3 PRV Project
Substantial completion of the 3-PRV project was achieved on March 31, 2021 in accordance with our grant funding deadline. However, we are still waiting for BC Hydro to complete the electrical hookups prior to paving the roads at all three sites. Our contractors art continuing to address deficiencies identified by our project engineers. Correction of these deficiencies is at the cost of the contractor and does not impact our overall budget for this project.
Landscaping: Landscaping work around the PRV stations will be managed by Public Works staff and not the contractor. The intent is to add some native ground cover and shrubs to green the disturbed areas around the PRV stations. Vegetation planted will be low growing so as not to interfere with internal access to the stations. In order to replace the internal heavy cast iron components within the PRV, a crane truck’s boom must be able to access the inside of the station, and the crane operator must have full visibility while this is occurring. Hence the need to ensure vegetation surrounding the station is kept low.
Screening: We have had some enquiries about installing a fence around the PRV station at Upper Bayview in order to hide it from view; however, the need for access is paramount and a fenced in compound would limit this ability. Our preferred option is to wrap the kiosks in vinyl with a public competitive tender issued in due course to invite companies to bid on the production and installation of vinyl wraps for the kiosks based on resident feedback on themes and designs. There are two common themes often taken when wrapping a kiosk:
- Artistic – artistic wraps come in a variety of styles and include stylistic paintings, floral patterns, historical photos, and more. See this article in the Delta Optimist for samples of artistic designs.
- Camouflage – the intent of this theme is to use vegetation or trees to make the kiosk appear as part of the natural landscape to help it blend in with the background. Here is an example from a kiosk in Burnaby and a few others plucked from around the web.
Let us know which of these themes you would like to see at each of the three sites by emailing firstname.lastname@example.org. Once a theme has been selected, we will reach out again with design options before proceeding to tender.
Further Construction Work Required
Now that we have reached substantial completion of the 3-PRV project, we need to initiate a separate capital project to disconnect the Phase IV and Phase V tanks from the potable water system as required by Vancouver Coastal Health. This involves underground pipe work at both tanks along the Upper Bayview access road and will ultimately require a water interruption during the tie-in process. This project is in the initial planning stages and it will likely be several weeks before we have a schedule for when the works will take place. Once we know more a Village Update piece will be published.
Pressure reducing valve (PRV) stations are required to keep the water distribution system pressures at a safe operating level. When the pressure in the distribution system goes too high, pipes begin to leak and can even burst. When the pressure is too low, fire protection is compromised. The Municipality has 17 PRV stations situated throughout the community – most are underground, but the three new stations are above ground.
Underground PRV stations are considered to be confined spaces by WorkSafeBC and pose extreme risks to employees as they work within them. A typical underground PRV requires 3 persons to work on: one doing the work, one manning an emergency winch, one monitoring traffic and on standby to call emergency services for a rescue if necessary. Because of the safety risk and because an above ground station can be inspected and maintained by one individual, most municipalities are moving towards above ground stations. Public Works engaged engineers and conversed with WorkSafeBC to determine if our underground chambers could be made into non-confined spaces by adding larger clam-shell hatches to the stations but were told that they would still be considered confined spaces.
Above ground PRV stations are large structures specifically designed to house the required watermain, electrical, communications components, and hydraulic elevation specific to each site. As a result, some stations are larger than others.