FLH PDDM Chapter 9 - Eastern Federal Lands Highway Division

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9.4.D. Earth Retaining Structures. (continued)List of owner agencies using the system, including contact names, addresses, and phone numbers. The listshall include documentation that the system has a successful "track record" of several installations. Theactual number of successful installations required will depend on the FLH reviewers' concerns, butnormally will be between 2 and 10 installations.Details of wall elements, analysis of structural elements, design calculations, factors of safety, estimatedlife, corrosion design procedure for soil reinforcing elements, procedure for field and laboratory evaluationincluding instrumentation, and special requirements, if any.Sample material and construction control specifications showing materials type, quality, certifications, fieldtesting, acceptance and rejection criteria, and placement procedures.A well documented field construction manual describing in detail, with illustrations where necessary, thestep by step construction sequence.Typical unit costs supported by data from several actual projects.A certification of the product and procedure by an independent Professional Engineer.Types of architectural facing treatments available or possible.Normally the Division Geotechnical Engineers will be responsible for coordinating the review. The principlereviewer shall determine if the system warrants further review. The reviewer shall insure all informationneeded from the above list has been provided.The principle reviewer shall determine if additional reviews by Geotechnical Engineers, Bridge Engineers, andother technical expert within FLH, the FHWA, or outside consultant firms are needed.Much of the information requested from the suppliers is needed to determine the acceptance of the designprocedure. However, some of the data is to permit the reviewers to develop additional information fordesigners and Project Managers:ConstructabilityVersatility/suitability for varying site conditionsSuitability for Architectural FacingLimitations on usage (Maximum Fill Heights, etc.)The principle reviewer shall send copies of the review package they determine to be acceptable to FLHO andthe other FLH divisions for concurrence. All retaining wall systems considered for use on FLH projects shallbe included in the Guidelines for Design of Retaining Wall Systems. A new retaining wall system shall notbe added to the list until all design guidelines, wall system limitations, and materials and constructionspecifications have been developed and approved for inclusion.9 - 88
9.4.E. Drainage Design.E. Drainage Design. Drainage facilities convey both normal surface and subsurface waters (and withinreasonable limits, expected flood and storm waters) across along, or away from a highway. The designerconsiders the most cost efficient and practical manner to do this without undue damage to the highway, thedrainage facility, or adjacent stream channels and property. Various types of drainage methods will accomplishthis, including the use of open channels, riprap and channel lining, bridges, culverts, storm drains, underdrains,and related appurtenances. Some installations require provisions for fish passage.Chapter 7, Hydrology/Hydraulics, contains information, references and methods for designing drainagefacilities.The designer shall include all of the drainage facilities in the contract plans and make certain the specificationscontain provisions for these facilities.The designer is responsible for the design of drainage facilities and for submitting requests and data to thehydraulics engineer, the bridge unit, and the geotechnical unit. The designer normally designs all minordrainage structures and appurtenances, such as small culverts (1200 millimeters and smaller), end sections,catch basins, and inlets as well as minor drainage channels and ditches.Large culverts and channels are usually sized by the hydraulic engineer or by the designer with the assistanceof the hydraulic engineer.Bridge design (layout, minimum opening under bridge, pier placement, etc.) is the co-responsibility of thebridge unit and the hydraulics engineer.The geotechnical unit is responsible for specialized design of underdrains, horizontal drains, drainage blankets,and subdrainage systems using geotextile fabrics. They are also responsible for obtaining pH values of soilsand waters and for determining foundation materials for bridges and large culvert installations.Refer to Chapter 7, Section 7.1 to determine responsibilities of drainage design.The designer shall furnish lines, grades, cross sections, detail maps, and vicinity maps to the hydraulicsengineer and the bridge and geotechnical unit for design.The designer often adjusts grades (and lines) to provide adequate cover for culverts, minimum clearance underbridges, or for other constraints imposed by drainage facility designs performed by others.Early in the design process, the designer should consult with the hydraulics engineer, the bridge unit, and thegeotechnical unit where any special needs are foreseen. Also, early in the design process, the designer shoulddiscuss the need for various Federal, State, and local permits and approvals with the hydraulics engineer.The designer must review the environmental documents and correspondence with fish and wildlife agenciesand review all permits to ensure that all drainage requirements are in the contract.The hydraulics engineer or the bridge unit designs the larger and more complicated drainage facilities.However, the designer must have familiarity with the design principles and methods to supply adequateinformation so others can design these facilities. The designer should know the minimum vertical dimensionsof structures to adjust the highway grade, and should be aware of alternative designs that could affect the lineand grade of a highway.9 - 89
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TABLE OF CONTENTS9.4 PS&E DEVELOPME
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TABLE OF CONTENTS9.4 PS&E DEVELOPME
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LIST OF TABLESTablesPage9-1 Design
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9.1.B. Design Standards.B. Design S
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9.1.B. Design Standards. (continued
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9.1.B. Design Standards. (continued
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9.2 GUIDANCE AND REFERENCESThe publ
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9.3 INFORMATION GATHERINGThe design
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9.3.C. Accident Data.C. Accident Da
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9.4.A. Geometric Design. (continued
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Page 44: 9.4.A. Geometric Design. (continued
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Page 65 and 66: 9.4.B. Intersection Design. (contin
Page 77 and 78: 9.4.C. Earthwork Design.C. Earthwor
Page 79 and 80: 9.4.C. Earthwork Design. (continued
Page 85 and 86: 9.4.D. Earth Retaining Structures.
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Page 97 and 98: 9.4.E. Drainage Design. (continued)
Page 99 and 100: 9.4.F. Other Design Elements.F. Oth
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Page 111 and 112: 9.4.G. Right-of-Way and Utilities.G
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Page 133 and 134: 9.4.H. Reviews.H. Reviews. PS&E dev
Page 135 and 136: 9.4.I. Plans.I. Plans. Plans consis
Page 137 and 138: 9.4.J. Engineer's Estimate.J. Engin
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9.4.J. Engineer’s Estimate. (cont
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9.4.K. Specifications.K. Specificat
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9.4.K. Specifications. (continued)2
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9.4.K. Specifications. (continued)W
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9.4.K. Specifications. (continued)I
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9.4.L. Contract Assembly.L. Contrac
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9.6 STANDARD FORMATA. Plans. Projec
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9.6. Standard Format. (continued)Ta
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9.6. Standard Format. (continued)A
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9.6. Standard Format. (continued)Ex
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9.6. Standard Format. (continued)Sh
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9.6. Standard Format. (continued)(1
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Project Number:Project Name:Descrip
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EXHIBIT 9.38APPROVED STANDARD DRAWI
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EXHIBIT 9.38APPROVED STANDARD DRAWI
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FLH PDDM Chapter 9 - Eastern Federal Lands Highway Division

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