1980 XIII Winter Olympics, Lake Placid, NY cast pulverized snow 16 ft. h. x 16 ft. x 20 ft.

1980 Rock Creek Park, Wash. D.C. XI International Sculpture Conference 12" x 12" fir timbers

1975 University of Minnesota, Minneapolis snow, flashlights, fire 4 ft. h. x 60 ft. dia.

1969 Pomona College Art Gallery White balloon, lead wire, water, colored light 9 ft. h. x 30 ft. x 40 ft.

2011 Reconstructed for "It Happened at Pomona", PST, Getty Research Institute Viewing window detail

2011 Reconstructed for "It Happened at Pomona", PST, Getty Research Institute

1981 The Museum as Site: 16 Projects, LACMA 9 1/2 ft. h. x 21 ft. ea. side 12" x 12" fir timbers

1973 "3 Los Angeles Sculptors", MCA, Chicago particle board 6 ft. h. x 14 ft. dia.

1968 E.A.T. celebration of Apollo moon landing Nine 18" tethered illuminated helium balloons floating above the campus Variable dimentions

1968 Century City, Los Angeles with Judy Chicago and Eric Orr 22 tons dry ice, 9 sequential step pyramids

1972 "15 Los Angeles Sculptors", Pasadena Art Museum sand, screen, wood, concrete blocks

1972 CalArts, Valencia, CA Parrafin, water, dye 3" h. x 18 ft. x 24 ft.

1971 "Allen Bertoldi and Lloyd Hamrol", Fresno State University sand, tinted plastic, drywall, catwalk 20 ft. x 24 ft.

1975 "3 L.A. Sculptors", LAICA burlap bags, sand 30" h. x 25 ft.dia.