TOUR: Kassler Water Treatment Plant Tour

Date and Time: 
Wednesday, September 18, 2019 - 10:00am to 1:00pm
Holly Geist, Denver Water Historian


In 1902, the Platte Cañon Filtration Plant, later renamed Kassler, was opened at the base of Waterton Canyon by the present-day Chatfield Reservoir. Kassler, which used the English slow-sand filter process, was the first of its kind west of the Mississippi River.

Kassler’s underground infiltration galleries were built in 1890, the filter beds completed in 1906, and the reservoir and pump station were built in 1972. A whole town was built around the plant to operate and maintain the facility. At the height of its operation, Kassler delivered more than 50 million gallons per day of treated drinking water to the residents of Denver. It was named a national water landmark in 1979.

By 1985, Kassler ceased operations because it was unable to keep up with demand. Now the buildings and nearby facilities are used for educational purposes.

Holly Geist, Historian with Denver Water, will lead this fascinating story and tour of the now-forgotten town and treatment plant.  Bring your lunch, and sturdy walking shoes, walking stick, hat, and sense of adventure as we travel off of the beaten path.   Following the talk and tour we can enjoy our lunch and some goodies inside the cool classroom, or sit on the front porch and dream of days gone by.

Parking is limited in the Kassler Treatment Plant, car pooling is encouraged.  If the lot is full you may park across the road in the Waterton Canyon Trail Parking Lot. 

Transportation is on your own to the Plant.   Address is 11300 Waterton Rd. Littleton,  80125

$10 HRHS Members    $12 non-HRHS Members

Once Registered, please mail your check right way, payable and to:

HR Historical Society, PO Box  631334, Highlands Ranch, CO  80163


Kassler Treatment Center
Parking Lot
11300 Waterton Rd
Littleton 80125

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