HomeMy WebLinkAbout2017-001 Emergency Action Plan - Hosler Dam
EMERGENCY ACTION PLAN
HOSLER DAM - REEDER GULCH
FERC PROJECT NO. 1107 - OREGON
NATDAM NO. OR00110
CITY OF ASHLAND
20 E. MAIN STREET
ASHLAND, OREGON 97520
Printed: December 2016
Initial Printing: March 2016
Revision 1: January 2017
FOR OFFICIAL USE ONLY
HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
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January 2017 City of Ashland Revision 0
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FOR OFFICIAL USE ONLY
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
Table of Contents
Part I: EAP Information
A. Summary of EAP Responsibilities ......................................................................1
B. Notification Flowcharts ........................................................................................3
C. Statement of Purpose ...........................................................................................9
D. Project Description .............................................................................................10
E. EAP Response Process ......................................................................................11
Step 1: Incident Detection, Evaluation, and Emergency Level Determination
Step 2: Notification and Communication
Step 3: Emergency Actions
Step 4: Termination and Follow-up
F. General Responsibilities .....................................................................................18
F-1. Licensee Responsibilities
F-2. Notification and Communication Responsibilities
F-3. Evacuation Responsibilities
F-4. Monitoring, Security, Termination, and Follow-up Responsibilities
F-5. EAP Coordinator Responsibilities
G. Preparedness ......................................................................................................20
G-1. Surveillance and Monitoring
G-2. Evaluation of Detection and Response Timing
G-3. Access to the Site
G-4. Response during Periods of Darkness
G-5. Response during Weekends and Holidays Response during Adverse Weather
G-6. Alternative Sources of Power
G-7. Emergency Supplies and Information Stockpiling Materials and Equipment
G-8. Coordination of Information
G-9. Training and Exercise
G-10. Alternative Systems of Communication
G-11. Public Awareness and Communication
H. Inundation Maps .................................................................................................22
Part II: Appendices
Appendix-A. Investigation and Analyses of Dam Break Floods ..........................35
Appendix-B. Plans for Training, Exercising, Updating, and Posting the EAP ...37
Appendix-C. Site Specific Concerns ......................................................................39
Appendix-D. Documentation ..................................................................................40
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
Verification Paqe
The undersigned, being first duly sworn, states that he has read the following document and knows the contents
of it, and that all of the statements contained in that document are true and correct, to the best of his knowledge
and belief.
Michael R. Faught
Public Works Director
City of Ashland
State of Oregon )
ss:
County of Jackson )
Sworn to and subscribed before me by Michael R. Faught this ,9 rAL
OFFICIAL STAMP
F*1 INT RENEE DE MILLE-CAMPOS Notary
NO TARY PUBLIC-OREGON My Commission Expires: ~ I l x
COMMISSION NO. 929018
MY COMMISSION EXPIRES JUNE 18, 2018
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
A. Notification Flow Charts
Summary of EAP Responsibilities
Dam Owner / 1. Verify and assess emergency conditions
Operator 2. Notify other participating emergency management
agencies
3. Take corrective action at facility
4. Declare termination of emergency at facility
5. Update EAP on at least an annual basis
6. Respond to emergencies at the facility
7. Receive condition status reports from Dam Operator
City of Ashland 1. Receive condition status reports from Dam Owner
Police, Fire & 2. Notify Public within Ashland. City limits
Rescue 3. Conduct evacuation from inundation areas within
town limits, if required
4. Render assistance to Jackson County, as necessary
5. Render assistance to Dam Owner, as necessary
Jackson County 1. Receive condition status reports from Dam Owner
Police, Fire & 2. Notify public within Jackson County
Rescue, and 3. Conduct evacuation from inundation areas in
Emergency Services Jackson County, if required
Note:
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FOR OFFICIAL USE ONLY 1
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
Summary of Dam Owner Responsibilities
Ashland Public 1. Detect incident from alarms.
Works 2. Confirm incident by camera system.
Department 3. If no one is on-site, determine emergency level and dispatch
Personnel operator to site.
5. Make calls on notification flow chart.
6. Coordinate with Operator and Engineering on gate operations
and emergency procedures.
7. Coordinate with upstream and downstream dams on
operations.
8. Provide regular status reports to senior management.
On-site Dam 1. Detect/confirm incident at dam.
Operator 2. Determine emergency level.
3. Make calls on notification flow chart
4. Coordinate with Command Center and Engineering on gate
operations and emergency procedures.
5. Implement gate operations and other emergency procedures.
6. Provide regular status reports to senior management.
Engineering 1. Support On-site Operator and Operations Command Center on
Manager emergency level.
2. Make calls on notification flow chart.
3. Determine emergency operation and construction procedures.
4. Coordinate with Operator and Command Ctr. on gate
operations and emergency procedures.
