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HomeMy WebLinkAboutPD-061-01 ~... tiN: P061-01 " THE CORPORATION OF THE MUNICIPALITY OF CLARlNGTON REPORT Meeting: General Purpose and Administration Committee File # PO '3 Res. tt6f1l- 3i;s -0 ( Date: Monday, June IS, 2001 Report #: PD-061-01 FILE#: PLN 17.13.5 By-law # Subject: FOSTER CREEK SUBW ATERSHED STUDY FILE: PLN 17.13.S Recommendations: It is respectfully recommended that the General Purpose and Administration Committee recommend to Council the following: 1. THAT Report PD-061-01 be received; 2. THAT the Foster Creek Subwatershed Planning Study be received in principle; 3. THAT Staff be authorized to initiate an amendment to the Clarington Official Plan to implement the recommendations of the Foster Creek Subwatershed Planning Study related to the greenlands system; 4. THAT the Ministry of Natural Resources be requested to undertake a formal wetland evaluation ofthe Foster Creek headwater wetland; and 5. THAT a copy of Report PD-061-2001 and Council's resolution be forwarded to all delegations and the interested parties indicated at the end of this report. 1. BACKGROUND 1.1 Foster Creek Developments, Robert Stephenson and Kiradaar Investments have submitted two subdivision applications (IST-S9059 and S-C-2000-001), as well as a proposed Neighbourhood Design Plan, for the north eastern quadrant of the Foster Neighbourhood of Newcastle Village. The applications together propose to develop a total of 50 ha of land east of Rudell Road north of Highway 2 for a mixture of low and medium density residential, school, park and open space uses. Most of the subject lands lie within the subwatershed of Foster Creek, with the south western portion being drained by a small tributary of Wilmot Creek. (see Attachment 1) 615 . .' REPORT NO.: PD-061-01 PAGE 2 1.2 The Clarington Official Plan (Section 20.2.3) states that, prior to municipal approval of any draft plan of subdivision, the Municipality will prepare a subwatershed study in consultation with the Ministry of Natural Resources and the Conservation Authority, subject to satisfactory cost-sharing anrangements with the benefiting property owners. The Municipality retained the consulting fIrms Gartner Lee Limited and Greenlands International Consulting Inc. to undertake a subwatershed study of Foster Creek. This Subwatershed Planning Study is the first such study undertaken by the Municipality in accordance with the Official Plan's policy. 1.3 The Subwatershed Planning Study also addresses the small tributary of Wihnot Creek that drains a portion of the site. It was determined that a full subwatershed study of Wihnot Creek is not necessary at this time. The Ganaraska Region Conservation Authority is currently finalizing a Watershed Study for Wihnot Creek and there are no current development proposals within the balance of the Wihnot watershed in Newcastle Village. The consultants are also undertaking an Environmental Impact Study for that portion of Foster Creek adjacent to the proposed subdivisions. 2. FOSTER CREEK SUBW ATERSHED STUDY 2.1 Goals and Obiectives 2.1.1 There are two main goals which drive the preparation of any subwatershed study. The first and most apparent is that a subwatershed study provides an understanding of how a subwatershed functions and how a stream will respond to urban development within its drainage area. This helps the Municipality to evaluate development applications and to plan for future development in a manner that will minimize flood damage as well as protect the quality and quantity of both ground water, surface water, and the integrity of the receiving watercourse. 2.1.2 Second goal of a subwatershed study is to identifY and protect a viable green1ands systern on the landscape. The larger scale of a subwatershed study allows important landscape features within and adjacent to the subwatershed to be identified and the degree of 616 .' REPORT NO.: PD-061-01 PAGE 3 connectedness between them to be studied. Not only can the subwatershed study identify the existing landscape elements such as woodlots which should be protected as part of a greenlands system, it can also identify those areas where connectivity is weak and recommend measures to address these deficiencies. 2.1.3 Based on these goals, a number of resource management objectives for the Foster Creek Subwatershed Planning Study were established, as sunnnarized below: . Protect groundwater quality and maintain the pattern of groundwater discharge . Maintain or reduce the potential for stream channel erosion and flood damage . Protect or enhance the quality of stream water and aquatic habitat . Maintain or enhance existing natural vegetation . Protect key terrestrial communities, including headwater streams and wetland complexes. 