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Location & Design Manual, Volume 2

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Location & Design Manual, Volume 2 Ohio Department of Transportation Central Office • 1980 West Broad Street • Columbus, OH 43223 John Kasich, Governor • Jerry Wray, Director Date: January 20, 2017 To: All Current Holders of the Location and Design Manual, Volume 2 Re: Location and Design Manual, Volume Two Revisions Transmitted herewith are revisions to the Location and Design Manual, Volume 2. The following revisions have been made: • Revisions / Additions in Red • Preface – Added clarification to Purpose • 1002.2.4 – Updated last sentence of last paragraph • 1005.1.4 – Updated guidance for documentation requirements in FEMA Zones • 1104.1– Added paragraph noting the availability of Sample Plan Sheets • 1105.1– Added paragraph noting the availability of Sample Plan Sheets • 1115.3 – Clarified language on which projects are exempt from water quantity treatment • 1115.3 – Moved stream protection BMP to 1117.8 as a stand-alone BMP • 1115.6.1 – Changed “pavement” to “impervious area” • 1115.6.2 – Changed language for consistency with other sections. • 1115.6.3 – Added new section Pedestrian Facilities and Shared Use Paths • 1115.7 – Clarified language for “Aix” and “Ain” with no changes to requirements • 1116, 1117 – Added “EDA treatment credit” for consistency with L&D Vol. 3 requirements for the Project Site Plan throughout the sections • 1116.2 – Added reference to BMP design resources on ODOT’s website • 1117.2 – Changed “vegetated” to “grassed” across the section • 1117.2.1 – Removed prohibition of discharging an underdrain outlet to a Vegetated Filter Strip. • 1117.2.1 – Added new section for narrow Vegetated Filter Strips for pedestrian facilities and shared use paths. • 1117.2.2 – Clarified treatment credit for Vegetated Biofilters. • 1117.2.2 – Added requirement to coordinate with district maintenance if the foreslope of a VBF is steeper than 3:1. • 1117.3.2 – Added B. WQv drawdown criteria • 1117.5 – Changed “paved” to “impervious” across the section • 1117.8 – Added new section Stream Grade Control • Appendix A – Added Form LD-52; Letter of Notification Template The online revisions of the Location and Design Manual, Volume 2 can be found at http://www.dot.state.oh.us/Divisions/Engineering/Hydraulics/Pages/default.aspx in PDF format. Technical questions or recommended changes should be directed to Jeff Syar (614) 275-1373 or Matt Cozzoli (614) 466-3152. Respectfully, Jeff Syar, P.E. Office Administrator, Office of Hydraulic Engineering An Equal Opportunity Employer Notice To ensure proper receipt of future revisions to the manual, please visit the online Design Reference Resource at: http://www.dot.state.oh.us/drrc/Pages/default.aspx This manual is produced by the Office of Hydraulic Engineering. Technical questions, recommended changes, or suggestions should be sent to: Ohio Department of Transportation Attn: Jeffrey Syar, P.E. Administrator, Office of Hydraulic Engineering 1980 West Broad Street Columbus, Ohio 43223 (614) 275-1373 LOCATION AND DESIGN MANUAL VOLUME TWO DRAINAGE DESIGN The OHIO DEPARTMENT of TRANSPORTATION Table of Contents (Revised January 2017) Preface...........................................................................................................................................................i Ohio Counties...............................................................................................................................................iii Glossary of Terms........................................................................................................................................iv Design Reference Documents……………………………………………………………………………………..ix 1000 Drainage Design Criteria 1001 Hydraulic Design Criteria................................................................................................................10-1 1001.1 Responsibilities...............................................................................................................10-1 1001.2 Natural Streams..............................................................................................................10-1 1001.3 Feasibility Study Activities ..............................................................................................10-1 1002 Pipe Criteria....................................................................................................................................10-1 1002.1 Introduction.....................................................................................................................10-1 1002.2 General Requirements ...................................................................................................10-2 1002.3 Conduit Types ................................................................................................................10-3 1003 Hydrology .......................................................................................................................................10-6 1003.1 Estimation of Magnitude and Frequency of Floods on Ohio Streams ............................10-6 1004 Flood Clearance .............................................................................................................................10-7 1004.1 General...........................................................................................................................10-7 1004.2 Design Year Frequency..................................................................................................10-7 1005 Highway Encroachments on Flood Plains......................................................................................10-7 1005.1 General...........................................................................................................................10-7 1005.2 Type of Studies.............................................................................................................10-10 1006 Allowable Headwater....................................................................................................................10-10 1006.1 Design Storm................................................................................................................10-10 1006.2 Culvert Headwater Controls .........................................................................................10-10 1006.3 Bridge Headwater Control ............................................................................................10-11 1006.4 Controls Specific to Flood Insurance Studies (FIS)......................................................10-12 1007 Pipe Removal Criteria...................................................................................................................10-12 1007.1 General.........................................................................................................................10-12 1007.2 Asbestos pipe ...............................................................................................................10-12 1008 Conduit Design Criteria ................................................................................................................10-13 1008.1 Corrugated and Spiral Rib Steel and Aluminum Pipes, and Corrugated Steel and Aluminum Pipe Arches .............................................................................................................10-13 1008.2 Rigid Pipe .....................................................................................................................10-14 1008.3 Thermoplastic Pipe.......................................................................................................10-14 1008.4 Corrugated Steel and Aluminum Box Culverts and Corrugated Steel Long Span Culverts. ..................................................................................................................................................10-14 1008.5 Precast Reinforced Concrete Box Culverts ..................................................................10-14 1008.6 Precast Reinforced Concrete Three-Sided Flat-Topped Culverts ................................10-15 1008.7 Precast Reinforced Concrete Arch Sections ................................................................10-15 1008.8 Precast Reinforced Concrete Round Sections .............................................................10-16 1008.9 Arch or Flat Slab Top Culvert Foundations ..................................................................10-17 1008.10 Bridge Foundations ....................................................................................................10-17 1008.11 Waterproofing Membrane...........................................................................................10-18 1008.12 Precast Reinforced Concrete Flat Slab Tops, Catch Basin Tops, and Inlet Tops......10-18 1008.13 Wingwall Design .........................................................................................................10-18 1009 Subsurface Pavement Drainage...................................................................................................10-18 1009.1 General.........................................................................................................................10-18 1010 Maintenance of Traffic Drainage ..................................................................................................10-18 1010.1 General.........................................................................................................................10-18 1011 Temporary Structures...................................................................................................................10-19
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