Miller Creek Compost Facility
1015 SW 174TH PL
Normandy Park, WA 98166-3465
Compost Plant: 206-242-4128
The compost process at the Miller Creek Plant produces a Class A product similar to that marketed at your local garden supply store as top soil.
It's competitively priced, tax is included. You can pick it up directly at the plant (see map on right). Open Monday thru Friday 7:30 a.m. to 3:30 p.m.
A look at the compost process:
We mix anaerobically digested and dewatered Biosolids with wood chips from local tree cutting service companies and place the mixture in the compost building located at Miller Creek. When the compost material has achieved a temperature greater than 131 degrees Fahrenheit for a minimum of 3 days, it can then be rolled into the next compost bin.
The rolling of the piles is done a minimum of three times, and sometimes as many as five times. Pile temperatures are taken daily, and adjustments to air blowers are made to keep the compost in a temperature range of 131 to 150 degrees.
After compost cures it is sent to an independent laboratory for fecal coliform analysis. Strict Department of Ecology and EPA guidelines for pathogen reduction are followed.
Compost is not made available for sale until all regulations have been met. This process can take from 90 to 180 days from start to completion.