Leonard Sparks. Newburgh to seek help with contaminated water under Superfund program. Times Herald-Record. 20 May 2016 [25 May 2016]. (原始内容存档于2018-05-23)
鷹礦的開採始於1880年代,最初開採黃金和白銀,但在運營後期主要開採鋅。該礦於1984年關閉,並成為環境保護局(EPA)超級基金(英语:Superfund)的所在地。 Eagle Mine site summary. Colorado Department of Health and Government
Education Program. [2014-07-09]. (原始内容存档于2020-11-02). EcoRover, a blog about Superfund and other environmental issues in the upper Clark Fork River basin. [2020-12-19]