Then, insert the design era installation dvd in the dvdrom drive. Road authority, 2002 and is used for design of all structures that. September 2002 chapter 5 detention, retention and infiltration design 51. Stitch era older version users and new users of stitch era or hotfix era. Scope caters for paved before the implementation of road sector and unpaved roads carrying up to 300vpd. This collection of publications is the single official repository for official engineering regulations ers, engineering circulars ecs, engineering manuals ems and other official public documents originating from headquarters u. Computation of runoff rain water expelled from the road surface i. January 2021 roadway design bulletin 2021 drainage manual. The following design standards shall be applied to bridge design. Provision of best practice and case studies of drainage infrastructure internally within ethiopia and elsewhere in africa, caribbean and usuk.
Ahw allowable headwater elevation the allowable water surface elevation upstream from a culvert. Oct 03, 2003 this manual is intended to be used in conjunction with bs en 120563, but is not a replacement for it. These groups may wish to improve or change drainage patterns, redirect storm. Proposed revisions and additions to the existing era drainage design manual 2002 include. Effective with design approval on or after may 01, 2020. It should also be noted that in 2008, aashto released the mechanisticempirical pavement design guide. Drainage design manual 20 storm drainage facilities ethiopian roads authority page105 mutual economic benefit may exist. The manual complements and links to the ethiopian roads authority era design manuals for higher traffic roads and is accompanied by era documents dealing with technical specifications, drawings. Drainage facilities for most roadway projects account for approximately 25% of the total construction cost application design drainage facilities following the recommended design procedures noted in this manual to minimize the following. Bank protection erosion control this can be a major element in the design, construction and maintenance of highways.
The manual therefore describes the various stages in the design of a roof drainage system but it is necessary to refer to bs en 120563 for particular figures or items of information. Roadway design provides technical expertise to department and consultant designers. Design manual and users guide greenville countys calibrate. Ethiopian roads authority drainage design manual 1263 words 6 pages. Draft stormwater management manual for eastern washington. Chapter 1 manual introduction section 1 about this manual hydraulic design manual 14 txdot 11 2002 organization this manual is organized as follows. Designer guidelines for culvert repair and rehabilitation. The accompanying software, aashtoware pavement me design, was released in 2011. Volume 2 technical handbook georgia stormwater management manual 51 chapter 5 stormwater drainage system design table of contents section 5. Drainage services department dsd technical manuals. The contents relating to eurocodes are printed in green colour in the updated version. Summary in order to a establish a design rainfall and flow estimation methodology compatible to the ethiopian environment and facilitate standard design practices in all road design works in ethiopia, the ethiopian road authority era had commissioned louis berger group to prepare a road drainage design manual in 2002.
The standards set out shall be adhered to unless otherwise directed by era. Most of the flooding is in areas developed prior to the current understanding of flood potential and prior to regulations restricting construction in floodprone areas. However, i should emphasize that careful consideration to sound engineering practice shall be observed in the use of the manual, and under no circumstances shall the manual waive. Adaptable to roads administered by different levels era, regions, weredas spot improvement to total rural road design emphasis on complementary interventions 12112010 12. Road drainage manual the road drainage manual, rdm 3 rd edition, sets out a multidisciplinary approach to the provision of drainage infrastructure. Manual introduction overview of the material covered in this manual. Guideline for road drainage design free download as pdf file. The agency personnel involved in the preparation of this manual were mr. The design manual identifies a single set of standards, submittal requirements and approval procedures to be used in the planning and design of projects within the msd service area. Policy and guidelines considerations regarding highway drainage design for txdot. Backwater the increased depth of water upstream from a dam, culvert, or other drainage structure due to the existence of such obstruction.
This climate zoning is given in the drainage design manual era, ethiopian. Note the updated version incorporates updating for migration from british standards to eurocodes in respect of structural design. Title and subtitle urban drainage design manual hydraulic engineering circular 22, second edition 5. The geometric design manual, the site investigation manual and the environmental and social management manual were among the most relevant in. Preparation of a route selection manual for the ethiopian. Damage of private property due to flooding inconvenience to the motorist during moderate to heavy rainfall. This drainage designmanual20 is based on era s drainage design manual 2002 but includes improvements resulting from recent research and extensions to deal with topics that were not included in the earlier manual. Era formed a working group charged with evaluating and commenting upon the draft manual and guiding. Rainfall intensity runoff is obtained by considering expected sever storm.
