Three Sisters Mountain Village Properties Ltd
Total Page:16
File Type:pdf, Size:1020Kb
STORMWATER MANAGEMENT STRATEGIES REPORT FOR THREE SISTERS MOUNTAIN VILLAGE PROPERTIES LTD. SEPTEMBER 2016 STANDARD LIMITATIONS This report was prepared by MMM Group Limited (MMM) for the account of the Three Sisters Mountain Village Properties Ltd and their Authorized Agent Quantum Place Development Ltd. The disclosure of any information contained in this report is the sole responsibility of the client, Three Sisters Mountain Village Properties Ltd. The material in this report reflects MMM’s best judgment in light of the information available to it at the time of preparation. Any use which a third party makes of this report, or any reliance on or decisions to be made based on it, are the responsibility of such third parties. MMM accepts no responsibility for damages, if any, suffered by a third party as a result of decisions made or actions based on this report. Revisions Summary Document Author Reviewer Date Summary of Changes Revision 0.0 06 June 2016, Draft for Internal Review GI JM/ML 2016 1.0 20 June, 2016 Client Submission GI ML 2.0 08 September Client Submission GI ML Stormwater Management Strategies | Three Sisters Mountain Village Properties Ltd. 1 MMM Group Limited | September 2016 | 5215046-000 TABLE OF CONTENTS 1.0 INTRODUCTION ................................................................................ 4 1.1 General .............................................................................................................................. 4 1.2 Study Objectives .............................................................................................................. 4 1.3 Previous Studies .............................................................................................................. 4 2.0 HYDROLOGICAL ANALYSIS ........................................................... 7 2.1 Regional Frequency Analysis ......................................................................................... 7 2.1.1 Regional Mean Annual Runoff Analysis ................................................................... 7 2.1.2 Regional Frequency Analysis for Peak Discharges ................................................. 7 2.2 SWMHYMO Model........................................................................................................... 12 2.2.1 Model Setup ........................................................................................................... 13 2.3 Design Storm .................................................................................................................. 13 3.0 RESULTS OF ANALYSIS ................................................................ 16 3.1 Permissible Release Rate .............................................................................................. 16 3.2 Storage Requirements ................................................................................................... 16 4.0 CONCLUSIONS ............................................................................... 21 5.0 REFERENCES ................................................................................. 23 Stormwater Management Strategies | Three Sisters Mountain Village Properties Ltd. 2 MMM Group Limited | September 2016 | 5215046-000 LIST OF FIGURES PAGE NO. Figure 1.1 Site location 6 Figure 2.1 Hydrometric Stations 9 Figure 2.2 Preliminary Site Plan (Resort Centre) 14 Figure 2.3 Preliminary Site Plan (Smith Creek) 15 Figure 3.1 Creek Watershed Areas 18 Figure 3.2 Conceptual Stormwater Storage Facility Locations (Resort Centre) 19 Figure 3.3 Conceptual Stormwater Storage Facility Locations (Smith Creek) 20 LIST OF TABLES PAGE NO. Table 1 Selected stream gauges and associated effective areas 8 Table 2 Estimated Peak Discharges 10 Table 3 Regional Relationships 11 Table 4 Adjusted Regional Relationships 12 Table 5 Sub-catchment Characteristics 13 Table 6 Maximum Permissible Release Rate 16 Table 7 Storage Requirements (Resort Centre) 17 Table 8 Storage Requirements (Smith Creek) 17 APPENDICES Appendix A SWMHYMO input / output file Stormwater Management Strategies | Three Sisters Mountain Village Properties Ltd. 3 MMM Group Limited | September 2016 | 5215046-000 1.0 INTRODUCTION 1.1 General The Three Sisters Mountain Village (TSMV) development extends approximately 10 km along the southwest side of Highway 1, in the Town of Canmore, Alberta (Refer Figure 1.1). It encompasses Sections 7, 11, 12, 13, 14, 15, 21 and 22 of Township 24, Range 10, West 5 th Meridian. The prominent creeks that flow through the proposed development are Three Sisters Creek, Stewart Creek, Smith Creek, and Pigeon Creek, in addition to a few other seasonal unnamed drainage courses. The creeks originate from high mountainous terrain