East Fork Fire Protection District Serving as Douglas County Emergency Management Under an Inter-local Contract Carson River Flood Event Planning Project
Carson Valley Flood Event Planning Project 1
East Fork Fire Protection District
Carson River Flood Event Planning Project
Executive Summary Prepared by Tod F. Carlini, District Fire Chief
The East Fork Fire Protection District is charged with the responsibilities of Emergency Management for Douglas County, Nevada under an inter-local agreement between the Fire Protection District and Douglas County.
While there are many uncertainties regarding the potential of flooding along the Carson River in Douglas County and an El Nino driven weather situation which could produce abnormal potential for that flooding, including alluvial, riverine, and debris type flooding, the East Fork Fire Protection District has taken a lead role in the development of flood orientated contingency and response planning.
Douglas County has experienced all three types of flood events. Some with devastating results, such as was the case with the 1997 flood event. Most recently, the Johnson and Stephanie Lane community areas were heavily impacted with alluvial flooding following heavy rainfall in the Pine Nut Mountain Range, while the Fish Springs area actually saw debris/mudflow flooding in July of 2014. Debris from the 24,000 acre Bison Fire of 2013 contributed to this type of event. While not to deminimize the effects of flash flooding on the citizens and properties impacted by alluvial flooding, the attached work product and information gathering will focus primarily on the potential for riverine flooding, specifically along the East and West Forks of the Carson River as it flows through the Carson Valley. Consideration must also be made for a debris/mud flow type event due to the impacts of the 2015 Washington Fire in Alpine County. The information contained herein has been prepared from an emergency management perspective and represents the first phase of a two phase effort. As we attempted to design a functional Flood Response Guide, one of the first steps to assess the condition of the Carson River and evaluate conditions and hazardous, which under a flood situations, would either need to be addressed or at a minimum be identified as a concern. In meeting that objective our desire was to collect information from a core group of individuals, all with interests in the Carson River. Solicitations were made regarding concerns, problematic features, known weaknesses, and possible solutions more from a “practical” point of view, rather than from any type of specific engineering perspective. While
Carson Valley Flood Event Planning Project 2
environmental considerations are an absolute necessity when addressing any issues along a navigable water course, such as the Carson River, the primary focus was in terms of what potentially could be done as emergency measures and/or assess flood potential necessary for the development of a separate Flood Emergency Guide Manual. The 1997 Flood resulted in one fatality, forced the closure of much business, flooded over 50 homes throughout the valley, forced the evacuation of 140 citizens, isolated many of the valleys communities, destroyed millions of dollars of public infrastructure, and resulted in a total loss of $55,000,000. Several years of drought have left the Carson River chocked with new growth vegetation, sand and gravel islands and other deposits, and an overall loss of river channel capacity. The flood of 1997 saw flows of 23,000 CFS, which is 4 feet above flood stage. The information contained within this document and the recommendations made, are the by-product of conversations and discussions with what should be considered one of Carson Valley’s most important resources, that being its agricultural community and the interest and history that it represents. This work would not have been possible without collaborating with members from the agricultural community, the Washoe Tribe of Nevada and California, and other interests along the Carson River and Carson Valley. The primary objectives for the Fire Protection District are actually quite clear and will serve as a basis for the development of the Flood Response Guide which is a separate document, however, understanding these objectives as part of this project is important: They include:
Reduce the loss of life and property of residents and visitors due to flooding through response coordination and mitigation actions
Ensure the safety of all responders and participants in the response Support the residents, visitors, and businesses in prepare for, responding to and recovering from flooding Provide an efficient, comprehensive organizational structure for emergency response and recovery Coordinate ALL emergency operations within the county either with or without an official declaration Coordinate the use of available resources, be they public or private, including, local, state, and federal Recover from flood emergencies by providing for rapid and orderly damage assessment and providing necessary assistance to
the highest degree Establish a tiered activation of response levels following a deliberate and reliable situational awareness and input data from
credible sources
Carson Valley Flood Event Planning Project 3
Apply institutional knowledge, historical recollection, and recognize the roll that the agricultural community can plan in flood management in the Carson Valley
Secondary and complimentary to the development of a Flood Response Guide, this is also an attempt to document notes, comments, historical perspective, and to define and prioritize potential emergency project work along the Carson River. While the scope and responsibility of that work is vested with others, and strictly from an Emergency Management standpoint, this work may serve as a starting point for Carson Valley Conservation District, engineering disciplines, environmental specialist, and regulatory agencies in the future.
