DMP2021004 BOS REPORT_REV_PART1.PDF

Maricopa County — Formal (2022-04-20)

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April 20, 2022 
DMP2021004 
Page 1 of 5 
Report to the Board of Supervisors 
Prepared by the Maricopa County Planning and Development Department 
 
 
 
Board Hearing Date: 
April 20, 2022 
 
Case #/Title:   
 
 
DMP2021004 – Hidden Waters Ranch 
 
Supervisor District: 
4 
 
Applicant/Owner:  
Kyle Barichello, RVI Planning & Landscape Architecture / 339th 
and I-10 LLC 
 
Request: 
Development Master Plan Major Amendment of approx. 200 
acres of the Hidden Waters Ranch DMP (ref: DMP2006007). 
 
 
Site Location: 
Generally located south of the I-10 between 339th Ave. and 
351st Ave. and north of Buckeye Rd. 
 
Site Size: 
Approximately 200 acres 
 
County Island Status: 
N/A 
Additional 
Comments: 
The applicant is amending the Hidden Waters Ranch DMP to 
change the land use designation of approx. 200 acres from 
Small-Lot Residential to Industrial/Employment Center. The 
existing 
DMP 
is 
approx. 
48% 
designated 
for 
Industrial/Employment uses and the request seeks to create 
more uniform land use patterns. The site is located within the 
Tonopah/Arlington Area Plan designated as rural (0-1 
d.u./ac.) and community retail. 
 
Staff has received one (1) letter of opposition from a resident 
located with 300’ of the subject site. The individual noted 
general opposition to any new development in the area. 
There are no outstanding concerns from reviewing agencies, 
and staff believes that the proposed DMP Major Amendment 
will not have an adverse impact on the area plan or County 
Comprehensive Plan.  
 
Commission  
 
Recommendation: 
On 3/24/22, the Commission voted 7-0 to recommend 
approval of DMP2021004 subject to conditions ‘a’ – ‘p’:  
 
a. 
Development shall be in substantial conformance with the Development Master 
Plan document entitled “Hidden Waters Ranch Development Master Plan Major 
Amendment #2”, a bound document, dated revised February 10, 2022, and

April 20, 2022 
DMP2021004 
Page 2 of 5 
stamped received, including the exhibits, maps, and appendices, except as 
modified by the following stipulations. 
 
b. 
Changes to the Hidden Waters Ranch Development Master Plan with regard to 
use and intensity, or changes to any of the stipulations approved by the Maricopa 
County Board of Supervisors, shall be processed as a revised application with 
approval by the Board of Supervisors upon recommendation by the Maricopa 
County Planning and Zoning Commission. Revised applications shall be in 
accordance with the applicable Development Master Plan Guidelines, 
subdivision regulations, and zoning ordinance in effect at the time of 
application(s) submission. The Maricopa County Planning and Development 
Department may approve minor changes administratively as outlined in the 
Maricopa County Development Master Plan Guidelines in effect at the time of 
amendment. Non-compliance with the approved Hidden Waters Ranch 
Development Master Plan narrative report, maps, and exhibits, or the stipulations 
of approval will be treated as a violation in accordance with the provisions of the 
Maricopa County Zoning Ordinance. 
 
c. 
All stipulations of approval shall remain in effect in the event of a change in name 
of the Hidden Waters Ranch Development Master Plan. 
 
d. 
The property owner and their successors waive claim for diminution in value if the 
County takes action to rescind approval of this Development Master Plan due to 
noncompliance with any of the approved stipulations. 
 
e. 
Prior to approval of any zone change, the master developer shall enter into a 
development agreement with Maricopa County. Further, prior to approval of any 
zone change this development agreement shall be signed by both the master 
developer and the designated Maricopa County representative(s) and provided 
to the Maricopa County Planning and Development Department for public 
record. 
 
f. 
The master developer shall be responsible for the construction of all public and 
private on-site roads within the Hidden Waters Ranch Development Master Plan. 
Further, the Hidden Waters Ranch homeowners association shall be responsible for 
the maintenance and upkeep of all private roads, public open spaces and public 
facilities, washes, parks, roadway median landscaping, landscaping within public 
rights-of-way, and all pedestrian, bicycle, and multi-use paths. 
 
g. 
Prior to approval of each final plat, the master developer shall submit to the 
Maricopa County Planning and Development Department a landscape inventory 
and salvage plan which identifies and assesses the native vegetation within the 
development parcels, and which determines the preservation/disposition for 
each of the selected native vegetation. 
 
h. 
Landscaping of all common areas and open spaces, except for identified 
recreational areas, within Hidden Waters Ranch shall consist of indigenous and 
near-native plant species of a xeriphytic nature. 
 
i. 
Until annexation of the entire development master plan takes place, the master 
developer shall notify all future Hidden Waters Ranch Development Master Plan

April 20, 2022 
DMP2021004 
Page 3 of 5 
residents that they are not located within an incorporated city or town, and 
therefore will not be represented by, or be able to petition a citizen-elected 
municipal government. Notification shall also state that residents will not have 
access to municipally-managed services such as police, fire, parks, water, 
wastewater, libraries, and refuse collection. Such notice shall be included on all 
final plats, be permanently posted on the front door of all home sales offices on 
not less than an 8 ½ inch by 11 inch sign, and be included in all homeowner 
association covenants, conditions, and restrictions (CC & Rs). 
 