2.2 Overview of the Subwatershed 2.2.1 Foster Creek arises in an extensive marsh and swamp wetland complex in Concession 3, and flows south through Newcastle Village. South of Highway 401 in the Samuel Wilmot Nature Area, the creek flows into Wilmot Creek which, in turn, discharges into the Wilmot River mouth Wetland on the Lake Ontario shoreline. The Foster Creek subwatershed covers 981 ha and is tucked between the Wilmot Creek watershed on the west and the Graham Creek watershed on the east. 2.2.2 The extensive forests that once covered the subwatershed have been largely cleared over the past two centuries for agricultural and settlement purposes. Today, forests are found mainly in the valley, bottomlands and headwater swamps and cover only 92 ha (9 percent) of the subwatershed. The average forest cover for Durham Region is 20 percent. The vegetation associated with the Foster Creek valley is generally too narrow and discontinuous to provide core wildlife habitat, but does provide an important wildlife 617 <' REPORT NO.: PD-061-01 PAGE 4 corridor connecting the core areas located at the Rivermouth wetland and the headwater swamps. 2.2.3 The subwatershed is underlain by Bowmanville Till. This till is very dense and acts to impede the infiltration of precipitation to groundwater. As a result, the discharge of groundwater to Foster Creek is very low. Most of the contribution to surface flow in the creek comes from overland flow during storm events, which makes the stream systern very "flashy" (rapid change in stream levels during storms). This condition is intensified by the agricultural drains in the northern portion of the subwatershed which quickly convey infiltrating precipitation to the creek. The study classified Foster Creek as a warm water stream with good water quality, but with limited potential to be converted to a cold water stream. 2.3 Recommended Subwatershed Plan 2.3.1 The recommended Subwatershed Plan represents a compromise between development and the preservation of natural heritage features. Specifically, the recommended plan identifies the following: . lands that should be protected as part of a greenlands system development criteria that should be used in the design of future urban development conservation and management practices that address existing impacts from land use activities . . . projects and programs to address specific problems in the subwatershed. 2.3.2 Recommended Greenlands System The Greenlands System recommended by the Subwatershed Plan focuses on protecting the Wilmot Rivermouth wetland and the headwaters wetland, and improving connectivity between these two areas and the adjacent Wilmot and Graham Creek watersheds. The key elements of the recommended Greenlands System (as indicated on Attachment 2) are as follows: 618 .' REPORT NO.: PD-061-01 PAGE S a) Natural Core Areas The Subwatershed Plan recommends that the Wilmot Creek Rivermouth wetland and the headwater wetlands be identified and protected as natural core areas. The headwater swamps, which also serve as the headwaters for a tributary of Graham Creek, are heavily forested and the Plan recommends that they be nominated for a formal wetland evaluation. The Rivermouth wetland lies completely within the Samuel Wilmot Nature Area. b) Corridors, Connections and Minor Core Area The Subwatershed Plan recommends that a corridor be identified and protected along the main branch of Foster Creek. This corridor, which would also incorporate all flood lands and other hazard lands associated with the creek, would be at least 100 metres wide wherever the watercourse is not constrained by existing residential development, and would connect the two core areas at the top and bottom of the subwatershed. Smaller corridors are identified along three of the Creek's tributaries. The existing woodlot east of Arthur Street north of the C.P. Rail line is also recognized as a minor core area. c) Ecological Restoration Areas and Linkages The Plan identifies a number of areas where linkages should be created or natural features restored in order to improve connectivity within the Foster Subwatershed and with adjacent watersheds. The Plan recommends that a corridor at least 100 metres wide be created south of the C.N. Rail line between the Wilmot Creek and the Graham Creek valleys. A similar corridor is recommended for the north side of the C.P. Rail line between the Foster Creek and Graham Creek valleys. The Plan further recommends that a portion of a buried tributary north of the C.P. Rail in the vicinity of Arthur Street be uncovered and a 100 metres wide corridor be established to connect to the minor core area. The establishment or restoration of native trees and ground cover in these corridors will facilitate wildlife movement. Smaller 619 REPORT NO.: PD-061-01 PAGE 6 ecological restoration areas also identified in the headwater wetlands and along a northern tributary to connect with Stalker Creek. 