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  • UNET Documentation

    To download the following technical documents, check the box of the desired documents below and then click the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat 4.0 PDF format.

    Download UNET Version 4.0 User's Manual (PDF File)
    File Size: 3911023 bytes
    File Date: Fri Sep 22 09:14:37 2006

    This reference manual provides the complete technical reference documentation for UNET Version 4.0.

    Download UNET Version 3.0 User's Manual (PDF File)
    File Size: 27575336 bytes
    File Date: Fri Sep 22 09:22:15 2006

    This reference manual provides the complete technical reference documentation for UNET.
  • FEMA Technical Documentation

    To download the following FEMA technical documents, check the box of the desired documents and then click the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat PDF version 4.0 format.

    Download FEMA Flood Insurance Study Guidelines and Specifications (PDF File)
    File Size: 513134 bytes
    File Date: Tue Mar 14 03:40:59 2006

    The Federal Emergency Management Agency (FEMA) has compiled the Flood Insurance Study Guidelines and Specifications for Study Contractors to define technical policy and procedures to be followed in the preparation of FIS, restudies, and LMMP projects. Adherence to these guidelines is required in the Contract Statement of Work. Performance in accordance with these guidelines is required of any contractor preparing a FIS, restudy, or revision unless otherwise specified in the contract.

    Download FEMA Q3 Flood Data User Guide (PDF File)
    File Size: 295927 bytes
    File Date: Fri Sep 22 09:08:47 2006

    This document is intended to provide the user of Q3 Flood Data produced by the Federal Emergency Management Agency (FEMA) with an overview of the data files. Additional information in greater depth may be found in the Q3 Flood Data Specifications document.

    Download FEMA Q3 Flood Data Specifications (PDF File)
    File Size: 319975 bytes
    File Date: Fri Sep 22 09:08:41 2006

    This document is intended to provide the user of Q3 Flood Data with detailed information regarding the contents of the Q3 Flood Data files. An overview of the Q3 Flood Data product maybe found in the Q3 Flood Data User Guide.

    Download FEMA Q3 Flood Data Specifications, draft document, March 1996 (PDF File)
    File Size: 533612 bytes
    File Date: Tue Mar 14 03:48:44 2006

    This document is intended to provide the user of Q3 Flood Data with detailed information regarding the contents of the Q3 Flood Data files. Q3 Flood Data are developed by scanning the existing hardcopy FIRM to create a raster product suitable for viewing or printing and vectorizing a thematic overlay of flood risks. Vector Q3 Flood Data files contain only certain features from the existing hardcopy FIRM.
  • Manning's N Roughness Coefficient Technical Documentation

    To download the following technical documents, check the box of the desired documents below and then click the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat 4.0 PDF format.

    Download Manning's Roughness Coefficient Guide #1 (PDF File)
    File Size: 3593796 bytes
    File Date: Fri Sep 22 06:36:11 2006

    This PDF file contains documentation on how to select Manning's Roughness Coefficient. Most hydraulic computations related to indirect estimates of discharge require an evaluation of the roughness characteristics of the channel. This document contains photographs and data for a wide range of channel conditions that can be used to select roughness coefficients for other natural channels.

    Download Manning's Roughness Coefficient Guide #2 (PDF File)
    File Size: 5283414 bytes
    File Date: Fri Sep 22 09:08:34 2006

    Most hydraulic computations related to indirect estimates of discharge require an evaluation of the roughness characteristics of the channel. This document contains photographs and data for a wide range of channel conditions that can be used to select roughness coefficients for other natural channels.

    Download Manning's Roughness Coefficient Guide #3 (PDF File)
    File Size: 6551792 bytes
    File Date: Wed Jul 18 09:28:04 2007

    This PDF file contains documentation on how to select Manning's Roughness Coefficient. This document contains photographs and data for a wide range of channel conditions that can be used to select roughness coefficients for other natural channels.
  • Hydraulic Design Series (HDS)

    To download the following technical documents, check the box of the desired documents below and then click the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat 4.0 PDF format.

    Download HDS 1 Documentation (PDF file)
    File Size: 4853209 bytes
    File Date: Thu Jul 24 09:18:52 2008

    This is the HDS 1 document entitled "Hydraulics of Bridge Waterways", March 1978, FHWA EPD-86-101. This document intends to provide a means of determining the effect of a given bridge upon the flow of a stream.

    Download HDS 2 Documentation (PDF file)
    File Size: 9424323 bytes
    File Date: Thu Jul 24 09:21:19 2008

    This is the HDS 2 document entitled "Highway Hydrology", September 1996, Metric version, FHWA SA-96-067. The purpose of this manual is to present some of the principles and techniques of using modern hydrology to obtain functionally acceptable solutions that can form the basis for the design of highway drainage structures.