j. 
All park facilities shall be completed concurrently with residential development of 
the respective plat on which the park is shown. 
 
k. 
One (1) elementary school site dedication at a minimum of 14.3 acres. shall be 
reserved for the Saddle Mountain Unified School District at the location identified 
on the Hidden Waters Ranch land use plan. If at a future date State Land areas 
adjacent to the amended areas of the DMP are rezoned from residential to 
industrial use, SMUSD leadership may agree to reduce or eliminate the school 
reservation. 
 
l. 
The following Maricopa County Department of Emergency Management 
stipulations shall apply: 
 
1. 
Any areas not covered by the existing Outdoor Warning Siren System used 
to alert residents within the 10-mile Emergency Planning Zone of the Palo 
Verde Nuclear Generating Station in time of emergency shall be required 
to include additional sirens, at the developer’s cost, in order to provide 
adequate warning for the residents of that development, using technical 
information concerning the siren system obtained from the Emergency 
Planning Department at the Palo Verde Nuclear Generating Station. In 
addition, adequate signage available from the Palo Verde Nuclear 
Generating Station Emergency Planning Department shall be required to 
be posted on the site to inform the public of the presence of a nuclear 
generating station in the vicinity and outlining actions to take upon 
receiving warning notification. 
 
2. 
The developer shall ensure that public safety information regarding nuclear 
emergencies is initially provided to any new residents or building 
occupants. The applicant shall obtain this information from the Palo Verde 
Nuclear Generating Station – Emergency Planning Department. All costs 
associated with the duplication and dissemination of the initial distribution 
shall be assumed by the applicant. Thereafter, the Palo Verde Nuclear 
Generating Station will provide this public safety information annually. 
 
m. 
The following Flood Control District of Maricopa County stipulations shall apply: 
 
1. 
The owner or his representative shall submit a Conditional Letter of Map 
Revision prior to any preliminary plat approvals. 
 
n. 
The following Engineering stipulations shall apply:

April 20, 2022 
DMP2021004 
Page 4 of 5 
1. 
All development and engineering design shall be in conformance with the 
Drainage Regulation and current policies, standards and best practices at 
the time of application for construction. No variance from Drainage 
Regulations or drainage engineering design standards is granted or entitled 
under this DMP. 
 
2. 
Drainage review of planning, zoning and/or Development Master Plans 
cases is for conceptual design only and does not represent final design 
approval nor shall it entitle applicants to future designs that are not in 
conformance with Drainage Regulation and design policies and standards. 
Modeling submitted with this DMP is for conceptual level analysis only. All 
plats shall be submitted with appropriate and detailed model to reflect 
existing and proposed development conditions. 
 
3. 
Without the submittal of a precise plan of development, no development 
approval is inferred by this review, including, but not limited to drainage 
design, access and roadway alignments. These items will be addressed as 
development plans progress and are submitted to the County for further 
review and/or entitlement. 
 
4. 
Any development must ensure that historic drainage patterns are 
maintained at the up and downstream limits of development. 
 
5. 
A traffic impact study must be submitted with any future entitlement 
application(s) (i.e. preliminary plat or plan of development) for the purpose 
of determining any offsite roadway improvements. 
 
6. 
Changes to previous right-of-way dedication requirements for Section Line 
and Mid-Section Alignments within the development site will be further 
evaluated at the time of future entitlement applications. 
 
7. 
Any development must provide for at least two (2) paved points of access 
to existing and improved public roads. 
 
8. 
Except as modified as part of this application or stipulated herein, the 
Drainage, Flood Control and Transportation (MCDOT) conditions of 
DMP2008006 shall remain in effect. 
 
9. 
Applicant to notify ADOT of proposed development through the Red Letter 
Process, RedLetter@azdot.gov,  due to proximity and proposed access to 
I10 and the future I11 corridor. 
 
10. 
All development and engineering design shall be in conformance with 
Section 1205 of the Maricopa County Zoning Ordinance; Drainage Policies 
and Standards; Floodplain Regulations for Maricopa County; MCDOT 
Roadway Design Manual; and current engineering policies, standards and 
best practices at the time of application for construction. 
 
o. 
The following Luke Air Force Base condition shall apply:

April 20, 2022 
DMP2021004 
Page 5 of 5 
1. 
The master developer shall notify future occupants/tenants that they are 
located near a military airport with the following language: 
 
“You are locating in a residential dwelling outside the “territory in the vicinity 
of a military airport,” however aircraft flying in this area are authorized to fly 
as low as 1,500 feet above the ground. You will be subject to direct 
overflights and noise by Luke Air Force Base jet aircraft in the vicinity. 
 
Luke Air Force Base executes an average of approximately 165 overflights 
per day. Although Luke’s primary flight paths are located within 20 miles 
from the base, jet noise will be apparent throughout the area as aircraft 
transient to and from the Barry M. Goldwater Gunnery Range and other 
flight areas. 
 
Luke Air Force Base may launch and recover aircraft in either direction off 
its runways oriented to the southwest and northeast. Noise will be more 
noticeable during overcast sky conditions due to noise reflections off the 
clouds. 
 
