Water Treatment Plant 2 Construction Project

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March 2019

With the warmer March temperatures work on the Water Treatment Plant 2 project has ramped up! While we aren’t up to full speed yet, it’s fun to see some of the new facilities get started.  Here is what we have accomplished in March:

Water Storage Tank Replacement. The floor of the tank is being prepared for concrete with formwork construction and rebar placement. The interior and exterior walls of the tank, which are built on the ground as individual panels that will later be tilted into place, have also been formed and crews are placing rebar. Concrete will be poured for the floor and wall panels over the next few weeks.  

The new 36-inch bypass pipe around the tank is approximately half done. The next step is for the pipe crew to connect to the existing 42-inch pipe, which resides approximately 10 feet below ground, and lay pipe to the north.

Top: The floor of the tank is ready for rebar placement, followed by concrete. Bottom Left: A tank wall panel has had rebar placed and is ready for concrete. Bottom Right: Crews have located where the 36-inch diameter bypass pipe will tie into the existing 42-inch diameter piping and read to lay pipe from the connection.

Basin Modifications. Painting work continues on Basin 3. The existing paint was sandblasted from the equipment and the prime coat of paint has been applied. Over the next two weeks, the second and third coats of paint will be applied.

A look inside at the primer coating of Basin 3. The primer coat is red, the second and third coats will be a light blue color

Lime Feed Improvements and Chlorine Dioxide Disinfection Facilities. Dirt fill to raise the elevation of the ground is resuming with the warmer and drier conditions. The lowest concrete floors of the chlorine dioxide building have also been excavated out and are being prepared for concrete. 

Crews placing rebar for the floor of part of the new chlorine dioxide building. This part of the building, once complete, will house a flow meter that will measure the amount of flow coming into the plant from the water supply wells.

In April, we look forward to the water storage tank taking shape with erection of the interior and exterior wall panels; completion of the painting of Basin 3; completion of the site dirt fill for the Lime Feed and Disinfection facilities (weather permitting); and continued progress on the new chlorine dioxide building. 

Check back regularly for updates as the project progresses, and be sure to follow the City of Olathe on FacebookTwitter, and Instagram for behind-the-scenes looks at construction activities!


February 2019

January and February have been slow months for the project thanks to the weather! The rain, snow, and cold temperatures have hampered, but not stopped, the construction progress. Here is a brief overview of what has been accomplished over the last month:

Water Storage Tank Replacement. This month, crews have been working to dig a hole approximately 10 feet deep and 80 feet wide to fill with gravel as a foundation for the new tank. Work has also begun on a 36-inch pipeline around the tank that will allow for operational flexibility during construction and beyond when the tank is out of service for maintenance.

Water Storage Tank

Preparation of the site and foundation for the new concrete water storage tank.

Basin Modifications. Demolition work was completed on Basin 1. This basin is the oldest basin at the plant and will not be used in the future; therefore, the old equipment was removed. The concrete structure will remain in place to be repurposed in the future.

Metal repairs on the equipment inside Basin 3 were completed. Following the repairs, a tent over the basin was constructed for the purpose of containing material and keeping the inside of the basin warm for painting. Over the next two months, the existing paint will be sandblasted off the equipment and it will be repainted.

Basin 3

Basin 3 is covered with a tent for sandblasting and painting of the equipment inside.

Lime Feed Improvements and Chlorine Dioxide Disinfection Facilities. Before these facilities can be started in earnest, dirt must be brought in to raise the elevation of the west side of the site five to eight feet. This process requires dry ground conditions and temperatures above freezing. January and February have been wet and cold with only about two weeks’ worth of good weather for compacting the dirt; therefore, only about 20% of the new dirt has been placed.

New Dirt

Dirt fill for new Lime Feed and Disinfection buildings.

In March, we look forward to starting on the new concrete water tank, painting of Basin 3, and completing site dirt fill for the Lime Feed and Disinfection facilities if the weather cooperates.

Check back regularly for updates as the project progresses, and be sure to follow the City of Olathe on FacebookTwitter, and Instagram for behind-the-scenes looks at construction activities!


January 2019

In December 2018, the City of Olathe Public Works Department started on exciting upgrades at Water Treatment Plant 2 (WTP2.) Originally built in 1964 and last expanded in 2006, WTP2 provides drinking water to approximately 135,000 residents in Olathe and surrounding areas.

The City has partnered with Crossland Heavy Contractors, Black & Veatch, and HDR to design and construct approximately $17 million of upgrades at WTP2 over the next two years. These upgrades will rehabilitate critical treatment plant infrastructure, improve the taste and quality of the drinking water, and ensure reliable operation into the future for delivering delicious drinking water to all customers.

The major components of the project are:

  • Lime Feed Improvements. Lime is added to the treatment basins to soften the water. New lime storage silos and a building to house associated equipment will replace existing silos and equipment. The new facilities will provide improved safety for staff who operate and maintain the system and will ensure reliable operation of the treatment process.
  • Basin Modifications. The plant has three treatment basins that, with the lime addition, soften and remove particles in untreated water. Two treatment basins need equipment replacement, while equipment in the third basin will be repaired and repainted. These improvements will result in improved treatment efficiency and will ensure the integrity of the softening process now and into the future.
  • Water Storage Tank Replacement. The steel water storage tank will be demolished, and a new concrete storage tank will be built in its place. The new concrete tank will have an extended service life to store treated water until it is pumped into town.
  • Chlorine Dioxide Disinfection Facilities. Disinfecting drinking water is an important step, removing microbial pathogens that may be present in untreated water from the Kansas River. New chlorine dioxide disinfection facilities will replace existing disinfection facilities. The new facilities will ensure that all disinfection processes comply with federal drinking water regulations, while also improving the taste and odor of the drinking water.

The City of Olathe takes pride in providing high quality water to all customers, and these upgrades will ensure that remains the case into the future. Check back regularly for updates as the project progresses, and be sure to follow the City of Olathe on Facebook, Twitter, and Instagram for behind-the-scenes looks at construction activities!