The executive management of the East Fork Fire Protection District would like to thank those members of the Carson Valley agricultural community and representatives from the Washoe Tribe of Nevada and California who participated in this endeavor.
Basic History
The Carson River is a northwestern Nevada river that empties into the Carson Sink, an endorheic basin. The main stem of the river is 131 miles (211 km) long although addition of the East Fork makes the total length 205 miles traversing five counties: Alpine County in California and Douglas, Storey, Lyon, and Churchill Counties in Nevada, as well as the Consolidated Municipality of Carson City, Nevada. The river is named for Kit Carson, who guided John C. Frémont's expedition westward up the Carson Valley and across Carson Pass in winter, 1844.
The 205 mile Carson River watershed encompasses 3,966 square miles and includes two major forks in the Sierra Nevada in its upper watershed region. The 74-mile-long East Fork rises on the north slopes of Sonora Peak (just north of Sonora Pass at about 10,400 feet in southern Alpine County, southeast of Markleeville in the Carson-Iceberg Wilderness. The 40-mile-long West Fork rises in the Sierras near Carson Pass and Lost Lakes at 9,000 feet elevation and flows northeast into Nevada, joining the East Fork about 1 mile southeast of Genoa. The Carson River then flows north 18 miles to the end of the upper watershed at Mexican Dam just southeast of Carson City. In the middle watershed the river runs generally northeast from Carson City across Lyon County, past Dayton. The middle watershed ends in eastern Churchill County at the Lahontan Dam. Here river flows are augmented by water from the Truckee River and stored in the Lake Lahontan reservoir. Downstream from the dam (in the lower watershed) much of the water is used for irrigation in the vicinity of Fallon, with limited flows continuing northeast into the Carson Sink.
Clear Creek, which begins at about 8,780 feet on Snow Valley Peak (Toiyabe National Forest, Carson Range) west of Carson City, is the only perennial tributary of the Carson River main stem, and is protected by the Nature Conservancy.
Carson Valley Flood Event Planning Project 4
Flood Types
There are actually three types of flooding that can impact Douglas County. They include main stem riverine flooding, alluvial fan flooding, and debris flow/mud flow flooding. Douglas County most recently experienced alluvial fan flooding and debris flow/mudflow flooding on the eastern side of the Carson Valley and in Southern Douglas County.
Main Stem Flooding Flooding of the main channel of a river involves flows that overbank and flood adjacent areas known as floodplains. A floodplain is generally described as a strip of relatively smooth land bordering a river that overflows at time of high water. Specific geomorphic features define a floodplain. For example, the Carson Valley is broad and flat due to the uplift and subsequent erosion of the Sierra Nevada, Carson, and Pine Nut Ranges as well as deposition of sediment carried by the Carson River at flood stage. Likewise, the Carson River channel looks more like a creek bed rather than a deep incised channel found in larger rivers across the Nation. Because the source of most of the stream flow originates from the mountain snowpack, the Carson River has not needed to incise its channel to accommodate snowmelt runoff but simply uses the floodplain as a discharge surface.
Alluvial Fan Flooding Alluvial-fan flooding occurs on alluvial-fan surfaces adjacent to the mountain block which are gently sloping; fan-shaped landforms created over time by deposition of eroded sediment, and are common at the base of mountain ranges in arid and semiarid regions such as much of the western United States (National Research Council, 1996). Flooding on alluvial fans is characterized by high-velocity flows, active processes of erosion, sediment transport and deposition, and unpredictable flow paths. This type of flooding is the result of intense cloudbursts from summer convective storms — common in Nevada.
