Yacolt Mountain Quarry
30500 NE Mystic DR, Yacolt WA 98675
J L Storedahl & Sons Inc.
2233 Talley Way
Kelso, WA 98626
Hours of operation
For truck hauling:
May to October, Monday through Friday, 7:00 am to 6:00 pm
November to April, Monday through Friday, 7:00 am to 5:00 pm
Year Round, Saturdays, 7:00 am to 4:00 pm
No hauling allowed on Sundays and Legal Holidays
Extended hauling hours shall be limited to 18 working days per year between 6:00 and 8:00 pm.
For equipment maintenance, onsite activities and other internal operations:
6:00 am to 8:00 pm
Monday through Friday, 9:00 am to 5:00 pm
No blasting on weekends or legal holidays
Land use documents
Additional documents can be found on Maps Online.
Sampling results for Erionite and Mordenite
- 2019 EPA Site Reconnaissance Sampling and Analysis Report
"The final report from the US EPA documenting the results of the analysis of rock samples taken from the JL Storedahl Yacolt Mountain Quarry and property parcels close to the quarry entrance on June 20, 2019. Samples were collected as part of a site visit to determine if there was evidence of the zeolite minerals mordenite and erionite. Samples were collected from various locations, both on-site and offsite, and analyzed by the EPA Laboratory in Port Orchard, WA. Funding and analysis for this project was provided by the US Environmental Protection Agency – Region 10.
The attached report summarized that there was no mordenite or erionite detected in the samples taken. While there was no mordenite or erionite found in the samples, we can not conclude that there is absolutely no mordenite or erionite at the site. What we are can defend is that given the robust sample locations and the geological formation of the pit, mordenite and erionite are not expected to be present in quantities that would present a health hazard.
Geology plays a significant role in determining where mordenite and erionite might be naturally occurring. The geology of this pit does not appear to be conducive to the formation of mordenite or erionite as evidenced by the study results. Further sampling and analysis therefore is not warranted for this location.
This report is also available on the Southwest Clean Air Agency website."
Paul T. Mairose
Southwest Clean Air Agency
11815 NE 99th St, Suite 1294
Vancouver, WA 98682
Office: 360-574-3058 ext 130
Submit your comments to Clark County using this form.