Results of peak-flow frequency analysis for selected streamgages in or near Montana, based on data through water year 2015 (ver. 1.1, August 2020)

The USGS Wyoming-Montana Water Science Center (WY–MT WSC) recently completed a report 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 50-, 42.9-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEPs) for selected streamgages operated by the WY–MT WSC. In association with the report, this data release presents peak-flow frequency analyses for 99 selected streamgages that serve as examples showing various aspects of the WY-MT WSC frequency-analysis methods.

Data and Resources

Field Value
accessLevel public
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catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier USGS:5aabf6b6e4b081f61aaf036c
metadata_type geospatial
modified 20200831
old-spatial -115.8771, 44.5671, -104.0576, 49.3073
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash 464e1b8094b7ed5b10b994f7bba62403e29f2a0a
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-115.8771, 44.5671], [-115.8771, 49.3073], [ -104.0576, 49.3073], [ -104.0576, 44.5671], [-115.8771, 44.5671]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • annual-exceedance-probability
  • ckan
  • geo
  • geoss
  • hydrology
  • national
  • north-america
  • peak-flow-frequency
  • streamflow
  • united-states
  • usgs-5aabf6b6e4b081f61aaf036c
isopen False
license_id notspecified
license_title License not specified
maintainer Peter McCarthy
maintainer_email pmccarth@usgs.gov
metadata_created 2025-11-22T19:09:05.897493
metadata_modified 2025-11-22T19:09:05.897497
notes The USGS Wyoming-Montana Water Science Center (WY–MT WSC) recently completed a report 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 50-, 42.9-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEPs) for selected streamgages operated by the WY–MT WSC. In association with the report, this data release presents peak-flow frequency analyses for 99 selected streamgages that serve as examples showing various aspects of the WY-MT WSC frequency-analysis methods.
num_resources 2
num_tags 13
title Results of peak-flow frequency analysis for selected streamgages in or near Montana, based on data through water year 2015 (ver. 1.1, August 2020)