Debris/Mudflow Flooding Unlike water flows where suspended sediment is insufficient to affect how water behaves, debris flows are characterized by a mixture of sediment and water where the flow becomes slurry similar to wet concrete. In steep canyons, debris flows can achieve high velocities (the rate of flow), transport large boulders in suspension, and cause catastrophic damage from impact or burial.
Carson Valley Flood Event Planning Project 5
Data Collection and Methodology While we are very well aware of the potential impacts of alluvial fan flooding, our efforts with data collection were focused on main stem or riverine flooding. Our approach was rather straight forward in the application of local and historical knowledge, observed river system conditions, and the most recent aerial photography. Participants were asked to discuss and identify issues and elements along the course of both the East and West Forks of the Carson River and their eventual convergent into one riverbed and flow. The scope of this work included points from the former Power Dam area on the East Fork, the Douglas County/Alpine County line of the West Fork to just beyond the Craddlebaugh Bridge as the river passes under U.S. Highway 395 in northern Douglas County. Once the information was collected, maps were produced which identified by number the particular issue or element of focus. Those items were then classified for planning, risk and hazard, and potential project work. Priority attention was also suggested specifically from an emergency management perspective or from group consensus on what should be considered and addressed as soon as possible.
The area being considered was divided into nine geographic areas with the following map reference titles supported by a map reference key. They include:
East Fork Dresslerville Riverview
Waterloo Minden Genoa
Carson Autumn Hills Foothill
Results and recommendations were then distributed amongst three categories. They included the flowing:
Project (Yellow): A project for the purposes of this document included areas or points within the river or associated ditch system(s) that have either been previously identified as potential projects or newly identified as potential projects. The “projects” listed have also be prioritized based upon risk vs. benefit analysis as they relate to the potential negative impacts if a significant flood event were to occur and impact critical infrastructure, life, and property.
As an example for an area or point defined as a “Project,” the picture to the left shows the existing condition were the Virginia Ditch crosses beneath U.S. Highway 395, south of Gardnerville, Nevada. Opinion, consensus, and historical data all support the installation of a gate device of some type at this location to prevent river overflow conditions which “charge” the Virginia Ditch causing flows to pass under the highway and threaten Carson Valley Medical Center and long term care facilities on the east side of the highway.
Carson Valley Flood Event Planning Project 6
Hazard (Red): A Hazard area or point for the purposes of this document includes those locations along the river system which either currently or could with an event create a significant hazard and have the potential for increasing the threat to life, property, and critical infrastructure.
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As an example for an area or point defined as a “Hazard,” the picture to the right shows one of the most significant concerns, i.e. snags and debris. While the Carson Valley Conservation Districts has made significant progress in this area, much more work is required. Snags and debris of this nature, under flood conditions, create significant hazards as they are carried down river and impact several bridge and crossing locations on both forks of the river. The removal and /or size reduction is a critical measure that can reduce the hazard to a high degree.
As another example for an area or point defined as a “Hazard,” the picture to the left shows another concern, i.e. sand and gravel bars. Additional consideration must be made to remove sand and gravel bars and new growth vegetation in some cases, which have significantly reduced the river channel capacities to volumes less than those prior to the 1997 Flood Event
Carson Valley Flood Event Planning Project 7
Mitigation (Blue): A Mitigation area or point for the purposes of this document includes those locations along the river system where a more deliberate approach may be taken to correct or otherwise “mitigate” a condition which under flood status could contribute to additional flood related issues.