    Download HDS 2 Documentation (PDF file)
    File Size: 2475792 bytes
    File Date: Fri Sep 22 05:21:43 2006

    This is the HDS 2 document entitled "Peak Rates of Runoff from Small Watersheds", April 1961. This publication reports a research study of peak rates of runoff from small watersheds, and the practical application of the results of that research.

    Download HDS 3 Documentation (PDF file)
    File Size: 11068116 bytes
    File Date: Thu Jul 24 09:21:13 2008

    This is the HDS 3 document entitled "Design Charts for Open-Channel Flow", August 1961, FHWA EPD-86-102. This document contains charts which provide direct solution of the Manning equation for uniform flow in open prismatic channels of various cross sections, instructions for using the charts, a table of recommended values of n in the Manning equation, tables of permissible velocities in earth and vegetated channels, instructions for constructing charts similar to those presented, and a nomograph for use in the solution of the Manning equation.

    Download HDS 4 Documentation (PDF File)
    File Size: 2521447 bytes
    File Date: Fri Sep 22 05:23:27 2006

    This is the HDS 4 document entitled "Design of Roadside Channels", May 1965, FHWA EPD-86-102. Roadside drainage channels perform the vital function of diverting or removing surface water from the highway right-of-way. They should provide the most efficient disposal system consistent with cost, importance of the road, economy of maintenance, and legal requirements. One standard channel win rarely provide the most satisfactory drainage for all sections of a highway, although it might be adequate for most locations. Thus, the design engineer needs procedures for designing various types of channels. This publication discusses flow in roadside drainage channels, estimation of peak discharges from small areas, prevention of channel erosion, and presents methods for the design of drainage channels required to remove runoff from the area immediately adjacent to the highway.

    Download HDS 4 Documentation (PDF File)
    File Size: 4746760 bytes
    File Date: Fri Sep 22 05:27:02 2006

    This is the HDS 4 document entitled "Introduction to Highway Hydraulics", June 1997, Metric Version, HI-97-028. This publication is an update of the 1965 document "Design of Roadside Drainage Channels" that includes discussion of closed conduit facilities and energy dissipators as well as open channel hydraulics.

    Download HDS 4 Documentation (PDF File)
    File Size: 4734409 bytes
    File Date: Fri Sep 22 04:59:15 2006

    This is the HDS 4 document entitled "Introduction to Highway Hydraulics", August 2001, FHWA NHI-01-019. This publication is an update of the 1997 edition and now includes dual units (SI and English).

    Download HDS 5 Documentation (PDF File)
    File Size: 5533871 bytes
    File Date: Tue Mar 14 03:42:38 2006

    This HDS 5 document, "Hydraulic Design of Highway Culverts", September 1985, FHWA IP-85-15, provides comprehensive culvert design material. Culvert design methods are presented for both conventional culverts and culverts with inlet improvements. Storage routing techniques are included which permit the designer to account for ponding effects upstream of the culvert. Unique culvert applications, erosion and sediment control, debris control, structural aspects, and long span culverts are discussed. Inlet control, outlet control, and critical depth design charts, are included for a variety of culvert sizes, and shapes, and materials. Dimensionless culvert design charts are also provided for the design of culverts.

    Download HDS 5 Documentation (PDF File)
    File Size: 13098491 bytes
    File Date: Fri Sep 22 05:35:58 2006

    This is the HDS 5 document, "Hydraulic Design of Highway Culverts", 2000, FHWA IF-00-22.

    Download HDS 5 Documentation (PDF File)
    File Size: 13193641 bytes
    File Date: Fri Sep 22 05:08:30 2006

    This is the HDS 5 document, "Hydraulic Design of Highway Culverts, Second Edition", FHWA NHI-01-020. The second edition corrects minor errors and provides both SI and English units for all equations and design charts.

    Download HDS 6 Documentation (PDF File)

    This HDS 6 document, "River Engineering for Highway Encroachments", December 2001, FHWA NHI-01-004, has proven to be a singularly authoritative document for the design of highway associated hydraulic structures in moveable boundary waterways. The major topics are: sediment transport, natural and human induced causes of waterway response, stream stabilization (bed and banks), hydraulic modeling and computer applications, and countermeasures. Case histories of typical human and natural impacts on waterways are analyzed.
  • Hydraulic Engineering Circulars (HEC)

    To download the following technical documents, check the box of the desired documents below and then click the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat 4.0 PDF format.