Luke Air Force Base’s normal flying hours extend from 7:00 a.m. until 
approximately midnight, Monday through Friday, but some limited flying will 
occur outside these hours and during most weekends. 
 
For further information, please check the Luke Air Force Base website or 
contact the Maricopa County Planning and Development Department.” 
 
Such notification shall be permanently posted on not less than a 3 foot by 
5 foot sign in front of all leasing and home sales offices and be permanently 
posted on the front door of all leasing offices on not less than 8½ inch by 11 
inch sign. 
 
p. 
At its discretion, the Maricopa County Planning and Development Department 
may administratively approve up to a 5% change in the gross area of any parcel 
that is subject to a planned area development zoning overlay. Such change, 
either individually or cumulatively, shall not result in a change of any land use 
category by 5% or greater. Changes greater than 5% either individually or 
cumulatively shall be processed as a revised application with approval by the 
Maricopa County Board of Supervisors upon recommendation by the Maricopa 
County Planning and Zoning Commission. 
 
 
 
Presented by: 
 
Jose Castañeda, Planner 
Reviewed by: 
 
Darren Gerard, AICP, Planning Manager   
 
Attachments: 
 
3/24/22 P&Z Packet (62 pages)  
 
3/24/22 P&Z Handout (10 pages) 
 
 
Note: 
3/24/22 Draft P&Z Minutes are not available as of the writing of this report, but can 
be provided upon request later when available.

DMP2021004 
Page 1 of 12 
Report to the Planning and Zoning Commission 
Prepared by the Maricopa County Planning and Development Department 
 
 
 
Cases: 
DMP2021004 - Hidden Waters Ranch 
 
Hearing Date: 
March 24, 2022 
 
Supervisor District: 
4 
 
 
 
  
 
Applicant: 
Kyle Barichello, RVI Planning & Landscape Architecture 
 
Owners: 
339th and I 10 LLC 
   
Requests: 
Development Master Plan Major Amendment of approx. 200 acres 
of the Hidden Waters Ranch DMP (ref: DMP2006007). 
 
  
 
Site Location: 
Generally located south of the I-10 between 339th Ave. and 351st 
Ave. and north of Buckeye Rd. 
 
  
Site Size: 
Approx. 200 acres 
 
Density: 
N/A 
 
County Island:  
No 
 
 
County Plan: 
Tonopah / Arlington  Area Plan – Rural Densities (0-1)  
 
Municipal Plan: 
N/A 
 
Municipal Comments: 
None received to date  
 
Support/Opposition: 
None known 
 
Recommendation: 
Approve with conditions

DMP2021004 
Page 2 of 12 
Project Summary: 
 
1. 
Hidden Waters Ranch is an existing DMP of approx. 1,314 acres located south of the I-10 
between 339th Ave. and 351st Ave. and north of Buckeye Rd. near the community of 
Tonopah. The DMP composition is primarily Industrial Employment Center designations 
which is 48.5% of the existing DMP. The remainder of the DMP is mostly comprised of Small 
Lot Residential, Mixed-Use Employment and Dedicated Non-Developable Open Space 
designations. The Hidden Waters Ranch DMP has areas that are owned by the State of 
Arizona and areas in private ownership. Staff notes that the requested amendment only 
comprises portions of the DMP under private ownership. The existing DMP was originally 
approved by the Maricopa County Board of Supervisors on October 1, 2007 under 
DMP2006007 and subsequently amended via DMP2008006 on January 16, 2009. 
 
2. 
The existing uses in the area primarily consist of undeveloped vacant land, sparse single-
family residential development, a truck stop on the SWC of the I-10 and 339th Ave. and 
the Belmont DMP located to the north of the subject site. The existing DMP is currently 
divided into two character areas with the area north of Van Buren to the I-10 designated 
for Industrial and the south half of the DMP from Van Buren St. to Buckeye Rd. consisting 
of small-lot residential land use designations. The overall zoning for the DMP is Rural-43, 
Rural-43 PAD, R1-7 RUPD PAD, R1-6 RUPD PAD, IND-2 PAD and R-2 RUPD PAD. The site is 
surrounded primarily by properties that are zoned Rural-43.  
 
Existing DMP exhibit

DMP2021004 
Page 3 of 12 
3. 
The applicant is proposing a Major DMP Amendment to an approximately 200-acre 
portion of the Hidden Waters Ranch DMP located south of Van Buren St. between 339th 
Ave. and 351st Ave. north of Buckeye Rd. as highlighted in the exhibit above. This area is 
currently designated primarily for residential uses, however the request would eliminate 
the residential designation on the highlighted portion of the site. According to the 
applicant the amendment would bring the southern half of the DMP in alignment with 
the previously approved changes to the north and match the existing Industrial and 
Employment Center (IEC) land use designations to the north. The applicant has also 
applied for a companion request to rezone the highlighted portion to IND-2 in order to 
facilitate the development of the site for industrial users. 
 
4. 
The items to be amended with the subject DMP include: 
 
 
DMP Amendment application to amend approximately 200 acres of privately 
owned land to change parcels A7-A11 from Small Lot Residential (SLR) to 
Industrial/Employment Center (IEC).  
 
 
Revise the proposed park space, elementary school, and SLR on A14, A15, and 
A18 due to the removal of the privately owned residential parcels. 
 
