This week, Rice Lake Construction made major progress on constructing the Oxidation Ditch, the aerobic digester and dewatering building, and the Clarifier. Crews are building the Oxidation Ditch walkway and constructing the anaerobic digester walls, with work including formwork and curing processes. The aerobic digester and dewatering building is nearing completion, with most walls poured. The Clarifier system is also advancing, with a newly completed scum pit. Lastly, the Headworks project continues to move forward, with new walls being formed and poured.
Construction progress is advancing on several projects. The Dewatering building's aerobic digester tanks are curing, with heaters and tarps maintaining optimal conditions. The Headworks project has completed wall pours, with blankets protecting the curing process. The Oxidation Ditch anaerobic tank is nearing its next pour, and Clarifier forms are being set for the scum pit.
Construction progress continues despite cold weather. The Dewatering Building is advancing with wall pours and form installations. The Headworks Building is nearing completion of form and rebar work. Niwot is adding an anaerobic treatment tank to meet regulatory requirements. Gravity and non-portable lines are 80% complete. RLW focused on the Dewatering Building due to snow and mud conditions.
This week's update includes significant construction progress on various components of the Niwot Sanitation District's wastewater treatment facility. The headworks structure is fully prepared for the next concrete pour, with rebar and wall forms in place. The clarifier has passed its water test, and scum pit construction is set to begin shortly. Rice Lake West achieved a major milestone by reinforcing and pouring the oxidation ditch's main walls ahead of the first frost. Additionally, the first concrete walls for the dewatering building have been poured. Lastly, the gravity main and non-potable lines are nearing completion, with installation of manhole inverts currently underway.
Construction of the new sanitation plant continued to make steady progress this week. The new headworks building now includes completed pipes, rebar, and wall forms after a recent concrete pour. The clarifier began water testing, while the oxidation ditch neared completion. A new manhole connected to the future gravity main, and the dewatering building prepared for upcoming pours.
This week, the new sewer main was installed along the back of the property. We will also set forms and rebar for the slab above the wet well and the main level at the headworks. The Oxidation Ditch will continue to see wall additions, with work beginning on laying rebar and forming the walls for the RAS (Return Activated Sludge) and WAS (Waste Activated Sludge) buildings. Additionally, the dewatering building will have rebar and wall forms installed.
This week, we’re excited to share significant progress in the plant construction. The Headworks building is moving forward with the backfilling process, along with the installation of influent pipes and manholes, which are key for the building's infrastructure. At the Secondary Clarifier, the slab and rebar are installed and concrete is poured in all wall forms.
This week, the secondary clarifier and oxidation ditch were successfully reinforced with rebar and poured, with concrete slabs and wall sections continuing to be poured daily. Additionally, all excavations for essential buildings have been completed.
Since the Waste Water Treatment Improvement (WWTP) construction project began in June 2024, Rice Lake West and JVA, the construction and engineering firms hired to build the new sanitation plant, have excavated and demolished old buildings, poured concrete slabs, and removed old pipes.
On May 13th, 2024, the Niwot Sanitation District, along with its design-build partners, Rice Lake Construction and JVA, and its owner's rep, Direct Discharge Consulting, broke ground on its major and much-needed facility upgrade construction.