![]() ![]() ![]() Distribution Unlimited CPD-69Ģ REPORT DOCUMENTATION PAGE Form Approved OMB No Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the date needed, and completing and reviewing the collection of information. 1 Table of Contents US Army Corps of Engineers Hydrologic Engineering Center HEC-RAS River Analysis System Hydraulic Reference Manual Version 4.1 January 010 Approved for Public Release.
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