river mile

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Lozier Canyon. River Mile 662.7.  April 2012.

Lozier Canyon. River Mile 662.7. April 2012.

Rio Grande vegetation monitoring, Lozier Canyon Photopoint, April 2012.

Lozier Canyon. River Mile 662.7.  April 2012.

Lozier Canyon. River Mile 662.7. April 2012.

Rio Grande vegetation monitoring, Lozier Canyon Photopoint, April 2012. Public domain photograph of a desert, free to use, no copyright restrictions image - Picryl description

Below Mesquite Canyon. River Mile 669. April 2012.

Below Mesquite Canyon. River Mile 669. April 2012.

Rio Grande vegetation monitoring, Below Mesquite Canyon photopoint at river mile 669, April 2012.

Martin Canyon. River Mile 666.25. April 2012.

Martin Canyon. River Mile 666.25. April 2012.

Rio Grande vegetation monitoring, Martin Canyon photopoint, April 2012.

Martin Canyon. River Mile 666.25. April 2012.

Martin Canyon. River Mile 666.25. April 2012.

Rio Grande vegetation monitoring, Martin Canyon photopoint, April 2012.

Lozier Canyon. River Mile 662.7.  April 2012.

Lozier Canyon. River Mile 662.7. April 2012.

Rio Grande vegetation monitoring, Lozier Canyon Photopoint, April 2012.

Martin Canyon. River Mile 666.25. April 2012.

Martin Canyon. River Mile 666.25. April 2012.

Rio Grande vegetation monitoring, Martin Canyon photopoint, April 2012.

Lozier Canyon. River Mile 662.7.  April 2012.

Lozier Canyon. River Mile 662.7. April 2012.

Rio Grande vegetation monitoring, Lozier Canyon Photopoint, April 2012.

Big Canyon. River Mile 749.5. April 2013.

Big Canyon. River Mile 749.5. April 2013.

Rio Grande vegetation monitoring, "Big Canyon" photopoint at river mile 749.5, April 2013.

Big Canyon. River Mile 749.5. March 2014.

Big Canyon. River Mile 749.5. March 2014.

Rio Grande vegetation monitoring, "Big Canyon" photopoint at river mile 749.5, March 2014.

Norden Chute, Niobrara National Scenic River, 2015.

Norden Chute, Niobrara National Scenic River, 2015.

Norden Chute is the only Class IV rapid on the river. It's recommended that you exit the river before reaching this point. If you're looking for a scenic vista don't miss this view at river mile 35.2.

Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, Greensboro, Greene County, PA

Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, ...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Improvements. Individ... More

Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, Greensboro, Greene County, PA

Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, ...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Improvements. Individ... More

Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, Greensboro, Greene County, PA

Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, ...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Improvements. Individ... More

Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, Greensboro, Greene County, PA

Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, ...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Improvements. Individ... More

Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, Greensboro, Greene County, PA

Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, ...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Improvements. Individ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania County, WA

Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...

Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

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