5. Dispatch engineers & 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 notification flow chart.
Management 2. Initiate periodic status report conference calls with dam 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 Offices.
2. Participate in periodic status report conference calls with dam
site, command center, engineering, and management.
3. Provide input to staff on emergency communications.
4. Represent utility to media.
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FOR OFFICIAL USE ONLY
HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
B. Notification Charts See previous flowcharts.
C. Statement of Purpose
The primary purpose of this Emergency Action Plan (EAP) is to safeguard lives and reduce damage in the
unlikely event of catastrophic failure of Hosler Dam within the Ashland Creek Watershed. This EAP, in
total, is one specific section of the City of Ashland's Emergency Action Plan, which identifies all types of
emergency procedures for the City. This EAP specifically defines the responsibilities and notification
procedures in the event of dam failure or potential hazard involving the dam.
The EAP is designed to promulgate the Federal Emergency Regulatory Commission's regulations and
guidelines for emergency procedures. This plan may also be used in the event of significant flooding and
overtopping of the dam under extreme flooding conditions along Ashland Creek.
D. Project Description
Hosler Dam is a concrete arch dam constructed in 1928 in the Ashland Creek Watershed at Reeder Gulch.
Hosler Dam, also known as the Reeder Gulch Project #1107-OR, is owned and operated by the City of
Ashland, Department of Public Works. Hosler Dam is 118 feet tall and impounds approximately 800
acre-feet (260 million gallons ) of water behind the dam (normal spillway crest) in what is commonly
referred to as Reeder Reservoir. It is situated on Ashland Creek in the southwestern part of the State of
Oregon, three miles south of the City of Ashland and approximately 200 miles south of Salem, Oregon. It
impounds water from both the East and West Forks of Ashland Creek, which have small concrete
diversion dam structures on each fork. There are no major streams or other reservoirs upstream from
Hosler Dam.
The City's Electric Department operates a power generation plant about one mile downstream of the dam,
and the Public Works Department operates the City's Water Treatment Plant immediately downstream of
the power plant. A 24-inch ductile iron transmission pipeline (penstock) supplies water from the reservoir
behind the dam to the water treatment plant through the power generation plant.
Downstream of the treatment plant, Ashland Creek flows to the north end of the City of Ashland to the
confluence with Bear Creek 4.8 miles downstream of the dam. Bear Creek travels within Jackson County,
north through the cities of Talent (approximately 3 miles downstream of the confluence of Ashland and
Bear Creeks), Phoenix (approximately 4 miles downstream of Talent), Medford (approximately 5 miles
downstream of Phoenix), and into the Rogue River (approximately 7 miles downstream of Medford). The
inundation maps include the inundation area through the Ashland Watershed to the City of Phoenix.
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
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i
E. EAP Response Process
Step 1:Incident Detection, Evaluation, and Emergency Level Determination
The Water Treatment Plant is located on Ashland Creek a short distance below the dam. The level of
water behind the dam is monitored by telemetry, as well as daily visual observation. Operators man the
Water Treatment Plant ten hours a day throughout the year. In addition to the manned work hours, the on-
call operator has a phone and is required to respond to plant emergencies 24-hours a day while on duty.
There are alarms on the dam that notify the on-call operator by phone alarm if any abnormal rise in water
level is detected. These alarms are accessible on the laptop computer so that the operators can observe any
area of concern and monitor flow measurements simultaneously. Any abnormal rise in creek flow or drop
in reservoir level that is measured over a period of less than one hour will be investigated by the plant
operator and the plant operator will alert the Public Works Director, Public Works Superintendent, or
water emergency duty person of any abnormality. The plant operator and/or the notified person(s) will
then physically check the cause of the rising water. If there is true indication of abnormal conditions,
notification procedures will be followed.
No threat to public safety would be anticipated in the event that either the East or West Fork diversion
dam should fail. These reservoirs contain a relatively small amount of water, and an uncontrolled
discharge would only cause a small wave in Reeder Reservoir. In the event that Reeder Reservoir is full,
there would be no problem at the spillway or in the creek channel due to failure of either of these small
diversion structures.
k High Flow:
The High Flow emergency level indicates that flooding is occurring on the creek system, but
there is no apparent threat to the integrity of the dam. The High Flow emergency level is used by
the licensee to convey to outside agencies that downstream areas may be affected by the dam's
release. Although the amount of flooding may be beyond the control of the licensee, information
on the timing and amount of release from the dam may be helpful to authorities in making
decisions regarding warnings and evacuations.
If this emergency level is initiated, it is important that all parties are made to understand the dam
is NOT in danger of failing.
Non-Failure:
The Non-Failure emergency level is appropriate for an event at a dam that will not, by itself, lead
to a failure, but requires investigation and notification of internal and/or external personnel.
