Narrative

StoneHaven – Phase 2A 
 
Pre-Plat 
 
Narrative 
 
Southeast Corner of 91st Avenue and Montebello Avenue 
Glendale, Arizona 
 
Vicinity Map: 
 
 
 
December 19, 2019 
 
Prepared for: 
Pulte Group 
16767 N Perimeter Dr.,Suite 100 
Scottsdale AZ 85260 
 
Prepared by: 
HILGARTWILSON 
2141 E. Highland Avenue, Suite 250 
Phoenix, Arizona 85016 
Telephone: 602.490.0535 
Contact: David W. George, P.E. 
 
Glendale Number 
Date Submitted 
Date Approved

StoneHaven Pre-Plat Narrative 
Page 2 
StoneHaven 
Phase 2A 
 
Narrative Report Table of Contents 
 
Narrative: 
 
 
 
 
 
 
 
 
Page Number 
I. 
Project Description 
3 
II. 
Public Utilities and Services 
4 
1. Water Facilities 
1.1 Existing Water Conditions 
4 
1.2 Proposed Water 
4 
 
2. Wastewater Facilities 
2.1 Existing Wastewater Conditions 
4 
2.2 Proposed Wastewater 
5 
 
3. Dry Utilities 
5 
III. 
      Drainage  
1. Offsite  
6 
2. Onsite  
6 
IV. 
      Open Space and Trails  
1. Open Space 
7 
2. Trails  
7

StoneHaven Pre-Plat Narrative 
Page 3 
 
 
I. 
Project Description 
 
 
StoneHaven is an approximately 395-acre property located in Glendale, 
Arizona at the northeast corner of 91st Avenue and Camelback Road.  The 
property is a portion of Section 15 of Township 2 North, Range 1 East.  
StoneHaven consists of four phases (1, 2A, 2B & 3) with Phase 1 having 
recorded final plats and map of dedications for Cardinals Way, Montebello 
Avenue and 87th Avenue north of Montebello.  Grading activities for Phase 1 
and Cardinals Way are currently underway.  The property is owned by John F 
Long and Pulte Group is the developer.  A Planned Area Development (PAD) 
application for StoneHaven was approved by the City of Glendale on June 27, 
2017. 
 
StoneHaven is located within the City of Glendale planning area and is situated 
at the eastern edge of the City’s Sports and Entertainment District and has 
been used for agricultural production for nearly a century.  The surrounding 
land uses include single-family residential, educational (high school and 
elementary sites), public parks, commercial sites, agricultural, and the State 
Farm Stadium (located to the northwest). Primary ingress and egress points will 
include 87th Avenue at Cardinals Way, Montebello Avenue at 91st Avenue, and 
Camelback Road at 87th Avenue.  Additional gated access to the eastern 
portion of the Project is provided from 83rd Avenue south of Cardinals Way.   
The StoneHaven Phase 2A (Project) as presented in this narrative will consist 
of one single-family residential parcel (Parcel 12) of approximately 21.85 acres.  
Parcel 12 is currently zoned SHD-4.5 PAD and will provide 112 lots. Access to 
Parcel 12 will be provided from 89th Avenue south of Montebello Avenue.  The 
typical lot size will be 45 ft wide by 110 ft deep and the minimum lot area is 
4,500 square feet.  However, the minimum lot area maybe reduced up to 28 SF 
at roadway intersections, knuckles and cul-da-sac returns due to chamfering at 
the corner of the lot. 
The Project will provide approximately 3.61 acres of open space area and will 
provide public roadways and public water and sewer services.

StoneHaven Pre-Plat Narrative 
Page 4 
II. 
Public Utilities and Services 
 
1. 
Water Facilities 
 
1.1 Existing Water Conditions 
 
StoneHaven is located entirely within the City of Glendale Water Service 
Area.  Existing water infrastructure immediately adjacent to the 
StoneHaven includes existing 12-inch water mains in Missouri Avenue 
(west of 87th Avenue), 83rd Avenue, 87th Avenue, 91st Avenue, and 
Camelback Road (east of 87th Avenue) and an 8-inch water main in 
Camelback Road (west of 87th Avenue).  Additional area water facilities 
include a 6-inch water main along eastside of 83rd Avenue from Bethany 
Home Road to Missouri Avenue and a 24-inch water main along the south 
side of the Grand Canal Linear Park from 87th Avenue to 83rd Avenue.   
 
1.2 Proposed Water 
 
The Project’s 112 single-family residential units will be served by an 
internal network of looped 8-inch waterlines which will connect to 12-inch 
waterlines that are being installed with Phase 1 improvements, specifically 
in Montebello Avenue and 89th Avenue.  The 12-inch waterlines within 
StoneHaven Phase 1 will make two connections to the existing 12-inch 
water main in 91st Avenue and one connection to the existing 12-inch 
water main in 83rd Avenue.  
 