Special Consideration It is important to note that all three classifications used to define potential concerns along the East and West Forks of the Carson River and the confluence of those two branches into the Carson River each present very specific challenges, those noted as “Mitigation” also take into account environmental considerations. This is not to say that those listed as a “Hazard” or as a “Project” don’t have environmental or in some cases cultural considerations. They do, but once again, this document is prepared from an Emergency Management standpoint, where by the ability to address those areas as soon as possible will potentially have or create significant benefits which in turn may reduce the threat to life, property and critical infrastructure.
The East Fork Fire Protection District encourages the immediate collaboration with the Carson Valley Water Sub-Conservancy, the Nevada Department and Environmental Protection, United States Army Corp of Engineers, the Washoe Tribe of Nevada and California, and other environmental groups with either specific authority or interest in the Carson River’s ecosystem and culture. The Carson River is one of the most important natural resources which must be protected and maintained. The work that appears to be
As an example for an area or point defined as a “Mitigation,” the picture to the right shows area where rock and gravel bars have developed along with new growth vegetation. In some cases, these areas allow for the redirection of the river course and bank erosion Bank reconstruction, stabilization, and replanting of appropriate vegetation all can assist with flood mitigation and contribute to a “healthy” river ecosystem.
Carson Valley Flood Event Planning Project 8
necessary related to riverine flood management needs to be pursued. In some cases the work required or recommended needs to be completed without delay. In other cases, a much more deliberate approach is recommended. Even in those cases where immediate attention is needed, opportunity to revisit “emergency actions and measures” should be provided to address any future environmental or ecological issues that may result due to the emergency actions taken.
Results and Recommendations 49 issues, areas of concern, hazards, and/or potential project work were identified. Following is that list which is supported by the attached corresponding maps.
MAP POINT
MAP AREA ELELMENT/ISSUE IDENTIFIED ELEMENT TYPE PRIORITY
1 East Fork Install Flood Gauge Device at Bridge Project Moderate
2 East Fork Sand and gravel bar removal Mitigation
3 East Fork Contact USGS and request activation of gauge device Project High
4 East Fork Potential Breach Point Hazard
5 East Fork Drainage Capacity Issue at Smelter Creek and US 395 - Possible overflow point
Hazard
6 Riverview Potential Breach Point Hazard
7 East Fork Potential Breach Point Hazard
8 Riverview Possible Dike Construction Site Project High
9 Riverview Public Utility Threat – Power and Communications Hazard
10 Riverview River bank erosion. River course/bank reestablishment/reinforcement. Washoe Tribal Land protection
Mitigation
Carson Valley Flood Event Planning Project 9
11 Riverview River bank erosion. River course/bank reinforcement, clearing and snagging area. Washoe Tribal Land protection
Project Extremely High
12 Riverview River bank erosion. River course/bank reinforcement, clearing and snagging area. Washoe Tribal Land protection
Project Extremely High
13 Riverview River bank erosion. River course/bank reinforcement, clearing and snagging area. Washoe Tribal Land protection
Project Extremely High
14 Riverview River bank erosion. River course/bank reinforcement, clearing and snagging area. Washoe Tribal Land protection