Examples are (1) new seepage or leakage on the downstream side of the dam, (2) presence of
unauthorized personnel at the dam, and (3) malfunction of a gate. Some incidents, such as new
seepage, may only require an internal response from the dam owner. Others, such a gate
malfunction, may lead to unexpected high releases that could pose a hazard to the downstream
public and would require the notification of outside agencies.
Potential Failure:
The Potential Failure emergency level indicates that conditions are developing at the dam that
could lead to a dam failure. Some examples are (1) rising reservoir levels that are approaching the
top of the non-overflow section of the dam, (2) transverse cracking of an embankment, and (3) a
verified bomb threat. Potential Failure should convey that time is available for analyses,
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
decisions, and actions before the dam could fail. A failure may occur, but predetermined response
actions may moderate or alleviate failure.
Imminent Failure:
The Imminent Failure emergency level indicates that time has run out, and the dam has failed, is
failing, or is about to fail. Imminent Failure typically involves a continuing and progressive loss
of material from the dam. It is not usually possible to determine how long a complete breach of a
dam 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 should assume the worst-case condition that failure has already occurred.
Event Situation Emergency
Level
Reservoir water surface elevation at auxiliary spillway crest or Non-failure
spillway is flowing with no active erosion
Earth Spillway Spillway flowing with active gully erosion Potential failure
Flow Spillway flow that could result in flood of people downstream Potential failure
if the reservoir level continues to rise
Spillway flowing with an advancing headcut that is Imminent failure
threatening the control section
Embankment Reservoir level is 0.5 feet below the top of the dam Potential failure
Overtopping Water from the reservoir is flowing over the to of the dam Imminent failure
New seepage areas in or near dam Non-failure
Seepage New seepage areas with cloudy discharge or increasing flow rate Potential failure
Seepage with significant joint offset or considerably increasing Imminent failure
discharge
Sinkholes Observation of new sinkhole in reservoir area or on embankment Potential failure
Rapidly enlarging sinkhole Imminent failure
Embankment New cracks in the embankment without seepage Non-failure
Cracking Cracks in the embankment with seepage Potential failure
Embankment Visual movement/slippage of the embankment slope Non-failure
Movement Sudden or rapidly proceeding slides of the embankment slopes Imminent failure
Instruments Instrumentation readings beyond predetermined values Non-failure
Measurable earthquake felt or reported on or within 25 miles of the Non-failure
Earthquake dam
Earthquake resulted in visible damage to the dam or appurtenances Potential failure
Earthquake resulted in uncontrolled release of water from the dam Imminent failure
Verified bomb threat that, if carried out, could result in damage potential failure
Security to the dam
Threat Detonated bomb that has resulted in damage to the dam or
Imminent failure
appurtenances
Sabotage/ Damage that could adversely impact the functioning of the dam Non-failure
Vandalism Damage that has resulted in seepage flow Potential failure
Damage that has resulted in uncontrolled water release Imminent failure
logo
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
Step 2: Notification and Communication
The notification procedure will follow the sequence noted on the Flow Charts. The first line of
communication will be the telephone via the automated Everbridge system, followed by manually calling
on telephone as per flow charts, followed by radio communication on the City's Public Works
communications frequency, followed by personal contact, if necessary. The emergency dispatch monitors
all Public Works radio frequencies and can communicate on that frequency as well.
In the case of sudden dam failure, direct notification of all immediately affected downstream persons and
businesses within the limits of inundation may not be possible because of the lack of warning time. In the
event of complete dam failure, the flood-wave would reach the City center (the Plaza) in a time period
calculated to be approximately 8 to 10 minutes. Therefore, the City has installed an automated audible
emergency warning system which relies on independent transceivers and will operate without reliance on
the existing telephone system, which is vulnerable to failure during catastrophic events.
The sensor array described in Section IV, Emergency Detection, Evaluation & Classification will transmit
an alarm signal to the Water Treatment Plant. The operator at the plant will verify failure before
proceeding with notification procedures to initiate the EA-P.
The audible sirens consist of four siren stations distributed along the edge of the inundation zone within
City limits. Each station consists of four 144 db 311 Hz air powered horns mounted on 20-foot high
towers. The horns are powered from 2200 psi, 125 pound air bottles and will be controlled to give a
distinct intermittent sound. These horns will have a range of about 1/3 of a mile under adverse weather
conditions and over 2/3 of a mile under good conditions (above background noise level of 80 db).
EverBridge Message
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Step 3: Emergency Actions
IMMINENT FAILURE
Water Treatment Plant Manager or Operator on duty will contact Fire Chief via telephone, (911), or radio,
and then evacuate the premises to higher ground.
"This is the Water Treatment Plant Operator. Dam failure is imminent (or has occurred). I am
evacuating the area and will contact you when I am safe."
