Oro Valley City Zoning Code

Appendixes

Addendum A Design Guidelines

Addendum C Approved Native Plant List

TABLE C-1: ORO VALLEY PROTECTED NATIVE PLANT LIST
Latin Name	Common Name	Legal Protection
Acacia greggii	Catclaw Acacia
Acacia constricta	Whitethorn Acacia
Carnegiea gigantea	Saguaro	NPL-SR
Carnegiea gigantea	Saguaro, crested form	NPL-HS
Castela emoryi	Crucifixion Thorn	NPL-SR
Celtis pallida	Desert Hackberry
Celtis reticulata	Netleaf Hackberry
Cercidium floridum	Blue Palo Verde	NPL-SA
Cercidium microphyllum	Foothills Palo Verde	NPL-SA
Echinocactus horizonthalonius var. nicholii	Blue Barrel Cactus	NPL/ESA-NPL/HS
Ferocactus wislezenii	Fishhook Barrel	NPL-SR
Fourquieria splendens	Ocotillo	NPL-SR
Mammillaria thornberi	Thornber Clustered Pincushion	NPL-SR
Opuntia fulgida var. fulgida	Chain-fruit Cholla*	NPL-SR
Opuntia phaeacantha var. discata*	Desert or Engelmann Prickly-Pear*	NPL-SR
Olneya tesota	Ironwood	NPL-SA/HR
Peniocereus greggii	Desert Night-blooming Cereus	NPL-SR
Prosopis pubescens	Screwbean Mesquite	NPL-HR/SA
Prosopis velutina	Velvet Mesquite	NPL-HR/SA
Tumamoca macdougalii	Tumamoc Globeberry	NPL-SR
Yucca elata	Soaptree Yucca	NPL-SR
Zizyphus obtusifolia var. canescens	Greythorn
KEY: NPL = Plants regulated by the Arizona Native Plant Law HR = Harvest Restricted SR = Salvage Restricted SA = Salvage Assessed ESA = Plants protected by the Federal Endangered Species Act HS = Highly Safeguarded * = See “2” below

TABLE C-2: ORO VALLEY SUPPLEMENTAL PROTECTED NATIVE PLANT LIST (UNDER-STORY)
Latin Name	Common Name	Occurrence	Legal Protection
Abutilon Incanum	Indian Mallow	C
Abutilon Parishii	Tucson Indian Mallow	UC	SR
Acacia Angustissima var. Hirta	Fern Acacia	UC
Acacia Constricta	White Thorn Acacia	CW
Acacia Greggii	Catclaw Acacia	C
Agave Chrysantra	Golden-Flowered Agave	UC	SR
Agave Palmeri	Palmer Agave	UC	SR
Ambrosia Ambrosioides	Canyon Ragweed	C
Ambrosia Deltoidea	Triangleleaf Bursage	CW
Anemone Tuberosa	Desert Windflower	UC
Anisacanthus Thurberi	Thurber Desert Honeysuckle	UC
Astrolepis Cochisensis	Cochise Scaley Astrolepis	UC
Astrolepis X Integerrima	Hybrid Cloak Fern	UC
Astrolepis Sinuata	Wavy Astrolepis	UC
Astrolepis Standleyi	Standley Astrolepis	UC
Baccharis Salicifolia	Seep Willow	C
Baileya Multiradiata	Desert Marigold	C
Calliandra Eriophylla	Fairy Duster	C
Celtis Pallida	Desert Hackberry	C
Clematis Drummondii	Texas Virgin Bower	UC
Clematis Ligusticifolia	White Virgin’s Bower	UC
Condalia Warnockii var. Kearneyana	Kearney Condalia	C
Coursetia Microphylla	Baby Bonnets	UC
Crossosoma Bigelovii	Bigelow Ragged Rock Flower	UC
Dasylirion Wheeleri	Wheeler Dasylirion	UC	SR
Dichelostemma Pulchellum var. Pauciflorum	Small-Flowered Covena	C	SR
Dodonaea Viscosa var. Angustifolia	Hop Tree	UC
Echinocereus Fasiculatus var. Fasiculatus	Bundle Hedgehog Cactus	C	SR
Encelia Farinoba	Brittle Bush	C
Ephedra Trifurca	Long-Leaved Joint-Fir	C
Eragrostis Intermedia	Plains Lovegrass	UC
Ericameria Laricifolia	Turpentine Bush	C
Eriogonum Wrightii	Wright Buckwheat	UC
Glandularia Gooddingii	Goodding Verbena	C
Gossypium Thurberi	Desert Cotton	UC
Hibiscus Coulteri	Desert Rose Mallow	C
Hymenoclea Monogyra	Burro Brush	C
Hymenoclea Salsola	Burro Brush	C
Hyptis Emoryi	Desert Lavender	UC
Jatropha Cardiophylla	Limberbush	UC
Justicia Californica	California Chuparosa	UC
Krameria Parvifolia	Range Ratany	C
Larrea Divaricata var. Tridentata	Creosote Bush	C
Lycium Berlandieri var. Parviflorum	Berlandier Wolfberry	C
Lycium Fremontli	Fremont Desert Thorn	C
Marah Gilensis	Big Root	UC
Menodora Scabra	Yellow Menodora	C
Mimosa Biuncifera	Wait-a-Minute Mimosa	UC
Mimulus Guttatus	Seep-Spring Monkey Flower	UC
Muhlenbergia Porteri	Bush Muhly	C
Muhlenbergia Rigens	Deer Grass	UC
Opuntia Arbuscula	Pencil Cholla	C	SR
Opuntia Ffulgida var. Mammillata	Smooth Chain-Fruited Cholla	C	SR
Opuntia Kleiniae var. Tetracantha	Four-Spined Pencil Cholla	UC	SR
Opuntia Leptocaulis	Desert Christmas Cholla	C	SR
Opuntia Spinosior	Cane Cholla	C	SR
Opuntia Versicolor	Staghorn Cholla	C	SR
Pellaea Truncata	Spiny Cliff Brake	UC
Penstemon Parryi	Parry Penstemon	C
Psilostrophe Cooperi	Cooper Paper Flower	CW
Simmondsia Chinensis	Jojoba	UC
Sporobolus Contractus	Spike Dropseed	UC
Sporobolus Cryptandrus	Sand Dropseed	UC
Sporobolus Wrightii	Sacaton	UC
Tiquilia Canescens	Shrubby Tiquilia	UC
Trixis Californica	Trixis	C
Zinnia Acerosa	Desert Zinnia	C
(Oro Valley Occurrence: CW = Common Widespread, C = Common, UC = Uncommon)

