2017-06-01 - Assessment of Adequacy of Public Services

63 Pages·2017·14.77 MB·English

by  Alison Gosling

120 Iber Road, Suite 103
Ottawa, Ontario K2S 1E9
Tel. [phone]
Fax [phone]
www.DSEL.ca

ASSESSMENT OF ADEQUACY OF
PUBLIC SERVICES
FOR
WINDMILL DEVELOPMENT GROUP
LTD.
1040 BANK STREET

CITY OF OTTAWA

MAY 2017 – REV 1
© DSEL

ASSESSMENT OF ADEQUACY OF PUBLIC SERVICES
FOR
WINDMILL DEVELOPMENT GROUP LTD.

1040 BANK STREET
TABLE OF CONTENTS
1.0 INTRODUCTION .................................................................................................. 1
1.1 Existing Conditions ............................................................................................... 2
1.2 Required Permits / Approvals ............................................................................... 3
1.3 Pre-consultation .................................................................................................... 3
2.0 GUIDELINES, PREVIOUS STUDIES, AND REPORTS ....................................... 4
2.1 Existing Studies, Guidelines, and Reports ............................................................ 4
3.0 WATER SUPPLY SERVICING ............................................................................ 5
3.1 Existing Water Supply Services ............................................................................ 5
3.2 Water Supply Servicing Design ............................................................................ 5
3.3 Water Supply Conclusion ..................................................................................... 7
4.0 WASTEWATER SERVICING ............................................................................... 7
4.1 Existing Wastewater Services .............................................................................. 7
4.2 Wastewater Design .............................................................................................. 7
4.3 Wastewater Servicing Conclusions ...................................................................... 9
5.0 STORMWATER MANAGEMENT ........................................................................ 9
5.1 Existing Stormwater Services ............................................................................... 9
5.2 Post-development Stormwater Management Target .......................................... 10
5.3 Proposed Stormwater Management System ...................................................... 10
5.4 Stormwater Servicing Conclusions ..................................................................... 11
6.0 UTILITIES........................................................................................................... 11
7.0 CONCLUSION AND RECOMMENDATIONS .................................................... 12

DAVID SCHAEFFER ENGINEERING LTD. PAGE I
© DSEL
ASSESSMENT OF ADEQUACY OF PUBLIC SERVICES
WINDMILL DEVELOPMENT GROUP LTD. MAY 2017 – REV 1
1040 BANK STREET

FIGURES
Figure 1 Site Location
TABLES
Table 1 Water Supply Design Criteria
Table 2 Water Demand and Boundary Conditions Proposed
Conditions
Table 3 Wastewater Design Criteria
Table 4 Summary of Estimated Peak Wastewater Flow
Table 5 Summary of Existing Peak Storm Flow Rates
Table 6 Stormwater Flow Rate Summary

APPENDICES
Appendix A Pre-consultation Notes
Appendix B Water Supply
Appendix C Wastewater Collection
Appendix D Stormwater Management
Drawings / Figures Proposed Site Plan

PAGE II DAVID SCHAEFFER ENGINEERING LTD.
© DSEL
ASSESSMENT OF ADEQUACY OF PUBLIC SERVICES
FOR
WINDMILL DEVELOPMENT GROUP LTD.
1040 BANK STREET
MAY 2017 – REV 1

CITY OF OTTAWA

1.0 INTRODUCTION
David Schaeffer Engineering Limited (DSEL) has been retained to prepare an
Assessment of Adequacy of Public Services report in support of the application for a
Zoning By-law Amendment (ZBLA) of a contemplated residential development adjacent
to the existing Southminster United Church. The subject property is bound by Bank Street,
Aylmer Avenue and Galt Street, as illustrated in Figure 1.
The property is located within the City of Ottawa urban boundary, in the Capital ward.
Comprised of a single parcel of land, the subject property measures approximately
0.32ha and is zoned as Minor Institutional (I1A).

