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BeginnerShore Dive
Big Blue (Lester Milligan Park)
Iowa, United States
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Best Time
Summer (surface ~70F)
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Big Blue is a flooded clay pit of about 14 acres in Lester Milligan Park on the west side of Mason City, used heavily for open-water training. Attractions include a training platform at about 13 ft, several derelict vehicles along the east side, and a roughly 25 ft sailboat. Maximum depth is about 33-35 ft with visibility around 20 ft.
Quick Facts
Depth Range1.5m – 10.7m
CertificationOpen Water
Gear7mm wetsuit or drysuit, dive flag
HazardsSilt, cold bottom temperatures (~60F at depth in summer)
shorewreck
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