    Download HEC 1 Documentation (PDF File)
    File Size: 226880 bytes
    File Date: Fri Sep 22 05:36:09 2006

    This HEC 1 document, "Selected Bibliography of Hydraulic and Hydraulic Subjects", FHWA EPD-86-104 is a bibliography compiled to assist highway engineers in securing current and authoritative publications on hydraulic and hydrologic subjects.

    Download HEC-2 Island Split Flow Example (PDF File)
    File Size: 148187 bytes
    File Date: Fri Sep 22 09:11:32 2006

    There are many types of split flow situations that can occur in a river. The following is a list of the more commonly encountered split flow situations:

    1. Split flows caused by islands or high ground dividing the flow.


    2. Split flows caused by levee overtopping.


    3. Split flows caused by watershed divide overtopping.


    4. Split flows caused by diversion structures.

    The HEC-2 split flow option is capable of analyzing all of the above split flow situations except for bifurcation of flow at islands or high ground. In addition, HEC-RAS cannot model any of the above split flow situations.

    This document describes how to model the bifurcation of flow at an island using HEC-2 (or HEC-RAS) and a graphical interpolation method. This interpolation method can be used whenever flow is separated into two or more channels. For example, this method can be used to model divided flow when there are multiple bridge openings at a roadway crossing (when the conveyance is separated among the bridge openings).

    Download HEC 5 Documentation (PDF File)
    File Size: 4823296 bytes
    File Date: Fri Sep 22 05:39:31 2006

    This is the HEC 5 document, "Hydraulic Charts for the Selection of Highway Culverts", FHWA EPD-86-105. Designing highway culverts involves many factors including estimating flood peaks, hydraulic performance, structural adequacy, and overall construction and maintenance costs. This circular contains a brief discussion of the hydraulics of conventional culverts and charts for selecting a culvert size for a given set of conditions, as well as instructions for using the charts.

    Download HEC-6 User Manual (PDF File)
    File Size: 2543253 bytes
    File Date: Fri Sep 22 09:07:01 2006

    This document contains the complete HEC-6 documentation. HEC-6 is a one-dimensional sediment transport model, and can calculate water surface and sediment bed surface profiles in the stream bed and the flowing water-sediment mixture.

    Download Guidelines for the Calibration and Application of HEC-6, Technical Document TD-13 (PDF File)
    File Size: 1349943 bytes
    File Date: Fri Sep 22 09:11:55 2006

    This document contains the guidelines for the calibration and application of HEC-6. This is a supplement to the HEC-6 User Manual. This document has substantial new material since the publication of the HEC-6 User Manual.

    Download HEC 9 Documentation (PDF File)
    File Size: 2141331 bytes
    File Date: Fri Sep 22 05:40:59 2006

    This PDF technical document, "Debris Control Structures", FHWA EPD-86-106, discusses water-borne debris problems and structures used for controlling debris. An accumulation of debris at inlets of highway drainage structures is a frequent cause of unsatisfactory performance or malfunction. This accumulation may result in failure of the drainage structure, or overtopping of the roadway by flood water, or possible damage to the roadway and other property. Consideration of the need for debris-control structures should be an essential part of all hydraulic structure designs. This PDF technical document emphasizes on culverts because their relatively limited waterway area is subject to clogging by retention of debris at the inlet.

    In this PDF technical document a system of classifying the type of debris expected from any drainage basin is followed by a list of types of debris-control structures. The basis for choosing the type of control structure is given and details of design are discussed.

    Download HEC 10 Documentation (PDF File)
    File Size: 3510314 bytes
    File Date: Fri Sep 22 05:43:22 2006

    This is the HEC 10 document "Capacity Charts for the Hydraulic Design of Highway Culverts", FHWA EPD-86-105, November 1972. Since hydraulic capacity is one of the most important factors in the design of a highway culvert, simple methods for making this determination are needed. This circular contains a series of hydraulic capacity charts which permit the direct selection of a culvert size for a particular site without making detailed computations.

    Download HEC 11 Documentation (PDF file)
    File Size: 3713101 bytes
    File Date: Thu Jul 24 09:19:03 2008

    This is the HEC 11 document entitled "Design of Riprap Revetment", Metric Version, FHWA IF-00-022. It includes discussions on recognizing erosion potential, erosion mechanisms, riprap failure modes and riprap types. Design concepts included are: design discharge, flow types, channel geometry, flow resistance, extent of protection, and toe depth. Detailed design guidelines are presented for rock riprap, and design procedures are summarized in charts and examples. Design guidance is also presented for wire-enclosed rock, precast concrete blocks, and concrete paved linings.

    Download HEC 11 Documentation (PDF file)
    File Size: 13537313 bytes
    File Date: Thu Jul 24 09:18:46 2008

    This is the HEC 11 document entitled "Design of Riprap Revetment", March 1989, FHWA IP-89-016.

