PURPOSE AND BASIC EAP DATA - ose.state.nm.us EAP Model for Da… · Web viewThe template is provided in Microsoft Word format and some notes ... If piping , increased seepage

MODEL DAM EMERGENCY ACTION PLAN

NEW MEXICO OFFICE OF THE STATE ENGINEER DAM SAFETY BUREAU

May 27, 2016

The Office of the State Engineer (OSE) rules and regulations for dams requires each owner of a jurisdictional dam classified as Significant or High Hazard Potential to prepare an Emergency Action Plan (EAP) (19.25.12.18 New Mexico Administrative Code). These plans must be prepared, maintained, and exercised for immediate defensive action to prevent or minimize property damage, injury, or loss of life due to an emergency-flooding situation.

The Model Dam EAP is provided to assist the Dam Owner in preparing an EAP that complies with State requirements. The owner is responsible for ensuring that the EAP is suitable and that it meets the needs of the community. The format has been reviewed by the State Emergency Operations Center but may require further modification in the emergency response areas to comply with the needs of the Local (city or county) Emergency Management Official. The Dam Owner and the Local Emergency Official must assess whether the model format is sufficient for the site-specific conditions associated with the dam or whether additional information must be incorporated to prepare an appropriate EAP. Alternate formats require documentation indicating that the change is required by the Local Emergency Official. The OSE website provided below contains checklists for the EAP Preparer and the Professional Engineer to document coordination with the Local Emergency Official. The coordination checklists must accompany an EAP submitted to the OSE for review and acceptance. The Model Dam EAP is available for download at this OSE website:

http://www.ose.state.nm.us/DS/dsReferencesOwner.php

Dam owners are encouraged to review the OSE paper “Emergency Action Plans for Dams” that is also available on the above website and to contact the dam safety bureau if they have questions. The OSE paper gives additional guidance for each section of the EAP. The dam breach analysis report must be submitted to the OSE for review and approval prior to submitting the EAP to the Local Emergency Official to review and approve. The evacuation map should not be prepared and submitted to the Local Emergency Official until the OSE has approved the inundation maps from the dam breach analysis report.

It is the responsibility of the Dam Owner to update the EAP with correct contact information. The Dam Owner must also coordinate with local emergency officials to periodically exercise the EAP so that it may be effectively implemented if an emergency situation occurs at the dam. The local emergency official may choose to organize one exercise to address several dams in their jurisdiction.

The EAP must be submitted in a 3-ring binder with dividers and tabs to allow for periodic updates. Areas of the EAP model that are shaded in yellow are brought to the attention of the EAP Preparer and are intended to be customized or completed. The yellow shading is then removed prior to submittal. In some cases a clarifying note is identified with yellow shading and those should also be removed when indicated. The template is provided in Microsoft Word format and some notes on word processing for the document are included below.

PLEASE DO NOT INCLUDE THIS PAGE WITH THE FINAL EMERGENCY ACTION PLAN

http://www.ose.state.nm.us/DS/dsReferencesOwner.php

If there are any questions regarding preparation of an EAP for a specific dam or suggested revisions to this model, please contact the OSE Dam Safety Bureau at (505) 383-4134 or (505) 827-6122.

WORD PROCESSING NOTES

Removing the SAMPLE watermark:

Click the Page Layout Tab, then the Watermark button, and finally Remove Watermark

Removing the Yellow highlight:

After the preparer has modified the text that is highlighted in yellow to include information for their dam the yellow highlight is to be removed. The highlight feature is controlled under Home-Font tabs in the MS Word ribbon through use of the Text Highlight Color button. To remove the highlight the editor selects the text with the mouse while holding down the left button and releasing the button at the end of the text. The editor then picks the selects No Color option from the drop-down menu found in the Text Highlight Color button.

Modifying the Header to change the Revision date:

The document has separate section breaks that are used to allow for place holders for the document tabs. The headers for the document must be changed for each document section. Click in the document near the revision date and the header portion of the page should be available for edit. (The other portions of the page should appear to be screened back). Edit the revision date and click elsewhere in the document to return to editing. The editor can scroll down through the document to find other headers that need to be updated.

Modifying the Footer to Change the dam name and County name:

The document has separate section breaks that are used to allow for place holders for the document tabs. The footers for the document must be changed individually within each document section. Click in the document near the dam name and county name at the bottom of the page and the footer portion of the page should be available for edit. (The other portions of the page should appear to be screened back). Edit the dam name and county name and click elsewhere in the document to return to editing. The editor will have to check successive pages within the document and repeat the revision.

Updating page numbers in the Table of Contents:

The Table of Contents (TOC) on page vi can be updated automatically if pages are added or removed to the document. Select (click on) the TOC. The table should highlight in a gray color. At the top of the TOC a box appears that indicates Update Table… Click on Update Table… and select the button labeled Update Page Numbers Only, then click OK.

Page numbers in the TOC for the Appendices A and B must be updated manually.

PLEASE DO NOT INCLUDE THIS PAGE WITH THE FINAL EMERGENCY ACTION PLAN

For Official Use Only Revision No. ___ xx/xx/20xx

EMERGENCY ACTION PLAN (EAP)

(Example maps shown –remove this note)

Copy ____ of _____

ROCK CREEK DAMOSE File No. D-XXX

DeBaca County, New Mexico

Rock Creek Irrigation District

EAP CERTIFICATIONS

DAM OWNER’S CERTIFICATION

[Use the following certification if owner is an individual and not a corporation or political subdivision of the state, then delete this note]

I, Joe Black, being first duly sworn, upon my oath, state that I have read and examined the accompanying Emergency Action Plan and know the contents and representations therein for Rock Creek Dam and all that is shown herein is done with my free consent and in accordance with my wishes and state that the same are true and correct to the best of my knowledge and belief.

______________________________________Joe Black Date

Subscribed and sworn to before me this _____ day of __________________ , 20__.

_______________________________Notary public

My commission expires ____________ (SEAL)

[Use the following certification if owner is a corporation or political subdivision of the state and not an individual owner, then delete this note]

I, Joe Black , being first duly sworn, upon my oath, state that I am the Chairman of the Rock Creek Irrigation District, a political subdivision duly organized under the laws of the state of New Mexico, that the accompanying Emergency Action Plan , for Rock Creek Dam were made under authority of the board of directors of said political subdivision and that, in their behalf, I have read and examined the statements and representations and all that is shown herein is done with their free consent and in accordance with their wishes and state that the same are true and correct to the best of my knowledge and belief.

_____________________________________Joe Black, Chairman Date

Subscribed and sworn to before me this _____ day of __________________ , 20__._______________________________Notary public

My commission expires ____________ (SEAL)

Page i

ENGINEER’S CERTIFICATIONI, Mike Brown , hereby certify that I am a professional engineer licensed in the state of New Mexico, qualified in civil engineering; that the accompanying Emergency Level determinations (step 1), Expected Emergency Actions (step 3), inundation maps and metadata documentation of the Emergency Action Plan for Rock Creek Dam were prepared by me or under my supervision; that the accompanying Emergency Level determinations (step 1), Expected Emergency Actions (step 3), inundation maps and metadata documentation of the Emergency Action Plan are in compliance with the Dam Design, Construction and Dam Safety Regulations (19.25.12 NMAC) and that the same are true and correct to the best of my knowledge and belief.

________________________________, License number: 1000000 , (SEAL) Mike Brown

Date: ______________

Page ii

__(Local Entity)___________ EMERGENCY OFFICIAL CERTIFICATION

I hereby certify that the accompanying Emergency Action Plan for Rock Creek Dam has been duly examined by me and accepted for filing on the _____ day of _____________________, 20___.

_______________________________ (Signature)

_______________________________ (Print Official’s Name)

_______________________________ (Print Official’s Title)

Page iii

NM DEPARTMENT OF HOMELAND SECURITY CERTIFICATION

I hereby certify that the accompanying Emergency Action Plan for Rock Creek Dam has been duly examined by me and accepted for filing on the _____ day of _____________________, 20__.

_______________________________ (Signature)

_______________________________ (Print Official’s Name)

_______________________________ (Print Official’s Title)

Page iv

STATE ENGINEER’S CERTIFICATION

I hereby certify that the accompanying Emergency Action Plan for Rock Creek Dam has been duly examined by me and accepted for filing on the _____ day of ___________________, 20____.

__________________________________ State Engineer

Page v

Insert Side Tab Here“”

”Table of Contents”

(and recycle this page)


TABLE OF CONTENTS

PURPOSE AND BASIC EAP DATA.................................................................................................................1

RECORD OF REVISIONS AND UPDATES........................................................................................................3

RECORD OF EAP EXERCISES........................................................................................................................3

EAP RESPONSE PROCESS OVERVIEW..........................................................................................................4

ROLES AND RESPONSIBILITIES....................................................................................................................5

FOUR-STEP EAP RESPONSE PROCESS..........................................................................................................7STEP 1 - INCIDENT DETECTION, EVALUATION, AND EMERGENCY LEVEL DETERMINATION...........................7

GUIDANCE FOR DETERMINING THE EMERGENCY LEVEL............................................................................9EXAMPLES OF EMERGENCY SITUATIONS..................................................................................................10

STEP 2 – NOTIFICATION AND COMMUNICATION.........................................................................................13NOTIFICATION FLOW CHARTS:.................................................................................................................13OTHER EMERGENCY SERVICES CONTACTS...............................................................................................20

STEP 3 – EXPECTED EMERGENCY ACTIONS..................................................................................................21NON-FAILURE EMERGENCY LEVEL: NON-EMERGENCY, UNUSUAL EVENT; SLOWLY DEVELOPING:..........21POTENTIAL FAILURE EMERGENCY LEVEL: POTENTIAL DAM FAILURE SITUATION; RAPIDLY DEVLOPING: 22IMMINENT FAILURE EMERGENCY LEVEL: URGENT; DAM FAILURE IS IMMINENT OR IN PROGRESS:.......27

