Denver Mining Club Field Trip to Frei Aggregate Quarry. On Tuesday, May 24, we’ll meet at 10 a.m. at the quarry, on US Hwy. 6 near the base of Floyd Hill, east of Idaho Springs, for a tour of the property. Attendees must wear a hard hat, safety vest, and hard-toed shoes or boots. Bring snacks or a picnic lunch and consider carpooling if you wish.