Figure 1: Site Location
DAVID SCHAEFFER ENGINEERING LTD. PAGE 1
© DSEL
ASSESSMENT OF ADEQUACY OF PUBLIC SERVICES
WINDMILL DEVELOPMENT GROUP LTD. MAY 2017 – REV 1
1040 BANK STREET

The proposed ZBLA would allow for the development of a 6-storey mid-rise residential
building and four townhomes to the west of the existing Southminster church. The
contemplated development would also include one storey of underground parking, with
access from Galt Street. The residential component is comprised of approximately 18
units.
The proposed limits of work would only encompass the western edge of the property,
where the existing 2-storey events hall is located. The existing Hall would be demolished
to allow for the residential development. No changes are proposed for the eastern portion
of the property or the existing church.
It is contemplated to severe the property at the limits of works such that the contemplated
residential re-development and existing church are separate properties. A copy of the
conceptual site plan is included in Drawings/Figures.
The objective of this report is to provide sufficient detail to demonstrate that the
contemplated residential development is supported by existing municipal services.
1.1 Existing Conditions
The site consists of the existing Southminster church and attached 2-storey Hall with
associated parking, and landscape areas. Overhead hydro and telecommunication wires
exist along the south side of Aylmer Avenue and the east side of Galt Street.
Sewer and watermain mapping collected from the City of Ottawa indicate that the
following services exist across the property frontages within the adjacent municipal right-
of-ways:
Bank Street
 A 300mm diameter watermain
 A 300mm storm sewer
 A 300mm sanitary sewer

Aylmer Avenue
 A 200mm diameter watermain
 A 300mm storm sewer
 A 300mm sanitary sewer

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© DSEL
ASSESSMENT OF ADEQUACY OF PUBLIC SERVICES
WINDMILL DEVLEPMENT GROUP LTD. MAY 2017 – REV 1
1040 BANK STREET

Galt Street
 A 150mm diameter watermain
 A 300mm storm sewer
 A 300mm sanitary sewer
1.2 Required Permits / Approvals
The contemplated development is subject to the site plan control approval process. The
City of Ottawa must approve the engineering design drawings and reports prior to the
issuance of site plan control.
The subject property contains existing trees. Development, which may require removal of
existing trees, may be subject to the City of Ottawa Urban Tree Conservation By-law No.
2009-200.
The contemplated development is a single parcel of land that is not industrial and would
outlet to a storm sewer. The subject site may be severed along the limits of the residential
development, it is anticipated that stormwater management will only service the
residential development. Runoff from the existing church property would not be serviced
by the proposed stormwater management system. As a result, the stormwater
management system is exempt from sections 53(1) and (3) of the Ontario Water
Resources Act under Ontario Regulation 525/98.
1.3 Pre-consultation
Pre-consultation correspondence, along with the servicing guidelines checklist are
located in Appendix A.

DAVID SCHAEFFER ENGINEERING LTD. PAGE 3
© DSEL
ASSESSMENT OF ADEQUACY OF PUBLIC SERVICES
WINDMILL DEVELOPMENT GROUP LTD. MAY 2017 – REV 1
1040 BANK STREET

2.0 GUIDELINES, PREVIOUS STUDIES, AND REPORTS
2.1 Existing Studies, Guidelines, and Reports
The following studies were utilized in the preparation of this report.
 Ottawa Sewer Design Guidelines,
City of Ottawa, SDG002, October 2012
(City Standards)
 Ottawa Design Guidelines – Water Distribution
City of Ottawa, July 2010.
(Water Supply Guidelines)

o Technical Bulletin ISD-2010-2
City of Ottawa, December 15, 2010.
(ISD-2010-2)
o Technical Bulletin ISDTB-2014-02
City of Ottawa, May 27, 2014.
(ISDTB-2014-02)
 Design Guidelines for Sewage Works,
Ministry of the Environment, 2008.
(MOE Design Guidelines)
 Stormwater Planning and Design Manual,
Ministry of the Environment, March 2003.
(SWMP Design Manual)
 Ontario Building Code Compendium
Ministry of Municipal Affairs and Housing Building Development Branch,
January 1, 2010 Update
(OBC)
 Water Supply for Public Fire Protection
Fire Underwriters Survey, 1999.
(FUS)

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© DSEL
ASSESSMENT OF ADEQUACY OF PUBLIC SERVICES
WINDMILL DEVLEPMENT GROUP LTD. MAY 2017 – REV 1
1040 BANK STREET