Project Extremely High
15 Riverview Possible Breach Point Hazard
16 Riverview Possible Culvert Capacity/Overflow Point Hazard
17 Riverview Possible Culvert Capacity/Overflow Point Project Extremely High
18 Riverview Possible Culvert Capacity/Overflow Point Hazard
19 Riverview Soft plug location- Riverview Bridge Hazard
20 Riverview Drainage Point back to River Mitigation
21 Riverview Company Ditch - Open Draining access to east side of U.S.395 Project Extremely High
22 Riverview Inundation area with entrapment (mud) potential Hazard
23 Riverview Bank Erosion – Bank Stabilization/Restoration Mitigation
24 Riverview Bank Erosion / Stabilization/Restoration Mitigation
25 Riverview Possible Capacity Issue Hazard
26 Riverview Possible Choke Point Hazard
Carson Valley Flood Event Planning Project 10
27 Riverview Possible Choke Point – Restricted Under Bridge Clearance – Under bridge clearing
Project High
28 Riverview Possible Isolated Critical Infrastructure – Community Center/Evacuation Center
Hazard
29 Minden Choke Point Hazard
30 Minden Inundation area with large population potential Hazard
31 Minden Channel clearing and snagging Project High
32 Minden Choke Point Hazard
33 Minden Possible Flow Capacity Issue/Overflow and Isolation Hazard
34 Minden Channel Clearing and Vegetation Removal Project High
35 Minden Channel Clearing and Vegetation Removal Project High
36 Foothill Evaluate Diversion Structure Mitigation
37 Autumn Hills Breach Point – Water over Roadway – Possible Isolation Point Hazard
38 Autumn Hills Choke Point Hazard
39 Autumn Hills Beaver Dam – Flow Restriction Mitigation
40 Autumn Hills Possible Culvert Capacity – Overflow Hazard
41 Foothill Possible under bridge capacity – Under bridge clearing Hazard
42 Autumn Hills Breach Point with spill out Hazard
43 Autumn Hills Breach Point with spill out Hazard
44 Autumn Hills Beaver Dam – Flow Restriction Mitigation
45 Genoa Beaver Dam – Flow Restriction Mitigation
Carson Valley Flood Event Planning Project 11
46 Genoa Breach Point/Overflow/ Possible Isolation Condition Hazard
47 Genoa Breach Point/Overflow/ Possible Isolation Condition Hazard
48 Genoa Mountain Run Off – Road Wash out potential Hazard
49 Carson 395 Possible Overflow – US 395 – Access and Isolation Condition Hazard
Final Acknowledgment The East Fork Fire Protection District and Douglas County Emergency Management would like to acknowledge the following individuals for their invaluable contributions to this effort. Without their participation, knowledge, historical perspective, and most importantly, their passion and appreciation for the agricultural interest of the Carson Valley and the important part that the Carson River plays, this work product would not have been possible.
Contributing Individuals:
Andy Aldax Brett Reed Brian Crocket Brian Parks Charlie Condron
Charlie Hone Clarence Burr Craig Burnside Dave Doughty Peter Knight
Eric Rieman Gary Aiazzi J.B. Lekumberry James Settelmeyer Mark Neddenrip
Frank Godecke Tom Brooks Bob Chichester Stan Smokey Fred Stodieck
Julian LaRoy
Washoe Tribe of Nevada and California
Neal Mortimore, Tribal Chairman Norm Harry, Environmental Program Director
Carson Valley Conservation District
Mike Hays, Coordinator
Carson Water Sub Conservancy District
Ed James, Director
Carson Valley Flood Event Planning Project 12
Douglas County
Greg Lynn, Commissioner Steve Thaler, Commissioner
East Fork Fire Protection District
Tod F. Carlini, District Fire Chief Steve Eisele, Deputy Fire Chief
Douglas County GIS
Eric Schmidt, GIS Manager Matt Richardson, GIS Technician
Funding
This project was funding under a Planning Grant from the Nevada Division of Emergency Management and by the East Fork Fire Protection District.
