The mission of the Coffeen Land Trust Board is to honor, in perpetuity, the wishes of Dorothy B. Coffeen clearly stated in the warranty deed transferring her property to the Sierra Club Foundation, signed on September 17, 1976: [It is] “the Grantee’s expressed intensions and promise to conserve and preserve the natural beauty and characteristics of the area called the Coffeen Nature Preserve for educational, conservation, and scientific purposes limited by the size, sensitivity, and character of the land conveyed…”