Cultus Lake Park Sanitary Sewer Infrastructure Assessment

Fraser Valley Regional DistrictCultus Lake Sanitary Sewer Infrastructure Assessment – Final Report2.0 Existing System and ConditionsCultus Lake is served by a sewage collection and treatment system. Septic tanks anddisposal fields are used for treatment. The system was constructed in 1979 and it isoperated by the Cultus Lake Park Board (CLPB). The existing system is mainlycomprised of the following:• The east system serves the residents located on the east side of the Park. Thegenerated sewage discharges by gravity to a lift station (SL1) which pumps thecollected sewage to four septic tanks. The effluent from the septic tanksoverflows to lift station (SL3) which pumps the collected effluent to eight disposalfields (Field 1?8). The authorized capacity of the east disposal system is 360m3/day.• The west system serves the residents located on the west side of the Park. Onelift station (SL2) is used to collect the sewage and pump it back to the north sideof the collection system to overcome the variation of the ground levels betweenthe south and north side. The sewage discharges by gravity directly to two septictanks. The effluent from the septic tanks overflows to lift station (SL4) whichpumps the collected sewage to four disposal fields (Field 1?4). The authorizedcapacity of the west disposal system is 90 m3/day.Figure 1 outlines the location of the system components within the community. Inaddition to the east and west systems, individual septic tanks and disposal fields areused to serve different areas such as; Mountainview, Park Drive, and Parkview mobilehomes. These areas are not currently connected to the Cultus Lake sanitary sewagecollection system.2.1 PopulationThe Park includes seasonal and full?time residents. The estimated full?time residentpopulation (2003) was around 930 persons (Cultus Lake Park, Financial Sustainabilityand Governance Alternatives, Urban Systems 2003) based on 457 single family homeswhich represents 2.03 persons/household.Currently, the number of lots in the east side, west side, Mountain View/Park Drive, andplanned Cultus Lakeside condominium are 300, 80, 86 and 21 respectively. Based on the(2003) persons per household, and the total number of lots (487), the estimated full timeresident population is likely around 990 persons. The estimated population of the eastand west residents is shown on Table 1.Table 1: East and West residents PopulationDescription East Residents West ResidentsNumber of lots 300 80Residents/lot 2.03 2.03Population 609 163Project No. 30825 – September, 2012 Page 3