ID#: 8634
This historic 1917 map, which had been digitally enhanced, depicted the system of water intake, and sewer outlet into Lake Superior at Two Harbors, Minnesota. As was one of a series of instructional drawings, this image was used by the Minnesota Board of Health to train the state's public health workers. The purpose of these images, and the training was focused on protecting potable water supplies from bacterial contamination, due to incorrect disposal of waste, including sewage that might foul ground water, lakes, rivers, and streams.
High Resolution: Click here for hi-resolution image (18.71 MB)
Content Provider(s): CDC/ Librarians Melissa Rethlefsen and Marie Jones
Creation Date: 1917
Photo Credit:
Links: Minnesota Health Department
Minnesota Health Department; R.N. Barr Library
CDC Organization
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Copyright Restrictions: None - This image is in the public domain and thus free of any copyright restrictions.