The U.S. Marine Corps and Senator Barry Goldwater have also made entries in the history of McCormick Railroad Park. As an alternative to building temporary training projects which must then be destroyed, the Marine training program often contributes labor to permanent civic projects. Stillman, who was on the Board of Visitors of the U.S. Naval Academy, prevailed upon the Corps to assist with the track-laying at the park. When neighbors expressed objections to the Department of Defense, Senator Goldwater intervened on behalf of the Society and the track laying was completed. The following is an excerpt from the letter written by Barry Goldwater regarding the marines involvement:

"If you want my honest opinion about all the opposition you are receiving over your railroad, I think it is one of the damnest, uncalled-for bits of action I have ever run in to.

"The armed services has historically given help to communities wherever they could and whenever it was asked for. There is nothing wrong with the Marines doing this kind of work if the Marines have the time. If they don't have the time, I am sure we can call on the Air Force or the Army or the Navy and they will be glad to step in.

If I can help you in any way on this most worthwhile project, just blow the whistle."

The McCormick Railroad Park opened to the public on a beautiful fall morning October 4th, 1975.