator of the LRS Impoundments can be found in Appendix and was last updated on the date shown on the bottom of the page. 5.9 Coordination of Information Refer to the Notification Flowchart in Appendix when informing responsible parties of an emergency. lnfonnation on weather should be obtained from the National Weather Service (NW8) at or by phone at 317-856-0367. Co-ordination with the NWS is recommended to monitor storms, river stages. and ?ood waves resulting from a failure. The NWS may also be able to supplement warnings being issued using their own communication system. 5.10 Annual Review, Training, and Testing The EAP should be reviewed on an annual basis to ensure that all contact information listed is accurate and that personnel are familiar with the EAP and understand their role in responding to an emergency. Training and exercise plans should be designed and developed by those entities with responsibilities identi?ed in the EAP. EAP action items and procedures should be exercised periodically for all individuals involved in its implementation so that individuals are familiar with their roles and responsibilities. The annual review of and training for the LRS Impoundment?s EAP will occur in winter concurrent with the Grayrocks Reservoir annual training. Based on changes identi?ed in the annual review, copies of updated pages will be provided to all holders of the EAP. A copy of the most current EAP will be kept in the shift SUpervisor's of?ce and weekend duty superintendent's of?ce. internal AECOM Action Plan?Final?ocx 13 Emergency Action Plan At least every ?ve (5) years, the owner/operator of the LRS Impoundments will meet with the Platte County Emergency Management to discuss what changes have been made to the Platte County All Hazards Emergency Response! Operations Plan and to determine what opportunities exist for exercises. Also. the owner/operator of the LRS lmpoundments will review the dam failure (hydraulic shadow) map to identify any signi?cant land use changes in the hazard area. The owner/operator should work with local emergency management to determine what opportunities exist to conduct or participate in impoundment related EAP exercises. 5.11 Alternative Systems of Communication The list below provides information on the forms of communication that are available at the LRS lmpoundments and operating procedures during an emergency event: 0 Phones: primary source of communication during an emergency event. . Email: used for follow up communication. I Plant?wide Emergency Response system: to be used when evacuation of employees is required. 5.12 Public Awareness and Communication Residential areas are located of the LRS lmpoundments. Public awareness measures should be provided to explain the proximity of the impoundment to residences. how peeple will be informed of an emergency situation, and the actions people should take during an emergency. Basin Electric Headquarters is currently responsible for providing informational updates on LRS. LRS staff contact residences on an annual basis to con?rm contact information is current with information provided in the EAP. In the event of an emergency. the Platte County Emergency Management will contact residences and then contact LRS to inform LRS of which property owners were noti?ed and which property owners did not respond. lntemet AECOM Action Plen_Final.Docx 14 Emergency Action Plan Appendix A Figures A.1 A.2 A.3 A.4 A.5 AS Site Location Map Site Vicinity Map Facility Layout Diagram Adjacent Property Owners Map Hydraulic Shadow Map Impoundment Plan and Sections Dam Failure Analysis Summary Tables Intamet Action Plan_Final.Docx AECOM df: ?nk a Overhea :22? g: .2. Powerlines a? - -1. cam-7?32?? Grayrucks Rd NISVH AONESHEWE HENH pajnim?mg. Electrical Substation n. 2 cn o: 3 n: I.ILegend Primary Access Route Secondary Access Roule Dm= SRA 41'171201? lwmd: CR5 4f1'?2017 Scab; AS SHOWN I . 2.. 60429243 .5: ?-221 i2 1.311225?. 512512122" {21221292511552 21.25221??ng [magic Edi. 21.92.72 MTW Eff?? mm m?f 1.11- I 3 ?9111: {k (2:43:51. 1 ?172. 25. 156. Basin Electric Ash Pond Figuresmdjacent Pmpeny Owners Map. Emergency Action Plan Appendix Charts and Tables 8.1 Summary of EAP Responsibilities 8.2 Summary of Owner Responsibilities 8.3 Guidance for Determining the Emergency Level 8.4 Level of Emergency Determination Chart 8.5 Noti?cation Flowcharts 8.6 Available Resources Chart Internet AECOM Action PIan_Flnal.Docx Emergency Action Plan Summary of EAP Responsibilities Entity Responsibilities Verify and assess emergency conditions Notify other participating emergency management agencies Take corrective action at facility Declare termination of emergency at facility Update EAP on at least an annual basis Respond to emergencies at the facility Receive condition status reports from the operator OwnerIOperator Receive condition status reports from owner Notify Public within Wheatland limits Conduct evacuation from inundation areas within town limits. if required Town of Wheatland Police. Fire. and Rescue 4. Render assistance to Platte County, as necessary 5. Render assistance to owner, as necessary Platte County Police. Fire and 1. Receive condition status reports from owner Rescue, and Emergency 2. Notify public within Platte County Services 3. Conduct evacuation from inundation areas in Platte County. if required lntemet AECOM Action Plan_Final.Docx Emergency Action Plan Summary of Owner Responsibilities Entity Responsibilities 24f? Operations 1. Detect incident Command Center 2. Determine emergency level 3. Make calls on noti?cation ?ow chart 4. Coordinate with Operator and Engineering on gate operations and emergency procedures 5. Coordinate with dam on operations 6. Provide regular status reports