Columbia River Projects Water Use Plan Feasibility Study for Boat Launch Ramps at Nakusp on the Arrow Lakes Reservoir 777 W. Broadway Suite 301 Vancouver, BC, V5Z 4J7 In association with July 11, 2017 Feasibility Study for Boat Launch Ramps at Nakusp on the Arrow Lakes Reservoir TABLE OF CONTENTS 1.0 INTRODUCTION ........................................................................................................................................................ 1 1.1 PROJECT BACKGROUND ....................................................................................................................... 1 1.2 SCOPE OF WORK ................................................................................................................................. 1 1.3 REPORT ORGANIZATION ....................................................................................................................... 1 2.0 DATA COLLECTION ................................................................................................................................................. 3 3.0 INSPECTION FINDINGS OF THE POTENTIAL BOAT LAUNCH RAMP SITES AND EXISTING BOAT LAUNCH FACILITIES ................................................................................................................................................................ 4 3.1 SITE LOCATIONS .................................................................................................................................. 4 3.2 SITE OPPORTUNITIES AND CONSTRAINTS .............................................................................................. 4 3.3 NORTH NAKUSP SITE ........................................................................................................................... 4 3.4 NAKUSP PUBLIC BEACH SITE ................................................................................................................ 6 3.5 THE EXISTING NAKUSP BOAT LAUNCH RAMP SITE ................................................................................. 7 3.6 THE SOUTH NAKUSP SITE .................................................................................................................... 9 4.0 FEASIBILITY DESIGN OF BOAT LAUNCH RAMP AT THE STUDY LOCATIONS ............................................... 11 4.1 DESIGN BASIS .................................................................................................................................... 11 4.2 CONCEPTUAL DESIGN OF BOAT LAUNCH RAMPS ................................................................................. 12 4.3 NORTH NAKUSP SITE ......................................................................................................................... 13 4.4 PUBLIC BEACH SITE ........................................................................................................................... 13 4.5 EXISTING NAKUSP BOAT LAUNCH RAMP .............................................................................................. 13 4.5.1 Option 1 – Existing timber trestle with turnaround area. ........................................................................... 14 4.5.2 Option 2 – Steel Pile Supported Deck. ........................................................................................................ 14 4.5.3 Options 3 & 4 – Rockfill ramp with all weather surface or concrete slab surface ..................................... 15 4.6 SOUTH NAKUSP SITE ......................................................................................................................... 17 5.0 ENVIRONMENTAL ASSESSMENT OVERVIEW .................................................................................................... 16 5.1 GENERAL ........................................................................................................................................... 16 5.2 THE NORTH NAKUSP SITE .................................................................................................................. 16 5.3 THE PUBLIC BEACH SITE .................................................................................................................... 16 5.4 THE EXISTING NAKUSP BOAT LAUNCH RAMP SITE ............................................................................... 16 5.5 THE SOUTH NAKUSP SITE .................................................................................................................. 16 6.0 ARCHAEOLOGICAL ASSESSMENT OVERVIEW ................................................................................................. 17 6.1 GENERAL ........................................................................................................................................... 17 6.2 THE NORTH NAKUSP SITE .................................................................................................................. 17 6.3 THE PUBLIC BEACH SITE .................................................................................................................... 17 6.4 THE EXISTING NAKUSP BOAT LAUNCH RAMP ....................................................................................... 18 6.5 THE SOUTH NAKUSP SITE .................................................................................................................. 18 6.6 RECOMMENDATIONS .......................................................................................................................... 19 7.0 COST BENEFIT ANALYSIS .................................................................................................................................... 20 7.1 THE NORTH NAKUSP SITE .................................................................................................................. 20 7.2 NAKUSP PUBLIC BEACH SITE .............................................................................................................. 21 7.3 EXISTING NAKUSP BOAT LAUNCH RAMP – OPTION 1 ............................................................................ 22 7.4 EXISTING NAKUSP BOAT LAUNCH RAMP – OPTION 2 ............................................................................ 23 7.5 EXISTING NAKUSP BOAT LAUNCH RAMP – OPTION 3 ............................................................................ 24 7.6 EXISTING NAKUSP BOAT LAUNCH RAMP – OPTION 4 ............................................................................ 24 7.7 SOUTH NAKUSP BOAT LAUNCH RAMP ................................................................................................. 25 8.0 CONCLUSIONS AND RECOMMENDATIONS ........................................................................................................ 28 Final Report Page i of ii Feasibility Study for Boat Launch Ramps at Nakusp on the Arrow Lakes Reservoir 8.1 NORTH NAKUSP SITE ......................................................................................................................... 28 8.2 PUBLIC BEACH SITE ........................................................................................................................... 28 8.3 EXISTING NAKUSP BOAT LAUNCH RAMP SITE ...................................................................................... 28 8.4 SOUTH NAKUSP SITE ......................................................................................................................... 28 9.0 CLOSURE ................................................................................................................................................................ 29 LIST OF FIGURES Figure 3.1 – Aerial View of Potential Boat Launch Ramp Site at North Nakusp ................................................................... 5 Figure 3.2 – Aerial View of Potential Boat Launch Ramp Site near the Public Beach area .................................................. 7 Figure 3.3 – Aerial View of existing Nakusp Boat Launch Ramp .......................................................................................... 9 Figure 3.4 – Aerial View of Potential South Nakusp Boat Launch Ramp Site ..................................................................... 10 Figure 4.1 – Existing Timber Trestle Boat Launch Ramp .................................................................................................... 16 Figure 4.2 – Photo-simulation of Option 4 – Rock-filled Boat Launch Ramp ...................................................................... 17 LIST OF TABLES Table 7.1: North Nakusp Site – Estimated Construction Cost ............................................................................................. 21 Table 7.2: North Nakusp – Estimated Annual Maintenance Cost ....................................................................................... 21 Table 7.3: Nakusp Public Beach Site - Estimated Construction Cost ................................................................................. 21 Table 7.5: Public Beach Site – Estimated Annual Maintenance Cost ................................................................................. 22 Table 7.6: Existing Nakusp Boat Launch Ramp – Option 1 ................................................................................................ 23 Table 7.7: Existing Nakusp Boat Launch Ramp – Option 1 - Annual Maintenance ............................................................ 23 Table 7.8: Existing Nakusp Boat Launch Ramp – Option 2 ................................................................................................ 23 Table 7.9: Existing Boat Launch Ramp – Option 2 – Estimated Annual