The sub-totals by priority are: 5 Year Westside Master. * Based on a 5 year time period

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1 5. COST RECOVERY This section summarizes the estimated capital costs for the works presented in Section 4. It also includes a unit cost analysis to support the cost recovery process. Please refer to Section 3.9 for cost estimate assumptions. 5.1 Capital Cost Summary The total estimated capital costs for all of the stormwater management projects recommended in Section 4 is: The sub-totals by priority are: $ 5,187,500 Priority 1... $ 1,384,100 Priority 2... $ 2,361,600 Priority 3... $1,441,800 These values, along with the total for each project, are shown in Table Administrative Cost Summary In addition to capital costs, the RDCO must administer stormwater plan reviews and must keep the master drainage plan up-to-date. Therefore, the following administrative costs have been developed: 5 Year Westside Master $50,000 Drainage Plan Update... Stormwater Management Plan $75,000* Reviews... RDCO Administrative Allowance.. $15,000* * Based on a 5 year time period Westside Master Drainage Plan 168 July \mdp July 2000\report

2 5.3 Unit Cost Analysis In order to evaluate cost recovery options, it is essential to calculate a unit cost for comparison purposes. Note that in Table 5.1, the estimated costs have been allocated to three different columns: existing development (to correct existing deficiencies) future development (within 5-year planning horizon) ultimate (for servicing development anticipated to occur beyond the 5-year planning horizon) Cost Allocation Philosophy Each project has been proposed for specific reasons. In some cases, this is to correct an existing deficiency. In other cases, it is to accommodate runoff from future development. Usually, however, a project is proposed to address both existing deficiencies and future development impacts. Costs for projects necessary to correct existing deficiencies must be allocated to (i.e. recovered from) existing development. Costs for projects required to mitigate potential impacts from, or to service new development, must be allocated to future development. Note, however, that a planning horizon of 5 years has been used when calculating the portion of the estimated project costs to be recovered from future development. This means that most of the projected development is not anticipated to occur until after the 5 year period. A portion of the costs for projects that would also service this long-term development has been allocated as oversize costs. The costs for projects not required during the next 5 years have also been allocated as oversize. There are many ways of allocating identified costs to each group of development. For the purposes of the WMDP, project costs have been allocated proportionately based on the number of development units serviced by each proposed project. For example, if a project services both existing and future development, and 20% of the total units that would benefit are existing, then 20% of this project cost would be allocated to existing. With respect to oversize allocations, an arbitrary 10% of the project s capital cost was allocated. Westside Master Drainage Plan 169 July \mdp July 2000\report

3 This reflects the assumption that the long-range development would pay for only the oversize of the project required to service the extra development. The 10% is an arbitrary value used only for the preliminary purposes of the WMDP Development Units There are many different types of development: Residential Commercial Industrial Institutional However, within each of these land use categories lies the potential for a variety of development units: Single family homes Duplexes Townhouses Convenience stores Gas bars Shopping malls And many, many others. It would be a daunting task to estimate the number of each type of potential development unit that might be constructed within the study area. However, even if this were done, one should not simply allocate costs on a per unit basis because each type of development unit represents a different impact on the corresponding stormwater management facility. For example, a detached single family residence would produce less runoff than a single gas bar / convenience store. It is therefore necessary to create equivalent development units based on runoff potential. Since the proposed capital works are sized to accommodate potential runoff, and runoff is a function of how much of the catchment area surface is impermeable, an Equivalent Unit is defined as the impervious area required to generate a specific amount of runoff under given hydrological conditions. Westside Master Drainage Plan 170 July \mdp July 2000\report