TABLE C-3: ORO VALLEY APPROVED PLANT LIST (ALL AREAS) *See Bottom of List for Key to Symbols List Sorted Alphabetically by Botanical Name
Botanical Name	Common Name	Status	Origin	Needs	Hardy
Abronia villosa	Sand Verbena	Gc, an	SD	1
Acacia angustissima	White Ball Acacia	S	SD	2	sh
Acacia cavenia	Cavenia Acacia	T	SD, CD	2
Acacia constricta	Whitethorn Acacia, Mescat	T, S*	SD, CD	1
Acacia eburnia	Needle Acacia	T	SD, CD	1
*Acacia farnesiana	Sweet Acacia	T	SD, CD	2	sh
Acacia greggii	Cat’s Claw Acacia	T, S	SD, CD	1-2
*Acacia minuta (smallii)	Southwestern Sweet Acacia	T, S, cl	SD, CD	2
Acacia schaffneri	Twisted Acacia	T	CD	1-2
Acacia smallii	Sweet Acacia	T	SD, CD	1-2	sh
Acacia willardiana	Palo Blanco	T	SD	1‑2	sh
Agave americana	Century Plant	Sc	CD	1‑2
Agave colorata	Agave	Sc	SD	1
Agave filifera	Agave	Sc	CD	1‑2
Agave huachucensis	Huachuca Agave	Sc	SD	1‑2
Agave lophantha (univittata)	Agave	Sc	CD	2
Agave ocahui	Ocahui Agave	Sc	SD	1‑2
Agave palmeri	Palmer Agave	Sc	SD	1
Agave victoriae‑reginae	Victoria Regina Agave	Sc	CD	1‑2
*Agave vilmoriniana	Octopus Agave	Sc	SD	1‑2	sh
Aloysia gratissimma	Fragrant Bush, Bee Brush	S	SD, CD	2
Aloysia wrightii	Wright’s Oregano, Lemon Verbena	S	SD, CD	2
Ambrosia (Franseria) deltoidea	Triangle‑Leaf Bursage	S	SD
Ambrosia (Franseria) dumosa	White Bursage	S	SD	1
Anisacanthus thurberi	Desert Honeysuckle	S	SD	2
*Antigonon leptopus	Queen’s Wreath	V, cl	SD	2‑3	(t)
Asclepias linaria	Pine‑Leaf Milkweed	S	SD, CD	2
Asclepias subulata	Desert Milkweed	A	SD	2	sh
Aster bigelovii	Aster	an	SD	1	(t)
Aster tanacetifolius	Aster	an	SD, CD	1	(t)
Atriplex canescens	Four‑Wing Saltbush	S	SD, CD	1
Atriplex hymenelytra	Desert Holly	S	SD, CD	1
Atriplex lentiformis	Quail Bush	S	SD	1
Atriplex lentiformis breweri	Brewer Saltbush	S	SD	1‑2
Atriplex polycarpa	Desert Saltbush	S	SD	1
Bahia absinthifolia	Desert Daisy	p, cl	SD	2
Baileya multiradiata	Desert Marigold	p, cl*	SD, CD	1‑2
Bothriochloa barbinodis	Cane Beardgrass	Gr, cl	SD, CD	1
Buchloe dactylodes	Buffalo Grass	Gr	CD	2-3
Bursera microphylla	Elephant Tree	T	SD	2,1	(t)
*Caesalpinia (Poinciana)	mexicana	Mexican Bird of Paradise (Yellow)	S, cl*	CD	2
Calliandra eriophylla	Fairy Duster, False Mesquite	S, cl	SD	1
Carnegiea gigantea	Saguaro	C	SD	1
Cathostecum erectum	False Grama	Gr, cl	SD	1
Celtis pallida	Spiny or Desert Hackberry	S	SD, CD	1‑2
*Celtis reticulata	Netleaf or Western Hackberry	T	SD, CD	2
Cephalophyllum ‘Red Spike’	Red Spike Ice Plant	Gc, Sc, cl		2
*Cercidium Hybrid	Desert Museum Palo Verde			1-2
*Cercidium floridum	Blue Palo Verde	T, cl	SD	2‑3
Cercidium microphyllum	Littleleaf or Foothill Palo Verde	T, cl	SD	1
Cercidium praecox	Palo Brea	T, cl	SD	2	sh
Cercidium sonorae	Sonoran Palo Verde	T, cl	SD	1‑2
*Chilopsis linearis	Desert Willow	T, S, cl	SD, CD	2‑3
Cissus incisa	Desert Grape Ivy	V	CD	1‑2	I
Cissus trifoliata	Desert Grape Ivy	V	SD	1‑2
Condalia warnockii var.	kearneyana	Condalia	S	SD, CD	1
Cordia parvifolia	Littleleaf Cordia	S, cl	SD, CD	1‑2
Cupressus arizonica	Arizona Cypress	T	SD, CD	2
Dasylirion acrotriche	Green Desert Spoon	A	CD	1
Dasylirion wheeleri	Sotol, Desert Spoon	A	SD, CD	1
Digitaria californica	Arizona Cottontop	Gr	SD, CD	1
Dodonaea viscosa	Hopbush	S	SD, CD	1‑2	sh
Echinocactus grusonii	Golden Barrel	C, cl	SD	1-2
Echinocereus spp.	Hedgehog, Rainbow Cactus	C, cl	SD, CD	1
Encelia californica	California Brittlebush (Green)	S, cl	SD	1‑2	sh
Encelia farinosa	Brittlebush	S, cl	SD	1‑2	sh
Euphorbia antisyphilitica	Wax Plant, Candelilla	S	CD	1
Euphorbia myrsinites	Euphorbia	Gc		2
Fallugia paradoxa	Apache Plume	S	SD	2,1
Ferocactus spp.	Barrel Cactus	C, cl	SD, CD	1
Forestiera neomexicana	Desert Olive	S	SD	1,2
Fouquieria splendens	Ocotillo	A, cl	SD, CD	1
Gossypium harknessii	Gossypium	S, cl	SD	2	(t)
Haplopappus (Ericameria) laricifolius	Turpentine Bush	S, cl	SD, CD	1
Hesperaloe funifera	Giant Hesperaloe	A	CD	1‑2
Hesperaloe parviflora	Red Yucca, Red Flowered Hesperaloe	A, cl	CD	1‑2
Hibiscus coulteri	Yellow Hibiscus, Coulter’s Hibiscus	S	SD, CD	2
Hilaria berlangeri	Curly Mesquite	Gr	SD, CD	2
Hilaria mutica	Tobosa Grass	Gr	SD, CD	1
Hilaria rigida	Big Galleta Grass	Gr	SD, CD	2
Jatropha cardiophylla	Limberbush	S	SD	1
Jatropha dioica	Jatropha	S, cl	CD	1	(t)
*Justicia (Beloperone) californica	Chuparosa	S, cl	SD	2-3	(t)
Larrea tridentata (divaricata)	Creosote Bush, Greasewood	S, cl	SD, CD	1
Leucaena retusa	Golden Leadball	T, S, cl	CD	1‑2
Lupinus arizonicus	Lupine	an, cl	SD	1
Lupinus sparsiflorus	Desert Lupine	an, cl	SD	1
Lupinus succulentus	Arroyo Lupine	an, cl	SD	1
Lycium exsertum	Lycium	S	SD	1
Lycium fremontii	Wolfberry	S	SD	1
*Lysiloma candida	Palo Blanco	T, S	SD	2,3	(t)
*Lysiloma thornberi	Feather Tree	T, S	SD	2‑3	sh
Mamillaria spp.	Mamillaria Cactus	C, cl	SD, CD	1-2
*Mascagnia macroptera	Yellow Orchid Vine	V, cl	SD, CD	2‑3	sh
Maytenus phyllanthoides	Mangle Dulce	S	SD, CD	2
Melampodium leucanthum	Blackfoot Daisy	Gc, p, cl	SD, CD	2
*Merremia aurea	Yellow Merremia	V, cl	SD	2‑3	(t)
*Mimosa biumcifera	Wait-a-Minute Bush	S	SD	2-3
Mimosa dysocarpa	Velvetpod	S, cl	SD	2
*Muhlenbergia dumosa	Bush Muhlenbergia, Bamboo Muhly	Gr	SD	3‑4
Muhlenbergia emersleyi	Bullgrass	Gr, cl	SD	1
Muhlenbergia porteri	Bush Muhly	Gr, cl	SD, CD	1
Nolina bigelovii	Beargrass	A	SD	1‑2
Nolina matapensis	Tree Beargrass	A, T	SD	1‑2
Nolina microcarpa	Beargrass	A	SD	1‑2
Nolina parryi	Parry’s Beargrass	A	SD	1‑2
Olneya tesota	Desert Ironwood, Tesota	T	SD, CD	1	(sh)
Opuntia spp.	Prickly Pear, Cholla	C	SD, CD	1
Pappophorum mucronulatum	Pappusgrass	Gr	SD	1
Pedilanthus macrocarpus	Slipper Flower	A, Sc, cl*	SD	2
Penstemon baccharifolius	Cutleaf Penstemon	p, cl	CD	1
Penstemon barbatus	Beardtongue Penstemon	p, cl	SD, CD	1
Penstemon eatoni	Eaton’s Penstemon	p, cl	SD	1
Penstemon parryi	Parry Penstemon	p, cl	SD	1
Penstemon pseudospectabilis	Canyon Penstemon, Mohave Beardtongue	p, cl	SD	1
Penstemon superbus	Superb Penstemon	p, cl	CD	1
Pithecellobium flexicaule	Texas Ebony	T	CD	2	sh
Pithecellobium pallens	Tenaza	T	CD	2	sh
Prosopis glandulosa glandulosa	Honey or Texas Mesquite	T#	CD	2
Prosopis pubescens	Screwbean Mesquite	T	SD, CD	2
Prosopis velutina	Velvet Mesquite	T#	SD	2
Psilostrophe cooperi	Paper Flower	p, cl	SD, CD	2
Rhus microphylla	Littleleaf Sumac	S, cl	CD	2
Rhus ovata	Sugar Bush, Sugar Sumac	S	SD	2
Rhus virens	Evergreen Sumac	S, cl	CD	2
Ruschia uncinatus	Ruschia	Sc, Gc		2
Sambucus mexicana	Mexican Elderberry	T	SD, CD	2
Senna covesii	Desert Senna	P, cl	SD	1‑2
Senna wislizenii	Cassia, Shrubby Senna	S, p, cl	SD, CD	2
Simmondsia chinensis	Jojoba, Goat Nut	S	SD	1‑2
Sphaeralcea spp.	Globe‑Mallow	P, cl	SD, CD	1
Sporobolus contractus	Spike Dropseed	Gr	SD, CD	1
Sporobolus wrightii	Sacaton	Gr	SD, CD	1
Stenocereus (Lemaireocereus) thurberi	Organ Pipe Cactus	C	SD	1	(t)
Stipa neomexicana	New Mexico Feathergrass	Gr	SD, CD	2
Trucklers crinita	Two-Feather Trichloris	Gr	SD, CD	2
Trichocereus spp.	Trichocereus Cactus	C		1-2
Tridens muticus	Slim Tridens	Gr	SD, CD	2
Vauquelinia californica	Arizona Rosewood	S, T#	SD	2
Verbesina encelioides	Crown Beard	an, cl	SD, CD	2
Viguiera deltoidea	Golden Eye	p, cl	SD	2
Vitex agnus‑castus	Chaste Tree, Monk’s Pepper	T, S, cl		2
Yucca aloifolia	Spanish Bayonet Yucca	A	SD	1
Yucca baccata	Banana Yucca	A	SD, CD	1
Yucca brevifolia	Joshua Tree	A	CD	1
Yucca carnerosana	Giant Dagger Yucca	A	CD	1
Yucca elata	Soaptree Yucca	A	SD, CD	1
Yucca glauca	Small Soapweed Yucca	Sc	U.S.A.	1
Yucca rigida	Blue Dagger Yucca	A, cl	CD	1
Yucca rostrata	Beaked Yucca	A	CD	1
Yucca schottii	Mountain Yucca	Sc	SD	1
Yucca treculeana	Tree Yucca	A	CD	1
Yucca whipplei	Our Lord’s Candle	A	SD	1
Zinnia acerosa	Desert Zinnia	P, cl	SD, CD	1
Zinnia grandiflora	Rocky Mountain Zinnia	P, cl	CD	2
Zizyphus obtusifolia	Greythorn	S, T	SD	1	sh

TABLE C-4: ORO VALLEY APPROVED PLANT LIST (COURTYARDS AND NORTH OR EAST BUILDING ELEVATIONS ONLY)

*See Bottom of List for Key to Symbols List Sorted Alphabetically by Botanical Name