to senior management On-site Operator 1. Detect/con?rm incident 2. Determine emergency level 3. Make calls on Noti?cation Flowchart 4. Coordinate with Command Center and Engineering on emergency procedures 5. Implement emergency procedures 6. Provide regular status reports to senior management Engineering 1. Support onsite Operator and Operations Command Center on emergency level Manager 2. Make calls on noti?cation ?ow chart 3. Determine emergency operation and construction procedures 4. Coordinate with Operator and Command Center emergency procedures 5. Dispatch engineers and construction crews as necessary 6. Dispatch engineer as technical liaison to County Emergency Operations Center 7. Provide regular status reports to senior management Senior 1. Make calls on Noti?cation Flowchart Management 2. Initiate periodic status report conference calls with site. command center, engineering, and public relations 3. Provide regular status reports to County Emergency Operations Center 4. Coordinate with upper management 5. Coordinate with public relations staff at County and technical liaison at County Emergency Operations Center Public Relations 1. Mobilize to County Of?ces 2 Participate in periodic status report conference calls with site. command center. engineering, and management 3. Provide input to staff on emergency communications 4. Represent utility to media lntemet AECOM Action Plan_FineI.Docx Emergency Action Plan Guidance for Determining the Emergency Level Event Situation Emergency Lever? Embankment Reservoir level is 1 feet below the top of the impoundment Potential Overtopping Failure Water from the reservoir is ?owing over the top of the impoundment Imminent Failure Seepage New seepage areas in or near the impoundment Non-failure New seepage areas with cloudy discharge or increasing ?ow rate Potential Failure Sinkholes Observation of new sinkhole in reservoir area or on embankment Potential Failure Rapidly enlarging sinkhole Imminent Failure Embankment New cracks in the component greater than ?A-inch Non-failure 4' Structural wide without seepage Component . Cracking Cracks In the embankment/structural component wuth seepage Potential Failure Embankment \?sual of the embankment slopelstructural component Non-failure I Ciguggant Sudden or rapidly proceeding slides of the embankment Imminent Movement component Failure Security Veri?ed bomb threat that. if carried out. could result in damage to the Potential Threat impoundment Failure Detonated bomb that has resulted in damage to the impoundment or Imminent appurtenances Failure Sabotage! Unauthorized operation of the impoundment Non-failure an allsm Damage that could adversely impact the functioning of the impoundment Non-failure or appurtenances Modi?cation to the impoundment or appurtenances that could adversely Potential impact the Failure functioning of the impoundment Damage to impoundment or appurtenances that has resulted in seepage Potential ?ow Failure Damage to impoundment or appurtenances that has resulted in Imminent uncontrolled water Failure release Last Updated: April 2017 Internet AECOM Action Plan_FinaI.Docx Emergency Action Plan Level of Emergency Determination Chart Step 1: Event Detection Step 2: Emergency Level Determination Step 3: Noti?cation and Communication Step 4: Expected Actions Step 5: Termination and Follow-up Last Updated. April 2017 Detect Event Assess Situation Determine Imminent Failure Potential Failure Non-Failure High Flow Urgent; Potential Unusual High Water lmpoundment lmpoundment Event: Failure Appears Failure Situation Slowly to Be imminent or Rapidly Developing in Progress Developing I I I I Notify Notify Imminent Failure and Potential Failure Noti?cation Flow Chart Non-Failure and High-Water Noti?cation Flow Chart I I I Save People Save Dam Monitor Corrective Action Evacuate Protective Actions (may Perform include operations to potential lower the evacuation water level warning) I I I Termination and Follow-up AECOM lnternai Action Pian_Final Docit Imm?. I Noll. . Failure Ind Mull-l Pillar! Nam Flaw BAP [MIJDpumr Fllmuf Contact WWII mom-um: mm- Callus! - 4' ?F?lun Lam-n mm 5mm Emmi-qr awn? Phi-11w: - 0 TM EAP In. bun named. hbhul mmiwd. Mn. Wt ?Rural-M ?mull ruldumu NHL-tarnimum "Fm' Pn'nary Him I Smut-d EAP Contributor Hung. - Founlhl Fallun - 1'th IEAPL 0 Th. EAPMWWIG. Pam Mil mummy Emil-119mm? mmiwlm Namc. . to ?mull mm alarm 51- Riv-I PM 3 ?and! I 911 . Wo?tupmlmodolhl?u?lutThoh-? 55"? i? .- arms-u \Hunm rm 111.322.3445 Hun- county MM "up? Funny Plum I. BNSF 0181-! than and Punlnr Plum I: 81 I'm-501? i ?mm mm Mallow lam-yam Win Stall Warming Palm Wyoming Calumet I m?r I But: omen {on Man] or 301-111-1110} nun-1o (cu-1 a sun - I Funny Elm Alum-II 301717-4910 Him: I. Cup-t Council Caul- Buruu at Bushman} Cup. Bank-Inn, om 1 w: Funny. 30?- ?Ma??l mer. I Em Nun-hr 307?23750 Nunr . m? 3' 3'4 II In! "Elli 0011 i Pun-m 307-7774321 I Tr. JMM-nwulh Llama-1mm: Inland Emergency Action Plan Non-Failure and High Water Noti?cation Flow Chart Observer of Incident Event CEO 8. Generat Manager? Name: Primary Phone EAP Coordinator (OwnerIOperator Primary Contact Name: Primary Phone Alternate Phone #1 Alternate Contact Name: Primary Phone Alternate Phone BEPC Security (at Least 10 rin 5 Primary Phone Notes . Call Sequence Call EAP Coordinator if 911 is noti?ed by non-utility observer . Platte County Emergency Management? Primary Phone 307-322-1356 Alternate Phone 911 Wheatland Volunteer Fire Primary Phone 307-322-3445 Suggested EAP Coordinator Message 0 This is incident level. a The situation is being monitored to determine if any evacuation warnings are necessary. - We will keep you apprised of the situation. The best telephone number to reach me during this event is