Participant Section for Cass County Rural Water District #2
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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
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
Saunders
County Sarpy State Highway 66
South Bend County
0 Louisville
I-8
6
0
I-8
ay
g hw
238th St
Hi
es
at
St
d
te
i
Un
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
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
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
Critical Facility Number Critical Facility
1 Water Tower #1 - Alvo
State Highway 66
South Bend 2 Water Tower #1 - Eagle
Louisville
0
I-8
6
3 Well #4
ay
0
I-8
hw
4 Well #1
g
Hi
238th St
5 Well #2
es
at
6 Well #3
St
d
7 Booster Station
te
i
Un
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
ke
us 4 5 6 Alvo
r nh 3
Co
1
10
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
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
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
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
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
I-8
6
ay
0
I-8
g hw
Hi
238th St
es
at
St
d
i te
Un
Greenwood
State Highway 50
Murdock
Manley
State Highway 1
State Highway 1
Waverly
298th St
Iowa
y
r Hw Cass County Rural Water District #2 Weeping Water
e
u sk Alvo
r nh
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 MapLower 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: 385D23You can also read