Botanical Name

Status

Origin

Needs

Hardy

TABLE C-4: ORO VALLEY APPROVED PLANT LIST (COURTYARDS AND NORTH OR EAST BUILDING ELEVATIONS ONLY) *See Bottom of List for Key to Symbols List Sorted Alphabetically by Botanical Name
Botanical Name		Status	Origin	Needs	Hardy
Acacia abyssinica	Abyssinian Acacia	T	Africa	3	sh
Acacia aneura	Mulga	T	Australia	2	sh
Acacia berlandieri	Guajillo	S, T	CD	3
Acacia crasspedocarpa	Waxleaf Acacia	T, S	Australia	1
Acacia cultriformis	Knife‑Leaf Acacia	T, S	Australia	2	sh
Acacia notabilis	Acacia	S	Australia	2
Acacia redolens	Prostrate Acacia	S, Gc	Australia	2
Acacia rigidula	Black Brush Acacia	S, T	CD	3
*Acacia salicina	Weeping Wattle	T, cl	Australia	2	sh
*Acacia saligna	Wattle Tree	T	Australia	1‑2	sh
Acacia stenophylla	Pencilleaf Acacia	T	Australia	1‑2
Aloe barbadensis	Barbados Aloe	Sc, cl	Africa	2‑3	sh
Aloe ferox	Cape Aloe	Sc, cl	Africa	2‑3	sh
Aloe saponaria	Mediterranean Aloe	Sc, cl	Africa	2‑3	sh
Atriplex nummularia	Old Man Saltbush	S	Australia	1
Atriplex semibaccata	Australian Saltbush	S	Australia	2
Berberis harrisoniana	Barberry	S	SD	3
Berberis trifoliata	Agritos	S	SD	3
Bougainvillea spp.	Bougainvillea	V, S, cl	Brazil	3	(t)
Brachychiton populneus	Bottle Tree	T	Australia	2‑3
Brahea (Erythea) armata	Mexican Blue Palm	T	SD	2‑3
Buddleia marrubifolia	Wooly Butterfly Bush	S, cl	CD	2-3
Caesalpinia (Poinciana) gilliesii	Yellow Bird of Paradise	S, cl*	Argentina	1-2
*Caesalpinia pulcherrima	Red Bird of Paradise	S, cl*	Caribbean	3	sh
*Calliandra californica	Red Fairy Duster, Baja Fairy Duster	S, cl	SD	2‑3
*Calliandra peninsularis	Red Calliandra, Baja Fairy Duster	S, cl	SD	2‑3	sh
Callistemon citrinus	Lemon Bottlebrush	T, S, cl	Australia	3	sh
Calylophus hartwegii	Calylophus	Gc, cl	CD	3
Campsis radicans	Common Trumpet Creeper	V, cl	SD, CD	2‑3
Carpobrotus edulis	Ice Plant	Gc, Sc, cl, Africa	Africa	3	(t)
Cassia artemisioides	Wormwood Senna, Feathery Cassia	S, cl	Australia	2‑3	sh
Cassia nemophila (eremophila)	Green Cassia	S, cl	Australia	2
Cassia phyllodinea	Silvery Cassia	S, cl	Australia	2‑3
Cassia wislezenii	Shrubby Cassia	S, cl	Australia	2-3
Centaurea cineraria	Dusty Miller	p, cl	Mediter-ranean	3
Cercis canadensis var. mexicana	Mexican Redbud	T, S	CD	3
Cereus peruvianus ‘Monstrosus’	Peruvian Cereus	C	South America	1-2	sh
Chamaerops humilis	Mediterranean Fan Palm	T	Spain	2‑3
Convolvulus cneorum	Bush Morning Glory	S, Gc, cl* Medit.	Mediter-ranean	1‑2
Convolvulus mauritanicus	Ground Morning Glory	Gc, cl	Africa	3	sh
Cordia boissieri	Anacahuita, Texas Olive	T, S, cl	CD	2‑3	sh
Cupressus glabra	Smooth Bark Cypress	T	SD	2‑3
Dalbergia sissoo	Rosewood	T	India	3	sh
Dalea bicolor var. argyrea	Silver Dalea	S	SD	2‑3
Dalea formosa	Feather Dalea	S	SD, CD	2-3
Dalea frutescens	Black Dalea	S, cl	CD	2‑3
Dalea greggii	Trailing Indigo Bush	Gc	CD	2‑3
Dalea psorothamus spinosus	Smoke Tree	S, T	CD, SD	2-3
Dalea pulchra	Indigo Bush	S, cl	SD	2‑3
Dalea versicolor var. sessilis	Indigo Bush, Dalea	S, cl	SD	3
Dimorphotheca sinuata	African Daisy, Cape Marigold	An, cl	South Africa	4
Dyssodia acerosa	Dogweed	Gc, p, cl	SD, CD	2-3
Dyssodia pentachaeta	Dyssodia	Gc, an, p, c	SD,CD	2‑3	I
Echinopsis spp.	Easter Lily,	Sea Urchin Cactus	C, cl	S. America	1
Ephedra nevadensis	Ephedra	S	SD	3
Eremophila decipiens	Emu Bush	S, cl	Australia	1
Eucalyptus campaspe	Silver Gimlet	T	Australia	2‑3	sh
Eucalyptus formanii	Eucalyptus	T	Australia	2
Eucalyptus leucoxylon (rosea)	White Iron Bark	T, cl	Australia	2
Eucalyptus microtheca	Tiny Capsule Eucalyptus	T	Australia	1‑2
Eucalyptus polyanthemos	Silver Dollar Gum	T	Australia	2
Eucalyptus rudis	Desert Gum	T	Australia	2
Eucalyptus spathulata	Swamp Mallee	T	Australia	3
Euphorbia rigida (biglandulosa)	Gopher Plant	A, Sc, cl* Africa	Africa	2
Feijoa sellowiana	Pineapple Guava	T, S, cl	S. America	3
Ficus pumila	Creeping Fig	GC, V		3,4
Gazania rigens ‘Copper King’	Copper King Gazania	Gc, cl	Africa	3-4
Gazania rigens	Treasure Flower Gazania	Gc, cl	Africa	3‑4
Gazania rigens leucolaena	Trailing Gazania	Gc, cl	Africa	3‑4	(t)
Geoffreya (Gourleia) decorticans	Chilean Palo Verde	T, cl	S. America	1
Hyptis emoryi	Desert Lavender	S	SD	3	sh
Juniperus deppeana	Alligator Bark Juniper	T	SD, CD	3
Justicia candicans	Red Jacobinia	S, cl	SD	3	sh
Justicia spicigera	Mexican Honeysuckle, Firecracker Bush	S, cl	SD	3	sh
Lantana camara	Bush Lantana (many cultivars)	S, cl*	N. America	3‑4	(t)
Lantana montevidensis	Trailing Lantana	Gc, cl*	S. America	3‑4	(t)
Leucophyllum spp.	Texas Ranger (all cultivars)	S, cl	CD	2
Linum grandiflorum Rubrum	Scarlet Flax	Gc, an, cl		3
Linum lewisii	Blue Flax	an, cl	SD, CD	3
Macfadyena unguis‑cati	Cat’s Claw Vine	V, cl	America	2‑3
Malephora crocea	Croceum, Ice Plant	Gc, Sc, cl		2‑3
*Mascagnia lilacina	Lavender Orchid Vine	V, cl	CD	2‑3
Muhlenbergia rigens	Deer grass	Gr	SD	3
Muhlenbergia rigida	‘Nashville’ TM	Gr, cl	SD	3
Myoporum parvifolium	Myoporum	Gc	Australia	3
Myrtus communis ‘Boetica’	Twisted Myrtle	S#	Mediter-ranean	3
Myrtus communis ‘Compact’	Dwarf Myrtle	S	Mediter-ranean	3
Nandina domestica	Heavenly Bamboo (many cultivars)	S, cl		3
Oenothera berlandieri (speciosa childsii)	Mexican Evening Primrose	Gc, cl	CD	3
Oenothera caespitosa	Tufted Evening Primrose	p, cl	SD	2‑3
Oenothera stubbei	Chihuahuan Primrose, Baja Primrose	Gc, cl	CD	2‑3
Olea europaea ‘Swan Hill’	Swan Hill Olive	T	Mediter-ranean	3
Oryzopsis hymenoides	Indian Ricegrass	Gr	SD, CD	3
Osteospermum fruticosum	Trailing African Daisy	Gc, cl	Africa	3‑4	sh
Passiflora foetida	Passion Flower	V	SD	3	sh
Pentzia incana	Karoo Bush	Gc	Africa	1‑2
Phoenix canariensis	Canary Island Date Palm	T		3
Phyla nodiflora	Lippia	Gc, cl		3‑4
Pinus edulis	Piñon Nut Pine	T		2‑3
Pinus eldarica	Afghan Pine	T#	Asia	2
Pinus monophylla	Singleleaf Piñon Pine	T	Mojave	2
Pinus pinea	Italian Stone Pine	T	Mediter-ranean	2‑3
Pinus roxburghii	Chir Pine	T	Asia	3
Pistacia atlantica	Mt. Atlas Pistache	T	Africa	2
Pistacia chinensis	Chinese Pistache	T, cl	Asia	3
Pistacia terebinthus x integerrima	Pistache Hybrid terebinthus x integerrima	T, cl		3
Pistacia vera	Pistachio	T	Asia	2‑3
Pithecellobium mexicanum	Mexican Ebony	T	SD	3
Pittosporum phillyraeoides	Willow Pittosporum	T	Australia	2
Prosopis (S. Amer. hybrid)	Thornless Mesquite (S. Amer. Hybrid)	T#	S. America	2
Prosopis alba	Argentine Mesquite	T#	S. America	2
Prosopis chilensis	Chilean Mesquite	T#	S. America	2
Punica granatum	Pomegranate	S, T, cl	India	2‑3
Quercus arizonica	Arizona White Oak	T	SD, CD	3
Quercus emoryi	Emory Oak	T	SD, CD	3
Quercus ilex	Holly Oak	T		3
Quercus suber	Cork Oak	T*	Mediter-ranean	2
Quercus virginiana ‘Heritage’	Heritage Live Oak	T	SE U.S.A.	3
Rosa banksiae	Lady Banks Rose, Tombstone Rose	S, Gc, V		3
Rosmarinus officinalis	Bush Rosemary	S, cl	Mediterranean	2‑3
Rosmarinus officinalis ‘Prostratus’	Dwarf or Trailing Rosemary	Gc, cl	Mediterranean	2-3
Ruellia californica	Ruellia	S, cl	SD	3	(t)
Ruellia peninsularis	Ruellia	S, cl	SD	3	(t)
Salvia chamaedryoides	Blue Sage	S, p, cl	CD	2‑3
Salvia clevelandii	Cleveland Sage	S, cl		3
Salvia columbariae	Chia	An, cl	SD	3
Salvia farinacea	Mealy Blue Sage	S, cl	CD	3‑4
Salvia greggii	Texas Red Salvia, Autumn Sage	S, cl	CD	2‑3
Salvia leucantha	Mexican Bush Sage	S, cl	CD	2-3
Salvia mohavensis	Mohave Sage	S, cl	SD	2
Salvia splendens	Scarlet Sage	S, cl	CD	2-3
Santolina chamaecyparissus	Lavender Cotton	S, Gc	Mediter-ranean	2-3
Santolina virens	Green Santolina	Gc, S, cl	Mediter-ranean	3‑4
Sapindus saponaria	Soapberry	T*	SD, CD	3-4
Senecio cineraria	Dusty Miller, Silver Plant	P, cl*		3
Senna lindheimeriana	Senna	S	CD	4	sh
Sesuvium verrucosum	Sea Purslane, Ice Plant	Gc	Africa	2	(t)
Sophora secundiflora	Mescal Bean, Texas Mountain Laurel	S, T, cl*	CD	2‑3
Sophora arizonica	Arizona Sophora	S, T, cl*	SD	2-3
Sporobolus airoides	Alkali Sacaton	Gr	SD, CD	3
Tecomaria capensis	Cape Honeysuckle	S, cl	Africa	4	sh
Tagetes lemmoni	Mountain Marigold	p, cl	SD	3‑4
Tecoma stans var. angustata	Trumpet‑Bush	S, cl	SD, CD	2-3	sh
Teucrium chamaedrys (prostratum)	Prostrate Germander	Gc, p	Mediter-ranean	2‑3
Teucrium fruticans	Bush Germander	S		3
Ungnadia speciosa	Mexican Buckeye	T, cl	CD	3
Verbena gooddingii	Goodding Verbena	p, cl	SD	3‑4
Verbena peruviana	Peruvian Verbena	p, cl	S. America	4
Verbena tenuisecta (pulchella)	Moss Verbena, Fineleaf Verbena	p, cl	S. America	3
Yucca recurvifolia (pendula)	Pendulous or Curveleaf Yucca	A	U.S.A.	2
Zauschneria californica	Hummingbird Trumpet	Gc, cl	SD	3
Zauschneria latifolia	Hummingbird Flower	S	SD	3

KEY TO SYMBOLS
STATUS	T - TREE S - SHRUB A - ACCENT PLANT GC - GROUNDCOVER C - CACTUS SC - SUCCULENT (OTHER THAN CACTI) V - VINE GR - ORNAMENTAL GRASS AN - ANNUAL P - PERENNIAL CL - SEASONAL COLOR (SHOWY FLOWERS, FALL COLOR OR BERRIES)
ORIGIN	CD - Chihuahuan Desert Region - (broadly interpreted to include a large area of north central and northwest Mexico, southwest Texas, southern New Mexico and extreme southeast Arizona.) SD - Sonoran Desert Region - (broadly interpreted to include the arid and semi-arid areas of northwest Mexico, southeast California and most of Arizona south of the Mogollon Rim.) (Note: Chihuahuan and Sonoran Desert Regions annotated by Matt Johnson, Native Plant Society.)
APPROXIMATE WATERING NEEDS (depending on soil and climate conditions)	1 - No supplemental irrigation once established. 2 - Once a month during the growing season once established. 3 - Twice a month during the growing season once established. 4 - Once a week during the growing season once established
HARDINESS	sh - Semi-hardy -- some dieback in a hard frost (t) - Tender (may be severely damaged or killed in a hard frost) * - Toxic; may be harmful if eaten. (For more information call Arizona Poison Control Center at (520) 626-6016.) # - Exceptions to the nomenclature in Hortus III. I - Invasive -- may spread and intrude into natural areas.