4 Since most of the existing and future development within the MDP service area is single family residential, one equivalent unit is defined as the impervious area associated with a typical SF lot. All other types of development are therefore expressed in terms of the number of equivalent units worth of runoff that particular development would produce. For example, if a commercial development with the same lot area as a SF lot produced three times the runoff as the SF lot, that commercial development would be considered as having 3 equivalent units, or 3 EU. Without delving into deeper details, this document has adopted the equivalency factors developed by the City of Kelowna. These are summarized in Table 5.2. Table 5.2 Unit Equivalency Land Use Equivalency Low Density Residential 1.00 High Density Residential 2.00 Commercial 2.53 Industrial 2.29 Institutional 1.71 Table B5 in Appendix B summarizes the estimated number of existing and future equivalent units to the year These estimates were extracted from RDCO Population and Employment Projections. Note that the unit totals used in Table 5.1 reflect the future units anticipated only during the first 5 years Unit Costs From Table 5.1, the unit capital costs for each of the two development categories within the 5 year planning horizon are: Existing... $ 107 Future... $ 1,365 Westside Master Drainage Plan 171 July \mdp July 2000\report

5 The unit administrative cost is calculated to be $91. This results in a total unit costs for future units of $1,456. Note that the above unit costs reflect the assumption that nonresidential development would also be expected to pay the unit charge. 5.4 Cost Recovery Strategy Development Cost Charges Through discussions with the RDCO Staff, it is apparent that the RDCO would like to develop and implement a Development Cost Charge (DCC) bylaw to recover capital costs from the Development Community for offsite stormwater management works necessary to service future development. The unit costs presented in Section for the future units represent a fair and equitable cost that could be incorporated into a DCC bylaw Local Service Areas A DCC bylaw, however, cannot be used to recover costs from existing development for works necessary to correct existing deficiencies. A common approach is to create a Local Service Area and impose a parcel tax. Although the unit costs associated with the existing units presented in Section may not be fully representative of the tax that might be paid by each property owner in that Local Service Area, they do provide an indication of the impact to general revenues from taxation. A more detailed analysis would be required using specific projects and service areas to estimate the costs to affected property owners. Westside Master Drainage Plan 172 July \mdp July 2000\report

6 Table 5.1 Westside Stormwater Management - Capital Cost Summary 5 Year Projected Allocation Project Description Priority Horizon Costs Existing 5 Year Ultimate A1 Smith Creek Channel Erosion at Gellatly Road 1 $103,700 82,103 11,227 10,370 A2 Carrington Pond 3 $93,900 74,344 10,166 9,390 A3 Smith Creek - Old MacDonald s Farm 3 $163, ,132 17,658 16,310 A4 Smith Creek Downstream of Old Okanagan Highway 2 $206, ,100 A5 Smith Creek Between Broadview and Reece Roads 3 $12,400 12,400 A6 Smith Creek through Jensen Property 1 $62,100 49,167 6,723 6,210 A7 Smith Creek Detention Pond 2 $223, ,500 A8 Smith Creek Culverts at Rubicon and Rainbow Roads 3 $15,700 15,700 A9 Private Culvert at Lot 2 on Rainbow Road 1 $22,000 22,000 A10 Shannon Lake Road; Asquith Road to Reece Road 3 $39,800 39,800 A11 Westbank Creek along Old Okanagan Highway 3 $37,400 37,400 A12 Westbank Creek at Elliot Road 3 A13 Westbank Creek At Paynter Road 2 $3,600 3, B1 Shannon Lake Overflow 2 $3,100 2, B2 Golf Course Drainage Route 3 $38,700 34,830 3,870 B3 Proposed Road From Smith Creek 3 C1 Drainage Route Downstream of Boucherie Road 3 $20,600 20,600 C2 Central IR9 Detention Pond 3 $305, ,500 C3 Ravine Protection Between Elk and Boucherie Roads 3 $110,500 99,450 11,050 C4 Elk Road Culvert 3 $5,700 5,700 C5 Culvert 50 On Louie Road 3 $7,100 7,100 C6 Culverts 57 on Louie Road and 56 on Highway 97 3 $7,800 7,800 C7 Grizzly Road diversion 3 $147, ,020 17,780 C8 Marlow Spring 1 $100,800 88,674 12,126 D1 Boucherie Road Culvert At Carral Road 3 $6,700 6,700 E1 Major Drainage Route on East Boundary Road 2 $68,500 68,500 E2 East Boundary Road North of Daimler Road 3 $140, ,200 E3 Davidson Creek at Shannon Woods 2 F1 Keefe Creek Downstream of Horizon Drive 2 $929, ,820 92,980 F2 Covington Court EDR 2 $32,700 28,766 3,934 F3 Sunview Place / Faulkner Crescent EDR 1 $306, ,717 36,883 F4 Faulkner Creek at Westlake Road 2 $146, ,490 14,610 F5 Faulkner Creek Upstream Of Westlake Road 3 F6 West Ditch Along Westside Road At Bear Creek Road 1 $4,700 4,700 F7 Bank Erosion Near Bear Creek Road 2 $23,600 23,600 F8 Keloka Place 2 $20,000 20,000 F9 Concord Road To Keefe Creek 3 $10,500 10,500 G1 Sink at Hayman Drive/Crestview Road Intersection 3 $1,600 1,600 G2 Culvert on Campbell Road at Casa Grande Drive 3 $3,600 3,600 Westside Master Drainage Plan July, \Table_5-1.xls Page 1 of 2