STEP 4 – TERMINATION AND FOLLOW UP.....................................................................................................28

EAP REVIEW, REVISION AND EXERCISE.....................................................................................................29

RECORD OF HOLDERS OF CONTROL COPIES OF THIS EAP..........................................................................30

APPENDICES: FORMS, GLOSSARY, MAPS, AND SUPPORTING DATA...........................................................32

APPENDIX A.............................................................................................................................................32APPENDIX A-1 CONTACT CHECKLIST.....................................................................................................................33APPENDIX A-2 UNUSUAL OR EMERGENCY EVENT LOG.............................................................................................34APPENDIX A-3 DAM EMERGENCY SITUATION REPORT.............................................................................................35APPENDIX A-4 OTHER FORMS............................................................................................................................36APPENDIX A-5 GLOSSARY OF TERMS....................................................................................................................37

APPENDIX B.............................................................................................................................................41APPENDIX B-1 RESOURCES AVAILABLE..................................................................................................................42APPENDIX B-2 LOCATION AND VICINITY MAPS.......................................................................................................43APPENDIX B-3: EVACUATION MAP.................................................................................................................44APPENDIX B-4 RESIDENTS/BUSINESSES/HIGHWAYS AT RISK.....................................................................................45APPENDIX B-5 INUNDATION MAP.......................................................................................................................46APPENDIX B-6 METADATA DOCUMENTATION FOR EAP MAPS..................................................................................47APPENDIX B-7 PLAN VIEW OF DAM.....................................................................................................................48APPENDIX B-8 PROFILE OF DAM ALONG OUTLET CONDUIT......................................................................................49APPENDIX B-9 RESERVOIR ELEVATION-AREA-VOLUME AND OUTLET AND SPILLWAY CAPACITY AND CUMULATIVE RESERVOIR DRAWDOWN TIME TABLE....................................................................................................................50

Rock Creek Dam, DeBaca County Page vi


PURPOSE AND BASIC EAP DATAPURPOSE:

The purpose of this EAP is to reduce the risk of human life loss and injury and to minimize property damage during an unusual or emergency event at Rock Creek Dam. This EAP defines responsibilities and provides procedures designed to identify unusual and unlikely conditions that may endanger the dam in time to take mitigating action and to notify emergency management authorities of possible, impending, or actual failure of the dam. This plan may also be used to provide notification when flood releases can create major flooding.

POTENTIAL IMPACTED AREA:

See “Evacuation Map” Tab (Appendix B-3) and “People at Risk” Tab (Appendix B-4) 6 houses:

o 4 on the south side of the Sierra Vista subdivision in south east Rock Cityo 2 outside city limits:

1 on south side of Rock Creek, south of Rock City 1 on east side of Highway 44 approx. 1 mile south of Rock City

3 businesses on east side of Highway 44 south of Rock City:o Larry’s Music Shop, Moe’s Carwash and Josie’s Coffee Shop

3 Highways:o Interstate 40 and NM State Roads 44 & 66

DAM DESCRIPTION:

Dam Owner: Rock Creek Irrigation District Height: 55 feetMajor Property Owner: Length: 1800 feet Built: 1962 Storage: 560 acre-feet Latitude: _________ Longitude:____________ Drainage Area: 9.5 square milesHazard Classification: HighState Identification: D-999

See detailed design data in B-7, B-8 and B-9 of “Appendix B” Tab.

DIRECTIONS TO DAM:

(See Location and Vicinity Map in B-2 of Appendix B)

Rock Creek Dam can be accessed by traveling south 1.2 miles on NM Highway 44 from the Interstate 40 interchange south of Rock City; turn right (west) on a gated dirt road that goes directly to the left abutment of the dam. Keys for the lock on the gate are available from the Irrigation District Manager at 523 Second Street, Rock City, NM. Note that a portion of this road is within the dam break floodplain and the valley below the dam may be flooded.

Response during adverse weather or high release flows from the reservoir: (Indicate modifications to access the dam or to the EAP that are required (if any) during adverse weather or in cases where the outlet works or outlet works and spillway are activated. Also indicate any

Rock Creek Dam, DeBaca County Page 1


required modifications for access during periods of darkness or modifications required for weekends and holidays).

If the dam cannot be accessed via the primary route, then an alternate route to the dam is available approximately 0.5 miles south of Rock Creek on Highway 44; turn right on a ungated dirt road that goes to the right abutment of the dam. Note that Highway 44 may be inundated or the bridge may be damaged so access to this alternate route may have to be accessed from Highway 44 south of the dam.



RECORD OF REVISIONS AND UPDATES

Revision Number

Date Revisions Made By Whom

RECORD OF EAP EXERCISESExercise

TypeDate Comments By Whom


Insert Side Tab Here“EAP Overview”



EAP RESPONSE PROCESS OVERVIEW


ASSESS SITUATIONDETERMINE EMERGENCY LEVEL

NON-FAILURE EMERGENCY

LEVELUnusual Event;

Slowly Developing

POTENTIAL FAILURE

EMERGENCY LEVEL

Potential Dam Failure Situation;

Rapidly Developing

IMMINENT FAILURE

EMERGENCY LEVELUrgent;

Dam Failure is Imminent or in

Progress

NOTIFYPotential Failure

ContactLists

NOTIFYImminent

Failure ContactLists

NOTIFY

Non-failureContact Lists

SAVE DAM

Protective Actions

SAVE PEOPLE

Evacuate

TERMINATION & FOLLOW-UP

MONITOR

Corrective Action if Needed

STEP 2:Notification andCommunication

STEP 3:Expected

Emergency Actions

STEP 4:Termination

andFollow-up

DETECT EVENT

STEP 1:Event Detection, Evaluation, and

Emergency Level Determination


ROLES AND RESPONSIBILITIESDAM OWNER REPRESENTATIVE

Preparedness—prior to a dam incident: Review and update the EAP annually, coordinate the EAP exercises and provide copies of

the revised EAP to all record copy holders of the EAP. Review and understand actions that could be taken to save the dam or moderate failure

during an incident (see “Expected Actions” Tab—Page X).

During EAP Response (see page x):

EAP Response Step 1 – Detection, Evaluation, Emergency Level Determination: Responsible for monitoring dam and identifying potential problem As soon as an emergency event is observed or reported, immediately determine the

emergency level (see “Emergency Levels” Tab). Emergency levels are defined on Page X.o Non-failure Emergency Level: Unusual event, slowly developing or higher than normal

reservoir release or spillway flow anticipatedo Potential Failure Emergency Level: Potential dam failure situation, rapidly developingo Imminent Failure Emergency Level: Dam failure is imminent or in progress

EAP Response Step 2 -- Notification and Communication: Immediately notify the personnel in the order shown on the notification flow chart for the

appropriate level (see “Notification Charts” Tab).

EAP Response Step 3 – Expected Emergency Actions: Implement expected emergency actions to prevent the dam from failing (see “Expected

Actions” Tab). Emergency Remedial Actions not identified in Step 3 require verbal approval from Office of the State Engineer Dam Safety Bureau if time permits.

Provide updates of the situation to the Local Emergency Official to assist them in making timely and accurate decisions regarding warnings and evacuations.

EAP Response Step 4 – Termination and Follow up: (see page x): Coordinate termination and follow up activities with the OSE Dam Safety Bureau and the

local Emergency Official.

LOCAL EMERGENCY OFFICIAL

Preparedness—prior to a dam incident: Participate in annual review and update and periodic exercises of the EAP

During EAP Response Maintain communication with media When a Non-failure Emergency Level occurs, review the EAP and respond in accordance

with local emergency response plan. In the case of a higher than normal reservoir release that could cause downstream flooding it may be necessary to prepare emergency management personnel for possible evacuations.

When a Potential Failure Emergency Level situation occurs: Prepare emergency management personnel for possible evacuations, in accordance with local emergency response plan, that may be needed if an Imminent Failure Emergency Level situation occurs

When an Imminent Failure Emergency Level situation occurs:



o Alert the general public of the emergencyo Immediately close roads and evacuate people located within the evacuation area (see

“Evacuation Map” Tab)

INCIDENT COMMANDER -- During EAP Response When a Potential Failure Emergency Level situation occurs: Prepare local law enforcement

personnel for possible evacuations that may be needed if an Imminent Failure Emergency Level situation occurs

When an Imminent Failure Emergency Level situation occurs: o Initiate warnings and order evacuation of people at risk downstream of the dam o Notify local law enforcement to carry out the evacuation of people and close roads

within the evacuation area (see “Evacuation Map” Tab)o Decide when to terminate the emergency

DAM OWNER’S ENGINEER – During EAP Response Advise dam owner on emergency level determination if time permits Advise dam owner on remedial actions to take if Non-Failure Emergency Level or Potential

Failure Emergency Level event occurs Advise Office of the State Engineer Dam Safety Bureau of current condition and obtain

verbal approval of proposed remedial action if time permits

OFFICE OF THE STATE ENGINEER – DAM SAFETY BUREAU Approve remedial actions to take if Non-Failure Emergency Level event occurs and if time

permits Approve unanticipated remedial actions to take if Potential Failure Emergency Level event

occurs and if time permits Advise New Mexico Emergency Operations Center on status at dam and participate in

response as needed.



FOUR-STEP EAP RESPONSE PROCESS

STEP 1 - INCIDENT DETECTION, EVALUATION, AND EMERGENCY LEVEL DETERMINATION

INCIDENT DETECTIONThis task describes the detection of an unusual or emergency event and provides information to assist the dam owner in determining the appropriate emergency level for the event.

Unusual or emergency events may be detected by:

Observations at or near the dam by the dam owner, government personnel (local, state, or federal), visitors to the dam, or the public.