2.3.3 Development Criteria The Subwatershed Plan provides a master concept plan to regulate the municipal servicing and stormwater management requirements associated with new development. Based on the land use designations within the Clarington Official Plan, the post-development hydrology was calculated for the subwatershed, including catchment areas and locations for future storm water management ponds. The storm water management ponds are to address issues of water quality and quantity. This comprehensive evaluation of the system ensures that any measure implemented to deal with storm water from on site do not have a negative impact downstream. Functional servicing reports will be required demonstrating how specific proposed developments conform with the intent of the Subwatershed Plan prior to their approval. 2.3.4 Stewardship and Conservation Practices The Subwatershed Plan suggests a number of measures that could be used by private land owners to help improve water quality in the urban and rural sections of Foster Creek and its tributaries. For UIban homeowners, this could include a program to encourage the disconnection of downspouts and roof leaders from the municipal storm sewer system in favour of rain barrels and storm gardens. Rural landowners, in particular the agricultural community, could be encouraged to modify current farm practices that contribute to stream instability and aquatic habitat deterioration. However, the Subwatershed Study notes that public education and awareness programs are key to the success of any successful stewardship initiative. 2.3.5 Recommended Capital Works Proiects The following capital works projects are associated with or affected by the recommended Subwatershed Plan: 620 REPORT NO.: PD-061-01 PAGE 7 a) Construction of the Foster Creek Trunk Sanitary Sewer by the Region of Durham The Region has indicated that the Foster Creek valley is one of the corridors being considered for this trunk sanitary line. The Subwatershed Plan notes that, should the Class Environmental Process justify the use of the Foster Creek valley as the route for the trunk sewer, the findings and recommendations of the Subwatershed Study should be used to guide the rehabilitation of the valley. b) Construction ofbridge!culvert structures along Foster Creek The westward extension of Grady Street into the Foster Neighbourhood will require the construction of a bridge/culvert structure spanning the Foster Creek valley. Improvements to existing bridge/culvert structures on Foster Creek may also be required as the result of updated floodplain mapping for Foster Creek. All such projects will be subject to a Class Environmental Assessment process. c) Valley wall protection and stabilization initiatives The Subwatershed Study identifies a number of sites where such work should be considered. 3. IMPLEMENTATION OF RECOMMENDED SUBW ATERSHED PLAN 3.1 As noted above, the consultant has recommended a number of initiatives and actions that the Municipality and the Ganaraska Region Conservation Authority could undertake in order to implement the Foster Creek Subwatershed Plan. A more complete list is included in Attachment 3 to this Report. Actions that would require capital expenditures are most appropriately dealt with through the annual review of capital budgets, while stewardship opportunities could be pursued by municipal or Conservation Authority staff, possibly in cooperation with community groups. 