 
Revise the DMP’s parcel boundaries A14, A15, and A17 based on the current 
parcel ownership of the Hassayampa Utility Company.  
 
 
Remove the proposed spine N/S collector roadway between A7 and A8 and 
A9/A11 previously meant to serve residential development. This is subject to future 
evaluation per a Traffic Impact Analysis (TIA) as part of the site plan development 
process. 
 
 
Include an update to adjacent Hassayampa Utility-owned properties seeking a 
rezoning and DMP amendment per a separate application (DMP2020001 and 
Z2020085).  
 
 
Associated PAD Rezoning Amendment application for parcels A7-A11 and 
A17/A18 from various residential zoning to IND-2 PAD to match the existing 
industrial zoning entitlements.  
 
 
Modify and remove stipulations as needed to reflect the proposed DMP changes.  
 
5. 
The tables below and on the next page identify the proposed changes to the land use 
designations in bold. The proposed acreage is rounded to the nearest acre and shown 
on the site by area, and as a percentage of the total DMP. The applicant has also 
provided exhibits highlighting the proposed changes. 
 
6. 
DMP Land Use Designations: 
Legend 
Land Use Designations 
Existing 
Acreage 
Total % 
Proposed 
Acreage 
Total % 
SLR 
Small Lot Residential (2-5 du/ac) 
322.7 
24.58% 
148 
11% 
MDR 
Medium Density Residential (5-15 du/ac) 
29.6 
2% 
30 
2% 
UT 
Public Facilities (WWRF, Fire Dept.) 
41 
2.62% 
29 
2% 
EDU 
Elementary School 
16.6 
1.3% 
15 
1%

DMP2021004 
Page 4 of 12 
MUEC 
Mixed-Use Employment Center 
194.7 
15% 
195 
15% 
IEC 
Industrial Employment Center 
636.8 
48.5% 
823 
63% 
CRC 
Community Retail Center 
13 
1% 
13 
1% 
D/NDOS 
Dedicated Non-Developable Open  Space 
59.6 
5% 
60 
5% 
Totals 
1,314 
100% 
1,313 
100% 
 
7. 
Development Areas: 
Development 
 Unit 
Land Use 
Category 
Land Use Type 
Approx. 
Gross 
Area A: Private Land 
A1 
IEC 
Industrial 
12.9 
A2 
D/NOS 
Open Space 
15.8 
A3 
IEC 
Industrial 
130.8 
A4 
IEC 
Industrial 
40.1 
A5 
D/NDOS 
Open Space 
20.7 
A6 
IEC 
Industrial 
99.6 
A7 
IEC 
Industrial 
39.5 
A8 
IEC 
Industrial 
40.3 
A9 
IEC 
Industrial 
25.5 
A10 
IEC 
Industrial 
19.9 
A11 
IEC 
Industrial 
34.6 
A12 
IEC 
Industrial 
80.3 
A13 
IEC 
Industrial 
9.2 
A14 
EDU 
Educational 
14.3 
A15 
IEC 
Industrial 
16.8 
A16 
UT 
Utilities (Exception) 
28.7 
A19 
IEC 
Industrial 
24.1 
Area A: Totals 
653.5 
Area B: State Land 
B1 
MUEC 
Emp/Comm 
62.3 
B2 
IEC 
Industrial 
58.6 
B3 
MUEC 
Emp/Comm 
50.5 
B4 
MUEC 
Emp/Comm 
26.2 
B5 
D/NDOS 
Open Space 
3.0 
B6 
IEC 
Industrial 
29.1 
B7 
IEC 
Industrial 
34.2 
B8 
D/NDOS 
Open Space 
10.5 
B9 
IEC 
Industrial 
26.1 
B10 
IEC 
Industrial 
56.4 
B11 
IEC 
Industrial 
44.6 
B12 
PF 
Fire Station 
3.5 
B13 
MUEC 
Emp/Comm 
55.7 
B14 
D/NDOS 
Open Space 
9.6 
B15 
SLR 
Residential 
30.1 
B16 
SLR 
Residential 
40.0 
B17 
SLR 
Residential 
40.1 
B18 
CRC 
Commercial 
13.0 
B19 
MDR 
Residential 
29.6 
B20 
SLR 
Residential 
37.4 
Area B: Totals 
660.5 
Overall DMP Totals 
1,314

DMP2021004 
Page 5 of 12 
8. 
Existing DMP Land Use Exhibit 
 
 
9. 
Proposed DMP Land Use Exhibit

DMP2021004 
Page 6 of 12 
Existing On-Site and Adjacent Zoning / Land Use: 
 
10. 
On-site: 
 
Rural-43 PAD, R1-7 RUPD PAD, R1- 6 RUPD PAD, R-2 RUPD PAD / 
Vacant 
North: 
Van Buren St. then IND-2 PAD and Rural-43 / Vacant 
South: 
Buckeye Rd. then Rural-43 / Single-family residence and vacant 
East: 
Rural-43 RUPD PAD and Rural-43 / Horseshoe Trails Amended and 
 
Vacant 
West: 
Rural-43 / Vacant 
 
 
Utilities and Services: 
 
11. 
Water: 
 
Water Utility of Greater Tonopah 
Wastewater: 
Hassayampa Utilities Company 
School District: 
Saddle Mountain Unified School District 
Fire: 
Tonopah Valley Fire District 
Police:  
Maricopa County Sheriff’s Office  
 
Right-of-Way: 
 
12. 
The following table includes existing and proposed half-width right-of-way and the future 
classification based upon the Maricopa County Department of Transportation (MCDOT) 
Major Streets and Routes Plan. It should be noted that there are no improvements to the 
right-of-way proposed with the subject application, however the applicant will be 
required to coordinate with ADOT and MCDOT for any future offsite roadway 
improvements.   
 
