Charles C. Butler, 70, a conservationist who worked for both the Agriculture and Interior Departments before retiring in 1973, died of cancer Monday at George Washington University Hospital.

Mr. Butler came to Washington and joined the Department of Agriculture's Soil Conversation Service in 1936. He traveled for the Service in the South and East.

In 1946, he joined the Billings, Mont., office of the Interior Department's Bureau of Reclamation.

He left government service in 1933 and returned to Washington in 1954 where he worked for five years for the American Farm Bureau.

Mr. Butler rejoined Interior's Bureau of Reclamation as chief of the lands and recreation branch, and later served as chief of the youth conservation programs division before retiring.

He was awarded the meritorious service honor award from Interior in 1973.

After leaving the government, Mr. Butler became active in work for the Church of Jesus Christ of Latter-day Saints and presided over congregations in Garrett County, Md. with his wife.

Mr. Butler was a native of Waukee, Iowa, and earned a bachelor's degree at Iowa State University.

He is survived by his wife, Margaret C., of the home in Montgomery Village and Deep Creek Lake, Md.; a daughter, Lauris E. Hunter, of Potomac; a son, Bruce C., of Billings, Mont.; three brothers, F. Burton, of Winnebago, Minn., F. Burton, of Winnebago, Minn., F. Howard, of Billings, and Leland M., of Minneapolis, and seven grandchildren.

The famiuly suggests that expressions of sympathy be in the form of contributions to the Gaithersburg Ward Building Fund, Church of Jesus Christ of Latter-Day Saints.