Participant Section for Cass County Rural Water District #2

 
 
Participant Section for Cass County Rural Water District #2
Lower Platte South NRD Multi-Jurisdictional Hazard Mitigation Plan
November 2008
_________________________________________________________________________________________________




                  Participant Section
                for Cass County Rural
                   Water District #2


                  Lower Platte South NRD
         Multi-Jurisdictional Hazard Mitigation Plan




                                      November 2008




                                     JEO project # 385D23




_________________________________________________________________________________________________
Cass County RWD #2 Participant Section                                                      CR2-1
Participant Section for Cass County Rural Water District #2
Lower Platte South NRD Multi-Jurisdictional Hazard Mitigation Plan
November 2008
_________________________________________________________________________________________________



CASS COUNTY RURAL WATER DISTRICT (CCRWD) #2 BACKGROUND
LOCATION/GEOGRAPHY/CLIMATE
Cass County Rural Water District #2 covers roughly one-third of western Cass County starting five miles
west of Weeping Water to the Lancaster County on the west, Sarpy County to the north, and Otoe County to
the south. More specifically, the district covers the territory from three miles north of Murdock south to Hwy
2, two miles east of Elmwood to one-half mile west of Walton.

The climate is cold in the winter; January its coldest month averaging a daily high of around 33 degrees
Fahrenheit. Most of the precipitation occurs between May and July, and the hot summers yield temperatures
averaging in the high 80’s for one quarter of the year. Approximately 32 inches of precipitation falls on Cass
County Rural Water District #2, which falls as rain, snow and sometimes hail.

According to the Flood Insurance Study the topography of Cass County is characterized by a flat valley
bordered by steep bluffs. Areas adjacent to the flood plain are characterized by rolling hills of loess soils
overlying glacial drift. Vegetation in the area consists primarily of agricultural crops. Some trees are present
along the banks of the river.

Cass County Rural Water District #2 was organized as a rural water district in 1972. Test drillings were held
right outside of Alvo in July of 1977 and six months later, property was purchased and two wells drilled. The
district office was established in Elmwood in 1978.

In June, 1980 Cass County Rural Water District #2 began construction of two wells, line installation, and a
water tower. This project cost a total of $2.3 million and was completed in July of 1981. The next month,
Cass County Rural Water District #2 officially began operation with 355 hookups.

Since then another well was drilled in 1994, a second tower west of Eagle was built in 1998, and a booster
station north of Eagle installed in 1999. Four years later in 2003, another well was drilled and drive-by meters
installed for the entire system. In 2004 a generator was installed and activated at the same time an assistant
manager was hired.

At the time of the planning period, Cass County Rural Water District #2 had 653 active hookups, serving
approximately 2,000 users. Cass County Rural Water District #2 serves people in areas including the
Woodland Hills and Walton subdivisions, the Village of Murdock, and several rural areas. There are
numerous rural livestock farmers who rely heavily on the District.

See upfront section for a description of what Rural Water Districts are.

FUTURE DEVELOPMENT TRENDS
Cass County Rural Water District #2 will most likely not change its borders and will not experience any
future development outside of its borders. Any future development will take place within the District as the
Village, subdivisions, and rural areas within grow. The following Figure CR2.1 shows the borders of Cass
County Rural Water District #2 and the current corporate limits of the jurisdictions within.

It is anticipated that the growth within Cass County Rural Water District #2 will be slight to moderate, adding
somewhere between five and twenty users per year.




_________________________________________________________________________________________________
Cass County RWD #2 Participant Section                                                      CR2-2
Participant Section for Cass County Rural Water District #2
Saunders
                                                                                                   County                                                                                                            Sarpy                                                                       State Highway 66
                                                                                                                                                                                                    South Bend       County
                                                                                                                                                                 0                                                                                 Louisville
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                                                                                      Greenwood




                                                                                                                                                                                                                                       State Highway 50
                                                                                                                                                                                       Murdock
                                                                                                                                                                                                                                                          Manley
                                                                                                                                                                                                                                                                                    State Highway 1
                                                                                                                                                                                                        State Highway 1
                                                                            Waverly

                                                                                                                                                                                                 Cass
                                                                                                                                                                                                County




                                                                                                                                                                                298th St
                                                                    Lancaster
                                                                     County