For Additional Information:
East Fork Fire Protection District 1694 County Road Minden, Nevada 89423 775-782-9040 Carson Valley Conservation District 1702 County Road – Suite A Minden, Nevada 89423 775-782-3661 Washoe Tribe of Nevada and California 919 U.S. Highway 395 South Gardnerville, Nevada 89410 775-265-8682
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STEPHANIE WY
KIMMERLING RD
JOHNSON LN
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Carson395
Genoa
Foothill Minden
AutumnHills Waterloo
Riverview
Dresslerville EastFork
.0 16,0008,000
Feet
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PALOMINO LN
STAG
ECOA
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PINTO CI
RIVER RD
N HWY 395
MAIN RIVER
RD/WATASHEAMU
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unnamed
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DARK
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MEGA
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CHUKAR LN
WISEMAN LN
HACKAMORE LN
MULE LN
unnamed
RIVER
ROCK
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ROCK BOTTOM RD
ENER
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SUBSTATION DR
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EFFPDSTATION 10
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3
4
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Esri, USDA Farm Service Agency
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Ditches NBMG '97 Flood Extents
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priva
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WEST
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unnamed
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WY
unn
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priva
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ARTEMESIA LN
LEWA
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DRESSLER LN
ORO WY
private
HERITAGE LN
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FAIRVIEW LN
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PINENUT RD
ANNW
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KYNDAL WY
FISH SPRINGS RD
WILSONCI
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DEERR UN
RD/MEMDEWEE RUN
SUG AR MAPLE AV
KINGSTON WY
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KYND
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DORA DR
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unnamed
RIVERVIEW DR
WYATTLN
SCARLET
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CARDINAL CT
PIT RD
ASHLEYCT
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BALTICAVE
MUIR DR
CARD
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WATERLOO LN
STODICK PY
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WINWOOD WY
NORD CI
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CABERNET CT
KITTYHAWK AV
ARLENLN
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CEDAR BROOKCT
BIRDI
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SHASTA DR
KITTYHAWK AV
SOUTHGATEDR
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MOUNTAINWY/D
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BOWL
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ANGORADR
SORENSEN LN
ORCHARD RD
HELMAN DR
JAMES RD
priva
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LONG
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LARSON WY
SUNB
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MARKCI
CROCKETT LN
GRANT AV
ADDL
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SAW M
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CAMAS CT
LOU CT
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TOPAZ LN
GLENWOOD DR
LANGLEY DRPOLLEN CT
BUTLER CT
BREN
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JOBS PEAK DR
BROOKE WY
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JODI CT
BOY
ST/M
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LINDA
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MORN
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EAST
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REDHAWK LN
ANTARES
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BITTERBRUSH CT
KERRY LN
MULLERPY
HONEYBEE LN
ROBINDR
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BANNER DR
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FALSTAFF LN
FIFTHGREENCT
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GODECKE LNST
ONEG
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LADERA LN
JO LN
WESTMINSTERPL
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DRURY LN
SUBSTATION DR
TIMBER CT
SOLITUDE LN
ANNKIM CI
SILVERANCH DR
S ORCHARD RD
PINENUT CT
DEAN
DR
WENNHOLD LN
CENTER VILLEL N
ELGE
S AV
DRES
SLER
VILLE
RD
TILLM
AN LN
N MARION RU
SSEL
L DR
KINGS LA NE
SERVICE DR
MULLERPY
MULLER PY
PIN OAK DR
KIMMERLING RD
KIMMERLING RD
LASS
EN W
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EAST
VALL
