Oklahoma Water Resources Board the Water Agency

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2015 High Water Mark Project

Flooding in Oklahoma during 2015 (May 5-June 19), identified by FEMA as Disaster DR-4222, produced cumulative flood levels exceeding 1000-year modeling. These flooding events provided an opportunity for FEMA, the USACE, and the OWRB to work together to document more than 980 High Water Mark (HWM) signs across several Oklahoma counties. HWM coordinates, site photographs, and field notes were collected using Mobile Information Collection Application (MICA) software, and then analyzed to produce map books by watershed and stream name, an interactive map viewer, depth grids (in conjunction with IFSAR), inundation maps, and project summaries by county.

Launch FEMA's Interactive High Water Mark Viewer
Download High Water Mark Maps and Supplemental Data

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Last updated: February 16, 2018

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