Street Name 
Half-width Existing R/W 
Half-width Proposed R/W 
Future Classification 
Van Buren St. 
28’ 
N/A 
Principal Arterial 
Buckeye Rd. 
34’ 
N/A 
Parkway 
 
Adopted Plan: 
 
13. 
Tonopah/Arlington Area Plan (adopted September 6, 2000): The Tonopah/Arlington Area 
Plan designates the site for as rural (0-1 du/ac.) land uses and there is a portion of the 
DMP along the I-10 and 339th Ave designated as Community Retail Center. The proposed 
uses generally do not comply with this plan, however staff notes the existing Hidden 
Waters Ranch DMP (ref: DMP2008006) designated approx. 48% of the site as an 
Industrial/Employment Center and the requested amendment seeks to create more 
uniform land use designations within Hidden Waters Ranch. 
 
Public Participation Summary: 
 
14. 
The applicant complied with the Maricopa County Public Participation Process with the 
required posting of the property and notification to the adjacent property owners within 
300’ of the subject site and the area of interest groups. The public participation 
generated two  letters from the Arizona Fire & Medical Authority who indicated that they 
would be reaching out to the applicant to coordinate the fire and EMS needs for the 
project, and the Maricopa County Emergency Management noted no concerns. 
Additionally, staff received two letters from the Superintendent of the Saddle Mountain

DMP2021004 
Page 7 of 12 
Unified School District (SMUSD). SMUSD noted originally that they opposed the subject 
DMP amendment and related zone change. The opposition centered on preserving a 
school site that had been reserved for the SMUSD under the existing DMP when the site 
was originally intended to be primarily medium density residential. Staff forwarded the 
notice of opposition to the applicant and the applicant worked with the school district 
to preserve the school site reservation should it be needed. With this, the school district 
withdrew their opposition and provided confirmation to staff that they had no further 
concerns with the proposed amendment.  
 
15. 
In addition to the above public participation, the applicant and his project team held a 
virtual neighborhood meeting on December 13, 2021 which was attended by three 
residents of the area. The meeting summary was provided to staff as a part of the 
applicant’s Public Participation Plan. The meeting summary concluded with no concerns 
noted by the residents and it was noted that the proposed project was a potential 
positive for property values by one individual. Staff has not received any other letters and 
there is no known opposition.  
 
Outstanding Concerns from Reviewing Agencies: 
 
16. 
N/A. 
 
Staff Analysis: 
 
17. 
Staff is of the opinion that the proposed amendment is an improvement to the previously 
approved DMP. The amendment to eliminate the small lot residential where adjacent to 
industrial zoning improves the land use patterns of the DMP and provides a more uniform 
area for industrial uses that is located away from existing urban development. Staff 
believes the amended DMP will offer a substantial amount of employment uses to the 
area. As noted in this report, the site is located to the south of I-10 adjacent to the Belmont 
DMP which does offer significant residential land uses however, it does not provide for 
industrial uses. The proposed amendment would provide for a large employment area 
while the I-10 would provide a buffer between these uses and Belmont to the north. While 
the proposed land use designations are not entirely in line with the Tonopah/Arlington 
area plan, the proposed amendment is in line with certain policies, goals and objectives 
outlined in the plan such as: 
 
Objective L.1.b: “Create high quality residential, commercial, and industrial land 
developments that are compatible with adjacent land uses.” The amendment would 
create a more uniform land use on the site near potential residents while also having 
existing buffers between the uses such as the I-10 to the north of the site and state trust 
land to the west to buffer the industrial and residential uses. 
 
Policy L1.5: “Review development proposals along major streets and adjacent to existing 
and approved land uses to determine compatibility with those uses.” As noted previously 
the north half of the DMP is already designated for and zoned primarily as industrial and 
further the area plan designates a portion of the DMP along the I-10 and 339th Ave as a 
Community Retail Center. As such staff believes the amendment is compatible to the 
existing designations within the DMP and its relative location to the a major transportation 
corridor.

DMP2021004 
Page 8 of 12 
Policy L1.7: “Encourage light industrial development in the vicinity of the Palo Verde 
Nuclear Generating Station.” The DMP is located within 7-miles of the PVNGS and is in 
alignment with this policy. Further the site is within the 10-mile Plume Exposure Pathway 
Emergency Planning Zone (EPZ) and staff is of the opinion that amending the DMP to 
reduce the small-lot residential designation in the EPZ is sound planning. 
 
Policy ED1.3: “Discourage strip commercial development.” The proposed amendment 
would create a substantial amount of employment land uses within a large contiguous 
area.  
 
Policy ED1.11: “Encourage the construction of a high school in the Tonopah/Arlington 
planning area at such time that student population will support its existence.” The 
applicant has worked with the SMUSD to reserve an area within the DMP for future school 
use. 
 