and generally flow from southwest to northeast, all eventually draining into the Bow River. The watershed areas are forested up to the treeline and consist of exposed rock surfaces above the treeline. The project area is part of the third reach of the Bow River basin which extends from Banff National Park to upstream of the Bearspaw Dam. Bow basin is the most populated river basin in Alberta and supplies water to more than a million people (the Bow River flow rate at Canmore is 698 m3/s for a 100 year event). In 2007, the Bow River Basin Council recognized the need to develop and achieve a sustainable watershed management plan focusing on main source control and monitoring water bodies within the basin. A hydrological study for the aforementioned creeks within the TSMV area is presented in this report. 1.2 Study Objectives Stormwater management and other supporting studies are conducted to comply with regulatory requirements. The purpose of this study is to present the stormwater management strategies for the proposed layout of the TSMV development which is comprised of the Resort Centre and Smith Creek and existing Stewart Creek developments. The main objectives are to provide a hydrological assessment to determine the maximum permissible release rates from the new development to the existing creeks and to estimate the on-site stormwater storage requirements. 1.3 Previous Studies UMA Engineering Ltd. 1991: Technical Report 9.5b Water Quality, Environmental Impact Assessment Report for the Three Sisters Golf Resorts Inc., September, 1991. UMA Engineering Ltd. (November 1994, Calgary Alberta): Grassi - Three Sisters Area Structure Plan, Technical Appendix C, Hydrology & Stormwater Management. Prepared for Three Sisters Resorts Inc. UMA Engineering Ltd. (May 1998, Calgary Alberta): Proposed Three Sisters Creek Subdivision, Storm Water Management Plan. Prepared for Three Sisters Resorts Inc. Stantec Consulting Ltd. (June 2001, Calgary Alberta): Three Sisters Site 2A Phase 1 Stormwater management. Prepared for Three Sisters Resorts Inc. Stormwater Management Strategies | Three Sisters Mountain Village Properties Ltd. 4 MMM Group Limited | September 2016 | 5215046-000 Stantec Consulting Ltd. (July 2001, Calgary Alberta): Three Sisters Site 2A Stormwater management. Prepared for Three Sisters Resorts Inc. Stantec Consulting Ltd. (September 2003, Calgary Alberta): Three Sisters Site 2A, Phase 2 - Stage 2. Prepared for Three Sisters Mountain Village Ltd. Stantec Consulting Ltd. (May 2004, Calgary Alberta): DC sites 1 to 6 Stormwater Master Drainage Plan. Prepared for Three Sisters Mountain Village Ltd. UMA Engineering Ltd. (May 2004, Edmonton Alberta): Three Sisters Creek - Regional Frequency Floods. Prepared for Three Sisters Mountain Village Ltd. Westhoff Engineering Resources, Inc., (February 2004, Calgary Alberta): Master Drainage Plan prepared for Three Sisters Mountain Village. Westhoff Engineering Resources, Inc., (May 2006, Calgary Alberta): Three Sisters Creek Golf Resort Management Strategies Prepared for Three Sisters Mountain Village. Westhoff Engineering Resources, Inc., (February 2013, Calgary Alberta): Master Drainage Plan for Three Sisters Mountain Village, Prepared for Three Sisters Mountain Village. Stormwater Management Strategies | Three Sisters Mountain Village Properties Ltd. 5 MMM Group Limited | September 2016 | 5215046-000 BILL GRIFFITHS CREEK BOW RIVER RED DEER THREE SISTERS PARKWAY CANMORE CALGARY HIGHWAY 1 UNNAMED CREEK 21 22 23 24 19 BOW RIVER LETHBRIDGE GAP LAKE THREE SISTERS BLVD HIGHWAY 1 CREEK BOW RIVER SISTERS THREE SISTERS PARKWAY THREE 16 15 HIGHWAY 1 13 18 BOW RIVER 3 HIGHWAY 1 20.12 GEORGE BIGGY SR RD STEWART CREEK 9 10 11 12 CAIRNES CREEK 7 PIGEON CREEK SMITH CREEK MARSH CREEK LEGEND THREE SISTERS MOUNTAIN VILLAGE PROPERTY THREE SISTERS MOUNTAIN VILLAGE RESORT CENTRE ASP Suite 203 - 729 10 Street STORMWATER MANAGEMENT STRATEGIES SMITH CREEK ASP Canmore, AB T1W 2A3 t: 403.678.3500 STEWART CREEK ASP f: 403.678.3501 SITE LOCATION www.mmm.ca SCALE: DATE: PROJECT No: DRAWING No: NTS 2016-08-29 5215046-000 FIGURE 1.1 2.0 HYDROLOGICAL ANALYSIS 2.1 Regional Frequency Analysis In many cases hydrological information is not available for a subject site (as in this case). In this event it is necessary to undertake a regional frequency analysis using hydrologically similar stations to allow estimation of discharge from the project site. The main parameters that inform the regional analysis are the peak flow, catchment area and runoff depth. The following sections provide a description of the hydrological analysis that has been undertaken. 2.1.1 Regional Mean Annual Runoff Analysis The median annual runoff represents the impact of various watershed and climatic variables which are typically used in regional analyses, such as annual