North Peoria Area Drainage Master Plan - Flood Control District of ...
North Peoria Area Drainage Master Plan - Flood Control District of ... North Peoria Area Drainage Master Plan - Flood Control District of ...
FLOOD AND EROSION HAZARD ZONESWith the exception of the East Terrace Area100-year floodplains and erosion hazardzones where delineated for watercourses withdrainage areas of approximately one squaremile. In the East Terrace Area, due to soil conditions,rainfall runoff relations were higherthan in the rest of the study areas, thereforefloodplains were delineated for watercourseswith drainage areas of less than a square mile.Floodplains and erosion hazard zones developedas part of the North Peoria ADMP, andfloodplains previously delineated by otherstudies are displayed on Figure 7, Figure 8,Figure 9, and Figure 10.ENVIRONMENTAL CHARACTERISTICS%DQN6ORXJKLQJZLWKLQ(URVLRQ+D]DUG=RQHFloodplain delineation and erosion hazardzones form the basis for the identification ofpotential public safety hazards associatedwith natural processes that form the physicalcharacteristics of watercourses within thestudy area. Floodplains based on a 100-yearpeak discharge and erosion hazards zonedelineation were conducted for watercoursesin the Morgan City Area, Big Springs Area,and the Twin Buttes Area, whereas only floodplaindelineation was conducted for the EastTerrace Area.Environmental overviews were conducted todefine the ecological/biological resources, cultural/historicalresources, regulatory hazardouswaste sites, and visual resources of thearea. The overviews are based on availableexisting information and data collected duringreconnaissance level field visits. Results of theoverviews are then utilized in the formulationand evaluation of flood control managementalternatives.BIOLOGICAL RESOURCE OVERVIEW7ULDQJOH/HDI%XUVDJH)RRWKLOOV9HJHWDWLRQ&RPPXQLW\(URVLRQDW6WRFN7DQN'DPThe focus of the biological resources overviewwas to describe and map vegetation communitiesto the association level, identify thepotential occurrence of sensitive, threatened,and endangered species and assess sensitiveor special status habitats within the projectarea. Mapping of vegetation communitiesand assessment of sensitive or special statushabitats were based on low intensity field surveys.Threatened, endangered, and sensitivespecies that potentially occur in the planningarea were determined by consulting the specieslist from the U.S. Fish and Wildlife Servicefor Maricopa County, and through a search of9
NORTH PEORIAAREA DRAINAGE MASTER PLANthe heritage database at the Arizona Gameand Fish Department.Twelve plant associations were identifiedwithin the project area. Several of the associationshave large numbers of plant species incommon, such that the associations differ onlyin respect to the relative proportions of eachspecies. The location and distribution of plantcommunities are displayed on Figure 11.0RUJDQ&LW\:DVK5LSDULDQ*DOOHU\)RUHVWTwo special statusspecies, SonoranDeserttortoise and lowlandleopardfrog, are knownto occur withinthe planningarea. The distributionof lowlandleopardfrogs is restrictedto the lower limitsof MorganCity Wash andthe Agua FriaRiver drainage,while Sonoran Desert tortoise probably occurthroughout most of the planning area. Additionally,southwestern willow flycatchers andlesser-long nosed bats may not occur withinthe area at present, but suitable and sufficienthabitat exists to support individuals of bothspecies. Additional species might becomelisted as threatened or endangered by the federalgovernment before development is initiatedin the area (e.g., yellow-billed cuckoo).Surveys for species that are currently listed orthat may become listed as threatened orendangered, and possibly consultations withthe U.S. Fish and Wildlife Service, will be necessaryto minimize or avoid developmentimpacts to these species. At present, there areno critical habitat designations for any specieswithin the planning area.9HOYHW0HVTXLWH9HJHWDWLRQ&RPPXQLW\The only sensitive and biologically uniquehabitat within the planning area is the aquaticarea and the accompanying riparian galleryforest that occur along the lower reaches ofMorgan City Wash. This habitat extends fromthe confluence with the Agua Fria Riverupstream to above the springs that deliverwater to the wash. The riparian gallery forestis well developed and mature throughout thisarea. The stream supports numerous speciesof wetland plants and aquatic species includingnative fish such as longfin dace (Agosiachrysogaster) and lowland leopard frogs.CULTURAL RESOURCES OVERVIEWCultural Resources is a very broad term. Forthe purposes of the North Peoria ADMP, werefer to cultural resources within the contextof preservation. A cultural resource includesprehistoric, historic, architectural, and traditionalcultural sites. These sites are consideredimportant, because they representlocations and data that can inform us aboutcultures and cultural change through time.Cultural resourcelaws are designedto afford protectionto significantsites so that importantcultural andhistorical informationis not lost.&XOWXUDO5HVRXUFH6LWHProtection canoccur by simplyprotecting sites, or by professionally excavat-10
- Page 2 and 3: TABLE OF CONTENTSPreface ..........
