Born-Digital or AnalogAnalogTranscriptSand and gravel industry. Colorado Gravel company, Specification Aggregates CoMpany, taking gravel from Lookout Mountain causes citizen concern. Post Ap 1.7, 1972 p.28 Sand and gravel interests offer rehabilitation proposal after mirn^.nc- Adams County area. Post Jy 12, 1972 p.19 Ada;.:s County Planning Commission recommends zoring to allow gravel. pit operation. Post Ag 30, 1972 p.3 Flatiron Sand and Gravel Co. given permit to mine in area of White Rock Natural Landmark in Boulder County. RMN Ja 9 1973 p.1.01 Post Ja ^, 1973 p.19CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
Sand and gravel industry. Colorado, [545136]. Denver Public Library Digital Collections, accessed 10/08/2026, https://digital.denverlibrary.org/nodes/view/1583594