                                                                y
                                                          r   Hw                                                             Cass County Rural Water District #2                                                                                                      Weeping Water
                                                       ke
                                                  us                                                                                 Alvo
                                         r   nh
                                      Co




                                                                                                                                                                           Elmwood




                                                                                                                                                                                                                                                                             144th St
                                                                                                                                         238th St




                                                                                                                                                                                     298th St
                                                                                                                                                                                                                                                                          Legend




                                                                                                                                                                                                                                                                                                  S 132nd St
                                                                                                                                                                                                 O St
                                                                                               Eagle                                                                                                                                                                                    City Limits

                                                                                                                                                                                                                                                                                        County Boundary
             O St
                                                                                                                                                                                                                                                                                               Avoca
                                                                                                                                                                                                                                                                                        Rural Water Districts
                                                                                                      S 214th St




                                                                                                                                                                                                                                                                                        Sections
                                                                                                                                                                                                                                                                                        Major Lakes

                                                                                                                                                                                                                                                                                        Rivers




                                                                                                                                                                                                                                                          N 30th Rd
                                                                                                                                                                                                                               Otoe                                        1.5           0.75                  0    1.5 Miles

                                                                                                                                                                                                                              County




                                                                                                                                                                                                                                                                                                                                CR2.1
Prepared By: JEO Consulting Group, Inc.
Source of Aerials and City Limits: NDNR
Software Used: ESRI ArcView 9.2 sp2

THIS MAP PREPARED USING INFORMATION FROM RECORD
DRAWINGS SUPPLIED BY JEO AND/OR OTHER APPLICABLE
                                                                                                                                  Cass County Rural Water District #2
CITY, COUNTY, STATE, FEDERAL OR PUBLIC OR PRIVATE ENTITIES.
JEO DOES NOT GUARANTEE THE ACCURACY OF THIS MAP OR
THE INFORMATION USED TO PREPARE THIS MAP.
                                                                                                                            - Lower Platte South NRD Hazard Mitigation Plan -
Created By: M Schwab, July 24, 2008
Contact Person: Jared Nelson
JEO Project Number: 385D23
                                                                                                                                       Figure CR2.1: Location Map
Participant Section for Cass County Rural Water District #2
Lower Platte South NRD Multi-Jurisdictional Hazard Mitigation Plan
November 2008
_________________________________________________________________________________________________

PLANS, DOCUMENTS, AND INFORMATION USED
A variety of sources including studies, reports, and technical information have been used to develop the plan.
General sources of information used for all sections of the plan are discussed in Section 2: Planning Process.
Below is a list of specific sources used to establish Cass County Rural Water District#2’s participant section
and their program status as provided by Cass County.

TABLE CR2.1: STUDIES, REPORTS, REGULATIONS, AND PROGRAMS
Study/Report/Regulation                         Yes/No             Date Completed                 Incorporated into Plan?

Cass Co. Comprehensive Plan                                           1999 and
                                                  Yes                                                     Yes/No
                                                                   March 20, 2007
Cass Co. Zoning/Subdivision Regulations           Yes                  1999                                 No
Effective Floodplain Maps and FIS            May 19, 1987              Varies                              Yes
Program                                      Participation?       Membership Date                 Incorporated into Plan?
CRS                                               No                    N/A                                N/A
NFIP (Cass County)                                Yes                 Current                              Yes



CASS COUNTY RWD #2 RISK ASSESSMENT
Cass County Rural Water District #2’s risk assessment was established through public input and information
provided by district staff, and by research of each hazard identified in the State of Nebraska Hazard
Mitigation Plan.

HAZARD IDENTIFICATION
Below, in Table CR2.2 is a composite of hazards identified in the District, their likelihood to occur again, and
to what extent of damage may occur. Cass County Rural Water District #2’s ‘Public Opinion Composite
Hazard Identification’ table was compiled after receiving responses from the public and community officials.