Evaluation of instrumentation data. Earthquakes felt or reported in the vicinity of the dam. Forewarning of conditions, which may cause an unusual event or emergency event at the

dam. For example, a severe weather or flash flood forecast.

See the information below and the “Guidance for Determining the Emergency Level” table (Page 9) for assistance in evaluating specific events to determine if they are unusual or potential emergency situations.

EVALUATION AND EMERGENCY LEVEL DETERMINATIONAfter an unusual or emergency event is detected or reported, the Irrigation District Manager or the Manager’s alternate is responsible for classifying the event into one of the following three emergency levels:

Non-Failure Emergency Level; Non-emergency, unusual event, slowly developing or a water release from the dam that could cause downstream flooding:

This situation is not normal, but has not yet threatened the operation or structural integrity of the dam, but possibly could if it continues to develop. Owner’s Engineer shall be contacted to investigate the situation and recommend actions to be taken. Office of the State Engineer Dam Safety Bureau shall be contacted and advised of the situation. The Dam Owner shall obtain Office of the State Engineer Dam Safety Bureau approval of any action to be taken that is not identified in Step 3, Expected Emergency Actions. The condition of the dam must be closely monitored, especially during storm events, to detect any development of a potential or imminent dam failure situation. The Local Emergency Official must be informed if it is determined that the conditions may possibly develop into a worse condition that may require emergency actions.

In the event that the owner expects a higher than normal release of water or expects the auxiliary spillway to flow without compromising the dam--he or she must notify officials downstream to prepare for possible flooding. This may require emergency services to be on alert or to initiate evacuations and road closures if areas downstream could be flooded and people near the channel could be endangered.

Potential Failure Emergency Level; Potential dam failure situation, rapidly developing:

This situation may eventually lead to dam failure and flash flooding downstream, but there is not an immediate threat of dam failure. The Local Emergency Official shall be notified of this emergency



situation and placed on alert. The dam owner must closely monitor the condition of the dam and periodically report the status of the situation to the Local Emergency Official. If the dam condition worsens and failure becomes imminent, the Local Emergency Official must be notified immediately of the change in the emergency level to evacuate the people at risk downstream.

The dam owner must contact their engineer to evaluate the situation and recommend remedial actions to prevent failure of the dam. The dam owner must obtain Office of the State Engineer Dam Safety Bureau’s verbal approval of any recommended action that is not identified in Step 3, Expected Emergency Actions if time permits, and must initiate remedial repairs (local resources that may be available – see B-1 in Appendix B). Time available to employ remedial actions may be hours or days so pre-planning is important.

Imminent Failure Emergency Level; Urgent - Dam failure is imminent or in progress:

This is an extremely urgent situation when a dam failure is occurring or obviously is just about to occur and cannot be prevented. Flash flooding will occur downstream of the dam. This situation is also applicable when additional warning time is needed to alert and evacuate the public even though dam failure may still be prevented. The dam owner must immediately contact the Local Emergency Official so emergency services can begin evacuations of all at-risk people and close roads as needed (see “Evacuation Map” Tab).

See following pages for guidance in determining the proper emergency level for various situations.


Insert Top Tab Here

“Emergency Levels”(and recycle this page)


GUIDANCE FOR DETERMINING THE EMERGENCY LEVEL

Event Situation Emergency Level*

Earth Spillway Flow

Reservoir water surface elevation at spillway crest or spillway is flowing with no active erosion Non-failure

Spillway flowing with active gully erosion. Potential failureOptional: Reservoir water surface elevation is X ft. below the spillway crest and water level continues to rise, flooding people downstream is anticipated Potential failure

Spillway flowing with an advancing headcut that is threatening the control section Imminent failure

Concrete Lined Spillway Flow

Spillway flow exceeds historic discharge Non-failureSpillway flow is causing damage to the spillway or overtopping spillway retaining walls Potential failure

Spillway is failing Imminent failure

Embankment Overtopping

Reservoir level is X ft. below the top of the dam and is continuing to rise. Potential failureWater from the reservoir is flowing over the top (crest) of the dam Imminent failure

SeepageNew seepage areas in or near the dam with clear seepage flow. Non-failureNew seepage areas with cloudy discharge or increasing rate of flow Potential failureSeepage with cloudy discharge greater than XXX Imminent failure

Sinkhole Observation of new sinkhole in the reservoir area or on the embankment Potential failureRapidly enlarging sinkhole Imminent failure

Embankment Cracking

New cracks in the embankment without seepage Non-failure

Cracks in the embankment with seepage Potential failure

Embankment Movement

Visual movement/slippage of the embankment slope PotentialSudden or rapidly proceeding slide of the embankment slopes Imminent failure

Instruments Instrumentation readings beyond predetermined values Non-failure

Mechanical

Damaged or broken outlet valve with no immediate impacts to the functioning of the dam X

Damaged or broken outlet valve that resulted in an uncontrolled release of water which may cause flooding X

Damaged or broken outlet valve that will result in an uncontrolled release and will flood people downstream X

EarthquakeMeasurable earthquake reported or felt in the region of the dam Non-failureEarthquake resulting in visible damage to the dam or appurtenances Potential failureEarthquake resulting in uncontrolled release of water from the dam Imminent failure

Security Threat

Verified bomb threat that, if carried out, could result in damage to the dam Potential failureDetonated bomb that has resulted in damage to the dam or appurtenances Imminent failure

Sabotage / Vandalism

Damage to dam or appurtenances with no impacts to the functioning of the dam Non-failureDamage to dam or appurtenances that has resulted in seepage flow Potential failureDamage to dam or appurtenances that has resulted in uncontrolled water release Imminent failure

Non-Failure Emergency Level: Non-emergency, unusual event, slowly developingPotential Failure Emergency Level: Potential dam failure situation, rapidly developingImminent Failure Emergency Level: Urgent, dam failure is imminent or in progressEstimated time needed by Local Responders to notify occupants closest to the dam is X minutesEstimated time needed by Local Responders to evacuate the closest occupants is X minutes

*{Remove this note when EAP is completed. Emergency Level guidance listed in this table is suggested by FEMA P-64 Emergency Action Planning for Dams, July 2013. Owners must consult with their engineer to determine if these thresholds are appropriate for their dam, or if they are applicable to their dam, or if other items need to be added.}



EXAMPLES OF EMERGENCY SITUATIONS

The following are examples of conditions that constitute an emergency situation at the dam. Adverse or unusual conditions that can cause the failure of a dam are typically related to aging or design and construction oversights. Extreme weather events that exceed the original design conditions can cause significant flow through the spillway or overtopping of the embankment. However, accidental or intentional damage to the dam may also result in emergency conditions. The conditions have been grouped to identify the most likely emergency level condition and are provided as guidance only. Not all emergency conditions may be listed and the dam owner is urged to use conservative judgment in determining whether a specific condition should be defined as an emergency situation at the dam.

(Use a note like this if defects are known to exist, otherwise delete this note): Pre-existing Condition on this Dam: There has been a small seepage area near the downstream toe on the north side of the outlet conduit. This was first noticed in 1985 but has not changed since that time.

EARTH SPILLWAY FLOWS (Remove this for dams with concrete spillways)

Non-failure Emergency Level – Spillway Flow without Structural CompromiseFlow through the earth spillway that may cause flooding that could threaten people, homes, and/or roads downstream from the dam. While not a dam failure emergency if the spillway and the dam remain intact, the dam owner must inform the Emergency Manager in downstream areas if people, homes and/or roads downstream are threatened.

Potential Failure Emergency Level - Potential Dam Failure Situation; Rapidly DevelopingErosion or head cutting of the spillway is occurring, but the rate does not appear to threaten a breach of the spillway crest that would result in an uncontrolled release of the reservoir. If spillway flows may cause flooding that could threaten people, homes and/or roads downstream the dam owner must inform the Emergency Manager in downstream areas.

Imminent Failure Emergency Level – Urgent; Dam Failure is Imminent or in ProgressSignificant erosion or head cutting of the spillway is occurring at a rapid rate and a breach of the control section appears to be imminent.

CONCRETE LINED SPILLWAY FLOWS (Remove this for dams with earth spillways)

Non-failure Emergency Level – Higher Than Normal Releases or Spillway Flow without Structural Compromise

Flow through the spillway that may cause flooding that could threaten people, homes, and/or roads downstream from the dam. While not a dam failure emergency, the dam owner must inform the Emergency Manager in downstream areas if people, homes and/or roads downstream are threatened.

Potential Failure Emergency Level - Potential Dam Failure Situation; Rapidly DevelopingFlow through the spillway is causing damage to the spillway or overtopping the spillway retaining walls. If spillway flows cause flooding that could threaten people, homes and/or roads downstream the dam owner must inform the Emergency Manager in downstream areas.

Imminent Failure Emergency Level – Urgent; Dam Failure is Imminent or in ProgressFlow has damaged the spillway and failure is progressing at a rapid rate. A breach of the spillway is imminent or in progress.



EMBANKMENT OVERTOPPING

Potential Failure Emergency Level - Potential Dam Failure Situation; Rapidly Developing1. The reservoir level is within X ft. of the top of dam and is projected to continue to rise.

Imminent Failure Emergency Level – Urgent; Dam Failure is Imminent or in Progress1. The reservoir level has exceeded the top of the dam. Flow is occurring over the embankment.

SEEPAGE AND SINKHOLES

Potential Failure Emergency Level - Potential Dam Failure Situation; Rapidly Developing1. Cloudy seepage or soil deposits are observed at seepage exit points or from internal drain outlet

pipes.2. New or increased areas of wet or muddy soils are present on the downstream slope, abutment,

and/or foundation of the dam, and there is an easily detectable and unusual increase in volume of downstream seepage.

