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Flooding in Idaho

USGS hydrographer wades a flooded road to collect streamflow data from the Big Wood River below Magic Dam, March 31, 2017

As springtime temperatures rise, the melting of higher than normal winter snowpack has caused flooding on rivers and streams throughout Idaho, eastern Oregon, and northern Nevada. Hydrographers from our Post Falls, Idaho Falls, and Boise field offices have responded quickly to collect data and document high-water marks, to repair flooded streamgages, and to install emergency streamgages to provide additional data for emergency response managers.

You can track flows form any of our real-time streamgages on the web, by subscribing to USGS WaterAlert, or by texting or e-mailing a streamgage station number to the USGS WaterNow service.

Monthly Hydrologic Update

May 2017 Idaho Hydrologic Update

Our monthly Idaho Hydrologic Update enters its second year of keeping you informed about Idaho's water resources. Each month, we summarize significant findings from our hydrologic data networks; announce new studies; and let you know how we support our local, state, Federal, and tribal partners with reliable, unbiased science.

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Current Streamflow Conditions

Today's streamflow conditions. Click to see more real-time data.

Centennial Streamgages

More than two dozen Idaho streamgages offer more than 100 years of water data. Click the Centennial Streamgage badge below to access data from these streamgages.

Idaho's centennial streamgages with more than 100 years of recorded data

Latest Publications

Bridge scour countermeasure assessments at select bridges in the United States, 2014–16

Report cover. Click to read report.

In 2009, the Federal Highway Administration published Hydraulic Engineering Circular No. 23 (HEC-23) to provide specific design and implementation guidelines for bridge scour and stream instability countermeasures. However, the effectiveness of countermeasures implemented over the past decade following those guidelines has not been evaluated. In this report and the associated data release, our scientists present the results of their systematic evaluation of bridge scour countermeasures at 14 sites in four states.

A groundwater-flow model for the Treasure Valley and surrounding area, southwestern Idaho

Report cover. Click to read report.

In partnership with the Idaho Department of Water Resources and the Idaho Water Resource Board, we will construct a numerical groundwater-flow model of the Treasure Valley and surrounding area. Resource managers will use the model to simulate potential human and climatic effects on groundwater for water-supply planning and management. As part of model construction, the hydrogeologic understanding of the aquifer system will be updated with information collected during the last two decades and new data collected for the study.