748.5 Matching Existing Structures

From Engineering_Policy_Guide
Revision as of 14:32, 21 December 2011 by Smithk (talk | contribs) (spelling correction)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

When an existing structure that is to be replaced has provided adequate performance, a design exception to match the hydraulic performance of the existing structure is necessary and encouraged. Thorough documentation of the adequate historical performance is included with the Design Exception.