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D
BUM BLEBE E D R
TOIYABE AV
BLUEROCK RD
SHOR
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WHEELER WY
FAIRW
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MAMMOTH WY
HORNET DR
HORNET DR
WINDSOR DR
MERINO
CI
GOLDENEA GLECT
MITC
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RITTER DR
BOLIVIA WY
WHITN
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MAIN RIVER RD/WATASHEAMU
AS PEN
BRO OKLN
CHOKECHERRYCT
EAST
PEAK
LN
ALICIACI
LONG CT
PENN LN
CAHICI
VILL AGE WY
MEADOWVIEWRD
INDUSTRIAL WY
WILL
OWCR
EEK L
N
WAGON DR
PURPLESAGE DR
SCOTI LN
SUNSET CT
PALISADE CI
SELKIRK CI
SANCHEZ RD
MA
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M AR K CI
DECK
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MARLETTE CI
MARLETTE CI
WILLOW
CREEK LN
Allerm
an Ca
nal
Allerm
an Ca
nal
Smelter Creek
Virginia Canal
Virgin
iaCa
nal
Upper Allerman Canal Runoff
Runoff
Rocky Slough
Pipeline
Pipeline
Pipeline
MartinSlough
Lowe
r Alle
rman
Can
al
LampeDitch Irrigation
Pipeline
IrrigationPipeline
IrrigationPipeline
Irriga
tion
Pipelin
e
IrrigationPipeline
IrrigationPipeline
Hyflye
r Ditch
Henningsen Slough
Ezell
Ditch
Edna Ditch
Edna Ditch
Diversion
Diversion
Detentio
n Pond
Detention Pond
DetentionPond
CottonwoodSlough
Cottonwood Slough
Company
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Company Ditch
CRiver
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Buck
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iversi
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itch
PAU-WA-LUMIDDLE SCH
SCARSELLIELEM SCH
LAMPEPARK
RANCHOSASPEN PARK
UNR AG EXTENSION
GARDNERVILLETOWN WATER
TOWN OFGARDNERVILLEOFFICE
TOWN OF GARDNERVILLEOFFICE
DC WEEDCONTROL
DC PARKS& REC
DC SHERIFFSUBSTATION
STODICKPARK
EFFPDSTATION 7
CC MENELEYELEM SCH
WASHOE TRIBEMEDICALCENTER
SENIORCITIZENSCENTER
POST OFFICE -GARDNERVILLE
CARSON VALLEYMEDICALCENTER
15
27
4
5
7
9
10
11
1213 14
15
16
17
18
1920
21
22
2324
25
26
27
28
8
Esri, USDA Farm Service Agency
. 0 4,1002,050
FeetRiverviewLegend
Ditches NBMG '97 Flood Extents
!
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!
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DOUGLAS AV
TRANCE ACRE DR
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COURTHOUSE ST
COBB
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BWIRE
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KIMMERLING RD
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CUTTER WY
SORENSEN LN
ROJO
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MAPLE ST
TOPAZ LN
RUBIO WY
KINGS
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RUBIO
WY
MILLCREEKCI
MARI
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WATERLOO LN
DRAY
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CAP L
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AMARILLO DR
WENNHOLD LN
RANCH DR
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WILH
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MOTTSVILLE LN
priva
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DUCK POND RD
WATERLOO LN
CENTERVILLE
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KINGSTON LN
RUBIO
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ROCKY TERRACE DR
BOLIVIA WY
BIGJAKECT
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WCOTTAG E
LP
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MARR ION WY
drive
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COUN
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ASPEN LPdriv ewa y
West
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West Fork CRiver
Stodie
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Rocky Slough
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Rocky Slough
Rock
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Rock Diversion
RockDiversion
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Lund Ditch
Island Ditch
Irriga
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Pipelin
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IrrigationPipeline
IrrigationPipeline
Irrigation Pipeline
Home Slough
Henningsen Slough
HenningsenSlough Henningsen Slough
Edna
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Edna Ditch
Dryer pipeline
Dryerpipeline
DryerDitch
Divers
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DetentionPond
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Cottonwood Slough
Cottonwood SloughCottonwood Slough
Cottonwood Slough
Cottonwood Slough
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CRiver
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EFFPDSTATION 2
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DC SHERIFFSUBSTATION
GARDNERVILLETOWN PARK
SENIOR CITIZENS CENTER
POST OFFICE -GARDNERVILLE RANCH
27
31
2630
3132
37
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Esri, USDA Farm Service Agency
. 0 4,1002,050
FeetWaterlooLegend
Ditches NBMG '97 Flood Extents
!