The Fire Chief will take the following action:
1. If possible, determine whether the dam has failed and verify any other pertinent information.
2. Manually sound the audible alarm system and initiate any other available notification procedures to
rapidly warn the public of imminent failure.
3. Activate the Everbridge automated telephone notification system with pre-canned messages for EMAs
and residents of the inundation area.
or
Notify the Chief of Police via telephone, (911), or radio and pass on pertinent information.
Since the City Hall would undoubtedly be damaged or inundated, the Ashland Police Department will
take charge of all notifications and communications.
The Chief of Police will take the following action:
1. Determine if City Hall is still in operation either through phone calls (see 4 below) or visibly
driving to the Plaza area and observing the building and the creek.
2. Notify Public Works Director who will notify the following individuals:
- City Administrator
- Fire Chief
- Electric Systems Distribution Manager
- Public Works Superintendent
Persons listed above will then notify outside agencies in accordance with the imminent failure
notification flow chart.
3. Notify the following outside agencies:
The National Weather Service
The Ashland Community Hospital
Jackson County Emergency Dispatch
The Jackson County Emergency Services Manager requesting that all affected
emergency services downstream from Ashland be notified.
The Regional Dam Safety Engineer
4. In accordance with the City of Ashland's Emergency Management Plan, a Command Operations
Center and Information Officer will be established at the Ashland Civic Center, 1175 E. Main
Street - or other location if required.
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Emergency Action
POTENTIAL FAILURE
If there is any prior indication that Hosler Dam is going to fail or that there are unknowns in which further
assessment is necessary, the Water Treatment Plant Manager or Operator on duty shall contact the
following personnel by telephone or radio:
Notify Public Works Director who will notify the following individuals:
- City Administrator at
- Fire Chief at
- Electric Systems Distribution Manager
- Public Works Superintendent
- The Regional Dam Safety Engineer
Persons listed above will then notify other agency in accordance with Potential Failure
notification flow chart.
The Treatment Plant Manager or Operator on duty will state:
"This is the Ashland Water Treatment Plant Operator. I have received (or observed) indications
that Hosler Dam may be experiencing problems with overtopping, or that a hazardous situation is
developing. I need your help to initiate evaluation and possible notification procedures as outlined
in the Emergency Action Plan and the City's Emergency Operations Plan.
You need to initiate notification procedures shown on the "Potential Failure" notification flow
chart I am securing the plant and will evacuate the area. I will contact you when I am safe".
1. City personnel at the Water Treatment Plant will secure the plant to the best of their abilities without
endangering themselves, and evacuate the area for higher ground. Once at a safe location, the
operator will provide a full assessment to the Public Works Director as soon as time allows. If it is
safe to re-enter the inundation zone, the operator may do so.
2. After assessment of the situation and if there is determination that the dam may fail or is in danger of
a significant hazard developing, the Public Works Director will immediately contact the Police
department by telephone (911) and/or radio.
3. The Public Works Director, City Administrator, Police Department and Public Works Superintendent
will begin notifications of other agencies as per the EAP-2 notification flow chart on page 7.
NOTE: In addition to the above notifications, the Public Works Director or Public Works Superintendent
will determine if it would be prudent to lower the water level in the reservoir. If such determination is
made, this information will be given to all agencies notified so that appropriate action can be taken by
those agencies as water levels in Ashland Creek could be rising and downstream areas could be affected.
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
NON FAILURE
If there is any prior indication that Hosler Dam is going experiencing new seepage, leakage, equipment
failure, or a security situation, the Water Treatment Plant Manager or Operator on duty shall contact the
following personnel by telephone or radio: Public Works Director, who may notify the following
individuals if it is appropriate for the situation:
- City Administrator at
- Fire Chief at
- Electric Systems Distribution Manager
- Public Works Superintendent
The Regional Dam Safety Engineer
Persons listed above will notify other agency in accordance with notification flow chart for High Flow.
The Treatment Plant Manager or Operator on duty will state:
"This is the Ashland Water Treatment Plant Operator. I have received (or observed) indications
that -(INSERT DESCRIPTION OF ISSUE HERE for example,new seepage or leak,
unauthorized personnel present, equipment malfunction) Hosler Dam is not experiencing
problems , but I need your help to initiate the "non-failure" notification procedures outlined in
the Emergency Action Plan and the City's Emergency Operations Plan.
You need to initiate notification procedures shown on flow chart. I am securing the plant and but
will not be evacuating at this time."
HIGH FLOW
If there is any prior indication that Hosler Dam is going experience a High Flow situation, the Water
Treatment Plant Manager or Operator on duty shall contact the following personnel by telephone or radio:
Public Works Director, who will notify the following individuals:
- City Administrator at
- Fire Chief at
- Electric Systems Distribution Manager
- Public Works Superintendent
The Regional Dam Safety Engineer
Persons listed above will notify other agency in accordance with notification flow chart for High Flow.
