Elevation Contours, Cannonsville Reservoir, 2015

From 2013 to 2015, bathymetric surveys of New York City’s six West of Hudson reservoirs (Ashokan, Cannonsville, Neversink, Pepacton, Rondout, and Schoharie) were performed to provide updated capacity tables and bathymetric maps. Depths were surveyed with a single-beam echo sounder and real-time kinematic global positioning system (RTK-GPS) along planned transects at predetermined intervals for each reservoir. A separate set of echo sounder data was collected along transects at oblique angles to the main transects for accuracy assessment. Field survey data was combined with water-surface elevations in a geographic information system to create three-dimensional surfaces representing reservoir-bed elevations in the form of triangulated irregular networks (TINs); the TINs were linearly enforced to better represent geomorphic features within the reservoirs. The linearly enforced TINs were used to create bathymetric maps of the reservoirs; contours were mapped at 2-foot intervals and capacity was calculated at 0.01-foot intervals. This dataset contains the mapped contours at 2-ft elevation intervals.

Data and Resources

Field Value
accessLevel public
bureauCode {010:12}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://ddi.doi.gov/usgs-data.json
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identifier http://datainventory.doi.gov/id/dataset/usgs-58068febe4b0824b2d1d420b
metadata_type geospatial
modified 2020-08-25T00:00:00Z
old-spatial -75.378979535, 42.062385942, -75.169544172, 42.161071468
publisher U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash 2affbb243b97d557a062098779c5caeabd28cbf1ff859889a04131906ca1ab5c
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-75.378979535, 42.062385942], [-75.378979535, 42.161071468], [ -75.169544172, 42.161071468], [ -75.169544172, 42.062385942], [-75.378979535, 42.062385942]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • bathymetry
  • cannonsville-reservoir
  • delaware-county
  • gps-measurement
  • single-beam-echo-sounder
  • usgs-58068febe4b0824b2d1d420b
isopen False
license_id notspecified
license_title License not specified
maintainer Elizabeth Nystrom
maintainer_email nystrom@usgs.gov
metadata_created 2025-09-24T17:10:34.661983
metadata_modified 2025-09-24T17:10:34.661993
notes From 2013 to 2015, bathymetric surveys of New York City’s six West of Hudson reservoirs (Ashokan, Cannonsville, Neversink, Pepacton, Rondout, and Schoharie) were performed to provide updated capacity tables and bathymetric maps. Depths were surveyed with a single-beam echo sounder and real-time kinematic global positioning system (RTK-GPS) along planned transects at predetermined intervals for each reservoir. A separate set of echo sounder data was collected along transects at oblique angles to the main transects for accuracy assessment. Field survey data was combined with water-surface elevations in a geographic information system to create three-dimensional surfaces representing reservoir-bed elevations in the form of triangulated irregular networks (TINs); the TINs were linearly enforced to better represent geomorphic features within the reservoirs. The linearly enforced TINs were used to create bathymetric maps of the reservoirs; contours were mapped at 2-foot intervals and capacity was calculated at 0.01-foot intervals. This dataset contains the mapped contours at 2-ft elevation intervals.
num_resources 2
num_tags 14
title Elevation Contours, Cannonsville Reservoir, 2015