Tewin urban expansion development – likely between Ramsayville Rd and Farmer’s way, with a 600 ha Natural Land Trust area with many trails.

It seems that a large area west of Hwy 417 will stay “natural” according to documentation and a map on the Algonquin’s presentation that was done on January 26 to the City’s joint committee on planning and rural affairs.

In the map above the area that is close to Hwy 417 on Piperville Rd and up to Thunder Rd will be part of a “Natural Land Trust” area of Tewin. Tewin
will establish a Natural Land Trust comprised of approximately 600 hectares of natural heritage features that will integrate with the Greenbelt and provide an extensive trail system for the enjoyment of
everyone. The urban community will likely be situated between Ramsayville Rd and Farmer’s Way and from Leitrim Rd to Thunder Road and possibly up to Mitch Owens Road according to the documentation the CSCA has received. There is still a lot of unknowns but the more we study the documents and the maps our analysis points to those areas above. The core of the community will either be situated near Rene’s Corner or Anderson Links or somewhere near Anderson Road and Piperville and Farmer’s Way.

Tewin vision

With Tewin, it will be possible to create a true 15-minute community that delivers best practices in contemporary, sustainable, transit-oriented design “from the ground up”. This form of development is
just not possible through small additions to the edges of existing suburban communities that were not designed to support transit.
The vision for Tewin requires approximately 500 hectares of developable area (net of natural heritage lands) to accommodate the 35,000-45,000 residents and thousands of jobs that we believe are needed
support the full range of services and amenities a complete community requires. It will be purposefully designed and built with an integrated mix of land uses at transit-supportive densities from Day 1. Tewin
will establish a Natural Land Trust comprised of approximately 600 hectares of natural heritage features that will integrate with the Greenbelt and provide an extensive trail system for the enjoyment of
everyone. The Tewin lands do not contain any designated Agricultural lands, and are perfectly positioned as a missing part of the city structure, between the existing Greenbelt and proposed “Gold
Belt”. Day 1 transit will include express bus service north to the Confederation Line (Cyrville Station) and west
to the Trillium Line (Leitrim Station). Future transit will include the introduction of bus priority lanes along Hwy 417 and a potential extension of the LRT from the Trillium Line to Tewin.
Jobs will be embedded within Tewin, with next generation digital infrastructure and 5G technology in place to support telecommuting and the new economy. Tewin will have convenient access via transit to
three major employment areas (including the Airport) and significant frontage on the Highway 417 corridor. As noted by Staff in their Reports, its location fronting Highway 417 between Ottawa and Montreal, will create a new eastern gateway to the City

Wastewater Servicing –

The proposed trunk sewer connection to the South
Ottawa tunnel takes advantage of one of the most
underutilized pieces of existing wastewater infrastructure
in Ottawa. The existing tunnel is a deep system that has
reserved capacity for long-term buildout of development
in the Tewin area. The proposed trunk sewer connection
to the South Ottawa tunnel fulfills the original design
intent of the tunnel from the 1970s.

The developers would assume construction costs related
to the trunk sanitary sewer. Construction of trunk sewers
in sensitive clays is not unique to this site, as similar soils
are found around Orleans and around Barrhaven/Nepean.
Trunk sanitary sewer connections of this scale are often
extensive and deep, but in this case their construction
would provide an unparalleled opportunity to build a
distinct new area for long-term growth.

Water supply –

The developers would assume construction costs related
to the trunk watermain system. Trunk watermain systems
of this scale are often extensive, but in this case their
construction would provide an unparalleled opportunity
to build a distinct new area for long-term growth.

The expanded and upgraded water infrastructure will also
eliminate the existing trickle feed water system, which is
expected to save the City millions in long-term
maintenance costs.

