Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: The open hearth steelmaking plant of the Monessen Works was built in 1908. Pittsburgh Steel installed eight 95 ton, basic open hearth furnaces in a 1,055 x 280 feet steel-frame, metal-clad buildi More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 3 Blast Furnace, also known as "Jane," was blown-in in 1948. This furnace was considerably larger than either Blast Furnace No. 1 or No. 2, with a hearth diameter of 28 feet, and 18 tuyeres. More
Significance: No. 1 and No. 2 Blast Furnaces were blown-in in 1913. The two furnaces were nearly identical in design and capacity at the time of construction and shared a common cast house, an unusual arrangem More
Significance: No. 1 and No. 2 Blast Furnaces were blown-in in 1913. The two furnaces were nearly identical in design and capacity at the time of construction and shared a common cast house, an unusual arrangem More
Significance: No. 1 and No. 2 Blast Furnaces were blown-in in 1913. The two furnaces were nearly identical in design and capacity at the time of construction and shared a common cast house, an unusual arrangem More
Significance: No. 1 and No. 2 Blast Furnaces were blown-in in 1913. The two furnaces were nearly identical in design and capacity at the time of construction and shared a common cast house, an unusual arrangem More
Significance: No. 1 and No. 2 Blast Furnaces were blown-in in 1913. The two furnaces were nearly identical in design and capacity at the time of construction and shared a common cast house, an unusual arrangem More
Significance: No. 1 and No. 2 Blast Furnaces were blown-in in 1913. The two furnaces were nearly identical in design and capacity at the time of construction and shared a common cast house, an unusual arrangem More
Significance: No. 1 and No. 2 Blast Furnaces were blown-in in 1913. The two furnaces were nearly identical in design and capacity at the time of construction and shared a common cast house, an unusual arrangem More
Significance: No. 1 and No. 2 Blast Furnaces were blown-in in 1913. The two furnaces were nearly identical in design and capacity at the time of construction and shared a common cast house, an unusual arrangem More
Significance: No. 1 and No. 2 Blast Furnaces were blown-in in 1913. The two furnaces were nearly identical in design and capacity at the time of construction and shared a common cast house, an unusual arrangem More
Significance: No. 1 and No. 2 Blast Furnaces were blown-in in 1913. The two furnaces were nearly identical in design and capacity at the time of construction and shared a common cast house, an unusual arrangem More
Significance: No. 1 and No. 2 Blast Furnaces were blown-in in 1913. The two furnaces were nearly identical in design and capacity at the time of construction and shared a common cast house, an unusual arrangem More
Significance: No. 1 and No. 2 Blast Furnaces were blown-in in 1913. The two furnaces were nearly identical in design and capacity at the time of construction and shared a common cast house, an unusual arrangem More
Significance: No. 1 and No. 2 Blast Furnaces were blown-in in 1913. The two furnaces were nearly identical in design and capacity at the time of construction and shared a common cast house, an unusual arrangem More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int More