18. 
Staff supports the request to amend the DMP to eliminate much of the residential 
designations located adjacent to the existing IND-2 zoning. Staff is of the opinion that the 
proposed amendment to increase the Industrial Employment Center is more in line than 
the existing designations that would allow for small lot development in an area that is 
sparsely developed. The amendment would create consistent land uses throughout the 
DMP and facilitate the creation of a large employment center with immediate access to 
the I-10 and adjacent to an area that is already designated as a Community Retail 
Center.  
 
Recommendation: 
 
19. 
Staff recommends the Commission adopt a motion recommending that the Board of 
Supervisors approve DMP2021004 subject to the conditions ‘a’ – ‘p’. 
 
a. 
Development shall be in substantial conformance with the Development Master 
Plan document entitled “Hidden Waters Ranch Development Master Plan Major 
Amendment #2”, a bound document, dated revised February 10, 2022, and 
stamped received, including the exhibits, maps, and appendices, except as 
modified by the following stipulations. 
 
b. 
Changes to the Hidden Waters Ranch Development Master Plan with regard to 
use and intensity, or changes to any of the stipulations approved by the Maricopa 
County Board of Supervisors, shall be processed as a revised application with 
approval by the Board of Supervisors upon recommendation by the Maricopa 
County Planning and Zoning Commission. Revised applications shall be in 
accordance with the applicable Development Master Plan Guidelines, 
subdivision regulations, and zoning ordinance in effect at the time of 
application(s) submission. The Maricopa County Planning and Development 
Department may approve minor changes administratively as outlined in the 
Maricopa County Development Master Plan Guidelines in effect at the time of 
amendment. Non-compliance with the approved Hidden Waters Ranch 
Development Master Plan narrative report, maps, and exhibits, or the stipulations 
of approval will be treated as a violation in accordance with the provisions of the 
Maricopa County Zoning Ordinance.

DMP2021004 
Page 9 of 12 
c. 
All stipulations of approval shall remain in effect in the event of a change in name 
of the Hidden Waters Ranch Development Master Plan. 
 
d. 
The property owner and their successors waive claim for diminution in value if the 
County takes action to rescind approval of this Development Master Plan due to 
noncompliance with any of the approved stipulations. 
 
e. 
Prior to approval of any zone change, the master developer shall enter into a 
development agreement with Maricopa County. Further, prior to approval of any 
zone change this development agreement shall be signed by both the master 
developer and the designated Maricopa County representative(s) and provided 
to the Maricopa County Planning and Development Department for public 
record. 
 
f. 
The master developer shall be responsible for the construction of all public and 
private on-site roads within the Hidden Waters Ranch Development Master Plan. 
Further, the Hidden Waters Ranch homeowners association shall be responsible for 
the maintenance and upkeep of all private roads, public open spaces and public 
facilities, washes, parks, roadway median landscaping, landscaping within public 
rights-of-way, and all pedestrian, bicycle, and multi-use paths. 
 
g. 
Prior to approval of each final plat, the master developer shall submit to the 
Maricopa County Planning and Development Department a landscape inventory 
and salvage plan which identifies and assesses the native vegetation within the 
development parcels, and which determines the preservation/disposition for 
each of the selected native vegetation. 
 
h. 
Landscaping of all common areas and open spaces, except for identified 
recreational areas, within Hidden Waters Ranch shall consist of indigenous and 
near-native plant species of a xeriphytic nature. 
 
i. 
Until annexation of the entire development master plan takes place, the master 
developer shall notify all future Hidden Waters Ranch Development Master Plan 
residents that they are not located within an incorporated city or town, and 
therefore will not be represented by, or be able to petition a citizen-elected 
municipal government. Notification shall also state that residents will not have 
access to municipally-managed services such as police, fire, parks, water, 
wastewater, libraries, and refuse collection. Such notice shall be included on all 
final plats, be permanently posted on the front door of all home sales offices on 
not less than an 8 ½ inch by 11 inch sign, and be included in all homeowner 
association covenants, conditions, and restrictions (CC & Rs). 
 
j. 
All park facilities shall be completed concurrently with residential development of 
the respective plat on which the park is shown. 
 
k. 
One (1) elementary school site dedication at a minimum of 14.3 acres. shall be 
reserved for the Saddle Mountain Unified School District at the location identified 
on the Hidden Waters Ranch land use plan. If at a future date State Land areas 
adjacent to the amended areas of the DMP are rezoned from residential to

DMP2021004 
Page 10 of 12 
industrial use, SMUSD leadership may agree to reduce or eliminate the school 
reservation. 
 
l. 
The following Maricopa County Department of Emergency Management 
stipulations shall apply: 
 
1. 
Any areas not covered by the existing Outdoor Warning Siren System used 
to alert residents within the 10-mile Emergency Planning Zone of the Palo 
Verde Nuclear Generating Station in time of emergency shall be required 
to include additional sirens, at the developer’s cost, in order to provide 
adequate warning for the residents of that development, using technical 
information concerning the siren system obtained from the Emergency 
Planning Department at the Palo Verde Nuclear Generating Station. In 
addition, adequate signage available from the Palo Verde Nuclear 
Generating Station Emergency Planning Department shall be required to 
be posted on the site to inform the public of the presence of a nuclear 
generating station in the vicinity and outlining actions to take upon 
receiving warning notification. 
 
