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PROJECT ALERT NOTICE (MD) Central Maryland flood response

Date: Wed, 03 Aug 2016 09:53:57 EDT

Summary: Extreme rainfall associated with localized thunderstorm activity caused flash flooding in Ellicott City, MD and surrounding vicinity on the evening of Saturday, July 30, 2016.

Rainfall totaling up to 6 inches in a two-hour time period caused flash flooding in Ellicott City, MD and surrounding vicinity on the evening of Saturday, July 30, 2016. Affected watersheds include portions of the Little Patuxent River, Patapsco River, and Gwynns Falls.

The USGS response continues on Wednesday, August 3, 2016 with deployment of four field crews (eleven staff members) to collect crest-stage gage data and identify high-water marks at six gages affected by the storm. Data collected will be used to compute peak streamflows caused by the storm.

USGS has been granted access to the flood-affected areas of Ellicott City, MD to allow identification and documentation of high-water marks for use in future flood-risk management investigations for the region. The USGS visit will occur on the morning of Thursday, August 4, 2016.

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