Addendum D Oro Valley Approved Revegetation Seed Mix

SHRUBS: at least 4 species and minimum of 5 PLS/acre

Ambrosia deltoidea, Triangle-leaf Bursage (P,C)

Acacia constricta, Whitethorn Acacia (P,W)

Atriplex canescens, A. polycarpa, or A. lentiformis, Salt Bush (P,C)*

Calliandra eriophylla, Fairy Duster (P,C/W)

Celtis pallida, Desert Hackberry (P,C/W)

Encelia farinosa, Brittlebush (P,C/W)

Haplopappus laricifolius [=Ericameria laricifolia], Turpentine Bush (P,C,W)

Larrea tridentata [=L. divaricata], Creosote (P,W)

SMALL PERENNIALS: at least 4 species and minimum of 5 PLS/acre

Bahia absinthifolia, Desert Bahia (P,C)

Baileya multiradiata, Desert Marigold (P,C/W)

Cassia [= Senna] covesii, Desert Senna (P,W)

Datura wrightii, Sacred Datura (P,W)

Isocoma tenuisecta, Burrowwed (P,C/W)

Glandularia [=Verbena] gooddingii, Goodding’s Verbena (P, C/W)

Psilostrophe cooperi, Paper Flower (P,C/W)

Sphaeralcea ambigua, Desert Globemallow (P,C,W)

Zinnia pumila, Desert Zinnia (P, C)

PERENNIAL GRASSES: at least 4 species and minimum of 5 PLS/acre

Aristida purpurea, Purple Three-Awn (P,W)

Aristida ternipes, Spidergrass (P,W)

Bothriochloa [=Andropogon] barbinodis, Cane Beardgrass (P,W)

Bouteloua curtipendula, Side-Oats Grama (P,W)

Bouteloua rothrockii, Rothrock Grama (P,C/W)

Digitaria californica, Arizona Cottontop (P,W)

Eragrostis intermedia, Plains Love Grass, (P,W)

Erioneuron pulchellum, Fluffgrass (P,C)

Heteropogon contortus, Tanglehead (P,W)

Leptochloa dubia, Green Sprangle Top (P,W)

Muhlenbergia porteri, Bush Muhly (P,W)

Pappophorum mucronulatum, Pappus Grass (P,W)

Setaria macrostachya, Plains Bristlegrass (P,W)

Sporobolus airoides, Alkali Sacaton (P,W)

Sporobolus cryptandrus, Sand Dropseed (P,W)

ANNUAL HERBS AND GRASSES: at least 4 species and minimum of 5 PLS/acre

Allionia incarnata, Trailing Windmills (A,C)

Bouteloua aristidoides, Needle Grama (A,W)

Bouteloua barbata, Six Weeks Grama (A,C)

Datura discolor, Sacred Datura (A,W)

Erigeron divergens, Spreading Fleabane (A,W)

Eschscholtzia mexicana, Mexican Poppy (A,C)

Evolvulus arizonicus, Arizona Blue Eyes (A,C)

Hymenothrix wislizenii (A,W)

Kallstroemia grandiflora, Arizona Poppy (A,W)

Lesquerella gordonii, Bladderpod (A,C)

Lupinus arizonicus, Arizona Lupine (A,W)

Lupinus concinnus, Bajada Lupine (A,W)

Lupinus sparsiflorus, Desert Lupine (A,W)

Nama hispidum, Purplemat (A,C)

Orthocarpus purpurascens, Owlclover (A,C)

Pectis papposa, Dogweed (A,C)

Penstemon parryi, Parry’s Penstemon (P,A,C/W)

Penstemon subulatus, Scarlet Buglar (P,A,C/W)

Plantago insularis, Indian Wheat (A,C)

Proboscidea parviflora, Devil’s Claw (A,W)

Salvia columbariae, Chia (A,C)

Sphaeralcea coulteri, Globemallow (A,C)

Tidestromia lanuginosa, Wooly Tidestromia (A,W)

TOTAL: AT LEAST 16 SPECIES and 20 PLS/ACRE

A = Annual;

P = Perennial;

C = Germinates and thrives in the cool season;

W = Germinates and thrives in warm season;

C/W = Germinates and thrives in cool/warm seasons.

(Note: The cool season in Oro Valley runs September through March, and the warm season is from March through October. There is an overlap of seasons.)

*any combination of these species, but not more than 1.5 PLS/acre total

Addendum E Prohibited Plant List

1. Any species of tree or shrub whose mature height may reasonably be expected to exceed 25 feet, with the exception of those indigenous plants, listed in Addendum “C,” which may naturally exceed 25 feet.

2. Olive trees (Olea europaea), will be prohibited for reasons of their profuse production of allergy-producing pollen. However, the “Swan Hill Olive” and the “Wilson Hill Olive” varieties may be used due to its no-flowering non-pollen-producing status.

3. Fountain Grass (Pennisetum setaceum) will be prohibited as a defined weed with the potential to spread throughout the Town and become a fire hazard.

4. Common Bermuda Grass (Cynodon dactylon) will be prohibited as a defined weed and for its profuse production of allergy-producing pollen.

5. Mexican Palo Verde (Parkinsonia aculeata) will be prohibited as harborer of pests and for its ability to spread throughout the Town, thereby altering the present natural desert.

6. Mulberry Trees (Morus) will be prohibited as noxious pollen producers.

7. Desert Broom (Baccharis sarothroides) will be prohibited as a defined weed with the potential to spread throughout the Town.

8. Buffelgrass (Pennisetum ciliare) will be prohibited as a defined weed and fire hazard with the potential to spread throughout the Town.

9. Red Brome (Bromus rubens) will be prohibited as a defined weed and fire hazard with the potential to spread throughout the Town.

10. Lehmann Lovegrass (Eragrostis) will be prohibited as a defined weed with the potential to spread throughout the Town.

11. Malta starthistle (Centaurea melitensis) will be prohibited as a defined weed with the potential to spread throughout the Town.

12. Sahara (African) mustard (Brassica tournefortil) will be prohibited as a defined weed with the potential to spread throughout the Town.

13. Saltcedar (Tamarix ramosissima and aphylla) will be prohibited as an invasive tree with the potential to spread throughout the Town.

14. African Sumac (Rhus lancea) will be prohibited as an invasive tree with the potential to spread throughout the Town.

15. Tree of Heaven (Ailanthus altissima) will be prohibited as an invasive tree with the potential to spread throughout the Town.

Addendum F Oracle Road Architectural Design Illustrations

Addendum J Methods for Sampling Riparian Habitat and Specifications for Plant Material Quality

This Addendum contains the procedures and minimum specifications for determining and configuring sample areas and techniques for both plot sampling and transect sampling to be conducted in conjunction with preparation of a Mitigation Restoration Plan as required by Section 27.10.G.

a. Determine the sample areas within which plots or transects will be established in accordance with Reference Site requirements. The following qualities shall be included in the sample area:

b. Sample areas for significant vegetation stands should include stands of mature and healthy vegetation that meet the minimum cover or density definitions in the ESL for those resources being impacted.

c. Sample areas’ area shall be large enough to include all species belonging to the plant community.

d. The habitat should be relatively uniform throughout a single sample area. Each habitat type shall be sampled separately.

i. Plots or transects shall be distributed throughout the sample area in a manner to capture all of the variability within that sample area. Plots or transects can be either located randomly within a sample area or according to an orderly sampling scheme (e.g., on a grid, at regular intervals, etc.)—as long as the result is that the sample area is accurately described by the plot number and arrangement.

ii. The sampling locations must be approved as part of the Mitigation Restoration Plan review process, and must be representative of the area being sampled.

a. Plot sampling, or quadrant sampling, can be used to describe a variety of plant community characteristics of an area that is too large for a complete vegetation inventory to be feasible.

b. The parameters to be addressed include: diversity (species present), cover, and density (number of species in a given area).

c. The number of plots or transects conducted within each sample area should be sufficient to characterize the range of vegetation conditions within it.

i. Plot size and shape should fit the nature of the vegetation community to be sampled. Circular plots are generally recommended with these field mapping standards, as they are more efficient to accurately establish in the field.

ii. Plot size should be large enough to include a significant number of individual plants, representing all dominant species, but small enough that plants can be counted without duplication or omission of individuals.

iii. Suggested plot sizes that are typically appropriate for vegetation in the context of riparian habitat are listed below. Site characteristics may necessitate using a different plot size or shape (i.e., if the riparian vegetation entity is not wide enough). Plot shape and size should be consistent throughout.

a) Circular plots (preferred): 10-meter radius (314 m² or 3,380 ft²)

b) Square plots: 15–20 meters per side (225 m²–400 m² or 2,422 ft²– 4,306 ft²)

c) Rectangular plots: 15 meters x 20 meters (300 m² or 3,229 ft²)

Transects may be conducted according to the point intercept and belt transect methods. The method is based on a 50-meter point transect centered on a 2×50-meter plot (i.e., the belt transect). Using this method, vegetation is sampled by points at 0.5-meter intervals along the 50-meter transect to determine cover. The surveyor will note the species encountered at each interval. In addition, individuals of each perennial species rooted within the 2×50-meter plot will be counted to determine density and diversity. All annuals present in the 2×50-meter plot will also be noted.

a. Plant materials may consist of salvaged plants or cuttings as well as container plants grown in traditional or tall pots from seed collected locally specifically for the project. Container plants will be grown at a nursery that specializes in producing high-quality native plant species for habitat restoration projects.

b. Native soil shall be used in the plant containers if possible. If more native soil is needed than is available to fill plant containers, each container shall receive some native soil mixed with an appropriate commercial nursery soil mix.

c. Container plants must be grown outdoors and in full sunlight. Prior to container plants being delivered to the project site, they shall be hardened off from water, so they may be able to sustain themselves under potential drought conditions once planted.

d. Deep-planting techniques for woody species are permitted in order to achieve maximum survival with minimal irrigation. This may include deep-planting of dormant pole cuttings as well as the use of container stock grown in tall pots.