The Treatment Plant Manager or Operator on duty will state:
"This is the Ashland Water Treatment Plant Operator. I have received (or observed) indications
that Ashland Creek is experiencing unusually high flows. Hosler Dam is not experiencing
problems , but I need your help to initiate the "High Flow" notification procedures outlined in the
Emergency Action Plan and the City's Emergency Operations Plan.
You need to initiate notification procedures shown on flow chart . I am securing the plant and but
will not be evacuating at this time."
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
Table 1; High Flow Operation/Notification Table
Flow (cfs) Operation Procedures Expected Impacts Organizations to Notify
Inspect spillway for debris
< 900 buildup and remove as None None
necessary
Open spillway gates (if Local Police and Fire
900- 1,400 closed) to maintain normal None Departments
water surface level
Open 24-inch outlets to Overtopping possible if outlet Per EAP Notification
1,400 - 1,700 prevent overtopping, monitor operation is impaired, leading Flowchart
(EAP "High Flow") erosion of abutment and to erosion at left embankment
foundation material if
overtopping
Open 60-inch outlet to Silt discharged downstream Per EAP Notification
1,700 - 2,800 prevent overtopping, monitor from 60-inch outlet; Flowchart
(EAP "Potential Failure") erosion of abutment material overtopping possible if outlet
if overtopping operation is impaired, leading
to erosion at left embankment
Activate procedures, evacuate Overtopping of parapet walls, Per EAP Notification
2,800 - 16,714 Water Treatment Plant and flooding throughout Flowchart
(EAP "Iminent Failuredam site, begin notification inundation zone, erosion of
and evacuation of inundation left embankment material
zone
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FOR OFFICIAL USE ONLY
HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
F. General Responsibilities under the Emergency Action Plan
F-1. Licensee Responsibilities
The Water Treatment Plant Operations Division of the Ashland Public Works Department is responsible
for maintenance and operations of Hosler Dam and Reeder Reservoir. As such, the Water Treatment Plant
Supervisor and the plant operators are responsible for major decisions relating to emergency situations.
Because of the location of the Water Treatment Plant on Ashland Creek below Hosler Dam, the Water
Treatment Plant Operators are uniquely situated to observe any changes of flow in Ashland Creek which
might indicate a problem or emergency situation at the dam. The plant operators have daily
responsibilities that include observations of the dam and recordings of the water elevations behind the
dam face. Water Treatment Plant Supervisors and Operators are the key personnel who are generally
responsible under the Emergency Action Plan. These personnel have been advised of the importance of
the EAP and why it is necessary. They are also exercised annually on the proper communication channels,
secondary communications and how to apply proper notification procedures under this EA-P.
F-2. Responsibility for Notification
The Water Treatment Plant Operators have primary responsibility for notification of dam failures or any
significant changes in the water level behind the dam as shown in the EA-P. Their activities are
documented in daily operations logs at the Water Treatment Plant.
Plant personnel duties include knowing the location of the EAP document, thorough study and knowledge
of its content, participation with other key personnel in study sessions of the EAP elements, and
participation in review and test sessions of emergency communication and notification procedures.
Actions the operators take after completing notification responsibilities depend upon the specific
situation. There are not certain sequences predicted for opening or closing of valves or gates, and
decisions will be made based upon the immediate situation. If there is any doubt as to the actions to be
taken, the next level of supervisors (Water Treatment Plant Supervisor or Public Works Superintendent)
is empowered to make the decision or gain additional expertise necessary to make such a decision.
The chain of command and notification procedures are shown on the Notification Flow Charts.
Public Works key personnel, as indicated on the Notification Flow Charts, will keep local authorities
advised of conditions at the dam by use of telephone, radio and/or personal contact, as appropriate or as
available. The National Weather Service will be utilized to obtain flood warning information. Jackson
County, through the Southern Oregon Regional Communications Center, will be the clearinghouse and
the Jackson County Emergency Operations Center will have additional coordination responsibilities for
all emergency activities throughout the County.
F-3. Responsibility for Evacuation
Should evacuation be required, the City's Emergency Management Plan will be enforced. The Incident
Commander (in this case, most likely the Public Works Director) will advise 911 Emergency Dispatch
and evacuation procedures will begin. With annually-updated inundation maps and accurate aerial
photography (2012) the City has detailed mapping of evacuation routes, water levels and other pertinent
information available for emergency situations.
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20 FOR OFFICIAL USE ONLY
FOR OFFICIAL USE ONLY
HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
F-4. Monitoring, Security, Termination, and Follow-up Responsibilities
Termination of the emergency will be at the discretion and direction of the City's Incident Commander
(in this case, most likely the Public Works Director). Follow-up procedures for the dam are the
responsibility of the Public Works Director. Any necessary changes to the EAT or other emergency
procedures recommended, at any level, will be channeled through the Public Works Director for inclusion
in the Plans.