3. Significant new or enlarging sinkhole(s) or settlement of the dam is observed.4. Reservoir level is falling without apparent cause.5. (Use a note like this if defects are known to exist, otherwise delete this note): The following

known dam defects are or will soon be inundated by a rise in the reservoir: Sinkhole(s) located on the upstream slope, crest, abutment, and/or foundation of the dam;

or Transverse cracks extending through the dam, abutments, or foundation.

Imminent Failure Emergency Level – Urgent; Dam Failure is Imminent or in Progress1. Rapidly increasing cloudy seepage or soil deposits at seepage exit points to the extent that

failure appears imminent or is in progress.2. Rapid increase in volume of downstream seepage to the extent that failure appears imminent or

is in progress.3. Water flowing out of holes in the downstream slope, abutment, and/or foundation of the dam to

the extent that failure appears imminent or is in progress.4. Whirlpools or other evidence exists indicating that the reservoir is draining rapidly through the

dam or foundation.5. Rapidly enlarging sinkhole(s) are forming on the dam or abutments to the extent that failure

appears imminent or is in progress.6. Rapidly increasing flow through crack(s) eroding materials to the extent that failure appears

imminent or is in progress.

EMBANKMENT MOVEMENT AND CRACKING

Potential Failure Emergency Level- Potential Dam Failure Situation; Rapidly Developing1. Settlement of the crest, slopes, abutments and/or foundation of the dam, which may eventually

result in breaching of the dam.2. Significant increase in length, width, or offset of cracks in the crest, slopes, abutments, and/or

foundation of the dam that may eventually result in breaching of the dam.

Imminent Failure Emergency Level – Urgent; Dam Failure is Imminent or in Progress1. Sudden or rapidly proceeding slides, settlement, or cracking of the embankment crest, slopes,

abutments, and/or foundation, and breaching of the dam appears imminent or is in progress.


Insert Side Tab Here

“Communications”(and recycle this page)


STEP 2 – NOTIFICATION AND COMMUNICATION

NOTIFICATION FLOW CHARTS:

After the emergency level has been determined, the people on the following notification flowchart for the appropriate emergency level shall be notified immediately. The Contacts Checklist and Event Log in Appendix A are to be used to document communications and events.

COMMUNICATION:

Non-Failure Emergency Level: Non-emergency, Unusual Event; Slowly Developing:

Contact Owner’s EngineerThe Irrigation District Manager must contact the Owner’s Engineer to assist in evaluation of the situation and to recommend remedial actions to prevent failure of the dam.

Contact OSE Dam Safety BureauThe Irrigation District Manager and the Dam Owner’s Engineer must contact the Office of the State Engineer Dam Safety Bureau. Describe the situation, recommendations by the Engineer and request approval of any action to be taken.

Contact Emergency OfficialIf the conditions may possibly develop into a worse condition that may require emergency actions the following message may be used to help describe the situation to the Local Emergency Official:

“This is _____(Identify yourself; name, position, etc.)

We have an incident under investigation that is considered a non-emergency at this time at Rock Creek Dam that is located 2 miles south of Rock City. We have activated our EAP and we are at a Non-Failure Emergency Level condition.

Our engineer is on site and we are coordinating activities with the Office of the State Engineer Dam Safety Bureau.

[Describe the situation]

We are monitoring the situation in case conditions change to an emergency condition.

I can be contacted at the following number:______________________________

If you cannot reach me, please call the following alternative number:____________________

[State when you plan to contact the Official again]



Potential Failure Emergency Level: Potential Dam Failure Situation; Rapidly Developing:

Contact Owner’s EngineerThe Irrigation District Manager must contact the Owner’s engineer to assist in evaluation of the situation and to recommend remedial actions to prevent failure of the dam.

Contact OSE Dam Safety BureauThe Irrigation District Manager and the Dam Owner’s Engineer must contact the Office of the State Engineer Dam Safety Bureau. If time permits, describe the situation, recommendations by the Engineer and request approval of any action to be taken.

Contact Emergency OfficialThe following message may be used to help describe the emergency situation to the Local Emergency Official:

“This is _____(Identify yourself; name, position, etc.)

We have an emergency condition at Rock Creek Dam that is located 2 miles south of Rock City.

We have activated the Emergency Action Plan for this dam and are currently under Potential Failure Emergency Level


We are implementing predetermined actions to respond to a rapidly developing situation that could result in dam failure.

Please prepare to evacuate the area as shown on the evacuation map in the emergency action plan.

We will advise you as soon as the situation is resolved or if the situation gets worse.



[State when you plan to contact the Official again]



Imminent Failure Emergency Level: Urgent; Dam Failure is Imminent or in Progress:

The Local Emergency Official must be contacted immediately and the area evacuated (see “Evacuation Map” Tab). The following actions must be taken:

1. Call the Local Emergency Official. Be sure to say, "This is an emergency". They will call other authorities and the media and begin the evacuation. The following message may be used to help describe the emergency situation to emergency management personnel:

“This is an emergency. This is _____(Identify yourself; name, position, etc.)

Rock Creek Dam that is located 2 miles south of Rock City is failing and the downstream area must be evacuated immediately. Repeat, Rock Creek Dam is failing; evacuate the area shown on the evacuation map immediately.


We have activated the Emergency Action Plan for this dam and are currently under Imminent Failure Emergency Level.

Reference the evacuation map in your copy of the Emergency Action Plan.



The next status report will be provided in approximately 30 minutes.

2. Do whatever is necessary to bring people in immediate danger to safety (anyone on the dam, directly below the dam or boating on the reservoir).

3. Keep in frequent contact with the Local Emergency Official to keep them up-to-date on the condition of the dam. They will tell you how you can help to handle the emergency.

4. If all means of communication are lost: (1) try to find out why, (2) try to get to another radio or telephone that works, or (3) get someone else to try to reestablish communications. If these means fail, handle the immediate problems as well as you can, and periodically try to reestablish contact with the Local Emergency Official.

The following prescripted message may be used as a guide for the Rock City Emergency Services Personnel to communicate the status of the emergency with the public:

“Attention: This is an emergency message from the____________. Listen carefully. Your life may depend on immediate action.

Rock Creek Dam located 2 miles south of Rock City is failing. Repeat. Rock Creek Dam located 2 miles south of Rock City if failing.

If you live in or near this area, proceed immediately to high ground away from the valley. Do not travel on Highway 44 south of Rock City or return to your home to



recover your possessions. You cannot outrun or drive away from the flood wave. Proceed immediately to high ground away from the valley”.

Repeat Message

Contact OSE Dam Safety Bureau

Contact Owner’s Engineer


Insert Top Tab Here

“Notification Flow Charts”



NON-FAILURE EMERGENCY LEVEL NOTIFICATION

NON-EMERGENCY: UNUSUAL EVENT,SLOWLY DEVELOPING


DAM OWNER

Rock Creek Irrigation District Manager

505-515-1234 (Office)505-515-5678 (Home)505-515-9012 (Cell)

2

Note:1, 2, 3, etc. denotes call sequence

Legend:Calls by Owner

1

See “Emergency Service Contacts” Tab for contact information for back-ups to the persons shown above and other emergency personnel

LOCAL EMERGENCY

OFFICIAL

DeBaca County Official505-555-4321 Office

505-555-8765 Cell

OFFICE OF THE STATE ENGINEER

Dam Safety BureauCharles N. Thompson, PE

505-383-4134 (Office)505-660-3313 (Cell)

or505-476-9635

(NMEOC 24-hour #)

OWNER’S ENGINEER

Brown Engineering

Mike Brown, P.E.

505-555-1234 (Office)505-555-5678 (Home)505-555-9012 (Cell)

32

See “Communications” Tab for prescripted messages

(Remove this note when completing EAP -- The local Emergency Manager may want to modify these charts and sequence of notifications. Modification is acceptable with concurrence from the Emergency Manager.


POTENTIAL FAILURE EMERGENCY LEVEL NOTIFICATIONS

EMERGENCY EVENT: POTENTIAL DAM FAILURE SITUATION, RAPIDLY DEVELOPING


DAM OWNER


505-515-1234 (Office)505-515-5678 (Home)505-515-9012 (Cell)

OWNER’S ENGINEER

Brown Engineering

Mike Brown, P.E.

505-555-1234 (Office)505-555-5678 (Home)505-555-9012 (Cell)

OFFICE OF THE STATE ENGINEER

Dam Safety BureauCharles N. Thompson, PE

505-383-4134 (Office)505-660-3313 (Cell)

or505-476-9635

(NMEOC 24-hour #)

21

Note:1, 2, 3 etc. denotes call sequence

Legend:Calls by Owner Second Level Calls

LOCALEMERGENCY

OFFICIAL

505-555-4321 Office505-555-8765 Cell

3

Local Law Enforcement911

505-555-XXXX

NM Highway PatrolDispatcher

505-555-XXXX911

Other Identified Party

NM EmergencyOperations Center

24-Hour Duty Officer505-476-9635

See “Communications” Tab for prescripted messages

National Weather ServiceName

xxx-xxx-xxxx



IMMINENT FAILURE EMERGENCY LEVEL NOTIFICATIONS

EMERGENCY EVENT: DAM FAILURE IS IMMINENT OR IN PROGRESS


DAM OWNER


505-515-1234 (Office)505-515-5678 (Home)505-515-9012 (Cell)505-515-9012 (Cell)

OFFICE OF THE STATE

ENGINEERDam Safety Bureau

Charles N. Thompson, PE

505-383-4134 (Office)505-660-3313 (Cell)

or505-476-9635

(NMEOC 24-hour #)

OWNER’S ENGINEER

Brown Engineering

Mike Brown, P.E.

505-555-1234 (Office)505-555-5678 (Home)505-555-9012 (Cell)

21

Note:1, 2, 3, etc. denotes call sequenceLegend:Calls by Owner Second Level Calls

LOCAL EMERGENCY

OFFICIAL

505-555-XXXX Office505-555-XXXX Cell

Local Law Enforcement911

505-555-XXXX

NM Highway Patrol Dispatcher

505-555-XXXX911

3

See “Communications” Tab for prescripted public announcement

messages

N.M. EmergencyOperations Center

24-hour Duty Officer505-476-9635


National Weather ServiceName

xxx-xxx-xxxx


“Emergency Services Contacts”



OTHER EMERGENCY SERVICES CONTACTS

Agency / Organization

Principal Contact Address

Office Telephone

No.