The design manual is not intended to serve as a stepbystep design methodology nor can the design manual address every situation, which may arise. The road drainage design manual provides guidance in relation to the planning, design, construction, maintenance and operation of road drainage structures in all urban and rural environments for main roads, queensland. Bridge design manual original 12615 general incorporated standard specification guidance from gdot bridge and structures design manual into lrfd bridge manual to produce a consolidated manual section 1. Development of a national design manual, standard specifications and bidding documents for low volume roads in ethiopia. This manual supersedes the drainage design manual part of the era 2002 series of manuals. April 1982 design of castinplace and precast box conduits with new box loading diagrams. July 2017 vdot governance document drainage manual. The 2015 bridge design manual was developed to provide guidance to design engineers, technicians, and inspection personnel engaged in bridge design, plan preparation, construction, and inspection activities for the new hampshire department of transportation. Roadway design manual the roadway design manual rdm defines the departments requirements for roadway design. This manual focuses on site planning, source control, and stormwater treatment practices and is intended for use as a planning tool and design guidance document by the regulated and regulatory communities involved in stormwater quality management. All technical manuals harris county flood control district. If in doubt about soil suitability, seek advice from the regional road authority. If your computer does not have the autorun feature activated, the installation program must be manually.
Ethiopian roads authority drainage design manual a road drainage design manual in 2002 under a credit from the international development agency ida. Fort bend county interim atlas 14 drainage criteria manual and minimum slab elevation criteria. Local municipalities may also be aware of proposed private development in the vicinity of the road project which may impact drainage design. From the outset, the approach to the development of the manual. The 2002 version replaces the current manual which was developed in 1980. From the outset, the approach to the development of the manual was to include all sectors and stakeholders in ethiopia.
In 2010, adot contracted with applied research associates, inc. The vermont stormwater management manual volume ii technical guidance vermont agency of natural resources august 2002. The 2002 drainage manual has been revised based on the aashto model drainage manual and now is the official source for development and application of all drainage design related to vdot plans. Section 870 deals with procedures, methods, devices and materials commonly used to mitigate the damaging effects of flowing water on transportation facilities and adjacent properties. The geometric design manual, the site investigation manual and the environmental and social management manual were among the most relevant in this regard. The drainage design manual has been developed by the office of hydraulic engineering ohe. Harris county flood control districts activities have diversified since its creation in 1937. The installation program will be automatically executed. According to era drainage design manual 2002 a check dam, which is a low dam or. In 2002, the ethiopian roads authority era first brought out road design manuals to provide a standardized. Structural design of storm drain, computer application manual. This standard technical specification2002 is one of the series of. Most routes can be built to engineered natural surface ens earth road standard for most of their length.
This is to ensure that potholes do not develop by rapidly removing surface water and to ensure that excessive crossfall does not cause erosion of the surface. Detention, retention an52 d infiltration design september 2002 for their specific project. The comments and suggestions received from the workshop. Storm drainage design guideline for site characterization564. Drainage design page 4 aws allowable water surface elevations the water surface elevation above which damage will occur. The hydrologic techniques in this manual apply to the design of local storm drains, retention and detention basins. November 14, 2002 the project scope of work the project scope is to modify existing methods used for detention calculations and generate a new calibrated storm water design procedure for greenville county. Indiana department of transportation 20 design manual chapter 203 hydraulics and drainage design. Errors or omissions should be reported to the administrator, office of hydraulic engineering, ohio department of transportation, 1980 w. Location and design division issued april 2002 rev.
Bridge design manual bridge design nh department of. This is to ensure that potholes do not develop by rapidly removing surface water and to ensure that excessive crossfall does not. It encourages uniform application of design methodology and criteria, as well as standard details in plan preparation for bridges and. Ethiopian roads authority drainage design manual 123 help me. Design manual part 2 highway design may 2020 change no. From tree planting and environmental programs to voluntary home buyouts and more, these additional programs help the flood control district fully meet its mission. A major flood occurs somewhere in harris county about every two years. The standards set forth in this manual govern all hydrology calculations done under public works jurisdiction. Drainage criteria manual revised 2011 download print. Other documents such as the era lvr design manual 2011 describe how such improvements can be designed and constructed. This drainage design manual 20 is based on eras drainage design manual 2002 but includes improvements resulting from recent research and extensions to deal with topics that were not included in the earlier manual.
Landfill site design published by the environmental protection agency, ireland. Specific opportunities sought for efficiency obtained from experience and research executed on low. Design considerations for conveyance systems are not included in the stormwater manual, as this topic is adequately covered in standard engineering references. It is a guide to those involved in the planning, design, operation and maintenance of road drainage infrastructure for small, simple rural and urban catchments. Return period of 5 10 20 25 50 and 100 return period of 5, 10, 20, 25, 50, and 100. The county is divided into five principal drainage systems. Storm drainage design is an integral component in the design of road and transportation networks. Stitch era v17 user manual sierra technology group. Effective april 5, 2012, stormwater program advisory swpa 1201 states that evaluation of. In order to accomplish this work, this design manual and users guide includes the following components.
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