F-5. EAP Coordination Responsibility
The designated EAP coordinator, who is responsible for related activities including, but not limited to
preparing revisions to the EAT, coordinating EAP tests, etc. is the Public Works Director, direct 541/552-
2411 or through clerical staff assistance at 541/488-5587. The Water Treatment Plant Supervisor,
541/488-5345 is responsible for the surveillance and observations at the dam and for establishing training
exercises for plant operators.
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FOR OFFICIAL USE ONLY 21
FOR OFFICIAL USE ONLY
HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
G. Preparedness
G-1. Surveillance and Monitoring
The dam is unmanned, and is located on Ashland Creek approximately one (1) mile above the Water
Treatment Plant. The level of water behind the dam is monitored by telemetry, as well as daily visual
observation. Water levels will be monitored by sensor array as part of the automated emergency audible
warning system. The level of Ashland Creek is visibly monitored daily and flow gages are checked
routinely. The Water Treatment Plant has operators on duty at the plant 10 hours a day seven days a week
throughout the year. There is an operator on-call at all other times. There are alarms on the dam that
notify the on-call operator by phone alarm if any abnormal change in water level is observed. In addition
to monitoring at the Water Treatment Plant, the dam site is visited daily by the Water Treatment Plant
Supervisor or Operator on duty. The frequency of surveillance of the dam by these personnel is increased
during inclement weather or other critical times.
The dam level is monitored by computer at the Water Treatment Plant. Should the level of the dam
increase or decrease rapidly (e.g. three feet in five minutes) an alarm is activated at the Water Treatment
Plant. During that part of the day when the Water Treatment Plant is unmanned, all alarms are relayed to
the Duty Operator by means of an auto-dialer. The Duty Operator carries a cellular telephone that is
dedicated for this purpose. The Duty Operator can monitor the alarms on the laptop computer via the
SCADA system.
In the event that the headwater or the tail-water alarm is activated while the Water Treatment Plant is
manned, the operator on duty shall, before initiating the Emergency Action Plan, determine visually
whether a problem exists or not. This includes observation of the water level on the creek and/or
observation of the dam itself to rule out the possibility of a false alarm. The operator will check the Hosler
Dam level readout and the tail-water level readout in the telemetry headquarters panel in order to identify
any significant changes in stream level or stream flow. If there are no significant decreases in dam level
or increases in stream level, the alarm will be judged as a false alarm and the operator will resume normal
work duties.
Should there be a significant decrease (3 feet) in the level of the reservoir and a significant increase in the
level (2 feet) of the creek running through the plant, the operator will immediately initiate the Emergency
Action Plan, Notification Flowcharts: FAILURE IMMINENT or HAS OCCURRED. Once this has been
done, the operator will evacuate the premises for higher ground.
Once confirmation is received that the alarm is valid and activation of the Emergency Action Plan has
begun, the Fire Department will begin evacuating residents from the inundation zone. The automated
emergency siren system may have already sounded if failure of the dam has occurred.
G-2. Evaluation of Detection and Response Timing
G-3. Access to the Site
is generally by an unimproved, but well-maintained gravel road. In adverse weather, four-wheel drive
vehicles or other equipment can access the dam. In the case where the road might be flooded or washed
out, the dam is accessible by foot by way of a fire trail. Travel time by foot is generally less than 30
minutes to reach the dam face from the Water Treatment Plant.
March 2016 City of Ashland Revision 0
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22 FOR OFFICIAL USE ONLY
FOR OFFICIAL USE ONLY
HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
G-4. Response during Periods of Darkness:
As previously discussed, there are on-duty personnel available 24 hours a day. Illumination is available
through the use of the dam crest camera, owned and operated by the Water Quality Division. This is
emergency equipment and is available at all times, day and night, for emergencies and when necessary.
Other personnel can be called to assist. Response time is short since the on-duty person has a City vehicle
and radio/paging equipment available to them at all times, and is required to maintain a 20-minute
response time.
G-5. Alternative Sources of Power:
The Water Treatment Plant, Fire Station, and City Hall all have backup emergency generators, and the
dam does not presently have any major electrical power loads.
G-6. Emergency Supplies and Information Stockpiling Materials and Equipment
The City of Ashland is well supplied with manpower, equipment and materials for use in emergency
situations. In addition, the Water Quality Division can call upon other divisions of the Public Works
Department as well as other departments within the City. The City also maintains a list of contract
suppliers for both equipment and emergency supplies not generally maintained by the City, but used
during emergency situations. In addition to supplies and equipment, the City maintains a list of available
resources and professional contacts for assistance in case of emergencies.
