THE MAGAZINE FOR THE DRAINAGE, WATER & WASTEWATER INDUSTRIES
CASE STUDIES
Lakeside's Clarifier removes all types of settleable solids.
that sticks out like a thumb, so structures had to be built within twenty feet of the water, which of course we took great care to protect. We found more issues than anticipated, but still completed ahead of schedule. The installation of the new oxidation ditch and clarifier all went very smoothly.”
Jay Jeffries, Project Manager at Patterson Horth, added: “This was a learning experience, so there are some things we’d attack a little differently in future,” said. “We all want to make the best out of our site time with no delays, but that said, Clear Creek Conservancy District achieved a very good price ($5M) for the work, and the new-look plant is performing very well indeed.”
Ken Sobbe from FACO continued: “Patterson Horth ensured that there was a smooth transition from the existing to the new equipment, with no major by- passes required. Excavating out the clarifier tank was tricky, but they achieved that with no problems. Despite all the challenges, they did a truly great job; especially in still finishing the work ahead of schedule.”
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The number of homes at Heritage Lake now stands at 1,689, with its popularity certain in time to take it up to its predicted maximum capacity of 2,700. The expansion to 900,000 gallons per day can comfortably handle this anticipated rise in population, with the plant (like the lake) held exclusively for its own community, with no outside sewage coming into it.
CCCD’s Doug Clodfelter continued: “Thirty years ago, Curry & Associates had the vision to design the original facility with room to add an extra oxidation ditch, so that was very good thinking for the future. We’ll always continue to learn and look ahead and make sure we’re ready.
“The upgraded Lakeside plant benefits from automatic controls, which we didn’t have before. This allows us to run the plant in storm mode, so in the event of heavy rain, the new system will help prevent us from getting washed out. Now we can control things without always having to be on site or having to turn up in the middle of the night!
“We now have far more in the way of
operating options with three ditches. We can very gently increase oxygen levels so that the rotors only need to turn at a very slow speed, which thins out our bug population and saves energy.
“I've never seen rotors run so slow before, but its great because unlike before, there’s no foam being created. Previously, half of my tank would often be covered with foam, which looked bad, although all our results were just fine.”
He concluded: “Back in the 1990s, we considered the Lakeside equipment far more forgiving with flows, allowing us to have firm control on handling the strength of the sewage. Over three decades, we’ve had to work on a few gear boxes, but it has an outstanding track record, with the refurbishment of much of it allowing it to continue even further. I liked the equipment over 30 years ago and I like it even more now. Everyone has contributed to ensuring that Heritage Lake continues to be a special place, with an excellent wastewater infrastructure.”
July 2025 | 15
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