All plant materials shall be inspected by Town staff prior to installation to ensure they are healthy, disease free, and of proper species, quantities, and sizes.

Purpose

The Oracle Road Scenic Corridor Specific Plan seeks to protect significant views along the Oracle Road transportation corridor. The corridor is rich in scenic resources, including views to three (3) mountain ranges, views of foothills and prominent ridges, and views of riparian areas along the Cañada del Oro Wash.

View Categories

The view analysis criteria for the Oracle Road Specific Plan include five (5) categories of views, weighted according to their visual importance. The five (5) categories are:

• Background views of the Santa Catalina Mountains

• Background views of the Tortolita Mountains

• Background views of the Tucson Mountains

• Middle ground views of rolling hillsides and ridges

• Foreground and/or middle-ground views of the Cañada del Oro Wash

View Types Defined

Within each of these categories, there are several view types. The view types are defined as follows:

Significant panoramic background view - this view type consists of a view of an unobstructed or complete view of a large section of a mountain range. As a background, this scenery is set behind foreground and middle-ground views.

Uncompromised view - an uncompromised view provides a window, or "framed," visual access to a significant visual resource that is not compromised by structures or surface disturbance in the foreground or middle-ground.

View compromised by distant structures or surface disturbance - this type provides a window, or "framed" visual access to a significant visual resource that is compromised by structures or surface disturbance in the middle ground or near background.

View compromised by foreground utilities, signage, and structures - this type provides a window, or "framed" visual access to a significant visual resource that is compromised by above-ground utilities, structures, or surface disturbance in the foreground.

Parcels Subject to View Corridor Requirements

The following table provides weighted values for each of the view types within the five (5) view categories. All views across a subject parcel from the Oracle Road corridor shall be identified and assigned the corresponding numerical value. Any parcel which scores a value of seven (7) or more shall be subject to view corridor requirements.

ORACLE ROAD SCENIC CORRIDOR SPECIFIC PLAN VIEW ANALYSIS CRITERIA AND CHECKLIST
View Classification		Weighted Points	Views Present Across Site?
1.	Background views of the Santa Catalina Mountains
•	Significant panoramic background view	10
•	Uncompromised view	9
•	View compromised by distant structures or surface disturbance	7
•	View compromised by foreground utilities, signage, structures	6
2.	Background views of the Tortolita Mountains
•	Significant panoramic background view	9
•	Uncompromised view	8
•	View compromised by distant structures or surface disturbance	6
•	View compromised by foreground utilities, signage, structures	5
3.	Background views of the Tucson Mountains
•	Significant panoramic background view	7
•	Uncompromised views	6
•	View compromised by distant structures or surface disturbance	4
•	View compromised by foreground utilities, signage, structures	3
4.	Middle ground views of rolling hillsides and ridges
•	Uncompromised views	5
•	View compromised by surface disturbances and/or structures	4
•	View compromised by foreground utilities, signage, and/or structures	2
5.	Foreground and/or middle-ground views of the Cañada del Oro Wash
•	Uncompromised view of dense vegetative cover within the Cañada del Oro Wash	4
•	View compromised by surface disturbances and/or structures	3
•	View compromised by foreground utilities, signage, and/or structures	1
TOTAL POINTS

INSTRUCTIONS: Using photographic records of the views across the site from Oracle Road, identify the view classifications that are present. Enter the weighted point for each view classification in the right hand column. Total the weighted value for view protection on this property.

1. Methodology for Mapping

The following methodology is utilized in mapping riparian area boundaries within the Town of Oro Valley:

a. Hydroriparian includes any drainage with perennial surface water regardless of plant species composition; Mesoriparian includes any drainage without perennial surface water but any of the following species: Arizona Walnut (Juglans major), Fremont cottonwood (Populus fremontii), Gooding willow (Salix gooddingii), Arizona sycamore (Platanus wrightii), Arizona ash (Fraxinus velutina), netleaf hackberry (Celtis reticulata), or seep willow (Baccharis salicifolia); Xeroriparian includes any drainage with intermittent/ephemeral flow but not containing the above indicator species; Xeroriparian areas will have a representative vegetation volume of 0.500 m3/m2 or greater.

b. The lateral riparian boundary is a contiguous line along the canopy margins of the predominant overstory vegetation species parallel to a riparian area, where the lateral distance between canopy margins of individuals of the predominant plant species is less than two times the height of the tallest individuals. Where the distance between canopy margins parallel to the channel are greater than two times the height of the tallest individuals, the boundary is considered to be the top of bank of the channel.

c. Boundary between Meso and Xeroriparian habitat types -- any gap between Mesoriparian indicator species of 1,000 ft or greater will indicate a transition to xeroriparian. Mesoriparian boundary will be at indicator species’ canopy.

d. In braided riparian systems where ‘islands’ may occur, these are included as part of the riparian area. Islands more than 200 feet wide, or whose surface elevation is significantly higher than surrounding channels, are not included.

e. Because of natural variability, not all areas within mapped riparian areas will support the overall representative vegetation volume. Additionally, mapped riparian areas may include areas without representative vegetation volume, but do contribute to regional riparian system functions (e.g. drainage connectivity, sediment and nutrient transport, channel meander, etc.).

f. Riparian areas disconnected hydrologically from downstream riparian areas by human disturbance or impacts are not included.

g. The criteria for determining an upstream starting point (headwaters) of Riparian Areas with representative vegetation volume is where a discernible channel with an ordinary high water mark begins.

h. Vegetation volume within a riparian area will be determined using Pima County Regional Flood Control District Technical Procedure 116: Quantitative Methods for Regulated Riparian Habitat Boundary Modifications and On-Site Vegetation Surveys.

2. Special Status Species Habitat

Special Status Species Habitat is comprised of the following:

a. Breeding, foraging, cover, and dispersal habitat for common and special-status species as designated by Pima County at the time of adoption of this ordinance.

b. Wildlife habitat includes all areas identified as Significant Vegetation, Rock Outcrops and Boulders, Riparian Areas, Distinct Habitat Resources or Major and Minor Wildlife Linkages.

c. Pima County Conservation Land System Biological Core and Important Riparian Areas.

d. Nature Conservancy Conservation Target #18 (Tortolita Mountains).

e. Priority Conservation Areas (PCAs) for Priority Vulnerable Species.

f. Designated Critical Habitat for ESA Threatened and Endangered species.

g. Sonoran Desert Conservation Plan Priority Vulnerable Species (AZ WFSC, and ESA T&;E).

h. Habitat for threatened and endangered species, if designated, is to be regulated by State and Federal law.

3. Criteria Utilized to Refine Pima County SDCP Designated Multiple Use Areas

Lands were retained in Resource Management Areas by applying the following:

a. Adjacent to Protected Open Space: Land areas that are adjacent to or have connectivity to publicly or privately protected open space area or preserves.

b. Abut or connected to Riparian Areas: Land areas that directly abut or have connectivity to mapped riparian areas and floodplains.

c. Wildlife Permeable Areas: Land areas that are committed to or directly abut wildlife permeable development as defined in Section 31.

d. Minimum Size Thresholds: Resource Management Areas shall meet the following minimum size thresholds:

i. One (1) acre when abutting other resource areas, open space areas, preserves, or riparian areas. The cumulative area of the parcel(s), resource areas, open space areas, preserves, or riparian areas must be 20 acres or larger.

ii. 20 acres on a single or multiple parcels when not abutting resource areas, open space areas, preserves, or riparian areas.

e. Developed areas: Exclude graded areas of active development and areas developed at a density of greater than one home per acre.

1. Purpose

Design guidelines seek to implement the adopted land use goals of the community with regard to community design within Scenic Resource areas. The purpose includes:

To ensure the built environment conserves environmentally sensitive resources in accordance with the adopted General Plan,

To promote community development that is aesthetically pleasing and compatible with the natural surroundings,

To maintain the value of the Town’s scenic and environmentally sensitive resources, and

To minimize disturbance to the natural environment.

2. Design Review and Approval Procedures

The baseline for design guidance is contained in the OVZCR, Addendum A, Design Guidelines. These Scenic Resource Design guidelines supplement Addendum A and are intended as a flexible addition to the development requirements set forth in Section 27.10.D.3.f, Scenic Resources Category, for general land development use types along scenic corridors and within public park viewsheds.

These guidelines apply to any development in all three Tiers of the Scenic Resource Category as specified in Section 27.10.D.3.f.iii, Scenic Resources Applicability. Procedures for applying these guidelines are included in Section 27.10.D.3.f.vi.

3. Design Guidelines

Review of all site plans and subdivision plats in scenic corridor areas should consider the following particulars. Site Planning and Architectural guidelines are expected to be met for the approval of a subdivision plat or commercial site plan.

Employment/Institutional guidelines are in addition to consideration of Commercial guidelines for employment/institutional site plans in scenic corridor areas. Proposed resort developments are to be evaluated according to General Plan, Specific Plan and overlay district criteria to assure project excellence.

a. Incorporation of natural elements such as boulders, native rock or designing to blend structures with natural washes or existing stands of vegetation is highly desirable.

b. Include subdued lighting for entries, signage and parking areas.

c. Provide pathway links to interior residential neighborhoods or planned recreational trails.

d. Include Integration of structures, pedestrian paths with natural earthforms.

e. Parking or maneuvering should not be located in required minimum setback.

f. Structures should be used to screen access or frontage roadways parallel to scenic corridors. Earthen berms should comply with adopted rainwater harvesting requirements.

The following site design expectations are to be met for the approval of any subdivision plat or site plan:

a. Street patterns and/or landscaping are to be provided consistent with safe traffic visibility and design practice to screen views of rights-of-way perpendicular to scenic corridors.

b. Walls enclosing individual lots, residential clusters, or multi-family structures are to be located at the setback line of perimeter landscaped buffer areas or maintained setback tracts.

c. Pathway linkages are to be provided within the development and connecting with pathways, trails, or bike lanes paralleling the scenic corridor.

d. Except where specific view corridor preservation is intended, curvilinear street patterns and/or landscaping are to be provided to screen views of rights-of-way perpendicular to Oracle Road consistent with safe traffic visibility and design practice.

e. Maintain views from residences to mountain vistas, major washes, and native vegetation.

f. Provide structure spacing to permit views and focus on stands of vegetation.

g. Utilize subdued or managed lighting.

h. In sloped areas provide screening of structural support piers.

i. Provide shared roadway access.

a. Rear and side setbacks adjacent to residential districts should include berms and/or walls, augmented with landscaping achieving opaque screening to a height of not less than 8 feet. Berming shall comply with Town landscape requirements for rainwater harvesting.

b. No loading, storage, outdoor activity (except as expressly permitted in the underlying district), or display of merchandise visible from scenic corridors, intersecting arterials or adjacent residential neighborhoods.

c. Pathway linkages to be provided to adjacent properties where appropriate and within multi-use developments.

d. Clustering structures as a central “outcropping” visible when approaching the development on entry driveways, with principal parking areas (majority of spaces) screened by structures from scenic corridors or adjacent arterials.

e. Access driveways should be spaced 660 feet apart.

f. Provide shared roadway access.

a. Adjacent to properties used or intended for residential purposes, setbacks of the residential district are to be met or exceeded, and to include a masonry wall with landscaping as augmentation.

b. No outdoor storage visible from Oracle Road or adjacent residential neighborhoods.

c. Provide pathway links to internal recreation facilities and external pathways and routes.

d. Maintain view corridors through the site.

a. Open vistas are characteristic of this use type; walls and enhanced vegetation are to be utilized for screening functions.

b. Clustering of structures is oriented away from the perimeter of the site and view corridors, providing a central “outcropping”.

c. Keeping principal structure on lower slopes, not exceeding ridge heights.

d. Maintaining wide sight angles beyond structures is preferred.

e. Casitas should be deployed to create residential scale.

f. Emphasis should be placed on existing vegetation to accent principal buildings and plazas.

g. Vehicular circulation ways are minimized.

h. Pathway linkages, particularly to encourage resort guests’ and residents’ use of the Corridor path systems, are to be established for access to and from the principal resort structure.

i. Include visible display of open space and recreational features, such as golf courses.

j. Maintain open expanses to preserve adjacent neighborhood views.

k. Structures should be grouped well away from view corridors.

l. Low-lying building profiles should be utilized.

m. Views through the site should be preserved.