Alternate Telephone Numbers

DeBaca County Commissioners

Gloria BrownChair

336 Highway 66Rock City. NM 505-555-3719

DeBaca County Road Department

Max GraySupervisor

973 Ninth StreetRock City, NM 505-555-4496

DeBaca County Conservation

District

John Jordon *District Manager

523 Second St.Rock City, NM 505-555-2309

407-559-6679 (H)

405-665-1176 (C)


District

Mary James *District Secretary

523 Second StRock City, NM 505-555-2309

407-559-2387 (H)

405-472-8731 (C)


District

Mike Blain *Board Chair

523 Second StRock City, NM 505-555-2309

407-559-6699 (H)

405-665-4432 (C)

DeBaca County Sheriff Henry Martin 336 Highway 66

Rock City, NM 505-555-1287

407-559-3377 (H)

407-665-1973 (C)

Landowner of Rock Creek Dam Bryon Babcock R.R. #2

Rock City, NM

407-559-9922 (H)

407-665-4499 (C)

New Mexico Dept. of Transportation

Bill DobsonDistrict Engineer

539 Center Street

Dry Gulch, NM505-555-6622

New Mexico Highway Patrol Richard Barnell 299 First Ave.

Dry Gulch, NM 505-555-8274

Rock City Emergency

Management Coordinator

Jeff Powers 121 Main StreetRock City, NM 505-555-4411

Rock City Fire Department Harry James 336 Maple Street

Rock City, NM505-555-3856

Rock City Police Red Jones 336 Maple StreetRock City, NM 505-555-2299

* Back-up to primary contact


Insert Top Tab Here

“Expected Actions”(and recycle this page)

For Official Use Only

Revision No. ___ xx/xx/20xx

STEP 3 – EXPECTED EMERGENCY ACTIONS

If the Police or Sheriff receives a 911 call regarding observations of an unusual or emergency event at the dam, they must immediately contact the Rock Creek Irrigation District office. After the Rock Creek Irrigation District Manager determines the emergency level, the following actions must be taken. The Dam Owner must contact their engineer for technical consultation. The Dam Owner must contact the Office of the State Engineer Dam Safety Bureau to be made aware of the situation and be advised of any action taken. Emergency remedial actions outside the scope of activities listed below require Office of the State Engineer Dam Safety Bureau approval, if time permits.

NON-FAILURE EMERGENCY LEVEL: NON-EMERGENCY, UNUSUAL EVENT; SLOWLY DEVELOPING:

A. The Rock Creek Irrigation District Manager must inspect the dam. At a minimum, inspect the full length of the upstream slope, crest, downstream toe, and downstream slope. Also check the reservoir area, abutments, and downstream channel for signs of changing conditions. If increased seepage, erosion, cracking or settlement are observed, immediately report the observed conditions to your Engineer and the Office of the State Engineer Dam Safety Bureau; refer to the “Guidance for Determining the Emergency Level” Table (Page 9) for the appropriate event level for the new condition and recommended actions.

B. The Rock Creek Irrigation District Manager must record all contacts that were made on the “Contacts Checklist” Form (see A-1, Appendix A).

C. The Rock Creek Irrigation District Manager must begin to record all information, observations, and actions taken on the “Event Log” Form (see A-2, Appendix A). Note the time of changing conditions. Document the situation with photographs and video if possible and update the Event Log throughout the incident.

D. The Rock Creek Irrigation District Manager must contact their Engineer and request an investigation of the situation and recommended corrective actions.

E. The Rock Creek Irrigation District Manager must contact the Office of the State Engineer Dam Safety Bureau and must advise of the situation, what action is being proposed, and obtain approval.

F. The Rock Creek Irrigation District Manager will advise the Local Emergency Official if it is determined that the condition may possibly develop into an Potential Failure Emergency Level condition.

Rock Creek Dam, DeBaca County

Page 21



POTENTIAL FAILURE EMERGENCY LEVEL: POTENTIAL DAM FAILURE SITUATION; RAPIDLY DEVELOPING:

A. The Rock Creek Irrigation District Manager must contact their Engineer and the Office of the State Engineer Dam Safety Bureau to report the situation and, if time permits, request technical assistance from the Owner’s Engineer to investigate the situation and recommend corrective actions. Office of the State Engineer Dam Safety Bureau’s approval of any emergency remedial action outside the scope of activity listed below is required, if time permits.

B. The Rock Creek Irrigation District Manager must contact the Local Emergency Official to inform him that the emergency action plan has been activated and if current conditions get worse, an emergency situation may require evacuation. Preparations must be made for possible road closures and evacuations.

C. The Rock Creek Irrigation District Manager must provide updates to the Local Emergency Official to assist in making timely decisions concerning the need for warnings, road closures and evacuations.

D. If time permits, the Rock Creek Irrigation District Manager must inspect the dam. At a minimum, inspect the full length of the upstream slope, crest, downstream toe, and downstream slope. Also check the reservoir area, abutments, and downstream channel for signs of changing conditions. If piping, increased seepage, erosion, cracking or settlement are observed, immediately report the observed conditions to their Engineer; refer to the “Guidance for Determining the Emergency Level” Table (Page 9) for the appropriate event level for the new condition and recommended actions.

E. The Rock Creek Irrigation District Manager must record all contacts that were made on the “Contact Checklist” Form (see A-1, Appendix A).

F. The Rock Creek Irrigation District Manager must begin to record all information, observations, and actions taken on the “Event Log” Form (see A-2, Appendix A). Note the time of changing conditions. Document the situation with photographs and video if possible and update the Event Log throughout the incident.

G. If time permits, the emergency remedial actions listed below must be taken as appropriate.

Emergency Remedial Actions and Interventions – Potential Failure Emergency LevelIf time permits, the emergency remedial actions listed in the following table must be considered for Potential Failure Emergency Level conditions. Immediate implementation of these remedial actions may delay, moderate, or prevent the failure of the dam. The remedial actions listed below do not require Office of the State Engineer Dam Safety Bureau approval prior to implementing the action. Several of the listed adverse or unusual conditions may be apparent at the dam at the same time, and will require implementation of several modes of remedial action. Close monitoring of the dam must be maintained to confirm the success of any remedial action taken at the dam. If time permits any remedial action must be developed through consultation with the Owner’s Engineer and the Office of the State Engineer Dam Safety Bureau. See “Resources Available” (see B-1, Appendix B) for sources of equipment and materials to assist with remedial actions.


Page 22


Example Remedial Actions -- Potential Failure Interventions

Condition Description of Condition Action to be TakenHigh Water Level / Large Spillway Release

Reservoir level reaches elevation XXX ft. and is rising at a rate of greater than one foot per hour.

1. Check for signs of erosion from spillway channel, particularly near wing walls. (If applicable—Close or stop diversion (filling) to off-stream reservoir.)

2. Assess cause of increased reservoir stage, especially during fair weather conditions.3. Perform additional tasks as directed by Dam Owner’s Engineer.

4. If condition worsens such that downstream flooding is imminent, upgrade emergency level and notify Emergency Manager for evacuations if necessary.

Embankment Overtopping

Reservoir level has reached the dam crest and water is flowing over the dam.

1. If the water level in the reservoir is no longer rising, place sandbags along low areas of the dam crest to reduce the likelihood of flow concentrating during minor overtopping.

2. Cover the weak areas of the top of the dam and downstream slope with riprap, sandbags or other materials to provide erosion-resistant protection.

Seepage Localized new seepage or boil(s) observed along downstream face / toe of earthen embankment with muddy discharge and increasing but controllable discharge of water.

1. Open outlet gate (if applicable) to lower the reservoir level as rapidly as possible to a level that stops or decreases the seepage to a non-erosive velocity. Pumping may be necessary if the gate is damaged or blocked.

2. If the entrance to the seepage origination point is observable in the reservoir (possible whirlpool) and is safely accessible, attempt to reduce the flow by plugging the entrance with readily available material such as hay bales, bentonite, soil or rock fill, or plastic sheeting. Prevent vehicles and equipment from driving between the seepage exit points and the embankment to avoid potential collapse.

3. Measure and record feature dimensions, approximate flow rate, and relative location to existing surface features. Take photos if camera is available. Document location on a site plan and in inspection report.

4. Place a ring of sand bags around the seepage area with a weir at the top towards the natural drainage path to monitor flow rate. If boil becomes too large to sand bag, place a blanket filter over the area using non-woven filter fabric and pea gravel. Attempt to contain flow in such a manner (without performing any excavations) that flow rates can be measured. Stockpile gravel and sand fill for later use, if necessary.




Condition Description of Condition Action to be Taken5. Inspect the dam and collect piezometer, water level and seepage flow data

daily unless otherwise instructed by the owner’s engineer. Record any changes of conditions. Carefully observe dam for signs of depressions, seepage, sinkholes, cracking or movement.

6. Contact a geotechnical engineer and provide all data collected.

7. Maintain continuous monitoring of feature. Record measured flow rate and any changes of condition, including presence or absence of muddy discharge.

8. Review information collected by field inspection and provide additional instructions / actions as required. Recommend remedial seepage and stability measures.

9. If at any time the condition worsens such that downstream flooding is imminent upgrade emergency level and notify Emergency Manager for evacuations if necessary.

Embankment Deformation

Cracks:New longitudinal (along the embankment) or transverse (across the embankment) cracks more than 6 inches deep or more than 3 inches wide or increasing with time. New concave cracks on or near the embankment crest associated with slope movement.