3.0 WATER SUPPLY SERVICING
3.1 Existing Water Supply Services
The subject property lies within the City of Ottawa 1W pressure zone as shown by the
Pressure Zone map in Appendix B.
It is anticipated that the church is currently serviced by the existing 200mm watermain
within the Aylmer Avenue right-of-way. There is also a local 300mm diameter watermain
within the Bank Street right-of-way and an existing 150mm watermain within the Galt
Street right-of-way. Existing services in the surrounding areas are shown by the City
Water Distribution Mapping in Appendix B.
3.2 Water Supply Servicing Design
It is anticipated that the contemplated development will be serviced via a connection to
the existing 150mm diameter watermain within Galt Street.
Table 1 summarizes the Water Supply Guidelines employed in the preparation of the
preliminary water demand estimate.
Table 1
Water Supply Design Criteria
Design Parameter Value
Residential Townhouse 2.7 P/unit
Residential Average Apartment 1.8 P/unit
Residential Average Daily Demand 350 L/d/P
Residential Maximum Daily Demand 4.9 x Average Daily *
Residential Maximum Hourly 7.4 x Average Daily *
Church with Kitchen Facility 30.0 L/seat/d
Minimum Watermain Size 150mm diameter
Minimum Depth of Cover 2.4m from top of watermain to finished grade
During normal operating conditions desired 350kPa and 480kPa
operating pressure is within
During normal operating conditions pressure must 275kPa
not drop below
During normal operating conditions pressure must 552kPa
not exceed
During fire flow operating pressure must not drop 140kPa
below
*Daily average based on Appendix 4-A from Water Supply Guidelines
** Residential Max. Daily and Max. Hourly peaking factors per MOE Guidelines for Drinking-Water Systems Table 3-3 for 0 to 500 persons.
-Table updated to reflect ISD-2010-2
Table 2 summarizes the anticipated water supply demand and boundary conditions for
the contemplated development based on the Water Supply Guidelines.
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ASSESSMENT OF ADEQUACY OF PUBLIC SERVICES
WINDMILL DEVELOPMENT GROUP LTD. MAY 2017 – REV 1
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Table 2
Water Demand and Boundary Conditions
Proposed Conditions
Anticipated Boundary Condition2
Anticipated
Demand1 (m H O / kPa)
Demand1 2
Design Parameter from Re-
from Southminster
development
Church (L/min)
(L/min)
Average Daily Demand 11.5 9.0 43.7 428.7
Max Day + Fire Flow 17.2 44.1 + 10,000 11,100 L/min @ 140 kPa
(Townhomes)
Max Day + Fire Flow 17.2 44.1 + 9,000
(Mid-Rise Residence)
Peak Hour 30.9 66.5 31.6 310.0
1) Water demand calculation per Water Supply Guidelines. See Appendix B for detailed calculations.
2) Boundary conditions supplied by the City of Ottawa for the demands indicated in the correspondence; assumed ground
elevation 73.3m. See Appendix B.
Fire flow requirements are to be determined in accordance with Local Guidelines (FUS),
City of Ottawa Water Supply Guidelines, and the Ontario Building Code.
Required fire flow has been established, using the FUS, for the contemplated 6-storey
residential building and the 3-storey townhomes. A fire flow of 10,000 L/min for the
townhomes and 9,000 L/min for the 6-storey mid-rise residence was estimated using the
assumptions provided by the Architect, see Appendix A for correspondence. These
assumptions are summarized below:
 Type of construction – Wood frame for the townhomes and non-combustible
construction for the mid-rise residence
 Occupancy type – Limited combustible for the townhomes and the mid-rise
residence
 Sprinkler Protection – Non-sprinklered system for the townhomes and sprinklered
system for the mid-rise residence
The City of Ottawa was contacted to obtain boundary conditions associated with the
estimated water demand as indicated in the boundary request correspondence included
in Appendix A.
The City provided both the anticipated minimum and maximum water pressures, as well
as the estimated water pressure during fire flow as indicated by the correspondence in
Appendix A. The minimum and maximum pressures fall within the required range
identified in Table 1. Based on boundary conditions provided by the City, 11,100 L/min
at 140 kPa is available for fire flow.
It is anticipated the church will continue to be serviced by the existing connection to
Aylmer Avenue.
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