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AUT U
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CENTERVILLE LN
FRICKECT
CLAIRECT
SHERIDAN LN
DRESDEN LN
DINO CT
EVA CT
BUENAVISTA CT
PLUM CT
FORESTVIEWDR
RUSSELLWY
DINA CT
JONES LN
LILLIAN CT
NICHO
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PEACH CT
OLDFOOTHILL RD
ALEXCT
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JOBE CT
TYCOON CT
CORIECT
MERLYN CT
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PHILLIPS WY
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MOTTSVILLE LNPEPI'S DR
DIORITE RD
MOUNTAINREACH CT
MARSHA LN
TAYL
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GEO R
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CUTTIN-LOOSE LN
IRMA LN
JONES
RANCH
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SUMM ER HILLS RD
BARBER WY
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RD
ALLERMAN LN
WILFREDWY
ARTEMESIA LN
DUCK POND RD
BASS WY
SIERRA COUNTRY CI
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FOOTHILL RD
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Big Ditch
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Runoff
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Runoff
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Runoff
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MottsCreek
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Johnson Slough
Johnson Slough
Jobs Creek
Detention
PondDetention
Pond
DetentionPond
Detention
PondDetention
Pond
Detention Pond
Brockliss Slough
Brockliss Slough
Broc
kliss
Slou
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Brockliss Slough
EFFPDSTATION 8
38
39
40
41
424344
38
Esri, USDA Farm Service Agency
. 0 4,1002,050
FeetAutumn HillsLegend
Ditches NBMG '97 Flood Extents
!
!
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!
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!
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!!
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TRANCE ACRE DR
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SOUTH CT
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SPRUCE ST
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MONTERRA DR
DOUGLAS AV
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ROSS
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BEHIA
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CASTLELN
KINGSLANE
SNAFFLE BIT D
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BOUGAINVILLEA DRTH
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GARDENGLEN
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BELARRA DR
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MILLCREEKCI
LASBRISAS
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CAP L
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GILMAN AV
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Polel
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Poleline Ditch
Poleline Ditch
Middle Ditch
Middle Ditch
MartinSlough
MartinSlough
Martin
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IrrigationPipeline
Irriga
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IrrigationPipeline
Home Slough
Home Slough
Heyb
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Ditc
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Ferris Ditch
Ferris Ditch
Ferris Ditch
East
Ditch
Dryer pipeline
Dryerpipeline
Dryer Ditch
Drain
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Pipelin
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Drain
age
Ditch
Drainage Ditch
Divers
ion
Deten
tion
Pond
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DetentionPond
DetentionPond
DetentionPond
Deten
tion Po
nd
DetentionPond
DetentionPond
Deten
tionPo
nd
Deten
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Cottonwood Slough
Cottonwood Slough
Cottonwood
Slough
Cottonwood Slough
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DOUGLASHIGHSCHOOL
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MINDEN INNCVICHALL
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DC LIBRARY
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TOWN OF MINDEN OFFICE
DC HUMANSERVICES
DISPATCH & GIS
34
31
29
30
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3334
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30
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FeetMindenLegend
Ditches NBMG '97 Flood Extents
!
!
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!
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!
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WOODYSPL
PLUM CT
OLDFOOTHILL
RD
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MULLER LN
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KINGSB
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Runoff
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Rock Diversion
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Middle Ditch
Lower Brockliss Slough
Johnson Slough
Johnson Slough
Home Slough
Home Slough
CRiver
CRiver
CRiver
Brockliss Slough
Brock
liss Sl
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36
40
41
42
45
Esri, USDA Farm Service Agency
. 0 4,1002,050
FeetFoothillLegend
Ditches NBMG '97 Flood Extents
!
!
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driveway
MEAD
OWLA
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VALL
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MILL ST KINSE
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DrainageDitch
Drainage Ditch
Drainage
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Drainage Ditch
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Slou
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Bridge
TOWN OFGENOAOFFICE
MORMONSTATIONPARK
GENOATOWN PARK
EFFPD STATION 3
POSTOFFICE -GENOA
45
46
47
48
Esri, USDA Farm Service Agency
. 0 4,1002,050
FeetGenoaLegend
Ditches NBMG '97 Flood Extents
!!
PLYM
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DR
VI STA
G RA N
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N HW
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S SUN
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Drainage Ditch
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49
Esri, USDA Farm Service Agency
. 0 4,1002,050
FeetCarson 395Legend
Ditches NBMG '97 Flood Extents
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