G-7. Training and Exercise
See Appendix-B
G-8. Alternative Systems of Communication
The Water Quality Division has radio equipment in all vehicles and also has a number of portable
transceivers (radios) available. This radio equipment is available for use at the dam at any time, and in
many cases is the most reliable means of communication in the canyon.
G-9. Public Awareness and Communication
Ashland Fire and Rescue's Citizen Emergency Response Team
H. Inundation Maps
A study and analysis of the extent of possible inundation expected upon failure of Hosler Dam was
completed by Harza Engineering Company on October 26, 2000. Two required dam break analyses were
completed: one for the PMF during sunny day conditions ("fair weather"), and the second during flood
("wet weather") conditions. A copy of a reduced size (11" x 17") set of the inundation maps is enclosed.
March 2016 City of Ashland Revision 0
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FOR OFFICIAL USE ONLY 23
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FOR OFFICIAL USE ONLY
HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
Appendix-A. Investigation and Analyses of Dam Break Floods
Table 2: "Fair Weather" Dam-Break Results
Cross Section Maximum Maximum Peak Arrival Peak Recession
(miles downstream Elevation Incremental Discharge Time Time Time
from dam) (feet) Rise (cfs) (minutes) (minutes) (minutes)
(feet)
Just Below Dam 2809.4 47.4 201,000 0.6 4.2 48
(0.01)
Water Treatment 2486.3 38.3 154,000 2.4 6 54
Plant
(0.9)
Southern City 2248.7 30.2 133,000 4.8 7.8 60
Limit
(1.6)
S. Pioneer Street 2028.3 24.8 118,000 7.2 9.6 78
Bridge
(2.4)
Main Street Bridge 1895.5 24.7 94,000 9.6 13 90
(3.2)
Nevada Street 1759.4 15.4 70,000 16 22 108
Bridge
(4.2)
Ashland Creek 1708.6 14.3 5100 23 30 126
Confluence with
Bear Creek
(4.8)
Butler Creek Inlet 1676.9 8.8 32,000 37 48 156
To Bear Creek
(5.8)
Meyer Creek Inlet 1618.4 8.9 17,000 66 90 210
To Bear Creek
(7.6)
Talent 1569.4 6.0 15,000 102 126 330
(9.3)
Phoenix 1488.7 5.4 1300 168 192 360
(11.9)
Notes:
1. All times are measured in minutes after the initiation of the dam-break.
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
Table 3: "Wet Weather" Dam-Break Results
Cross Section Maximum Maximum Peak Arrival Peak Recession
(miles downstream Elevation Incremental Discharge Time X Time Time"
from dam) (feet) Rise (cfs) (min) (min) (min)
(feet)
Just Below Dam 2812.7 36.3 22900 0.6 4.8 24
(0.01)
Water Treatment 2489.7 29.4 186,000 2.4 6 30
Plant
(0.9)
Southern City 2251.5 19.8 164,000 4.8 7.8 36
Limit
(1.6)
S. Pioneer Street 2030.5 16.6 143,000 6 9.6 42
Bridge
(2.4)
Main Street Bridge 1897.8 11.4 12100 9.6 12.6 48
(3.2)
Nevada Street 1761.6 10.6 94,000 14.4 21 54
Bridge
(4.2)
Ashland Creek 1713.1 7.3 7700 20.4 26.4 78
Confluence with
Bear Creek
(4.8)
Butler Creek Inlet 1682.0 4.7 7400 30 37.8 102
To Bear Creek
(5.8)
Meyer Creek Inlet 1626.5 4.0 52,000 46.8 60 174
To Bear Creek
(7.6)
Talent 1575.2 2.4 49,000 72 84 198
(9.3)
Phoenix 1494.2 1.9 46,000 108 120 228
(11.9)
Notes:
* All times are measured in minutes after the initiation of the dam-break.
* * Recession time would be dependent on the extreme natural flooding that is assumed to occur
simultaneously with the dam-break.
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
Appendix-B. Plans for Training, Exercising, Updating, and Posting the EAP
Training
Training of project operators and other responsible personnel will be conducted annually:
Items to be covered include, but are not limited to:
1. Description and purpose of the EAP
2. Location of copies of the EAP
3. General responsibilities under the EAP
4. Notification procedure / chain of command
5. Communication systems and alternates
6. Audible Emergency Warning System
7. Emergency supplies and resources
8. Dam-Break Analysis and inundation maps
Subsequent to each annual training session, a statement will be prepared which includes the date of the
training, an attendance list of personnel involved, and a summary of topics discussed. A copy of the
statement will be included with the annual review of the EAP.