- Page 4: PREFACEAt the request of the City o
- Page 8 and 9: LIST OF TABLESTable 1: Regional and
- Page 10 and 11: INTRODUCTIONThe natural physical ch
- Page 12 and 13: minimize the effect of urbanization
- Page 14 and 15: Peoria General PlanThe Peoria Gener
- Page 16 and 17: HYDRAULICS8QQDPHG:DVK%LJ6SULQJHydra
- Page 20 and 21: ing them before they are destroyed
- Page 22 and 23: PUBLIC INVOLVEMENTAn integral part
- Page 24 and 25: hard pan, typically less than two f
- Page 26 and 27: Economic CriterionThe evaluation of
- Page 28 and 29: Table 4Summary of Evaluation Result
- Page 30 and 31: INTRODUCTIONRULES OF DEVELOPMENTCom
- Page 32 and 33: Objective EH1.3Identify erosion haz
- Page 34 and 35: the purpose of watershed and waterc
- Page 36 and 37: the North Peoria ADMP. Users of the
- Page 38 and 39: (short, constricted reaches), backw
- Page 40 and 41: • Collect hydrologic data - peak
- Page 42 and 43: • Basin Outlet (Culvert). The bas
- Page 44 and 45: Low Impact Structural AlternativeFo
- Page 46 and 47: ack at the natural channel bed. In
- Page 48 and 49: stability, and to assure structure
- Page 50 and 51: developed for the Estrella Roadway,
- Page 52 and 53: gabion mattressA gabion mattress is
- Page 54 and 55: Maricopa County, August 21, 1993, H
FLOOD AND EROSION HAZARD ZONESWith the exception <strong>of</strong> the East Terrace <strong>Area</strong>100-year floodplains and erosion hazardzones where delineated for watercourses withdrainage areas <strong>of</strong> approximately one squaremile. In the East Terrace <strong>Area</strong>, due to soil conditions,rainfall run<strong>of</strong>f relations were higherthan in the rest <strong>of</strong> the study areas, thereforefloodplains were delineated for watercourseswith drainage areas <strong>of</strong> less than a square mile.<strong>Flood</strong>plains and erosion hazard zones developedas part <strong>of</strong> the <strong>North</strong> <strong>Peoria</strong> ADMP, andfloodplains previously delineated by otherstudies are displayed on Figure 7, Figure 8,Figure 9, and Figure 10.ENVIRONMENTAL CHARACTERISTICS%DQN6ORXJKLQJZLWKLQ(URVLRQ+D]DUG=RQH<strong>Flood</strong>plain delineation and erosion hazardzones form the basis for the identification <strong>of</strong>potential public safety hazards associatedwith natural processes that form the physicalcharacteristics <strong>of</strong> watercourses within thestudy area. <strong>Flood</strong>plains based on a 100-yearpeak discharge and erosion hazards zonedelineation were conducted for watercoursesin the Morgan City <strong>Area</strong>, Big Springs <strong>Area</strong>,and the Twin Buttes <strong>Area</strong>, whereas only floodplaindelineation was conducted for the EastTerrace <strong>Area</strong>.Environmental overviews were conducted todefine the ecological/biological resources, cultural/historicalresources, regulatory hazardouswaste sites, and visual resources <strong>of</strong> thearea. The overviews are based on availableexisting information and data collected duringreconnaissance level field visits. Results <strong>of</strong> theoverviews are then utilized in the formulationand evaluation <strong>of</strong> flood control managementalternatives.BIOLOGICAL RESOURCE OVERVIEW7ULDQJOH/HDI%XUVDJH)RRWKLOOV9HJHWDWLRQ&RPPXQLW\(URVLRQDW6WRFN7DQN'DPThe focus <strong>of</strong> the biological resources overviewwas to describe and map vegetation communitiesto the association level, identify thepotential occurrence <strong>of</strong> sensitive, threatened,and endangered species and assess sensitiveor special status habitats within the projectarea. Mapping <strong>of</strong> vegetation communitiesand assessment <strong>of</strong> sensitive or special statushabitats were based on low intensity field surveys.Threatened, endangered, and sensitivespecies that potentially occur in the planningarea were determined by consulting the specieslist from the U.S. Fish and Wildlife Servicefor Maricopa County, and through a search <strong>of</strong>9
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