2. 
Wastewater Facilities 
 
2.1 Existing Wastewater Conditions   
 
StoneHaven is located entirely within the City of Glendale Wastewater 
Service Area.  Existing wastewater infrastructure immediately adjacent to 
StoneHaven includes a 24-inch sewer main along 91st Avenue, a 48-inch 
sewer main along Camelback Road, a 10-inch sewer main along 87th 
Avenue, and a 21-inch sewer main along 83rd Avenue.  
The existing sewer mains within 91st Avenue, 87th Avenue, and 83rd 
Avenue all convey wastewater flows south toward Camelback Road where 
an existing 48-inch sewer main conveys wastewater flows westward to 
91st Avenue and intersects with an existing 24-inch sewer main from the 
north. Wastewater flow continues westerly in Camelback Road as a 48-
inch sewer main to a diversion structure which directs 5.8 MGD to the 
City’s 98th Avenue pump station and 8.9 MGD is directed to the 91st 
Avenue Wastewater Treatment Plant.

StoneHaven Pre-Plat Narrative 
Page 5 
2.2 Proposed Wastewater 
 
The Project’s 112 lots will be served by an internal network of gravity 
sewer mains primarily consisting of 8-inch sewer lines.  The gravity sewer 
mains will drain to a sanitary sewer lift station to be located on the 
eastside of 91st Avenue, north of the existing SRP well site.  This lift 
station will be completed with Phase 1 improvements.  The gravity sewer 
system and lift station facilities will be owned and operated by the City of 
Glendale.  The lift station has been designed to accommodate the 
StoneHaven 1,362 single-family lots and will discharge to a 12-inch gravity 
pipe which discharges to the existing 24-inch pipe in 91st Avenue.   
 
3. 
Dry Utilities  
 
Dry utility services for the StoneHaven development will include phone 
service by CenturyLink, natural gas service by Southwest Gas, cable 
service by Cox Communications and electric service by SRP.   
Existing overhead electric lines adjacent to the site include a 12 KV line on 
the east side of 91st Avenue, which will be undergrounded, a 69 KV line on 
the north side of Camelback Road, which will remain in place (except as 
needed to accommodate the 87th Avenue intersection), and 69 KV line on 
the north side of Cardinals Way, which will remain in place.

StoneHaven Pre-Plat Narrative 
Page 6 
III. 
Drainage 
 
1.     Offsite 
 
The StoneHaven site and surrounding area generally slopes in a 
southwesterly direction. Historically, offsite drainage approached the 
Project as sheet flow, generated from the watershed areas east and north 
of the Project. Today, the Grand Canal Linear Park located along the 
Cardinals Way alignment and established residential subdivisions located 
east of the StoneHaven obstruct flows and prevent them from reaching the 
site. Parcel 12 grading was included with the StoneHaven Phase 1 
grading plan. Also included was the grading of Montebello Avenue which 
is adjacent to the Project to the north, and 87th Avenue which is adjacent 
to the Project on the east side. As a result, the Project is not impacted by 
significant offsite flows. 
2. 
Onsite 
 
The proposed onsite stormwater management concept for StoneHaven 
residential and open space parcels consists of grading the lots to drain 
from the backyard to the streets, and the streets to drain toward a series 
of surface retention basins (located within the open space tracts).  Street 
conveyance shall occur as either surface flow within the right-of-way or in 
a system of underground storm drains.   
The stormwater retention basins will have sufficient capacity to retain 
runoff from the 100-year 2-hour storm event.  In some situations a 
retention basin may not provide the required storage volume.  In these 
instances the excess stormwater will be conveyed to the next downstream 
retention basin which will be sized to account for this volume transfer.  
This downstream conveyance will be accomplished through structures 
such as culverts, weirs, conveyance channels, and spillways or 
combinations of these structures.  Appropriate erosion protection will be 
placed in locations as needed to protect the stormwater management 
facilities.  The StoneHaven project will provide within the project 
boundaries, the stormwater storage volume necessary to satisfy City of 
Glendale requirements.    
The 100-year post development runoff for locations where flows exit the 
StoneHaven project will not exceed the pre-developed runoff conditions 
and the ultimate site outfall points will be at southwestern corner of the 
property with outfalls on 91st Avenue and Camelback Road.  All finished 
floor elevations will be set a minimum of 12 inches above the high 
adjacent 100-year water surface elevation and 14 inches above the 
emergency overflow elevation of any adjacent retention basin.  Drainage 
design will be conducted in accordance with all applicable City of Glendale 
and Maricopa County Drainage standards and regulations.

StoneHaven Pre-Plat Narrative 
Page 7 
IV. Open Space and Trails 
 
1. Open space 
 
The Project will provide approximately 3.61 acres of open space and will 
be served by the 9.6 acre Parcel 14 community park being completed with 
Phase 1.  
 
2. Trails 
 
StoneHaven will provide a comprehensive trail and pedestrian circulation 
system, providing non-motorized access throughout the community.  A 
primary pedestrian path, six-feet in width, will be provided through the 
major linear open space corridor within the center of the community, 
providing additional connections to each development parcel and the 
major amenities within StoneHaven.