After the 1870s, ore prices declined.
Even so, by 1900, Jackson Mine had produced over 3.6 million tons of iron ore.
 However, the Jackson Iron Company was suffering financially, with meager profits due to the declining prices and the irregularity of its deposits.
In 1904 the Jackson Mine produced no ore.
 The mine got a reprieve in 1905, when the Jackson Iron Company was purchased by the Cleveland-Cliffs Company.
 But, mine yields were still weak, and the Jackson produced no ore in 1908 and 1916.
 The Jackson Mine closed permanently in 1924, having produced over 4 million tons of ore since its opening in 1856.

By the time it closed, the Jackson Mine contained several working pits, as well as trial shafts, a forge, cross-cuts and drifts; some of the underground workings were close to the surface.
 In the 1950s, the Jackson Mine and portions of the surrounding town of Negaunee were closed due to fears of collapse from undermining.
 In recognition of the historical significance of the Jackson as the area's first iron mine, the site was designated as a Michigan State Historic Site in 1956 and placed on the National Register of Historic Places in 1971.

The mine and area around it were acquired by the city of Negaunee in 2003 and the danger from undermining re-evaluated.
 In 2006, much of "West Old Town Negaunee" and areas around the mine itself were re-opened to the public.
The city developed a trail system through the area.
The overgrown ruins of the early Jackson Mine pit mines can be seen from the trail system.
After the 1870s, ore prices declined. Even so, by 1900, Jackson Mine had produced over 3.6 million tons of iron ore.  However, the Jackson Iron Company was suffering financially, with meager profits due to the declining prices and the irregularity of its deposits. In 1904 the Jackson Mine produced no ore.  The mine got a reprieve in 1905, when the Jackson Iron Company was purchased by the Cleveland-Cliffs Company.  But, mine yields were still weak, and the Jackson produced no ore in 1908 and 1916.  The Jackson Mine closed permanently in 1924, having produced over 4 million tons of ore since its opening in 1856.
By the time it closed, the Jackson Mine contained several working pits, as well as trial shafts, a forge, cross-cuts and drifts; some of the underground workings were close to the surface.  In the 1950s, the Jackson Mine and portions of the surrounding town of Negaunee were closed due to fears of collapse from undermining.  In recognition of the historical significance of the Jackson as the area's first iron mine, the site was designated as a Michigan State Historic Site in 1956 and placed on the National Register of Historic Places in 1971.
The mine and area around it were acquired by the city of Negaunee in 2003 and the danger from undermining re-evaluated.  In 2006, much of "West Old Town Negaunee" and areas around the mine itself were re-opened to the public. The city developed a trail system through the area. The overgrown ruins of the early Jackson Mine pit mines can be seen from the trail system.
Jackson Mine