3.2 The establishment of an appropriate policy framework to implement the recommended greenlands system is readily achievable through the Clarington Official Plan. Many features of the greenlands system are already recognized and protected in the Official Plan. 621 REPORT NO.: PD-061-01 PAGE 8 Evaluated wetlands such as the Wilmot Rivermouth wetland and significant valleylands such as the main branch of Foster Creek are recognized as core components of the Municipality's natural heritage system. As such, they are designated 'Environmental Protection Area' on Map A and identified on Map C. 3.3 The Official Plan does not recognize the headwaters wetland since it has not been evaluated by the Ministry of Natural Resources. As such, it is recommended that Council formally request the Ministry to undertake the evaluation. However, Map C identifies the wooded areas which cover much of the wetland as 'significant woodlands'. Any development proposal located within or adjacent to these woodlands would be required to prepare an Environmental Impact Study in accordance with Official Plan policy. 3.4 The ecological restoration areas recommended by the Subwatershed Plan to "fill in" the greenlands system are not currently recognized in the Official Plan. However, the inclusion of policies related to ecological restoration would be consistent with the first goal of Chapter 4 (to enhance natural heritage system and its ecological integrity). The actual form of such policies has not yet been determined, although the identification of ecological restoration areas on Map C and the strengthening of the environmental impact study requirements would be appropriate. Staff are requesting authorization to proceed with an amendment to the Official Plan to incorporate policies related to the greenlands system. It is anticipated that the public meeting for the proposed amendment would be held in Fall 2001. 4. CONCLUSIONS 4.1 The Foster Creek Subwatershed Planning Study establishes a framework within which current and future development proposals in the Foster Neighbourhood can be reviewed. Once the Planning Study is endorsed in principle by Council, Staff will proceed with the Neighbourhood Design Plan for Foster Neighbourhood and anticipate holding a Public Information Centre in the Fall. Municipal approval of Subdivision Applications 18T -89059 and S-C-2000-001 can proceed once the Neighbourhood Design Plan and the 622 " REPORT NO.: PD-061-01 PAGE 9 Environmental Impact Study for Foster Creek are finalized. Approval of these subdivisions however, is not contingent upon the approval of the Official Plan Amendment related to the greenlands system. Respectfully submitted, Reviewed by, ~ r()~ O~-~ Bin Newell, M.C.I.P., R.P.P. Acting Director of Planning & Development JAS*BN*df Franklin Wu, M.C.I.P., R.P.P. Chief Administrative Officer. 11 June 2001 Attachment 1 - Key Map Attachment 2 - Proposed Greenlands System Attachment 3 - Implementation Requirements & Responsibilities 623 ..' REPORT NO.: PD-061-01 PAGE 10 Interested parties to be notified of Council and Committee's decision: Mr. Rob Franklin Ganaraska Region Conservation Authority P.O. Box 328, PORT HOPE, Ontario LlA 3W4 Mr. Meredith McMillan 8 Remi Court NEWCASTLE, Ontario LIB 1J1 Mr. Bob Stephenson 170 Given Road NEWCASTLE, Ontario LIB IG9 Mr. Tim Rance Ministry of Natural Resources 50 Bloomington Road West R.R.#2 AURORA, Ontario L4G 3G8 Mr. Ed Vanhaverbeke Foster Creek Developments 20 Robert Street West, Unit A NEWCASTLE, Ontario LIB lC6 Mr. Tom Farell Ministry of Natural Resources 50 Bloomington Road West R.R.#2 AURORA, Ontario L4G 3G8 Kiradaar (Ontario) Inc. 1151677 Ontario Inc. 7 Director Court, Suite 104 WOODBRIDGE, Ontario L4L 4S5 Mr. John Presta Region of Durham Works Department Box 623 WHITBY, Ontario LlN 6A3 Mr. Chris Darling Region of Durham Planning Department Box 623 WHITBY, Ontario LlN 6A3 Ms. Mary Rycroft G.M. Semas & Associates Ltd. 110 Scotia Court, Unit 41 WHITBY, Ontario LlN 8Y7 624 ',' Foster Creek Watershed _ __ Limits of Foster Creek Sub Watershed Study Area ~ 18T-89059 ImII S-C.2000-001 625 ATTACHMENT NO.2 'ii I Foster Creek Watershed Greenlands System Limits of Foster Creek . - - Sub Watershed Study Area ~ Natural core Area ~ Ecological Restoration ~ Area and Linkages i eo - eo: Corridors, Connections :_____~and Minor Core Areas 626 " rJ:i ~ .... - .... - .... .c .... rJ:i = o ::;:l.., rJ:i ~ ~ "C = ~ rJ:i -= ~ e ~ l-< .... = C'" ~ ~ = o .... - ~ - = ~ e ~ - ::;:l.., e - . ~ ~ ~ - .c ~ E-- ~ ell=: ".<> =s Oc;j " " " 8. ... :l ~ I- .5 "" .2 '0 E 5 B " E - C 0. C 00" c...'O ~ o > ....... o:~~ " 5 ~ ~ ... " 5 1= ~ '0 <2 ~ g o ~ -E ~C:] j~~ z ~ '5 " ... ~ ::; '" ...'O~ u.& 0 :.a ~ ~ I ~ "'COQj ~~~] ~~lS:c: v =' t' ~ ~ S ~ ~ c: <Il "0 > t>(l I- C :a 'c;.: ~ 8.0 Q.E~~ . ;;:; ,., " " " " " " CD CD " -< '0 " " ,..;, ~ o cc -< _ 0 u2.0'0 ~ __ c o -~ .~ 5u :5 - ~ 8. 0. 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