Exercising
An annual test will be made each year. All persons, organizations and entities shown on the Flowchart
will be contacted. The test will be to verify the following:
1. The chain of command works properly;
2. Personnel names and phone numbers are correct; and
3. The audible Public Emergency Warning System works properly.
Items I and 2 will be conducted by telephone backed up by radio communication if necessary. Item 3 will
be conducted after notification to the general public that a test of the audible warning system will be
made. The duration of the audible warning will be very brief (i.e. on the order of 5 to 10 seconds) so that
there will be a clear distinction between the test and an actual emergency.
The Dam Safety Engineer will determine if the test was successful and will furnish the FERC Regional
Director within 30 days of the date of the test with a statement that the EAP has been tested and it will
include any revisions to the plan or a statement that no revisions are needed as a result of the test.
Copies of dated revisions to the EAP resulting from the test will be furnished to all persons on the EAP
distribution list.
Updating
Each year, the Director of Public Works will review all aspects of the EAP to determine any new
developments or other changes downstream or elsewhere which would necessitate any revisions to the
EAP.
A statement will be furnished to the FERC Regional Director annually that the EAP has been reviewed
and the date it was last tested, with inclusion of any needed revision or a statement that no revisions are
needed. All plan holders listed will be provided with dated copies of all revisions.
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
Posting the EAP
The EAP has been distributed to key supervisory and operational employees, as well as personnel listed
on the flow chart. Notification flow charts are provided at the front of the Emergency Action Plan for
easy access. A copy of the EAP can be found in a prominent location near the telephone and radio
transmitter at the Water Treatment Plant, the closest site to the dam, and easily accessible to the WTP
manager overseeing the facility. The EAP is also readily available to appropriate plant operators,
responsible personnel, and the City's police and emergency (911) dispatch center.
An up-to-date copy of the Emergency Action Plan and flowchart/notification list is posted in a prominent
location near telephone and/or radio transmitters at the following locations:
1. The Water Treatment Plant operator's office.
2. The City Administrator's office at City Hall (20 E. Main Street).
3. The Director of Public Works' office in the Community Development & Engineering
Service Building (51 Winburn Way)
4. The Water Quality Superintendent's office at the Service Center (90 N. Mountain
Avenue)
5. The Director of Electric Utilities office at the Service Center (90 N. Mountain Avenue)
6. The Police Department (1175 E. Main Street)
Letters of acknowledgment from contracted agencies and documentation of the most recent consultations
with Federal, State and local agencies will be forwarded to the Federal Energy Regulatory Commission.
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
Appendix-C. Site Specific Concerns
Other Concerns and Actions
Creek flow into the reservoir is from natural runoff and cannot be completely managed, coordinated or
manipulated. The reservoir water surface can be lowered by use of the three valved outlets. Since this
reservoir is the primary source of the City's water supply, it is critical that the water level not be lowered
except in the case impending disaster. Because of this, operators would not make this decision on their
own, but would act only on instruction from their supervisors, who in turn would only act on orders from
the responsible person in charge, such as the Public Works Director or, in the Director's absence, the City
Administrator.
Actions can be taken to reduce inflow in to the reservoir, as there are no significant upstream control
structures. Actions can be taken to alter downstream flows by regulating the outflow of the reservoir by
use of existing valves. Such action would be based upon a timely evaluation of the situation and a
decision by any of the Water Division supervisors.
Over the past eighty years, the dam and reservoir have withstood a number of major floods, fires, and
freezing/thawing events. These emergencies were mitigated successfully by personnel and judgment of
the managers of the City of Ashland. The City is prepared to handle anticipated emergency. The City is
not aware of any special concerns or actions to be taken at this time.
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40 FOR OFFICIAL USE ONLY
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HOSLER DAM EMERGENCY ACTION PLAN PROJECT NO. 1107 - OREGON
Appendix-D. Documentation
Hosler Dam was constructed in 1928 in Ashland Canyon. It impounds water from both the East and West
Forks of Ashland Creek which diverts water from the 7,533 foot high Mount Ashland peak. The dam has
been inspected every five years times in recent years by independent dam safety engineers and has been
certified. The last inspection was by URS Corporation, an independent structural engineering consultant
approved by the Federal Energy Regulatory Commission.
The dam is founded on light-gray, medium-grained granite rock of the Ashland Pluton. The original
design and evaluations have certified the subgrade material as hard, sound, granite with excellent bearing
capacity. The dam is constructed of reinforced concrete and the foundations are sound. Earthquake
activity in the area is of low to moderate frequency and intensity. With the exception of two small
diversion dams, there are no structures upstream of the dam.
Based upon the most recent Hosler Dam Stability Analysis prepared for the City of Ashland (URS
Corporation, August 22, 2012) the results of the stress analysis using finite element method are within
acceptable limits.
There are no nuclear plants within a ten-mile radius of the City's reservoir. The emergency action plans
address both slowly developing failure and instantaneous failure.
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