2. 
The developer shall ensure that public safety information regarding nuclear 
emergencies is initially provided to any new residents or building 
occupants. The applicant shall obtain this information from the Palo Verde 
Nuclear Generating Station – Emergency Planning Department. All costs 
associated with the duplication and dissemination of the initial distribution 
shall be assumed by the applicant. Thereafter, the Palo Verde Nuclear 
Generating Station will provide this public safety information annually. 
 
m. 
The following Flood Control District of Maricopa County stipulations shall apply: 
 
1. 
The owner or his representative shall submit a Conditional Letter of Map 
Revision prior to any preliminary plat approvals. 
 
n. 
The following Engineering stipulations shall apply: 
 
1. 
All development and engineering design shall be in conformance with the 
Drainage Regulation and current policies, standards and best practices at 
the time of application for construction. No variance from Drainage 
Regulations or drainage engineering design standards is granted or entitled 
under this DMP. 
 
2. 
Drainage review of planning, zoning and/or Development Master Plans 
cases is for conceptual design only and does not represent final design 
approval nor shall it entitle applicants to future designs that are not in 
conformance with Drainage Regulation and design policies and standards. 
Modeling submitted with this DMP is for conceptual level analysis only. All 
plats shall be submitted with appropriate and detailed model to reflect 
existing and proposed development conditions. 
 
3. 
Without the submittal of a precise plan of development, no development 
approval is inferred by this review, including, but not limited to drainage

DMP2021004 
Page 11 of 12 
design, access and roadway alignments. These items will be addressed as 
development plans progress and are submitted to the County for further 
review and/or entitlement. 
 
4. 
Any development must ensure that historic drainage patterns are 
maintained at the up and downstream limits of development. 
 
5. 
A traffic impact study must be submitted with any future entitlement 
application(s) (i.e. preliminary plat or plan of development) for the purpose 
of determining any offsite roadway improvements. 
 
6. 
Changes to previous right-of-way dedication requirements for Section Line 
and Mid-Section Alignments within the development site will be further 
evaluated at the time of future entitlement applications. 
 
7. 
Any development must provide for at least two (2) paved points of access 
to existing and improved public roads. 
 
8. 
Except as modified as part of this application or stipulated herein, the 
Drainage, Flood Control and Transportation (MCDOT) conditions of 
DMP2008006 shall remain in effect. 
 
9. 
Applicant to notify ADOT of proposed development through the Red Letter 
Process, RedLetter@azdot.gov,  due to proximity and proposed access to 
I10 and the future I11 corridor. 
 
10. 
All development and engineering design shall be in conformance with 
Section 1205 of the Maricopa County Zoning Ordinance; Drainage Policies 
and Standards; Floodplain Regulations for Maricopa County; MCDOT 
Roadway Design Manual; and current engineering policies, standards and 
best practices at the time of application for construction. 
 
o. 
The following Luke Air Force Base condition shall apply: 
 
1. 
The master developer shall notify future occupants/tenants that they are 
located near a military airport with the following language: 
 
“You are locating in a residential dwelling outside the “territory in the vicinity 
of a military airport,” however aircraft flying in this area are authorized to fly 
as low as 1,500 feet above the ground. You will be subject to direct 
overflights and noise by Luke Air Force Base jet aircraft in the vicinity. 
 
Luke Air Force Base executes an average of approximately 165 overflights 
per day. Although Luke’s primary flight paths are located within 20 miles 
from the base, jet noise will be apparent throughout the area as aircraft 
transient to and from the Barry M. Goldwater Gunnery Range and other 
flight areas. 
 
Luke Air Force Base may launch and recover aircraft in either direction off 
its runways oriented to the southwest and northeast. Noise will be more

DMP2021004 
Page 12 of 12 
noticeable during overcast sky conditions due to noise reflections off the 
clouds. 
 
Luke Air Force Base’s normal flying hours extend from 7:00 a.m. until 
approximately midnight, Monday through Friday, but some limited flying will 
occur outside these hours and during most weekends. 
 
For further information, please check the Luke Air Force Base website or 
contact the Maricopa County Planning and Development Department.” 
 
Such notification shall be permanently posted on not less than a 3 foot by 
5 foot sign in front of all leasing and home sales offices and be permanently 
posted on the front door of all leasing offices on not less than 8½ inch by 11 
inch sign. 
 
p. 
At its discretion, the Maricopa County Planning and Development Department 
may administratively approve up to a 5% change in the gross area of any parcel 
that is subject to a planned area development zoning overlay. Such change, 
either individually or cumulatively, shall not result in a change of any land use 
category by 5% or greater. Changes greater than 5% either individually or 
cumulatively shall be processed as a revised application with approval by the 
Maricopa County Board of Supervisors upon recommendation by the Maricopa 
County Planning and Zoning Commission. 
 