TABLE CR2.2: PUBLIC OPINION HAZARD IDENTIFICATION TABLE
                                PREVIOUS               LIKELY TO           PROBABILITY
                                                                                                                    EXTENT
HAZARD TYPE                   OCCURRENCE?          EXPERIENCE?                Highly Likely/
                                                                                                       Catastrophic/Severe/Limited/None
                                    Yes/No               Yes/No        Likely/Possible/Unlikely
Severe Winter Storm                  Yes                  Yes                     Likely                             Severe
Tornado/High winds                   Yes                  Yes                 Highly Likely                        Catastrophic
Severe Thunderstorm                  Yes                  Yes                 Highly Likely                          Severe
Flooding                             Yes                  Yes                     Likely                             Severe
Extreme Heat                         Yes                  Yes                     Likely                             Severe
Drought                              Yes                  Yes                     Likely                             Severe
Earthquake                           No                     No                   Possible                          Catastrophic
Wildfire                             No                     No                   Unlikely                             None
Landslide                            No                     No                   Unlikely                             None
Dam Failure                          No                   Yes                    Possible                            Severe
Levee Failure                        No                     No                   Unlikely                             None


In the following sections the hazard types which have a significant likelihood of occurring or have reason to
potentially occur are discussed. Due to geographic location, the following hazard types were not considered:


_________________________________________________________________________________________________
Cass County RWD #2 Participant Section                                                      CR2-4
Participant Section for Cass County Rural Water District #2
Lower Platte South NRD Multi-Jurisdictional Hazard Mitigation Plan
November 2008
_________________________________________________________________________________________________

volcanic eruption, avalanches, tidal surges, and tsunamis; as these disasters do not affect the region of
Nebraska. Levee failure was not considered due to there being no Levees in Cass County Rural Water District
#2. Furthermore, wildfires were eliminated from detailed discussion for Cass County Rural Water District #2,
for they do not pose a significant enough threat, as discussed in detail in Section 3: Risk Assessment.

INFRASTRUCTURE INVENTORY AND VALUATION
Cass County Rural Water District #2 only owns and operates infrastructure related to distributing water to
users. The risk assessment as discussed in the following only pertains to pipes, and other infrastructure they
own and operate. Other infrastructure and structures that are in the District, but not property of, are covered
in the county and incorporated community sections.

Cass County Rural Water District #2’s main infrastructure consists of 180 miles of pipelines, two water
towers, one pump house, one booster station, four wells, and the office building. The total value of Cass
County Rural Water District #2’s infrastructure is $10,432,000. The underground infrastructure is valued at
$9,000,000 and the remaining $1,432,000 is above ground. Below in Table CR2.3 shows the property owned
by Cass County Rural Water District #2 and their insured values.

TABLE CR2.3: CASS COUNTY RURAL WATER DISTRICT #2 INFRASTRUCTURE VALUE
Property                               Insured Value
Office Building                           $183,000
Business Property                          $56,000
Well House & Equipment                    $106,000
Tower #1                                  $388,000
Tower#2                                   $388,000
Booster Station                            $99,000
Murdock Pit & Equipment                    $30,000
Pressure Reducing Vault & Equipment        $10,000
Generator & Equipment                     $172,000
Underground Pipe                         $9,000,000
TOTAL                                   $10,432,000

CRITICAL INFRASTRUCTURE
Critical facilities were identified by the District as those structures essential for returning the community’s
functions to normal during and after a disaster. A map showing Cass County Rural Water District #2’s critical
facilities are found in Figure CR2.2.

Cass County Rural Water District #2’s infrastructure lies largely underground. The 180 miles of pipeline
accounts for 86 percent of the total value of Cass County Rural Water District #2’s property, with a value of
$9 million dollars. The critical infrastructure identified by the District include the two water towers, four
wells, a booster station, a pressure reducing vault, the office, and the Murdock pit.




_________________________________________________________________________________________________
Cass County RWD #2 Participant Section                                                      CR2-5
Participant Section for Cass County Rural Water District #2
Critical Facility Number                                          Critical Facility
                                                                                                                                                                                                                                      1                        Water Tower #1 - Alvo
                                                                                                                                                                                                                                                                                State Highway 66
                                                                                                                                                                                                     South Bend                       2                        Water Tower #1 - Eagle
                                                                                                                                                                                                                                                        Louisville
                                                                                                                                                                  0
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                                                                                                                  6
                                                                                                                                                                                                                                      3                        Well #4




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                                                                                                                                                                                                                                      5                        Well #2




