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The Great Works (20 feet high) and Veazie (30 feet high) dams on the lower section of the Penobscot River in Maine were removed during the summers of 2012 and 2013, respectively. Channel cross sections upstream and downstream of these dams from just below the Milford Dam to the head‐of‐tide at Eddington Bend just below the former Veazie Dam were surveyed before and after the dams were removed in order to assess changes in the channel as a result of the dam removals. Cross sections were referenced to stable monuments set on the left and right banks of each cross section to ensure consistent cross section locations. Data for each cross section include total station theodolite survey data integrated with Acoustic...
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This data release contains U.S. Geological Survey (USGS) field survey data files for selected stream crossing locations in the Squannacook River Basin, north-central Massachusetts. The surveyed stream cross sections and culvert dimensions were used in developing U.S. Army Corps of Engineers (USACE) Hydrologic Engineering Center’s River Analysis System (HEC-RAS) hydraulic models. The data also include original survey notes, survey sketches, and photographs for each field survey conducted at stream crossing locations. The field survey documented and surveyed five stream cross sections for the upstream approach, upstream culvert face, top of road deck, downstream culvert face, and downstream exit. Global Navigation...
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This project folder contains all the Wyoming StreamStats data and analyses by the U.S. Geological Survey, Wyoming - Montana Water Science Center. Sets of data and analyses are published as data releases within this folder as child items.
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This data release contains links to two child items containing hydrology and hydraulic modeling data and supplemental geospatial data for selected stream crossing sites in the Squannacook River Basin in north-central Massachusetts. The child item named “Hydraulic model data for selected stream crossing sites in the Squannacook River Basin, North-Central Massachusetts” contains U.S. Army Corps of Engineers’ Hydrologic Engineering Center River Analysis System (HEC-RAS) hydraulic model files along with field survey data associated with each stream crossing location. This data release also includes a data dictionary defining culvert designs, site locations, modeled flows and water surface elevations, and aquatic habitat...
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The USGS Wyoming-Montana Water Science Center (WY–MT WSC) completed a report (Sando and McCarthy, 2018) documenting methods for peak-flow frequency analysis following implementation of the Bulletin 17C guidelines. The methods are used to provide estimates of peak-flow quantiles for 66.7-, 50-, 42.9-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEPs) for selected USGS streamgages. This data release presents peak-flow frequency analyses for selected streamgages in the Upper Yellowstone River Basin, based on data through water year 2022, using methods described by Sando and McCarthy (2018).
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In August 2020, the U.S. Geologic Survey acquired high-precision survey data of first-floor doorway threshold elevations at buildings in the Lake Champlain floodplain in Vermont. For a representative sample of buildings within the 106 feet (National Geodetic Vertical Datum of 1929) stage boundary of the regional flood-inundation map (Flynn and Hayes, 2019), 153 buildings, or nearly 12 percent of the total buildings, were surveyed. These data consist of Global Navigation Satellite System-derived orthometric heights in the North American Vertical Datum of 1988, which were measured by trigonometric leveling with a total station. Included in this data release are the raw and processed leveling control point data (unprocessed...
    map background search result map search result map Survey of first-floor elevations of buildings in the Lake Champlain floodplain, Vermont, 2020 Penobscot River Cross Section Data pre- and post-Dam Removal Hydraulic Models and Supplementary Data for Selected Stream Crossing Sites in the Squannacook River Basin, North-Central Massachusetts Survey Data for Hydraulic Models at Selected Stream Crossing Sites in the Squannacook River Basin, North-Central Massachusetts Wyoming StreamStats by the U.S. Geological Survey, Wyoming - Montana Water Science Center Peak-flow frequency analyses for selected streamgages in the Upper Yellowstone River Basin, based on data through water year 2022 PeakFQ version 7.4.1 specifications file for peak-flow frequency analyses for selected streamgages in the Upper Yellowstone River Basin, based on data through water year 2022 WATSTORE Peak flow data for selected streamgages in the Upper Yellowstone River Basin, based on data through water year 2022 Hydraulic Models and Supplementary Data for Selected Stream Crossing Sites in the Squannacook River Basin, North-Central Massachusetts Survey Data for Hydraulic Models at Selected Stream Crossing Sites in the Squannacook River Basin, North-Central Massachusetts Survey of first-floor elevations of buildings in the Lake Champlain floodplain, Vermont, 2020 Penobscot River Cross Section Data pre- and post-Dam Removal Peak-flow frequency analyses for selected streamgages in the Upper Yellowstone River Basin, based on data through water year 2022 PeakFQ version 7.4.1 specifications file for peak-flow frequency analyses for selected streamgages in the Upper Yellowstone River Basin, based on data through water year 2022 WATSTORE Peak flow data for selected streamgages in the Upper Yellowstone River Basin, based on data through water year 2022 Wyoming StreamStats by the U.S. Geological Survey, Wyoming - Montana Water Science Center