((O)20-06 , 07/15/20)

a. Buildings constructed in scenic corridors and park viewsheds should be low and of colors, materials and textures, which blend with natural desert vegetation, leaving large areas of open space between developments. Buildings that are visible from scenic corridors should seem to be a part of, or in, the landscape rather than appearing to be an imposition on the site. The buildings should follow the natural contours of the existing topography.

a) Building colors should relate to one another and the natural environment on the basis of pigment, color value, and/or intensity. In scenic corridors, earth tones and pastels are encouraged, especially in areas of high visibility. Desert/mountain colors that blend with the natural background are encouraged.

b) In areas upslope from scenic corridors, darker, geologic colors to blend with mountain slopes.

c) In locations upslope from the ultimate scenic corridor roadway right-of-way, richer, earthtone or geologic colors and rougher textures are preferred, especially those which complement background views; downslopes, darker earth colors with more dense landscaping clusters.

d) Color schemes should avoid jarring juxtapositions with primary colors.

e) In more private area, away from scenic corridors, homeowners and business owners are permitted more freedom in color selections.

f) Bright colors should not be visible from scenic corridors or other public rights-of-way.

g) Foreground colors should harmonize and blend with existing vegetation, natural rock/earth forms or built background.

c. Include architectural detailing on all structure facades.

Review of all residential developments other than individual, detached, single-family home construction shall consider the following criteria to assure design consistency with Scenic Resource intent and character:

a. Building heights should be varied, preferably mixing one and two-story homes to enable views across the site from the scenic corridor right-of-way.

b. Consistent, finished rooftop treatments, without visible roof-mounted equipment.

c. Noise Mitigation should be addressed by masonry construction, double-paned windows, and limited window openings and recreational yard uses facing scenic corridors.

d. Structural screening of access or frontage roads and parking visible from scenic corridors, and structural integration with terrain, such as building lower floors into slopes.

e. Thematic architectural detailing should be included.

a. Building heights should be varied to enable views across the site from the scenic corridor right-of-way.

b. Structural height restricted to 1:4 (from natural grade) relative to width.

c. Principal structures are constructed of rough masonry, slump block, or similar materials; board and batten, untreated concrete block or metal buildings are discouraged.

d. Moving appurtenances should not be visible from scenic corridors or other public rights-of-way.

e. Rooflines are preferred to be horizontal; others are permissible.

f. Architectural detailing includes rough-cut stone accents, recessed window treatments, and vertical elements in visible walls of greater than 50 feet in length.

a. Structural height is limited to a ratio of 1:3 relative to width.

b. Provide enhanced native landscape along frontage.

c. Include rougher building material textures.

a. Provide distinctive architecture blending with the Sonoran Desert context.

b. Include creative use of light and shade in plazas.

c. Extensive use of natural materials (rough native stone, wood) is preferred.

d. Consideration of split-level entry from parking areas.

e. Mission-style, Santa Fe, or Territorial architecture is appropriate.

f. Include landscaped focal points.

Vegetation Preservation: Innovative site planning and architectural treatments, which preserve and incorporate the maximum number of existing trees, Corridor Character Vegetation, and shrubs is encouraged in concert with compliance with native plant preservation requirements.

I. Hillside Development Zone in Effect Prior to Implementation of the Environmentally Sensitive Lands Ordinance on 7/19/11 (formerly codified in Section 24.2)

This ordinance seeks to implement the adopted planning goals of this community with regard to public safety, conservation of resources, community design and open space and recreation.

Oro Valley is surrounded by mountains. These mountainous areas exhibit steep slopes which may contain unstable rock and soils. Development on potentially unstable soils or rock can be hazardous to life and property. Development in these areas should utilize construction methods which ensure slope stabilization and minimize soil erosion.

Further, Oro Valley’s rolling desert terrain, containing peaks, ridges and drainageways, is a valuable scenic resource which should be preserved. Significant peaks and ridges should be protected in order to preserve the Town’s unique visual setting, promote its economic well-being, and encourage tourism. Regulating the intensity of development according to the natural characteristics of hillside terrain, such as steepness of slope, significant vegetation and landforms and soil stability and existing drainage patterns, will allow for sensible development in hillside areas while minimizing the physical and visual impact of such development.

This zone provides for the reasonable use of hillside areas and related lands while protecting the public health, safety, and general welfare by:

1. Determining whether certain types of soil conditions exist (such as loose or easily eroded soils, or rocky soils), and utilizing appropriate engineering technology to result in stable slopes during and subsequent to development.

2. Reduction of water runoff and changes in the natural drainage patterns, soil erosion, and rock slides by minimizing grading and requiring revegetation.

3. Permitting intensity of development compatible with the natural characteristics of hillside terrain, such as steepness of slope, significant landforms, soil suitability, and existing drainage patterns.

4. Preservation of the scenic quality of the desert and mountain environment through the retention of significant peaks and ridges in their natural state.

5. Reduction of the physical impact of hillside development by encouraging innovative site and architectural design, minimizing grading and requiring restoration of graded areas.

6. Provision of safe and convenient vehicular access by encouraging development in the less steeply sloped terrain.

7. Promoting cost-efficient public services by encouraging development in the less steeply sloped terrain, thereby minimizing service extensions and utility costs, and maximizing access for all necessary life safety services.

The provisions of the Hillside Development Zone (HDZ) apply to development in the areas listed below:

a. Any parcel with an average cross slope of 15 percent or containing slopes of twenty-five percent (25%) or greater. Methods of analyzing slope are given in Section24.2.K.

b. Any parcel containing sloped areas of twenty-five percent (25%) or greater where the sloped area is greater than fifty (50) feet in any horizontal direction or greater than seven and one-half (7 1/2) feet vertically.

Any recorded subdivision plat approved in compliance with the Pima County Hillside Development Zone regulations may be developed in compliance with the conditions and stipulations as approved. If the plat is resubdivided after the effective date of this ordinance, September 17, 1993, it must comply with all provisions of the Oro Valley HDZ currently in effect.

a. The HDZ regulations shall apply to all property described in Section24.2.C except where the development standards prevent the reasonable utilization of property as determined by the Board of Adjustment through the approval of a variance. All HDZ applicability appeals shall be heard by the Board of Adjustment in conformance with the variance procedures established in Section 21.6.

b. The HDZ regulations do not apply to the paving of an existing driveway located on property with HDZ applicability.

c. Lots within existing, approved subdivisions on the effective date of this ordinance, and subdivision plats which have been submitted prior to the effective date of this ordinance shall not be subject to the provisions of this ordinance.

Any use permitted by the underlying zone is allowed.

All development will require subdivision plat or development plan approval, in accordance with the Oro Valley Zoning Code Revised, prior to the granting of a permit for grubbing, grading, excavation, or construction.

The following development criteria apply to all parcels that are affected by this zone. Any parcel created must meet slope/size requirements of Table 24-1. All development is subject to the Oro Valley Grading Ordinance.

a. This paragraph applies to an existing parcel where no land division has occurred, nor is land division proposed, since the adoption of this ordinance. The average cross slope (ACS) is calculated for the entire parcel. If the ACS is 15 percent or greater, Columns A and D of Table 24-1 apply.

b. This paragraph applies to any parcel of property or lot where land division is proposed or has occurred since the adoption of this ordinance. The average cross slope is calculated for the parcel prior to land division. If the ACS is 15 percent or greater, columns A and C of Table 24-1 apply. Natural open space may be designated on the parcel in accordance with Section24.2.G, to reduce the ACS percentage. Such natural open space will be excluded from the ACS calculation, but will be included in the land area for the parcel.

i) If a subdivision plat is required, all 25 percent or greater slopes (as defined in24.2.C.1.b) within the proposed lots, except for those within natural open space areas, are delineated. These sloped areas then determine the design of the development according to the following criteria.

a) Where the areas of 25 percent or greater slope are located outside the buildable area, the minimum lot size requirements of the underlying zone apply. The buildable area may be redefined by the applicant to exclude areas of steeper slope in order to comply with this requirement. Grading may occur only within the buildable area and access to the buildable area. Grading for roadway or driveway access shall not cross a 25 percent or greater sloped area unless no alternative routes exist. Driveway clearing and grading may be no wider than 30 feet.

b) Where the buildable area contains areas of 25 percent or greater slope, the minimum size required for that proposed lot is 43,560 square feet unless a greater size is required by the underlying zone. The amount of grading permitted is the amount indicated in Column D of Table 24-1, based on the area of the lot, Column B.

ii) If a subdivision plat is not required, the land area of each parcel created must comply with Columns A, B and D of Table 24-1.

a. All grading is subject to the provisions of the Oro Valley Grading Ordinance.

b. The ACS is calculated for the entire parcel. If the ACS is 15 percent or greater, columns A, B, C, and D of Table 24-1 apply.

c. Natural open space may be designated on the parcel, in accordance with Section24.2.G to reduce the ACS percentage. Such natural open space will be excluded from the ACS calculation, but will be included for density calculation. If the ACS of the remaining portion of the parcel, after natural open space designation is:

i) Less than 15 percent and contains no areas of 25 percent or greater slope, 100 percent of that portion may be graded.

ii) Less than 15 percent, but contains areas of 25 percent or greater slopes, no more than 80 percent of that remaining portion may be graded.

iii) Fifteen percent or greater, columns B, C, and D of Table 24-1 apply, based on the entire area of the parcel.

a. All grading is subject to the provisions of the Oro Valley Grading Ordinance.

b. The ACS is calculated for the entire parcel. If the ACS is 15 percent or greater, columns A, B, and D of Table 24-1 apply.

c. Natural open space may be designated on the parcel, in accordance with Section24.2.G, to reduce the ACS percentage. If the ACS of the remaining portion of the parcel is:

i) Less than 15 percent and contains no areas of 25 percent or greater slope, 100 percent of that portion may be graded.

ii) Less than 15 percent, but contains areas of 25 percent or greater slope, no more than 80 percent of that remaining portion may be graded.

iii) Fifteen percent or greater, Columns B and D of Table 24-1 apply, based on the entire area of the parcel.