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                                                                                                                                                                                                                                      8                        Pressure Reducing Vault
                                                                                                                                                                                                                                      9                        Murdock Pit
                                                                              Greenwood                                                                                                                                              10                        Office




                                                                                                                                                                                                                                            State Highway 50
                                                                                                                                                  8
                                                                                                                                                                                     Murdock
                                                                                                                                                                                              9                                                                Manley
                                                                                                                                                                                                                                                                                         State Highway 1
                                                                                                                                                                                                         State Highway 1
                                                                    Waverly




                                                                                                                                                                              298th St
                                                                y
                                                          r   Hw                                                           Cass County Rural Water District #2                                                                                                             Weeping Water
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                                                                                                                                       1
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                                                                                                                                                                         Elmwood




                                                                                                                                                                                                                                                                                  144th St
                                                                                        7




                                                                                                                                       238th St




                                                                                                                                                                                   298th St
                                                                                                                                                                                                                                                                               Legend




                                                                                                                                                                                                                                                                                                     S 132nd St
                                                                                   2                                                                                                              O St
                                                                                        Eagle
                                                                                                                                                                                                                                                                                             City Limits

             O St                                                                                                                                                                                                                                                                            County Boundary
                                                                                                                                                                                                                                                                                                     Avoca
                                                                                                S 214th St




                                                                                                                                                                                                                                                                                             Rural Water Districts




                                                                                                                                                                                                                                                               N 30th Rd
                                                                                                                                                                                                                                                                                1.5           0.75                0   1.5 Miles




                                                                                                                                                                                                                                                                                                                                  CR2.2
Prepared By: JEO Consulting Group, Inc.
Source of Aerials and City Limits: NDNR
Software Used: ESRI ArcView 9.2 sp2

THIS MAP PREPARED USING INFORMATION FROM RECORD
DRAWINGS SUPPLIED BY JEO AND/OR OTHER APPLICABLE
                                                                                                                                 Cass County Rural Water District #2
CITY, COUNTY, STATE, FEDERAL OR PUBLIC OR PRIVATE ENTITIES.
JEO DOES NOT GUARANTEE THE ACCURACY OF THIS MAP OR
THE INFORMATION USED TO PREPARE THIS MAP.
                                                                                                                          - Lower Platte South NRD Hazard Mitigation Plan -
Created By: M Schwab, July 24, 2008
Contact Person: Jared Nelson
JEO Project Number: 385D23
                                                                                                                               Figure CR2.2: Critical Infrastructure Map
Participant Section for Cass County Rural Water District #2
Lower Platte South NRD Multi-Jurisdictional Hazard Mitigation Plan
November 2008
_________________________________________________________________________________________________

HAZARD HISTORICAL OCCURRENCES
Cass County Rural Water District #2 covers a large portion of Cass County and is not generally listed as the
specific location in which hazard events occur. For the purposes of this plan, historical occurrences for severe
winter storms, tornados, and severe thunderstorms mentioned are from the Cass County jurisdiction. No
occurrences in the NCDC reported damages affecting the Rural Water District.

The following sections provide historical occurrences, vulnerability assessment, potential losses and other
hazard specific information for Cass County. For a general background and description of each hazard see
Section 3: Risk Assessment. The majority of the following historical occurrences were taken from the Cass
County participant section.

SEVERE WINTER STORM

Historical Occurrences
Cass County Rural Water District #2 reports:
    • 2001: Lost electrical power due to a snowstorm caused a 50HP well motor to burn up at their well
        house on Fletcher Avenue.

The National Climatic Data Center (NCDC) recorded:
   • October 25, 1997: A major early season snowstorm struck a large area of southeast Nebraska. A
       heavy wet snowfall of six to 14 inches fell on trees, many of which were still fully or partially leafed,
       and caused extensive damage and/or total destruction. At least 205,000 residents in the affected area
       were without power just after the storm, many of the outages lasted for several days. Total damages
       for the affected area were $56.5 million in property damage and $1.6 million in crop damage.

No other historical occurrences in Cass County Rural Water District #2 were recorded by residents, village
officials, or found in any other document.

Potential Losses
Severe winter storms can knock out electrical service and have the capability to freeze pipes; potentially
interrupting delivery of water to district customers, including agricultural producers. Additionally, there is a
potential for frost heaving, which can also have ill affects on pipes. A devastating storm could cause over $1
million in damages if loss of livestock occurred from a major disruption in water service.

