6 datasets found
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Federal
National Hydrography Dataset Plus High Resolution (NHDPlus HR) - USGS National Map Downloadable Data Collection
Department of the Interior —
The High Resolution National Hydrography Dataset Plus (NHDPlus HR) is an integrated datset of geospatial data layers, including the most current National Hydrography... -
Federal
National Hydrography Dataset (NHD) - USGS National Map Downloadable Data Collection NGDA
Department of the Interior —
The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's... -
Federal
S&T Project 21045 Final Report: Detection of Voids Behind Spillways, Conduits, Canals, Tunnels, and Siphons
Department of the Interior —
Detection of voids along conduits has been attempted in the past using various non-invasive technologies. While progress has been made, underlying challenges exist... -
Federal
S&T Project 21045 Final Report: Repair of Voids Behind Spillways, Conduits, Canals, Tunnels, and Siphons
Department of the Interior —
Voids form as a consequence of the deteriorated state or poor design of the structures they are associated with. There are a variety of different mechanisms that can... -
Federal
S&T Project 21045 Final Report: Causes of Voids Behind Spillways, Conduits, Canals, Tunnels, and Siphons
Department of the Interior —
The presence of voids behind or below a structure can limit operations at best and at worst be a precursor to failure. Voids could lead to hydraulic jacking, ground... -
Federal
S&T Project Number 1885 Final Report: Collaborative Studies to Reduce Flow Induced Damage on Concrete Hydraulic Surfaces
Department of the Interior —
Cavitation and erosion damage to concrete hydraulic surfaces such as spillways and stilling basins are a problem for facilities operated by the Brazilian Government...
6 datasets found