The Youth Environmental Service (YES) aims to rehabilitate adjudicated delinquents and to prevent at-risk youth from entering the juvenile justice system by engaging them in environmental work and education programs on federally owned land. YES is a joint program of the U.S. Department of the Interior (DOI) and the Office of Juvenile Justice and Delinquency Prevention (OJJDP). Partnerships are formed among federal, state, local, and private agencies to develop these environmental work programs. States and localities have broad flexibility to design programs suitable to their communities. Six pilot programs are described: two each in Washington D.C., Utah, and Florida. They range from weekend volunteer activities for at-risk preteens to a long-term residential program for serious juvenile offenders. Two programs are nonresidential and four are residential. For each program, information is given on the partners involved, program profile, target population, organizational structure, work or volunteer experience, program results, program costs, and program outlook. A table lists key characteristics of each program. Six factors contributing to successful program implementation are: a mutually beneficial partnership, team effort by partners in planning and implementation, prior experience in youth work programs, assignment of primary supervisory responsibilities to the youth service provider, ability of youth service agencies to absorb some program costs, and meaningful projects. Seven other issues to consider in planning a YES program are given, as are sources for additional information. (TD)