TORNADO AND HIGH WINDS

Historical Occurrences
No specific incidents were identified by Cass County Rural Water District #2 participants during the planning
process.

According to the previous Cass County Hazard Mitigation Plan, on the evening of July 24, 1993 five
damaging tornado touchdowns and numerous reports of damaging hail were reported. Damages incurred
totaled $1.6 million in DeWitt, but the worst damage occurred in Cass County at Lake WaConDa where over
40 homes were destroyed or damaged.

According to the NCDC, all of Cass County has experienced 32 instances of tornadic activity, ranging from a
funnel cloud to an F4 tornado. It should be noted that the magnitude of a tornado does not indicate nor is
directionally proportional to the damages incurred by it. Events within the County reported by the NCDC
with damages are as follows:


_________________________________________________________________________________________________
Cass County RWD #2 Participant Section                                                      CR2-7
Participant Section for Cass County Rural Water District #2
Lower Platte South NRD Multi-Jurisdictional Hazard Mitigation Plan
November 2008
_________________________________________________________________________________________________


    •   August 13, 1952: The first tornado recorded for the area was an F4 that caused $250,000 in property
        damage.

    •   July 28, 1956: An F1 tornado caused $3,000 in property damage.

    •   July 5, 1958: An F1 tornado caused $25,000 in property damage.

    •   May 1, 1983: An F1 tornado caused $250,000 in property damage.

    •   June 12, 1984: An F2 tornado caused $2.5 million in property damage.

No other historical occurrences in Cass County Rural Water District #2 were recorded by residents, village
officials, or found in any other document.

Potential Losses
A large scale tornado, such as an EF5, has the potential to devastate the above ground infrastructure owned by
the District as well as devastate homes and business served by the District. If a tornado were to take out a
water tower, the effects could be devastating, potentially leaving people, crops and livestock without water.
Therefore Cass County Rural Water District #2 could potentially receive over one million dollars in damages
in the worst case scenario. Additionally, there could be substantial loss of contents, loss associated with
displacement, functional downtime cost, economic loss, and loss of life, and injury.

SEVERE THUNDERSTORMS

Historical Occurrences
Cass County Rural Water District #2 recorded that a loss of power at water tower #1 caused a control pit to
flood thus ruining a radio control in 1994.

NCDC recorded 212 thunderstorms in Cass County. Of the recorded storms, three reported injuries, and one a
fatality.

    •   July 18, 1985: Severe thunderstorm winds injured five people. No property damage was recorded.

    •   June 2, 1989: Thunderstorm winds with a magnitude of 52 knots. It injured one person. There was no
        property damage reported.

    •   July 4, 1994: Strong winds blew down a 100 foot tall cottonwood tree. The two to three feet diameter
        upper limbs hit a tent that two people were camping in. A 58 year old male was killed and a 31 year
        old female was injured.

No other historical occurrences in Cass County Rural Water District #2 were recorded by residents, village
officials, or found in any other document.

Potential Losses
Severe thunderstorms occur on an irregular basis with varying magnitudes and can cause a wide degree of
damages that can range from a few downed limbs to wide spread tree loss, hail damage, and damage to
property. Based upon the historical occurrences, Cass County’s worst event included two deaths, however,
severe thunderstorms also have a potential to cause great monetary loss. A major event could reach hundreds


_________________________________________________________________________________________________
Cass County RWD #2 Participant Section                                                      CR2-8
Participant Section for Cass County Rural Water District #2
Lower Platte South NRD Multi-Jurisdictional Hazard Mitigation Plan
November 2008
_________________________________________________________________________________________________

of thousands of dollars in damages throughout the entire District. If a thunderstorm were to cause a power
outage, the effects could be severe, potentially leaving people, crops and livestock without water.
Additionally, there could be losses due to displacement, functional downtime, as well as injury and loss of
life.

FLOODING

Historical Occurrences
According to Cass County Rural Water District #2 staff:

   •   Flooding has washed out water mains at 250th and Waverly Road; south of Alvo Road and 226th; west
       of 226yh and A Street; east of 310th and Fletcher; south of B Road and 16th Road; and east of 214th
       and Adams. One event occurred in 1988 and 1993, three others occurred in 1994.

