3.b Scandia_City_Council_112018_v1Argo Navis Community Solar
Garden
Remediation Activities
Stormwater Retention System Layout
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Emergency Overflow Location (EOF)
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Additional Best Management Practices
(BMPs) put in place week of September
23, 2018
•Sandbags
•Silt Fence
•Bio Logs
Central Pond from EOF
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Ongoing Remediation Efforts
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Reopen Additional Holding Pond –September 25, 2018
Ongoing Remediation Efforts
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Additional erosion control
blankets and biologs
along perimeter fence
(western boundary) –
October 8, 2018
Additional erosion
control blankets along
entrance to site –
October 10, 2018
Ongoing Remediation Efforts
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Biologs placed and/or
improved around all culverts
along the access road –
October 8, 2018
All excavated soil piles
stabilized –ongoing as
needed
Ongoing Remediation Efforts
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New, larger, temporary holding pond at northern boundary of the site
–November 8, 2018
Ongoing Remediation Efforts
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Commenced November 13, 2018 following dewatering
•Dewatering southernmost basin –commenced November 20,
2018
•Excavation of southernmost basin –Anticipated to commence
November 26, 2018
•Actively working with Watershed District, DNR, MPCA, and City
of Scandia to develop final remediation plans
•Barr Engineering retained to assist with analysis and
development of remediation plan
•Earthwork to continue as long as possible, weather permitting
•Likely that additional work will take place in the spring
•If necessary, additional Best Management Practices added to
Emergency Overflow to prevent any outflow during spring thaw
Next Steps
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