7 Table 5.1 Westside Stormwater Management - Capital Cost Summary 5 Year Projected Allocation Project Description Priority Horizon Costs Existing 5 Year Ultimate H1 Westside Road Culvert 3 $6,500 6,500 H2 Westside Road Culvert (See H1) 3 H3 Culvert South of Raymer Park 1 $6,000 6,000 I1 Westside Road 3 $30,200 30,200 I2 Westside Road At Raymer Park 3 $33,500 33,500 J1 Culvert at Pebble Beach 3 $6,000 6,000 K1 Anders, Teal and Stevenson Roads 2 $44,800 44,800 K2 Emergency Drainage Route Ogden to Montigny 3 $82,900 82,900 K3 Boucherie Road at Montigny Road 3 $3,300 3,300 K4 EDR Lakeview Cove to Boucherie Road 1 $238, ,721 28,679 K5 EDR Gregory Road to Boucherie Road 1 $67,000 53,046 7,254 6,700 K6 EDR Boucherie Road to Lake; West of Green Bay 2 $42,600 42,600 K7 EDR Boucherie Road to Lake; East of Old Boucherie 2 $3,500 3,500 L1 Salloum Road 2 $26,800 24,120 2,680 L2 Glenrosa Road Storm Trunk 1 $437, ,750 43,750 L3 Re-Grade Glenrosa Road 2 $387, ,110 38,790 L4 Re-Direct Major Route at Turnbull Road 2 $1,600 1,600 L5 Webber Road School Site 3 $110, ,800 L6 ScotsTown and Webber Road 2 $110, ,800 L7 Gorman/McTaggart To Scotstown/Webber 3 L8 McIver Road 1 $23,200 20,409 2,791 L9 Corral Court 1 $12,100 12,100 L10 Glen Abbey Detention Pond 2 $86,600 86,600 Total Capital Costs $5,187,500 $1,203,499 $2,099,321 $1,884,680 Estimated Equivalent Units (5 Year Planning Horizon) 11,247 1,538 Capital Unit Costs $107 $1,365 Administrative Cost Allowances (5 Years) Stormwater Management Plan Reviews 75,000 5 Year Master Drainage Plan Update 50,000 RDCO Plan Administration Allowance 15,000 Priority Totals: Total Administrative Costs $140,000 Priority 1 - $1,384,100 Administrative Unit Cost $91 Priority 2 - $2,361,600 Priority 3 - $1,441,800 Total Unit Cost $1,456 Westside Master Drainage Plan July, \Table_5-1.xls Page 2 of 2

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