 
 
 
Presented by: 
Jose Castañeda, Planner 
Reviewed by: 
Matthew Holm, AICP, Planning Supervisor 
 
Attachments: 
Case Map (1 page) 
 
Application (1 page) 
 
Land Use Plan (15 pages) 
 
Ex. Summary (2 pages) 
 
Citizen Participation Plan (20 pages) 
 
ENG comments (3 pages) 
 
MCESD comments (1 page) 
 
Saddle Mountain Unified School District (4 pages) 
 
AFMA Letter (1 page) 
 
MCEM (2 pages)

Maricopa County Planning & Development - Phoenix, AZ 
Maricopa County 
 
 
Application Name: Hidden Waters Ranch 
Legal Description: T1N R5W Pt. of Secs. 
4, 5, 6, 7, 8 
Supervisor District No. 4 
Applicant: Kyle Barichello, RVi 
Planning and Landscape Architecture 
Applicant Phone/ Email: (480) 586-
2358 / kbarichello@rviplanning.com 
Case Address: T.B.D 
Parcel Primary: 504-12-006P, 006S, 
006Z, 007, 008, 135, 137 
Acreage: approx. 200 
Case Number: DMP2021004

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Development Master Plan 
HIDDEN WATERS 
RANCH 
MARICOPA COUNTY, ARIZONA 
FIGURE 2 
On-Site 
Property Ownership 
LEGEND 
Amended DMP Area
State Land 
-■■- DMP Site 
On Site Parcel Owners 
PA.RCJ::L# 
OW.\JJ:::R 
A. 5()4.J 1-025 
:rw-H A'.'-JD 1-10 LLC 
504-11-009 
504-11-()()6-A 
504-11-007 
504-12-007 
504-12-008 
504-12-006-Z 
504-12-006-r 
504-12-135 
504-12-137 
504-12-006-S 
U. 504-12-134 
llASSA YAM.PA UHLJTY COMPA:-JY 1:-JC 
504-12-136 
C. 504-11-008-L 
K.AM. ARJLO:-.IA IIOMJ::S 'r1.'J::$f 
504-11-om;.M 
504-11-008-N 
504-11-om;.r 
504-11-008-Q 
504-11-008-R 
504-11-008-S 
504-11-00S-l' 
504-11-00&-.U 
504-11-008-V 
504-11-008-X 
504-11-008-L 
Note: Property cwnership information was obtained from 
the County of Maricopa Assessor Office. 
, 
NOT TO SCALE 
9 AVONDALE, AZ.. 
■2021-10-12 
# 20000830 
,il 339TH & 1-10 LLC 
l\fi
120 S. Ash Avenue 
Tempe, Arzona 85281 
Tel: 480.994.0994 
www.rviplmning.com

Ruth Fisher
Elementary School
Tonopah Valley Fire District
Station #341
Tonopah Valley
 High School
Buckeye Municipal
Airport
Palo Verde Nuclear
Generating Station
INTERSTATE HIGHWAY 10
INDIAN SCHOOL ROAD
VAN BUREN STREET
BUCKEYE ROAD
LOWER BUCKEYE ROAD
McDOWELL ROAD (ALIGNMENT)
TONOPAH-SALOME HWY
339th  AVE.
331st  AVE.
ROOSEVELT ROAD (ALIGNMENT)
355th AVE.
Maricopa County Sheriff
District 2 - Substation
100 N Apache Rd.
Buckeye, AZ 85326
(Location of station is approx. 10
miles from Proposed DMP site)
Maricopa County Library
Litchfield Park Branch
101 W Wigwam Blvd
Litchfield Park, AZ 85340
(Location of branch is approx. 13
miles from Proposed DMP site)
SITE
Winters Well
Elementary School
Development Master Plan
MARICOPA COUNTY, ARIZONA
FIGURE 3
Regional Facilities
Approximately Five (5) mile radius
Public Airport
Fire Station
Public School
Proposed DMP Site
LEGEND
Saddle Mountain Unified School District
Palo Verde School District
Arlington Elementary School District
hIDDEN WATERS
RANCh
120 S. Ash Avenue
Tempe, Arizona 85281
Tel: 480.994.0994
www.rviplanning.com
20000830
AVONDALE, AZ.
0
2500'
5000'
SCALE:  1" = 5000'-0"
2021-10-05
339TH & I-10 LLC

Development Master Plan 
H][DDEN WATERS 
RANCH 
MARICOPA COUNTY, ARIZONA 
FIGURE 5 
Municipal Boundaries
City of Buckeye 
 Proposed DMP Site 
Buckeye Planning 
Area Boundary 
,, 
0 
2500' 
5000' 
. .,  
SCALE: 1" = 5000'-0" 
9 AVONDALE, AZ.. 
■2021-10-05 
# 20000830 
.l 339TH & 1-10 LLC 
l\fi
120 S. Ash Avenue 
Tempe, Arizona 85281 
Tel: 480.994.0994 
www.rviplrnning.com

Dickey Wash
Unnamed Wash
Interstate Highway 10
Buckeye Rd
339th Ave
Van Buren St.
Inter
Development Master Plan
MARICOPA COUNTY, ARIZONA
FIGURE 6
Topography and Physical
Features
100-Year Floodplain
Boundary
Proposed DMP Site
Topography 2' Contours
hIDDEN WATERS
RANCH
120 S. Ash Avenue
Tempe, Arizona 85281
Tel: 480.994.0994
www.rviplanning.com
20000830
AVONDALE, AZ.
0
600'
1200'
SCALE:  1" = 1200'-0"
2021-10-05
339TH & I-10 LLC