When a mix of development is proposed; i.e., a combination of residential, commercial, office, or industrial land uses, each use must meet all criteria for that development, as required by this section.

A	B	C	D
Average Cross Slope	*Minimum Area (Acres/Dwelling or Structure)**	*Density (Dwellings/Acre)**	Maximum Grading (Percentage)
Less Than 15 as Permitted by Underlying Zoning
15.0-15.9	1.00	1.00	40.0
16.0-16.9	1.00	1.00	40.0
17.0-17.9	1.25	.80	32.0
18.0-18.9	1.37	.73	29.2
19.0-19.9	1.50	.67	21.3
20.0-20.9	2.00	.50	20.0
21.0-21.9	2.25	.44	17.7
22.0-22.9	2.50	.40	16.0
23.0-23.9	3.50	.29	13.3
24.0-24.9	4.50	.22	11.9
25.0-25.9	6.00	.17	9.3
26.0-26.9	7.00	.14	9.3
27.0-27.9	8.60	.12	9.3
28.0-28.9	10.40	.09	9.3
29.0-29.9	12.80	.08	9.3
30.0-30.9	16.00	.06	8.8
31.0-31.9	23.50	.04	6.7
32.0-32.9	31.00	.03	6.7
33.0 and Greater	36.00	.027	4.0
* Or as permitted by underlying zoning, whichever density is less.

Natural open space (see Chapter 31 for definition) may be designated on any parcel, subject to the following criteria:

1. Development other than hiking trails will not be permitted within the legally described boundaries of natural open space in the Hillside Development Zone. Access roads, other than driveways, are not permitted within natural open space.

2. Natural open space will be delineated in a surveyable manner on the preliminary and final plats of a subdivision, or on the development plan, and shall be designated by legal description on a document recorded with the Pima County Recorder.

3. Natural open space may be designated as a deed restricted portion of a privately owned lot, or as a separate land parcel. This parcel may be under the ownership of a homeowners’ association, or deeded to any organization willing to accept responsibility for the perpetual preservation of the natural open space, subject to approval and acceptance by the Town of Oro Valley.

4. To protect natural open space, covenants which run with the land will be provided in favor of the Town of Oro Valley and all owners with record interest in the natural area.

5. If natural open space is designated on parcels four (4) acres or more, at least one (1) such natural open space area shall be a minimum of one-half (1/2) acres in size.

a. As permitted by the underlying zone. If the building also falls within the boundaries of other overlay zones, the more restrictive of the requirements applies. In order to eliminate large amounts of cut and fill, segments of buildings may be designed at varying elevations according to the slope of the land. For parcels with HDZ applicability per this section, building height shall be measured using a building height contour line (as defined in Chapter 31, Building Height Contour Line).

b. A variance to maximum building height may be approved by the Board of Adjustment. If a variance is granted, the Planning and Zoning Administrator shall review any residential structure up to the maximum height of the zoning and may approve said structure if such approval provides a better method of building to the land and is no more detrimental to adjacent properties than strict adherence to the development standards of the underlying district would allow. Such variance, as granted by the Board of Adjustment, shall be in compliance with the provisions of Section 21.6. Planning and Zoning Administrator and/or Town Engineer review and approval shall be required prior to the issuance of any grading or building permits.

c. The Planning and Zoning Commission shall review any commercial structure over eighteen (18) feet in the HDZ and may recommend approval of said structure to the Town Council if such approval provides a better method of building to the land and is no more detrimental to adjacent properties than strict adherence to the development standards of the underlying district.

All proposed site work (see Site definition in Chapter 31), including grading, shall comply with the Development Standards contained in the Grading Ordinance.

All exposed exterior walls and roofs of structures, retaining walls and accessory structures shall utilize the predominant natural colors found on the parcel. Satellite dishes shall be earth tone or black. White is not permitted. In HDZ zones, in residential zoning districts, colors may be approved by the Planning and Zoning Administrator. In commercial zoning districts, Planning and Zoning Commission approval of colors is required.

((O)17-05 , 06/07/17)

The Planning and Zoning Administrator may, prior to recordation of a subdivision plat or issuance of building permits, require measures, such as covenants, assurances, or homeowners’ associations, as are necessary to ensure the long-term maintenance of slope control measures.

1. The developer and/or property owner shall be responsible for the following:

a. Submitting average natural cross slope and sloped area analyses, certified by a qualified registrant, for review and verification by the Town Engineer or his/her designee.

b. Surveying, staking, and inspection of the property by a qualified registrant to determine compliance with the provisions of this Section.

c. On-site enforcement by certifying to the Town Engineer that the development complies with Section 24.2 Hillside Development Zone during the period of development.

2. If violation of any provision of the Hillside Development Zone occurs, the property owner shall be responsible for bringing the violation into compliance with the requirements of this zone. This may require restoration of the site as closely as possible to its original undisturbed condition, topography, and vegetation, in order to remove the violation.

The Average Cross Slope (ACS) of a site shall be determined by a qualified registrant in the following manner:

a. The site is depicted on a topographic map of the existing terrain, prior to any grading, grubbing, clearing, excavation, or modification, utilizing a scale no smaller than one (1) inch equals 100 feet, with the following contour intervals:

i) For sites less than five (5) acres, a contour interval of two (2) feet;

ii) For sites five (5) acres and greater, a contour interval of two (2) feet or five (5) feet.

b. The length of each contour line contained within the site boundaries on the map is measured by means of a mechanical device such as a map wheel or digitizer. This actual length is converted to scale length in feet. For example, at a scale of one (1) inch equals 40 feet (1" = 40'), a contour line with an actual map length of six and one-half (6 1/2) inches represents a line 260 feet long (6.5 x 40 = 260).

c. The sum of the lengths (L) of all contour lines is multiplied by the contour interval (I) in feet.

d. The result is multiplied by the factor .0023, which converts the square footage of the scale map to acres.

e. This result is then divided by the area (A) of the site in acres.

f. This process is mathematically represented by the formula

ACS =	(I) (L) (.0023)
	(A)

g. The answer is the percentage of the ACS for the site.

In addition to ACS requirements, any parcel containing areas with a slope of 25 percent or more shall have HDZ applicability as stated in Section24.2.C. A sloped area analysis, which must be prepared by a qualified registrant, shall identify individual slopes for design and review purposes. A detailed methodology for performing sloped area analysis is available from the Planning and Zoning Department.

II. Riparian Habitat Overlay Zone in Effect Prior to Implementation of the Environmentally Sensitive Lands Ordinance on 7/19/11 (formerly codified in Section 24.7)

The purpose of this section is to protect and enhance riparian areas by instituting standards for preservation of riparian habitats associated with watercourses and significant stands of native vegetation in order to:

1. Protect the valuable, limited and endangered natural riparian habitat resources of the Town of Oro Valley;

2. Provide an ecologically sound transition between riparian habitat communities and developed/developing areas;

3. Assure the continuation of existing or natural functions, values and benefits provided by riparian habitat resources;

4. Protect aesthetic and environmental values of riparian habitats for the enjoyment of citizens and visitors; and

5. Maintain linear continuity for riparian habitat.

Concurrent with the passage of this Riparian Habitat Overlay District, a set of maps entitled Riparian Habitat Maps, which are available in the Oro Valley Planning and Zoning Department, are also adopted. Said maps chart all riparian habitats within the Town of Oro Valley, which meet the criteria specified herein. Riparian areas identified must be protected from development, in accordance with the policies set forth in the Riparian Habitat Protection Overlay District, the General Plan and other adopted plans and policy documents by and of the Town of Oro Valley.

In addition to the defined Riparian Habitat area, as described and further depicted on the adopted Riparian Habitat Maps, an apron area, not less than fifteen (15) feet in width, as measured in any direction from the boundary of a defined Riparian Habitat, shall be provided. Within the required apron area, subsequent to erection of required temporary fencing (see subsections C and D of this section) and issuance of a grading permit, disturbance may occur; i.e., apron area may be used as a “trample zone” for grading, utility installation and other construction-related activities. If this required fifteen (15) foot apron area is disturbed in any way, however, the restoration of the apron, including re-establishing natural grades and soil compaction, must be addressed in the mitigation/revegetation plans, to the satisfaction of the Planning and Zoning Administrator.

This section shall apply to all new development, rezoning submittals, subdivision plats, development plans, re-subdivisions of approved plats and/or to annexed, undeveloped areas, which encompass wash and riparian habitats, as delineated on the Riparian Habitat Maps, adopted with, and made a part of, this overlay district. All regulations set forth herein shall apply to wash and riparian habitat areas identified as being either Hydroriparian, Mesoriparian or Xeroriparian, Types A, B, or C.

i) This section shall not apply to any development, residential or commercial, approved prior to the date of adoption of the ordinance codified in this Chapter.

ii) This section shall not apply to any construction related to the provision of alternative water supplies including, but not limited to, facilities for the purposes of groundwater recharge, groundwater savings, and the enhancement of riparian and environmentally sensitive areas.

((O)11-15 , 05/18/11)

At the pre-application stage of development, the Planning and Zoning Administrator or his/her designee shall evaluate a site proposed for development and, in accordance with the Riparian Habitat Maps, shall determine whether or not riparian habitat areas exist on the subject property.

In areas Annexed into the Town subsequent to the effective date of the ordinance codified in this Chapter, prospective land developers will be required to provide to the Town a map of riparian habitats, as identified by a qualified professional, which may exist on the property proposed for development. If it is determined that riparian habitat areas do exist, the Riparian Habitat Maps shall be updated to reflect these findings.

If identified riparian areas do occur on a site, the applicant must make a decision as to whether encroachment will, or must, occur within it.

1. In the event that the applicant commits to no encroachment into the designated riparian habitat, and to preservation/re-vegetation of the required fifteen (15) foot apron area around the entire riparian habitat (see subsection B.2 of this section for further clarification), the requirement for a Riparian Habitat Study may be waived. However, the applicant must commit, in writing, to erecting temporary fencing (see subsection D.2 of this section) around the entire habitat and said fencing shall be placed prior to any grubbing, grading or construction occurring on the project site. The fencing shall remain in place until all construction has been completed.