Soil Quality

There are soil deposits with a variable degree of
sensitivity across the Tewin lands.
These lands are capable of being engineered from a
geotechnical perspective similar to what has been
previously undertaken in many other communities in the
Ottawa area with similar subsoil conditions. Examples of
these communities are Half Moon Bay in Nepean, Avalon
in Orleans and Eastboro in Navan.
Managing site grading in response to grade raise
restrictions is the primary objective. Only localized areas
where the hydraulic grade elevation requires exceeding
grade raise restrictions, would consideration can be given
to using lightweight fill and sump pumps to manage this
geotechnical issue.
From a geotechnical perspective, density and building
heights for this area can be addressed with a combination
of foundation solutions and grade management based on
permissible long-term settlements.

Stormwater Drainage –

Tewin will be developed with sensitivity towards the
characteristics of existing watercourses. Specifically,
erosion protection practices and other industry-leading
best management practices will form part of the
stormwater management strategy, and Low Impact
Development measures (LIDs) will be investigated as a
means to mitigate against unacceptable changes in flow
regime in the downstream watercourses. Based on the
commitment to manage the stormwater runoff from
Tewin effectively, there should not be any concerns
related to sufficiency of outlet.
The stormwater management strategy offers an
opportunity to maintain sensitive small local
watercourses by extending direct outlet(s) to the main
channel of Bear Brook. Consistent with City requirements
across all development areas, slope stability reviews are
expected to form part of the development plan and
stormwater management strategy, to ensure the longterm stability of any affected slopes. Tewin gives an
opportunity to further study the characteristics of the
Bear Brook watershed and provide additional means to
fund projects that would help improve overall watershed
drainage conditions.
Construction of stormwater management ponds in
sensitive clay soils is not unique to this site, as this is
encountered in many existing and developing
communities in Ottawa, including around Orleans and
around Barrhaven/Nepean. The soil conditions have been
and found appropriate for the planned development. The
developers would assume construction costs related to
development of stormwater management facilities, and
there would be no anticipated premiums to future
operation and maintenance costs as compared to similar
existing facilities across the City.


While the Transportation section of Document 3 speaks
to the various ranking criteria, it fails to properly consider
Tewin’s transit/transportation and financial
commitments, as outlined in the Tewin Brochure and its
Appendix A of the Tewin brochure outlines the Tewin
Transit Strategy, which commits to excellent transit
service, day one. The approach to delivering transit for
Tewin is to fund and make transit a viable option from day one, supporting a culture of transit ridership at no added cost to the taxpayer. New transit will be designed to extend, integrate with, and support the broader transit
network, to connect Tewin to destinations throughout
the city, and to deliver benefits for existing communities
along the way.
The Tewin transit strategy has the potential to create an
integrated city-wide transit network linked to nearby
communities and destinations. Nearby communities such
as Leitrim Village/Findlay Creek can be serviced by future
rapid transit, and major employment nodes such as the
Airport, St. Laurent Blvd, etc. will benefit from the
completion of the eastern transit loop (which mirrors the
western loop serving Barrhaven and Riverside South).
Unlike Ottawa’s three other suburban communities
outside the Greenbelt, where the Transitway was
developed by the RMOC and funded with 75 cent dollars,
the Tewin proposal includes a proactive funding plan
which is based on the development of an Area-Specific
Development Charge. The funding strategy (as found in
Appendix E of the Tewin submission) outlines a
sustainable funding model for not only transit, but all
roadways connecting the community.
Tewin has the opportunity to develop through the
implementation of innovative technologies such as 5G.
Transit connectivity, along with significant person trip
reducing trends resulting from ‘working from home’, will
see significantly less reliance on regional roads and
reduced VKT.
However, it is noted that Document 3 acknowledges that
options exist for important roadway needs such as goods
movement. The Tewin Funding Strategy includes the costs
for roadways, so these needs will be funded by Tewin’s
specific development charge.
Lastly, the City’s draft Official Plan policy is appreciated as
many of the requirements listed have been initiated and
vetted by the proponents. We look forward to working
with city transportation and planning staff to develop
these concepts further. Additionally, internal to Tewin,
draft OP policies for 15-minute neighbourhoods
contained in Section 4.1 are achievable, such as 30 km/hr
streets and vision zero.

Timeline? When will this all start?

According to Janet Stavinga, Executive Director for the project the goal is to provide the first homes within five years, therefore by 2026.