2. Restrict traffic on dam crest to essential emergency operations only.3. Contact a geotechnical engineer and provide all data collected.4. Place buttress fill (min 3 ft. high, 15 ft. wide) against base of slope

immediately below surface feature and extending 20 ft. beyond visible feature limits (parallel to the embankment). Stock pile additional fill.

5. Place sand bags as necessary around crack area to divert any storm water runoff from flowing into crack(s).

6. Inspect the dam; collect piezometer and water level data twice daily unless otherwise instructed by owner’s engineer; and record any changes of condition. Carefully observe dam for signs of depressions, seepage, sinkholes, cracking or movement.

7. Review information collected by field inspectors and provide additional instructions / actions as required. Consider survey monitoring.

8. If condition worsens such that downstream flooding is imminent, upgrade emergency level and notify Emergency Manager for evacuations if necessary.




Condition Description of Condition Action to be TakenSlides / Erosion:

Deep slide / erosion (greater than 2 feet deep) on the embankment that may also extend beyond the embankment toe but does not encroach onto the embankment crest and appears stable with time.

A slide that encroaches into the embankment crest may require upgrade to an Imminent Failure Emergency Level.


2. Restrict traffic on dam crest to essential emergency operations only.3. Contact a geotechnical engineer and provide all data collected.4. Re-establish embankment fill slope. Place 5 ft. high buttress fill against base

of slope at the slide location that extends at least 15 ft. beyond the furthest downstream limits (perpendicular to the embankment) and extending 20 ft. beyond visible feature limits at either end (parallel to the embankment).

5. Place sand bags as necessary around slide area to divert any storm water runoff from flowing into slide(s).

6. Inspect the dam; collect piezometer and water level data daily unless otherwise instructed by owner’s engineer; and record any changes of condition. Carefully observe dam for signs of depressions, seepage, sinkholes, cracking or movement.

7. Review information collected by field inspectors and provide additional instructions / actions as required. Consider survey monitoring.

8. Make notifications if conditions worsen such that failure is imminent.Sinkholes:

Small depression observed on the embankment or within 50 feet of the embankment toe that is less than 5 feet deep and 30 feet wide or which is increasing with time.

1. Slowly open drain valve(s) to lower reservoir elevation.2. Measure and record feature dimensions, approximate flow rate, and relative

location to existing surface features. Take photos if camera is available. Document location on a site plan and in inspection report.

3. Restrict traffic on dam crest to essential emergency operations only.4. Contact a geotechnical engineer and provide all data collected.5. Backfill the depression with relatively clean earth fill (free of organic

materials) generally even with surrounding grade and slightly mounded (6 to 12 inches higher) in the center in order to shed storm water away from the depression. Stock pile additional fill.

6. Inspect the dam; collect piezometer and water level data daily unless otherwise instructed by owner’s engineer; and record any changes of condition. Carefully observe dam for signs of depressions, seepage, sinkholes, cracking or movement.

7. Review information collected by field inspectors and provide additional instructions / actions as required. Consider remedial construction such as




Condition Description of Condition Action to be Takengrouting.

8. Make notifications if conditions worsen such that failure is imminent.Earthquake An earthquake is felt or reported

in the vicinity of the dam 1. Immediately conduct a general visual inspection of the entire dam.

2. Perform field survey to determine if there has been any settlement and movement of the dam embankment, spillway and outlet works.

3. Lower or drain reservoir if necessary. Gate (Valve) Malfunction or Failure – High Flow Anticipated Downstream

Dam gates / valves damaged structurally (sabotage, debris, etc.) with uncontrolled release of water at a constant volume. Condition appears stable.

1. Close any other gates, if open.2. Install XXX or use other methods to stop or slow down the flow of water.3. Consult a structural / mechanical engineer for evaluation and

recommendations. Consult dam remediation contractor for evaluation and recommendations.

Sabotage and Miscellaneous Other Issues

Criminal action with significant damage to embankment or structures where significant repairs are required and the integrity of the facility is compromised – condition appears stable with time.

1. Contact law enforcement authorities and restrict all access (except emergency responders) to dam. Restrict traffic on dam crest to essential emergency operations only.

2. Assess extent of damage and visually inspect entire dam for additional less obvious damage. Based on inspection results, confirm if extent of damage to various components of the dam warrants revised emergency level and additional notifications.

3. If necessary to lower reservoir level, open drain valve(s).4. Perform additional tasks as directed by the owner’s engineer or designee.5. Make notifications if conditions worsen.




IMMINENT FAILURE EMERGENCY LEVEL: URGENT; DAM FAILURE IS IMMINENT OR IN PROGRESS:

A. The Rock Creek Irrigation District Manager must immediately contact the Local Emergency Official, the Office of the State Engineer Dam Safety Bureau and the Owner’s Engineer.

B. The Rock Creek Irrigation District Manager must do whatever is necessary to bring people in immediate danger to safety. This includes anyone on the dam, directly below the dam, or boating on the reservoir.

C. The Local Emergency Official shall lead the efforts to carry out warnings, road closures and evacuations of people at risk downstream from the dam (see “Evacuation Map” Tab).

D. Emergency Management services personnel shall alert the general public and immediately evacuate at-risk people and close roads, as necessary

E. The Rock Creek Irrigation District Manager must maintain continuous communication and provide the Local Emergency Official with updates of the situation to assist him in making timely decisions concerning warnings and evacuations.

F. The Rock Creek Irrigation District Manager must record all contacts that were made on the “Contact Checklist” Form (see A-1, Appendix A).

G. The Rock Creek Irrigation District Manager must begin to record all information, observations, and actions taken on the “Event Log” Form (see A-2, Appendix A). Note the time of changing conditions and update the Event Log throughout the incident.

H. The Rock Creek Irrigation District Manager must document the situation with photographs and video, if possible.

I. Assure personnel monitoring the dam are following safe procedures. Everyone must stay away from any failing structures and out of the potential breach inundation areas.


Page 27


STEP 4 – TERMINATION and FOLLOW UP

Whenever the EAP has been activated, an emergency level has been declared, all EAP actions have been completed, and the emergency is over, the EAP operations must eventually be terminated and follow-up procedures completed.

Termination Responsibilities

The Local Emergency Official or Incident Command is responsible for terminating EAP operations and relaying this decision to the Rock Creek Irrigation District Manager. It is then the responsibility of each person to notify the same group of contacts that he or she notified during the original event notification process to inform those people that the event has been terminated.

Prior to termination of an Imminent Failure Emergency Level event that has not caused actual dam failure, the Office of the State Engineer Dam Safety Bureau will inspect the dam or require the inspection of the dam to determine whether any damage has occurred to the dam that could potentially result in loss of life, injury, or property damage. Office of the State Engineer Dam Safety Bureau may require the dam owner to implement operating restrictions and other corrective action. If it is determined that conditions do not pose a threat to people or property, the Office of the State Engineer Dam Safety Bureau will advise the Local Emergency Official of the situation at the dam. Termination of the emergency is the decision of the Local Emergency Official or Incident Command.

Follow Up Responsibilities

The “Dam Safety Emergency Situation Report” (see A-3, Appendix A) shall be completed by the Rock Creek Irrigation District Manager to document the emergency event and all actions taken. A copy of the “Dam Safety Emergency Situation Report” shall be mailed to the Office of the State Engineer Dam Safety Bureau and the Local Emergency Official.



“EAP Review, Revision & Exercise”



EAP REVIEW, REVISION AND EXERCISEEAP Annual ReviewThe Rock Creek Irrigation District Manager must review and, if needed, update the Emergency Action Plan at least once each year. The EAP Annual Review will include the following:

Calling all of the contacts on the three notification charts in the EAP to verify that the phone numbers and persons in the specified positions are current. The EAP must be revised if any of the contacts have changed.

Contacting the Local Emergency Official and law enforcement agency to verify the phone numbers and persons in the specified positions. In addition, the Rock Creek Irrigation District Manager must ask if the person contacted knows where the EAP is kept and if he or she understands his or her responsibilities as described in the EAP.

Calling the locally available resources (see B-1, Appendix B) to verify that the phone numbers, addresses, and services are current.

RevisionsThe Rock Creek Irrigation District Manager is responsible for updating the EAP documents. The EAP document held by the Rock Creek Irrigation District is the master document. When revisions occur, the Rock Creek Irrigation District Manager must provide the revised pages and a revised revision log page (Page 3) to all official EAP document holders. The document holders are responsible for revising their outdated copy of the respective document(s) whenever revisions are received. Outdated pages shall be immediately discarded to avoid any confusion with the revisions.

EAP Periodic ExerciseThe Rock Creek Irrigation District must host and facilitate an Exercise or test of the EAP. A table top exercise will be scheduled every 2 to 3 years with a functional exercise scheduled at least once every five years.

The tabletop exercise will typically consist of a meeting arranged and conducted by the dam owner and his/her engineer. Attendance must include the Rock Creek Irrigation District Manager, key irrigation district staff members, owner’s engineer, local emergency official, at least one representative of the local law enforcement agency, and others with key responsibilities listed in the EAP. Other organizations that may be involved with an unusual or emergency event at the dam are encouraged to participate. Meeting participants may visit the dam during the tabletop exercise to familiarize themselves with the dam site before the exercise begins.

The tabletop exercise will begin with the facilitator presenting a scenario of an unusual or emergency event at the dam. The scenario will be developed prior to the exercise. Once the scenario has been presented, the participants will discuss the responses and actions that they would take to address and resolve the scenario. The facilitator will control the discussion, ensuring realistic responses and developing the scenario throughout the exercise. The Rock Creek Irrigation District Manager must complete an Event Log, as they would during an actual event. A functional exercise is similar to a tabletop exercise except the exercise takes place in a stress-induced environment with time constraints to better evaluate the workability of the EAP.