2. If it is determined that encroachment into identified riparian areas is to occur, a Riparian Habitat Study and Mitigation Plan must be prepared in accordance with submittal requirements established by the Planning and Zoning Administrator. Said study and plan must accompany any application for development (i.e., rezoning, conditional use permit, development plan and/or subdivision plat).

a. Riparian Habitat Studies and Mitigation Plans shall be reviewed by the Planning and Zoning Administrator or his/her designee as part of the development review process (rezoning, preliminary plat, or development plan). It shall be within the purview of the Administrator to call upon a qualified professional(s) with expertise in the field of vegetation preservation to assist in the review process. If outside expertise is required, the applicant will be required to set up an account which will pay for such services.

b. In addition to meeting all mitigation requirements set forth within Table 24-7: Town of Oro Valley Riparian Habitat Mitigation Standards, the following factors shall also be taken into consideration when evaluating the Mitigation Plan:

i) Amount and quality of the riparian area to be disturbed;

ii) Prior site disturbance, if any;

iii) Contiguity of the habitat;

iv) Presence of special status animal species inhabiting or traveling through the area in a riparian habitat area, as determined by the Arizona Game and Fish Department;

v) Upstream and downstream characteristics of designated washes;

vi) Alternative site designs which could minimize encroachment;

vii) Consideration of any other information or substantiation as may be provided by the applicant relative to the need for, and extent of, the proposed encroachment;

viii) An assessment of the applicant’s compliance with the prescribed standards for mitigation, as set forth within Table 24-7: Town of Oro Valley Riparian Habitat Mitigation Standards;

ix) A comparison of the Mitigation Plan with the study of existing conditions; i.e., the composition of the vegetative community, as set forth in the Riparian Habitat Study for the site; and

x) An assessment of the applicant’s plans to compensate for the impact.

c. No permits for grubbing or grading may be issued, nor can a plant salvage operation commence, prior to the Administrator’s approval of the Riparian Habitat Study and, if applicable, the Mitigation Plan, unless the Planning and Zoning Administrator determines that the proposed grubbing, grading or salvage will not impact a protected wash.

A mitigation bond, separate from the required restoration bond, must be posted prior to any site disturbance. Said bond shall be in an amount equal to one hundred twenty percent (120%) of the landscape materials and labor required to restore the area and one hundred twenty percent (120%) of the cost to irrigate the new plant materials for a period of five (5) years.

Item	Hydro-/Meso-Riparian	Xero-Riparian A	Xero-Riparian B	Xero-Riparian C
Trees (Canopy)	90 trees/ac., 50% 30" boxed, 25% 24" boxed and 25% 15 gal.	75 trees/ac., 75% 24" boxed, 25% 15 gal.	60 trees/ac., 50% 24" boxed, 50% 15 gal.	45 trees/ac. 25% 24" boxed, 75% 15 gal.
Shrubs (Mid-Story)	200 shrubs/ac., min. 5 gal.	175 shrubs/ac., 75% 5 gal., 25% 1 gal.	135 shrubs/ac., 75% 5 gal., 25% 1 gal.	100 shrubs/ac., 50% 5 gal., 50% 1 gal.
Seeding (Understory)	Hydroseed entire disturbed area with Mix A*	Hydroseed entire disturbed area with Mix B*	Hydroseed entire disturbed area with Mix B*	Hydroseed entire disturbed area with Mix B*
Grading/ Erosion Control	Grading shall facilitate collection and retention of stormwater runoff.**	Grading shall facilitate collection and retention of stormwater runoff.**	Grading shall facilitate collection and retention of stormwater runoff.**	Grading shall facilitate collection and retention of stormwater runoff.**
Irrigation	All transplanted, salvaged and nursery stock trees and shrubs shall be watered via an automatic drip irrigation system, to be maintained in good working order.	All transplanted, salvaged and nursery stock trees and shrubs shall be watered via an automatic drip irrigation system, to be maintained in good working order.	All transplanted, salvaged and nursery stock trees and shrubs shall be watered via an automatic drip irrigation system, to be maintained in good working order.	All transplanted, salvaged and nursery stock trees and shrubs shall be watered via an automatic drip irrigation system, to be maintained in good working order.
Maintenance	***	***	***	***
* It may be necessary to adjust seed mix, based on season, to assure germination. Harvesting of run-off outside the mitigation area is encouraged, if consistent with applicable codes. * All mitigation plans must include the following statement/commitment: “The project owner, and/or his successors, agree to preserve and protect the mitigation area for the duration of the project. Further, said project owner, or his successors, agree to actively maintain the mitigated area for a period of not less than five years. Maintenance activities shall include, but not be limited to, the regular operation of the irrigation system, the replacement of dead trees, and the removal of non-indigenous, invasive plant species.”

((O)11-15 , 05/18/11)

a. Any land area located within an identified riparian habitat, per the adopted maps, or the required fifteen (15) foot apron area surrounding it in its entirety, shall be placed in a common area and shall be labeled as a conservation easement. An association, with adopted covenants, shall be formed to assure the perpetual protection, preservation, and maintenance of said easement or common area. Recorded conservation easements must be approved by the Town Attorney, and shall be enforceable by the Town of Oro Valley.

b. For residential development within the R1-20, R1-36, R1-43, and R1-144 Districts, individual lots may be platted to include riparian areas; provided, that a conservation easement is recorded across those areas. Said conservation easement must be approved by the Planning and Zoning Administrator and the Town Attorney and may be enforced by either the Town or a homeowners’ association. The conservation easement must prohibit construction, clearing of vegetation, ground disturbance, and alteration of topography, regardless of amount.

a. Temporary fencing shall be erected to protect identified riparian habitat areas. Said fencing shall be erected on the exact boundary line of the habitat area, as identified via map and survey. Said fencing must be wildlife friendly (per Arizona Game and Fish) and shall be of a type and material approved by the Town’s Zoning Inspector. Said fence must clearly and conspicuously delineate any area on the site which is to remain in a natural state, pursuant to the approved plans. Barbed wire may be used only in open range locations. If barbed wire is used within one hundred (100) yards of a riparian habitat, the bottom and top wires shall be twelve and one-half (12 1/2) gauge barbless wire and clearance underneath such wire fence shall be a minimum of sixteen (16) inches. Wire fencing used elsewhere to protect apron and riparian habitat areas shall be limited to stranded wire.

b. Temporary fencing must be installed and inspected by the Town’s Zoning Inspector prior to any site disturbance.

c. Temporary fencing may be removed only upon completion of construction, as verified by the Town Zoning Inspector.

d. The requirement for temporary fencing may be waived by the Planning and Zoning Administrator if a grading plan demonstrates that the fenced building envelope will satisfy the requirements, or meet the intent, of this section.

Up to five (5) percent of the regulated habitat may be disturbed, at the discretion of the Town Engineer and Planning and Zoning Administrator; however, no approval for such disturbance may be given until all other design options for installation of essential infrastructure have been thoroughly explored and a Mitigation Plan for the affected area(s) has been approved. If restoration of the destroyed habitat is not possible, based upon required paving, drainage structures, or for access to utilities for maintenance purposes, another area, on-site only, may be used to fulfill the mitigation requirements, as approved by the Planning and Zoning Administrator, on an acre for acre basis.

No walls, fences, or other barriers may be located so as to impede wildlife movement through designated riparian habitats. (See subsection D.2 of this section for fencing criteria.)

All outdoor lighting shall conform to Oro Valley’s Outdoor Lighting Code, Section 27.5.

It shall be unlawful for any developer, or subsequent property owner, to discharge, or deposit, any chemical, chemical-carrying liquid, including swimming pool discharge, or any dangerous substance into a protected riparian habitat or its surrounding fifteen (15) foot apron area. Any person found guilty of such violation may be prosecuted in accordance with Section 30.2.

((O)11-15, Amended, 5/18/11)

Certain modifications to the development standards of any zoning district may be granted, if deemed appropriate, for properties which include identified riparian habitats. Such modifications may be granted only at the discretion of the Town Council and only in the following cases:

a. When encroachment into regulated habitat areas would be unnecessary if the modification were to be granted, and

b. When it is determined by the Planning and Zoning Administrator, based on a review of the plat or plan, the Riparian Habitat Study and the Mitigation Plan, that development within identified riparian areas cannot be reasonably avoided, and replacing and/or recreating the habitat is not an option.

Development standards in any zoning district including, but not limited to, the following may be modified as a part of the development (rezoning, subdivision plat or development plan) approval process:

Modifications to the building setbacks (up to twenty percent (20%) of the required setback of the zoning district) and/or distance between buildings.

Minimum lot sizes in all R1, R-4, R-S and SDH-6 districts may be modified; however, such lot size modifications are available only where an area of riparian habitat and undisturbed natural areas will be owned by a homeowners’ association, in common area, and preservation in a natural state is guaranteed through recorded covenants running with the land, which are enforceable by the Town of Oro Valley.

The sum total of square feet by which the area of each lot in the subdivision is reduced shall not exceed the total square footage of the preserved area. Said reduction in lot size shall not result in a density which exceeds that permitted by the zoning district, as provided in a calculation based on the adjusted gross acreage.

Residential lots may be reduced in size, but may not be smaller than the minimum lot areas set forth below:

District	Minimum Lot Size
R1-144	115,000
R1-43	36,000
R1-36	28,000
R1-20	16,000
R1-10	8,000
R1-7	6,000
SDH-6	5,500
R-4	5,000
R-S	5,000

When modified, smaller lot sizes are approved for use, said sub-standard sized lots must be placed as far away from riparian habitats as feasible and special consideration shall be given to providing the largest lots in the subdivision adjacent to the protected habitat areas.

c. Off-Street Parking. Off-street parking requirements may be modified, provided it can be demonstrated that such modification will not result in a danger to persons or property, or in increased traffic.

d. Other Modifications Permitted. Modifications to development standards not set forth herein may be requested, and may be granted by the Town Council, if modifications promote the preservation of natural areas and do not violate statutes, development agreements, appeal processes, or other provisions of this Code.

Modifications to development standards may be granted at the rezoning stage and conditional use permit, upon recommendation by the Planning and Zoning Commission and approval by Town Council, or, if associated with a plat or site plan, Town Council approval may be given upon recommendation by the Planning and Zoning Commission.

((O)17-05 , 06/07/17; (O)11-15 , 05/18/11)

Per Section 21.6, any requests for variance to the provisions of this section must be granted by the Board of Adjustment. In addition to the findings required in Section 22.13, the Board of Adjustment must also find that:

1. Approval of the variance will not adversely impact the identified riparian habitat, by allowing destruction of same, or

2. The developer has committed to, and submitted, a mitigation plan which conforms to all requirements of subsection C of this section, which has been approved, with or without modifications, by the Town Council.

III. Definitions in Effect Prior to Implementation of the Environmentally Sensitive Lands Ordinance on 7/19/11 (formerly codified in Chapter 31)

Shall mean the area within the Hillside District that is set aside for conservation of permanent natural open space, the conditions of which are identified in Section24.2.C. Hillside Conservation Area designations may apply toward the natural area requirement of Section 24.2.

When used in relation to natural terrain, means a relatively narrow elevation, which is prominent on account of the steep angle at which it rises; an elongated crest or series of crests, with or without peaks, significantly higher than the adjoining ground.