Significance: The Rustic Bridge is an example of the Melan arch system of concrete construction, and as such is an example of the reinforced-concrete bridge systems introduced in the U.S. in the late nineteenth More
Significance: The Rustic Bridge is an example of the Melan arch system of concrete construction, and as such is an example of the reinforced-concrete bridge systems introduced in the U.S. in the late nineteenth More
Significance: The Rustic Bridge is an example of the Melan arch system of concrete construction, and as such is an example of the reinforced-concrete bridge systems introduced in the U.S. in the late nineteenth More
Significance: The Rustic Bridge is an example of the Melan arch system of concrete construction, and as such is an example of the reinforced-concrete bridge systems introduced in the U.S. in the late nineteenth More
Significance: The Rustic Bridge is an example of the Melan arch system of concrete construction, and as such is an example of the reinforced-concrete bridge systems introduced in the U.S. in the late nineteenth More
Significance: From 1907 to 1908, the Sandy Hill Bridge was the longest multiple span, reinforced-concrete arch bridge in the world. Its design was also the first to employ the use of separately molded concrete More
Significance: From 1907 to 1908, the Sandy Hill Bridge was the longest multiple span, reinforced-concrete arch bridge in the world. Its design was also the first to employ the use of separately molded concrete More
Significance: From 1907 to 1908, the Sandy Hill Bridge was the longest multiple span, reinforced-concrete arch bridge in the world. Its design was also the first to employ the use of separately molded concrete More
Significance: From 1907 to 1908, the Sandy Hill Bridge was the longest multiple span, reinforced-concrete arch bridge in the world. Its design was also the first to employ the use of separately molded concrete More
Significance: From 1907 to 1908, the Sandy Hill Bridge was the longest multiple span, reinforced-concrete arch bridge in the world. Its design was also the first to employ the use of separately molded concrete More
Significance: From 1907 to 1908, the Sandy Hill Bridge was the longest multiple span, reinforced-concrete arch bridge in the world. Its design was also the first to employ the use of separately molded concrete More
Significance: This was the largest of the several Melan-arch bridges built in Rock Creek park in the first years of the twentieth century. Its Neoclasscial detailing differentiates the Old Harvard Street Bridg More
Significance: This was the largest of the several Melan-arch bridges built in Rock Creek park in the first years of the twentieth century. Its Neoclasscial detailing differentiates the Old Harvard Street Bridg More
Significance: This was the largest of the several Melan-arch bridges built in Rock Creek park in the first years of the twentieth century. Its Neoclasscial detailing differentiates the Old Harvard Street Bridg More
Significance: This was the largest of the several Melan-arch bridges built in Rock Creek park in the first years of the twentieth century. Its Neoclasscial detailing differentiates the Old Harvard Street Bridg More
Significance: This was the largest of the several Melan-arch bridges built in Rock Creek park in the first years of the twentieth century. Its Neoclasscial detailing differentiates the Old Harvard Street Bridg More
Significance: An example of early twentieth-century reinforced concrete construction using the "Melan-von Emperger" systems of steel reinforcement. The western two spans were constructed as part of a grade cro More
Significance: An example of early twentieth-century reinforced concrete construction using the "Melan-von Emperger" systems of steel reinforcement. The western two spans were constructed as part of a grade cro More
Significance: An example of early twentieth-century reinforced concrete construction using the "Melan-von Emperger" systems of steel reinforcement. The western two spans were constructed as part of a grade cro More
Significance: An example of early twentieth-century reinforced concrete construction using the "Melan-von Emperger" systems of steel reinforcement. The western two spans were constructed as part of a grade cro More