The BLM OR Culverts Map Service represents major and minor culvert structures. According to BLM Manual 9100, a culvert is “a conduit or passageway, not classified as a bridge, under a road, trail, or other facility usually consisting of a round pipe, a pipe-arch, or an open or closed bottom box or arch.” Major culverts are defined as “a culvert having a clear opening of more than 35 square feet or multiple installations of culverts placed adjacent or contiguous as units and having a combined clear opening of more than 35 square feet.” . For a complete description of the data, consult the Culverts Spatial Data Standard at: https://www.blm.gov/about/data/oregon-data-management.

The BLM OR Culverts Map Service is created from culverts_web.gdb\CULVERTS_PT_WEB. This map service does not have scale dependencies.

The BLM OR Culverts Map Service represents major and minor culvert structures. According to BLM Manual 9100, a culvert is “a conduit or passageway, not classified as a bridge, under a road, trail, or other facility usually consisting of a round pipe, a pipe-arch, or an open or closed bottom box or arch.” Major culverts are defined as “a culvert having a clear opening of more than 35 square feet or multiple installations of culverts placed adjacent or contiguous as units and having a combined clear opening of more than 35 square feet.” . For a complete description of the data, consult the Culverts Spatial Data Standard at: https://www.blm.gov/about/data/oregon-data-management.

The BLM OR Culverts Map Service is created from culverts_web.gdb\CULVERTS_PT_WEB. This map service does not have scale dependencies.