The previous Cass County Hazard Mitigation Plan reports the following. Although not all areas are within
Cass County RWD #1, they are nearby in southeastern Nebraska:

   •   According to the Cass County Hazard Mitigation Plan, floods have routinely occurred along the
       Missouri River, Platte River, Weeping Water Creek, (including the Main Stem, North Branch and
       South Branch), Stove Creek, Salt Creek, Greenwood Creek, Mill Creek, Cedar Creek, Turkey Creek
       and others.

   •   During June and July of 1993, record high river stages were set on the Missouri River at Plattsmouth
       and Brownville. On July 23, extreme flooding continued in Weeping Water and Union. Papillion
       Creek near Bellevue was two feet above flood stage while Little Salt Creek near Lincoln crested over
       four feet above flood stage. Flash flooding was reported in Cass, Lancaster, Saunders, Otoe,
       Richardson and Nemaha Counties. Many low-lying areas along the Lower Platte River were
       evacuated. Many county roads in the Eastern one-third of Nebraska were closed. American Red Cross
       opened two shelters in Cass County for disaster actions.

The ARC reported:

   •   42 single-family residences, 90 mobile homes, and three multi-family dwellings were destroyed. In
       Cass County these losses included one death, four injuries, 600 persons evacuated to two shelters and
       private homes, 50 housing units destroyed, 20 mobile homes destroyed, another 205 units and mobile
       homes damaged to some extent and damages in these categories of $2,940,000. In addition there was
       one business destroyed and three damaged for a total of $840,000.

There were 17 floods reported since May 23, 1996 by the NCDC website. The total monetary damage was
over $1 million. The flood that occurred on February 18, 1997 incurred $620,000 in damages, and was a
cross-county event.

No other historical occurrences in Cass County Rural Water District #2 were recorded by residents, village
officials, or found in any other document.

Vulnerability Assessment
Flooding can be devastating to the underground infrastructure owned by the district as it can result in
washouts. This can either completely expose pipes or bring them closer to the surface, exposing them to the
cold, thus making them vulnerable to freezing.


_________________________________________________________________________________________________
Cass County RWD #2 Participant Section                                                      CR2-9
Participant Section for Cass County Rural Water District #2
Lower Platte South NRD Multi-Jurisdictional Hazard Mitigation Plan
November 2008
_________________________________________________________________________________________________


Due to data limitations, specific infrastructure that is vulnerable to flooding was not assessed for this District.
This could be completed in future updates.

Potential Losses
Figure CR2.3 shows the areas in Cass County Rural Water District #2 that could potentially be affected by
flooding. Due to limited resources, the potential losses in Cass County Rural Water District #2 were not
determined for this plan.




_________________________________________________________________________________________________
Cass County RWD #2 Participant Section                                                     CR2-10
State Highway 66

                                                                                                                                                             0                                         South Bend                                                        Louisville
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                                                                                                                                                                                                                                                             State Highway 50
                                                                                                                                                                                   Murdock
                                                                                                                                                                                                                                                                                Manley
                                                                                                                                                                                                                                                                                                          State Highway 1
                                                                                                                                                                                                         State Highway 1
                                                                       Waverly




                                                                                                                                                                            298th St
                                                                                                                                                                                                                                                                                                                       Iowa
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                                                             r   Hw                                                      Cass County Rural Water District #2                                                                                                                                Weeping Water
                                                         e
                                                  u   sk                                                                         Alvo
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                                      Co




                                                                                                                                                                       Elmwood




                                                                                                                                                                                                                                                                                                   144th St
                                                                                                                                     238th St




                                                                                                                                                                                 298th St
                                                                                                                                                                                                                                                                                                Legend




                                                                                                                                                                                                                                                                                                                       S 132nd St
                                                                                                                                                                                                  O St
                                                                                         Eagle
                                                                                                                                                                                                                                                                                                              City Limits

             O St                                                                                                                                                                                                                                                                                             Estimated100-Year
                                                                                                                                                                                                                                                                                                                      Avoca
                                                                                                                                                                                                                                                                                                              Floodplain Boundary*
                                                                                                  S 214th St




                                                                                                                                                                                                                                                                                N 30th Rd
                                                                                                                                                                                              *100-Year Flood Boundary is in the revision process by FEMA and is
                                                                                                                                                                                              considered "Draft". The FEMA MapMod database, as of Jan 17,2008,
                                                                                                                                                                                                                                                                                                 1.5           0.75                 0    1.5 Miles
                                                                                                                                                                                            indicates this floodplain as in the "Technical Review" stage. Floodplain
                                                                                                                                                                                                data provided by the Nebraska Department of Natural Resources.