After the tabletop exercise, the four sections of the EAP will be reviewed and discussed. Mutual aid agreements and other emergency procedures can be discussed. The Rock Creek Irrigation District Manager must prepare a written summary of the Periodic Test and revise the EAP as necessary.



RECORD OF HOLDERS OF CONTROL COPIES OF THIS EAP

Copy Number

Organization Include mailing address

Person Receiving a Copy

1

Dam OwnerXXXXXX

Rock City, NM 88008 xxxx

2

Owner’s EngineerXXXXXXXXXXXX, PERock City, NM 88008 xxxx

3 Local Emergency Official xxxx

4 Other Local Stakeholders xxxx

5

Office of the State EngineerDam Safety Bureau

5550 San Antonio Drive NEAlbuquerque, NM 87109

Charles N. Thompson, PE

6

NM State Emergency Operations CenterP.O. Box 27111

Santa Fe, NM 87502(505) 476-9635

xxxx

7

National Weather Service(Local Office - __________________)

____________________________________, NM XXXXX

Lead Forecaster

8

National Weather Service_________________ River Forecast Center

__________________________________, XX XXXXX

xxxx

9

10



CONCURRENCES

(Omit or leave blank and initial above if not required by the Local Emergency Official)By my signature, I acknowledge that I, or my representative, have reviewed this Emergency Action Plan and concur with the tasks and responsibilities assigned herein for my organization.

ORGANIZATION SIGNATURE & DATE

1._________________________________________________________________ _________________Signature Organization Date

Printed Name and Title:________________________________________________________________














Not Required by EM: _____ ___________Initial and date


“Appendix A”(and recycle this page)


APPENDICES: FORMS, GLOSSARY, MAPS, AND SUPPORTING DATA

APPENDIX AA-1 Contact Checklist ____________________________________________________xx

A-2 Unusual or Emergency Event Log Form___________________________________xx

A-3 Dam Emergency Situation Report Form __________________________________xx

A-4 Optional: Other Forms required by Local Emergency Official __________________xx

A-5 Glossary of Terms ___________________________________________________xx



Appendix A-1 Contact Checklist(To be completed by the Dam Owner during an emergency)

(Owner to expand these lists if needed to match notification charts—remove this note)

Date: _________________

Dam Name: Rock Creek Dam County: DeBaca

The following contacts must be made immediately after the emergency level is determined (See Pages 6-9 for guidance to determine the appropriate emergency level for a specific situation). The person making the contacts must initial and record the time of the call and who was notified for each contact made. See the “Notification Charts” Tab for critical contact information and “Emergency Contacts” Tab for contact information for other possible emergency services.

Non-Failure Emergency Level (see Page 13)Person Time ContactedContacted Contacted By

____ Owner’s Engineer ________________ ____________ ______________

____ OSE Dam Safety ________________ ____________ ______________

____ Local Emergency Official ________________ ____________ ______________

Potential Failure Emergency Level (see Page 14)Person Time ContactedContacted Contacted By

____ Owner’s Engineer ________________ ____________ ______________

____ OSE Dam Safety ________________ ____________ ______________


Imminent Failure Emergency Level (see Page 15)Person Time ContactedContacted Contacted By


____ OSE Dam Safety ________________ ____________ ______________

____ Owner’s Engineer ________________ ____________ ______________



Appendix A-2 Unusual or Emergency Event Log(To be completed by the Dam Owner during the emergency)

Dam Name: Rock Creek Dam County: DeBaca

When and how was the event detected? _______________________________________________________________________________

_______________________________________________________________________________

Weather conditions: _______________________________________________________________

_______________________________________________________________________________

General description of the emergency situation: _________________________________________

_______________________________________________________________________________

_______________________________________________________________________________

Emergency level determination: ______________ Made by: ______________________________

Actions and Event Progression

Date Time Action/Event Progression Taken By

Report prepared by: _______________________________________ Date: _______________



Appendix A-3 Dam Emergency Situation Report(To be completed by the Dam Owner following the termination of the emergency)

Dam Name: Rock Creek Dam OSE Dam ID No.: D-999

Dam Location: Rock City, DeBaca County, Rock Creek Report prepared by: ____________________

Date: ________________________________Time:__________________________________________

Weather Conditions:___________________________________________________________________

General Description of Emergency Situation:________________________________________________

___________________________________________________________________________________

___________________________________________________________________________________

Area(s) of Dam Affected:_______________________________________________________________

___________________________________________________________________________________

Extent of Dam Damage:________________________________________________________________

Possible Cause(s):____________________________________________________________________

Effect on Dam’s Operation:_____________________________________________________________

Initial Reservoir Elevation:____________________________ Time:______________________________

Maximum Reservoir Elevation:________________________ Time:______________________________

Final Reservoir Elevation:____________________________ Time:______________________________

Description of area flooded downstream/damages/injuries/loss of life:____________________________

___________________________________________________________________________________

___________________________________________________________________________________

Justification for Termination of the Dam Safety Emergency: ____________________________________

___________________________________________________________________________________

___________________________________________________________________________________

Other Data and Comments:_____________________________________________________________

___________________________________________________________________________________

Observer’s name and telephone number:__________________________________________________



Appendix A-4 Other Forms(Local Emergency Officials may want to include National Incident Management System forms or other forms here. If not, this page can be omitted or initial above if not needed–remove this note).


Not Required by EM: _______ ___________Initial and date


Appendix A-5 Glossary of Terms

ABUTMENT - That part of the valley side against which the dam is constructed. The left and right abutments of dams are defined with the observer looking downstream from the dam.

ACRE-FOOT - A unit of volumetric measure that would cover one acre to a depth of one foot. One acre-foot is equal to 43,560 cubic feet or 325,850 gallons.

APPURTENANT STRUCTURE - Ancillary features of a dam such as inlets, conduits, outlets, spillways, etc.

BERM - A nearly horizontal step (bench) in the sloping face of the dam.

BOIL - A disruption of the soil surface due to water discharging from below the surface. Eroded soil may be deposited in the form of a ring (miniature volcano) around the disruption.

BREACH - An opening through the dam that allows draining of the reservoir. A controlled breach is an intentionally constructed opening. An uncontrolled breach is an unintended failure of the dam.

CONDUIT - A closed channel (round pipe or rectangular box) that conveys water through, around, or under the dam.

CONSEQUENCES - Potential loss of life or property damage downstream of a dam caused by floodwaters released at the dam or by waters released by partial or complete failure of dam. Includes effects of landslides upstream of the dam on property located around the reservoir.

CONTROL SECTION - A usually level segment in the profile of an open channel spillway above which water in the reservoir discharges through the spillway.

CREST OF DAM - See “top of dam”.

CROSS SECTION - A slice through the dam showing elevation vertically and direction of natural water flow horizontally from left to right. Also, a slice through a spillway showing elevation vertically and left and right sides of the spillway looking downstream.

DAM - A man-made barrier constructed across a watercourse or off-channel for the purpose of storage, control or diversion of water.

DAM FAILURE - Catastrophic type of failure characterized by the sudden, rapid, and uncontrolled release of impounded water. There are lesser degrees of failure, but any malfunction or abnormality outside the design assumptions and parameters that adversely affect a dam’s primary function of impounding water is properly considered a failure. Lesser degrees of failure can progressively lead to or heighten the risk of a catastrophic failure. They are, however, normally amendable to corrective action.

DRAIN, TOE or FOUNDATION or BLANKET - A water collection system of sand and gravel and typically pipes along the downstream portion of the dam to collect seepage and convey it to a safe outlet.

DRAINAGE AREA (WATERSHED) - That geographic area on which all rainfall flows into the dam.



DRAWDOWN - The lowering or releasing of the water level in a reservoir over time or the volume lowered or released over a particular period of time.

EMERGENCY - A condition that develops unexpectedly, endangers the structural integrity of the dam and/or downstream human life and property, and requires immediate action to protect life or property.

EMERGENCY ACTION PLAN (EAP) - A formal document identifying potential emergency conditions that may occur at the dam and specifying preplanned actions to minimize potential failure of the dam or minimize failure consequences including loss of life, property damage, and environmental impacts. The EAP describes actions the dam owner will take to moderate or alleviate a problem at the dam, as well as actions the dam owner, in coordination with emergency management authorities, will take to respond to incidents or emergencies related to the dam.

EMERGENCY OPERATIONS CENTER - The location or facility where responsible officials gather during an emergency to direct and coordinate emergency operations, to communicate with other jurisdictions and with field emergency forces, and to formulate protective action decisions and recommendations during an emergency.

EAP EXERCISE - Activity designed to promote prevention, preparedness, and response to incidents and emergencies, and may also be extended to include recovery operations. The exercise also demonstrates the EAP’s effectiveness in an actual situation and demonstrates the readiness levels of key personnel. Periodic exercises result in an improved EAP because lessons learned are incorporated into the updated EAP document. Exercises consist of testing and performing the duties, tasks, or operations identified and defined within the EAP through a simulated event.

EVACUATION MAP - A map showing the geographic area downstream of a dam that should be evacuated if it is threatened to be flooded by a breach of the dam or other large discharge.

FILTER - Layers of sand and gravel in a drain that allow seepage through an embankment to discharge into the drain without eroding the embankment soil.

FREEBOARD - The vertical distance between the spillway crest and the lowest point of the dam crest not including camber.

GATE, SLIDE or SLUICE or REGULATING - An operable, watertight valve to manage the discharge of water from the dam.

GROIN - The area along the intersection of the face of a dam and the abutment.

HAZARD - A situation that creates the potential for adverse consequences such as loss of life, property damage and environmental impacts.

HEIGHT, DAM- The vertical distance between the lowest point along the top of the dam and the lowest point at the downstream toe which usually occurs in the bed of the outlet channel.



HYDROGRAPH, INFLOW or OUTFLOW or BREACH - A graphical representation of either the flow rate or flow depth at a specific point above or below the dam over time for a specific flood occurrence.

