Given a sentence in Spanish, provide an equivalent paraphrased translation in German that retains the same meaning both through the translation and the paraphrase.

La gestión conjunta del memorial por parte de la Marina de los Estados Unidos y el Servicio de Parques Nacionales se fundó el 9 de septiembre de 1980.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Die gemeinsame Verwaltung der Gedenkstätte durch den National Park Service und die United States Navy wurde am 9. September 1980 eingerichtet.