                                                                                                                                                                                                                                                                                                                                                     CR2.3
Prepared By: JEO Consulting Group, Inc.
Source of Aerials and City Limits: NDNR
Software Used: ESRI ArcView 9.2 sp2

THIS MAP PREPARED USING INFORMATION FROM RECORD
DRAWINGS SUPPLIED BY JEO AND/OR OTHER APPLICABLE
                                                                                                                              Cass County Rural Water District #2
CITY, COUNTY, STATE, FEDERAL OR PUBLIC OR PRIVATE ENTITIES.
JEO DOES NOT GUARANTEE THE ACCURACY OF THIS MAP OR
THE INFORMATION USED TO PREPARE THIS MAP.
                                                                                                                        - Lower Platte South NRD Hazard Mitigation Plan -
Created By: M Schwab, July 17, 2008
Contact Person: Jared Nelson
JEO Project Number: 385D23
                                                                                                                             Figure CR2.3: 100-Year Floodplain Map
Lower Platte South NRD Multi-Jurisdictional Hazard Mitigation Plan
November 2008
_________________________________________________________________________________________________

DAM FAILURE

Historical Occurrences
There are no records of dam failure in Cass County Rural Water District #2.

Vulnerability Assessment
According to the NDNR dam database, zero high hazard dams are located in Cass County Rural Water
District #2.

Figure CR2.8 shows the Low and Significant Hazard Dams of Cass County Rural Water District #2. There
are no high hazard dams in this jurisdiction.

All dams are inspected on a regular basis and after extreme conditions have occurred. If problems are found
during an inspection, the proper course of action is taken to ensure the structural integrity of the dam is
preserved. In the event that dam failure is imminent, the Emergency Action Plan (EAP) for the dam governs
the course of action.

The assessment of dam failure to rural areas of the County was not completed due to data limitations. This
could be done at future updates of the plan.

Potential Losses
The potential losses of dam failure are discussed in the participant sections of each community that lies within
Cass County. The potential losses from flooding that could occur from a dam failure are discussed in the
flooding section.




_________________________________________________________________________________________________
Cass County RWD #2 Participant Section                                                     CR2-12
South Bend   Louisville

                                                                                                                                                                                               NE02399




                                                                                        Greenwood




                                                                                                                                                                Murdock
                                                                                                                                                                                        Manley


                                                                        Waverly                                                                                                                                             Iowa



                                                                                                                                                                                                    Weeping Water
                                                                                                                  Cass County Rural Water District #2




                                                                                                                                                           Elmwood




                                                              NE02837
                                                                              NE02757               Eagle

                             NE00527
                                                                                                                                                                                                                    Avoca
      Legend
                 High Hazard Dam
                Significant Hazard Dam
                Low Hazard Dam
                 100 Year Floodplain

                 City Limits


  1            0.5           0                  1 Miles
NE01061


Prepared By: JEO Consulting Group, Inc.




                                                                                                                                                                                                                                   CR2.4
Source of Aerials and City Limits: NDNR
Software Used: ESRI ArcView 9.2 sp2

THIS MAP PREPARED USING INFORMATION FROM RECORD
DRAWINGS SUPPLIED BY JEO AND/OR OTHER APPLICABLE
                                                                                                                  Cass County Rural Water District #2
CITY, COUNTY, STATE, FEDERAL OR PUBLIC OR PRIVATE ENTITIES.
JEO DOES NOT GUARANTEE THE ACCURACY OF THIS MAP OR
THE INFORMATION USED TO PREPARE THIS MAP.
                                                                                                            - Lower Platte South NRD Hazard Mitigation Plan -
Created By: M. Schwab, July 17, 2008
Contact Person: Jared Nelson
                                                                                                                    Figure CR2.4: Dam Location Map
JEO Project Number: 385D23
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