Plans, Specifications and Estimates (P. S. & E.) Bureau
Design Directives
| 2017 Design Directives | 2016 Design Directives |
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| 2014 Design Directives | 2015 Design Directives |
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| 2013 Design Directives |
2012 Design Directives |
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| 2011 Design Directives |
2010 Design Directives |
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| 2009 Design Directives | 2008 Design Directives |
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| 2007 Design Directives | 2006 Design Directives |
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| 2005 Design Directives | 2004 Design Directives |
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| 2003 Design Directives | 2002 Design Directives |
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| 2001 Design Directives | 2000 Design Directives |
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