INCIDENT - An incident in terms of dam operation includes an impending or actual sudden release of water caused by an accident to, or failure of, a dam or other water retaining structure, or the result of an impending flood condition when the dam is not in danger of failure, or any condition that may affect the safe operation of the dam. The release of water may or may not endanger human life, downstream property and structures, or facility operations.

INCIDENT COMMANDER - The highest predetermined official available at the scene of an emergency situation.

INSTRUMENTATION - An arrangement of devices installed into or near dams that provide measurements to evaluate the structural behavior and other performance parameters of the dam and appurtenant structures.

INUNDATION AREA or MAP - The geographic area downstream of the dam that would be flooded by a breach of the dam or other large discharge. The inundation map is used to develop the evacuation map.

LENGTH OF DAM - The length along the top of the dam between the abutments.

NOTIFICATION - To immediately inform appropriate individuals, organizations, or agencies about a potentially emergency situation so they can initiate appropriate actions.

OPERATOR - The person or position in a company or organization, who is responsible for a dam’s operation and surveillance.

OUTLET WORKS (PRINCIPAL SPILLWAY) - An appurtenant structure that provides for controlled passage of normal water flows through the dam.

PIPING - The progressive destruction of an embankment or embankment foundation by internal erosion of the soil by seepage flows.

PROBABLE MAXIMUM PRECIPITATION (PMP) or FLOOD (PMF) - The theoretically greatest precipitation or resulting flood that is meteorologically feasible for a given duration over a specific drainage area at a particular geographical location.

RESERVOIR - The body of water impounded or potentially impounded by the dam.

RIPRAP - A layer of large rock, precast blocks, bags of cement, or other suitable material, generally placed on an embankment or along a watercourse as protection against wave action, erosion, or scour.

RISK - A measure of the likelihood and severity of an adverse consequence.SEEPAGE - The natural movement of water through the embankment, foundation, or

abutments of the dam.

SLIDE - The disrupted movement of a mass of earth down a slope on the embankment or abutment of the dam.

SPILLWAY (AUXILIARY or EMERGENCY) - The appurtenant structure that provides the controlled conveyance of excess water through, over, or around the dam.

SPILLWAY CAPACITY - The maximum discharge the spillway can safely convey with the reservoir at the maximum design elevation.



SPILLWAY CREST - The lowest level at which reservoir water can flow into the spillway.

TAILWATER - The body of water immediately downstream of the embankment at a specific point in time.

TOE OF DAM - The junction of the downstream face of an embankment with the ground surface

TOP OF DAM (CREST OF DAM) - The elevation of the uppermost surface of an embankment, which can safely impound water behind the dam.



“Appendix B”(and recycle this page)


APPENDICES: FORMS, GLOSSARY, MAPS, AND SUPPORTING DATA

APPENDIX BB-1 Resources Available __________________________________________________xx

B-2 Location and Vicinity Map ______________________________________________xx

B-3 Evacuation Map _____________________________________________________xx

B-4 Residents/Businesses/Highways at Risk __________________________________xx

B-5 Inundation Map ______________________________________________________xx

B-6 Metadata Documentation for EAP Maps __________________________________xx

B-7 Plan View of Dam ____________________________________________________xx

B-8 Profile of Dam along Outlet Conduit ______________________________________xx

B-9 Reservoir Elevation-Area Volume, Outlet and Spillway Capacity Data,

and Cumulative Reservoir Drawdown Time Table for Water Storage Dams _______xx



“Resources”


Appendix B-1 Resources Available

Locally Available Equipment, Labor, and Materials

The Irrigation District has the following resources that can be utilized in the event of an emergency:

two front-end loaders two backhoes one track hoe two graders two dump trucks a sand borrow pit a clay borrow pit

Other locally available resources include:

Heavy Equipment Service& Rental:

Sand & Gravel Supply: Ready-Mix Concrete Supply

Bob’s Dozer Service Kern’s Sand and Gravel Burnett Concrete Co.134 Elm StreetRock City, NM

R.R. 2Rock City, NM

231 Sixth StreetDry Gulch, NM

505-555-XXXX 505-555-XXXX 505-555-XXXX

Tiller Construction Co. Renfro Sand Products405 Second Street

Dry Gulch, NM334 Aston Ave.

Spring Lake, NM505-555-XXXX 505-555-XXXX

Pumping Contractor: Diving Contractor: Sand Bags

A to Z Rental Steve White A to Z Rental569 Seventh Street

Rock City, NM2201 56th StreetJohnstown, NM

5643 Water StreetJohnson, NM

505-555-XXXX 505-555-XXXX 575-555-XXXX

Alternate sources of power:_________________________________________________________



Appendix B-2 Location and Vicinity Maps

(Example maps shown—remove this note)



Insert Top Tab Here

“Evacuation Map”(and recycle this page)


Appendix B-3: EVACUATION MAPEvacuations zones are based solely on flood waters from the watershed

above Rock Creek Dam. Tributary flows below the dam were not considered. Actual flood conditions may differ.



Evacuation Areas Area 1 (13 Residences and 3 Businesses)South of the Santa Fe RailroadEast of Highway 44West of County Road 2100North of County Road 1100Area 2 (No Residences)South of County Road 1300 East of County Road 2300West of Highway 44North of Rock Creek Dam

Major Road Closures to Non-emergency VehiclesHighway 44Southbound lanes at County Road 1300 Northbound lanes at County Road 1100Interstate 40Eastbound lanes at Highway 44 Westbound lanes at County Road 2000

Insert Top Tab Here

“People at Risk”(and recycle this page)


Appendix B-4 Residents/Businesses/Highways at Risk

A major flood caused by a sudden breach of the dam could inundate six homes, three businesses, three highways and the sewer line crossing NM State Road 66. These homes and businesses are marked on the evacuation map. Floodwaters will reach the first home approximately 15 minutes after a dam failure.

House/ Distance Max Water Business Phone Dstrm. Depth above Velocity No.* Resident/Bus. Address No. from dam 1st floor of flow (feet) (feet) (cfs)

1 Fred & Ethel James 10300 132nd St. 555-3425 5,000 5.4 10

B-2 Larry’s Hardware 3214 Chestnut 555-3296 11,400 0.8 6

B-3 Lori’s Boutique 2288 Farm Road 555-3395 11,600 2.6 6

B-4 Bill’s Coffee Shop 1455 Sugar St. 555-8822 11,800 4.8 6 5 Terry & Ann Smith 4812 Chestnut 555-3399 13,600 3.0 3

6 Amos Hill 5500 Apple Road 555-2266 14,000 3.2 3

7 Allen & Ruth Jones 4814 Chestnut 555-3888 13,800 1.2 3

8 Mike & Carol Green 4902 Chestnut 555-0937 14,000 2.4 3

9 Stephanie Evans 4910 Chestnut 555-1111 14,200 0.5 3

NM State Rd 44 2,000 7.9 12

Interstate 40 10,000 3.4 6

NM State Rd 66 11,200 3.4 6

Rock City WWTP State Rd 44 555-6578 11,200 3.4 6

* See Appendix B-3; Evacuation Map



Appendix B-5 Inundation Map


Example Inundation Map Disclaimer Language: Inundation zones are based solely on flood waters from the watershed above Rock Creek Dam. No contributing tributary flow is considered. Methods, procedures and assumptions used to develop the flooded areas, the limits of the flooding shown and flood wave travel times are approximate and should only be used as a guideline for establishing evacuation zones. Actual areas inundated will depend on the actual failure conditions and may differ from areas shown.



Appendix B-6 Metadata Documentation for EAP Maps(Completed by the Professional Engineer responsible for inundation map preparation)

Identification Information

Map Title:Geographic Area Covered:Rules for Use:Last Update Date:

Data Quality Information

Software Model(s)(Version(s)Units of Measure:Description of Storm Event(s)(Include citation of reports used to develop storm events)Starting Reservoir ElevationSource of Cross Section Data(USGS topo maps, survey data, DEM)Accuracy of Cross Section Data(40 ft contours, survey grade, etc)Source of Reservoir Data(Estimate from USGS topo, detailed survey, original design)Accuracy of Reservoir Data(Rough estimate, detailed survey, etc)Other Engineering Assumptions(Range of Mannings n, contributing flows below the dam, spillway discharge, etc.)Engineer (Firm and contact information)Modifications(summary of modifications to maps, dates and who mad modifications)



Appendix B-7 Plan View of Dam

(Example drawings shown—remove this note)



Appendix B-8 Profile of Dam along Outlet Conduitor Maximum Cross Section if no outlet

(Example drawings shown—remove this note)



Appendix B-9 Reservoir Elevation-Area-Volume and Outlet and Spillway Capacity

ROCK CREEK DAM



ElevationFeet

ReservoirSurface

Area, acres

ReservoirStorageAcre-feet

SpillwayDischarge

Cfs1682 0.0 0.0 0.01684 0.3 0.3 0.01686 2.0 2.5 0.01688 3.7 8.2 0.01690 8.6 20.5 0.01692 15.9 45.0 0.01694 18.7 79.6 0.01696 23.5 121.8 0.0Outlet1697 26.2 146.7 0.001698 31.1 175.4 451700 40.8 247.3 461702 49.3 337.4 821704 62.0 448.7 871706 71.4 582.1 921708 86.7 740.2 971710 98.6 925.5 102

Emer. Spill.1712 115.0 1139.1 1081714 129.9 1384.0 5161716 145.3 1659.2 20901718 160.7 1965.2 44371720 178.8 2304.7 7763

1720.2 180.6 2340.6 7937

Maximum Outlet Discharge = 30 cfs

Maximum Spillway Discharge = 2340 cfs


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Documents

PURPOSE AND BASIC EAP DATA - ose.state.nm.us EAP Model for Da… · Web viewThe template is provided in Microsoft Word format and some notes ... If piping , increased seepage