    Download HEC 12 Documentation (PDF file)
    File Size: 5058591 bytes
    File Date: Fri Sep 22 05:46:45 2006

    This is the HEC 12 document entitled "Drainage of Highway Pavements", FHWA TS-84-202, March 1984. This circular considers the removal of storm water from highway pavement surfaces and median areas. It discusses roadway geometry as it affects pavement drainage, estimation of storm water runoff for inlet design, and flow in curbed gutter sections. It also includes a discussion of types of inlets, factors affecting inlet interception capacity, inlet interception capacity comparisons and design charts. It also discusses median, embankment and bridge inlets, procedures for developing design charts for parabolic roadway sections and for standard inlet configurations and cross slopes.

    Download HEC 13 Documentation (PDF file)
    File Size: 3395858 bytes
    File Date: Fri Sep 22 05:49:04 2006

    This is the HEC 13 document entitled "Hydraulic Design of Improved Inlets for Culverts", FHWA EPD-86-109, August 1972. This document gives a short review of conventional culvert hydraulics, discusses types of improved inlets, and presents design procedures for box and pipe culverts with improved entrances.

    Download HEC 14 Documentation (PDF file)
    File Size: 6719618 bytes
    File Date: Thu Jul 24 09:19:11 2008

    This is the HEC 14 document entitled "Hydraulic Design of Energy Dissipators for Culverts and Channels", September 1983, Metric Version. It provides design information for analyzing dissipation problems at culvert outlets and in open channels. Design chapters cover the general types of dissipaters: hydraulic Jump, forced hydraulic jump, impact, drop structure, and riprap.

    Download HEC 14 Documentation (PDF file)
    File Size: 25954465 bytes
    File Date: Thu Jul 24 09:19:35 2008

    This is the HEC 14 document entitled "Hydraulic Design of Energy Dissipators for Culverts and Channels", September 1983, FHWA EPD-86-110.

    Download HEC 15 Documentation (PDF file)
    File Size: 2933014 bytes
    File Date: Thu Jul 24 09:18:48 2008

    This is the HEC 15 document entitled "Design of Roadside Channels with Flexible Linings", April 1988, Metric Version. It provides design procedures for several types of flexible linings. Special design procedures are presented for composite channels and channels with steep gradients. The design procedures are based on the concept of maximum permissible tractive force. Methods for determination of hydraulic resistance and permissible shear stress for individual linings are presented. Nomographs are provided for solution of uniform flow conditions in trapezoidal channels and determination of resistance characteristics for vegetation and permissible shear stress for soils.

    Download HEC 15 Documentation (PDF file)
    File Size: 8403407 bytes
    File Date: Thu Jul 24 09:18:58 2008

    This is the HEC 15 document entitled "Design of Roadside Channels with Flexible Linings", April 1988, FHWA IP-87-7.

    Download HEC 16 Documentation (PDF file)
    File Size: 1160415 bytes
    File Date: Fri Sep 22 05:49:52 2006

    This is the HEC 16 document entitled "Addendum to Highways in the River Environment/Hydraulic and Environmental Design Considerations", FHWA EPD-86-116, July 1980.

    Download HEC 17 Documentation (PDF file)
    File Size: 3702281 bytes
    File Date: Thu Jul 24 09:19:06 2008

    This is the HEC 17 document entitled "The Design of Encroachments on Flood Plains using Risk Analysis", April 1981, FHWA EPD-86-112. The purpose of this manual is to provide guidance in the application of the least total expected cost (LTEC) design decision-making process in the design of flood plain encroachments.

    Download HEC 18 Document (PDF File)
    File Size: 26788280 bytes
    File Date: Fri Sep 22 08:30:50 2006

    This HEC 18 document is entitled "Evaluating Scour at Bridges", FHWA NHI 01-001, May 2001, Fourth Edition. This document is provided by the Federal Highway Administration (FHWA) to provide guidance in:

    1. Designing new and replacement bridges to resist scour.


    2. Evaluating existing bridges for vulnerability to scour.


    3. Inspecting bridges for scour.


    4. Providing scour counter-measures.


    5. Improving the state-of-practice of estimating scour at bridges.

    Download HEC 18 Document (PDF File)
    File Size: 3802055 bytes
    File Date: Fri Sep 22 08:31:53 2006

    This HEC 18 document is "Evaluating Scour at Bridges", FHWA IP-90-017, November 1995, Third Edition, Metric Version.

    Download HEC 18 Document (PDF File)
    File Size: 5190334 bytes
    File Date: Fri Sep 22 08:23:26 2006

    This HEC 18 document is "Evaluating Scour at Bridges", FHWA IP-90-017, November 1995, Third Edition.

    Download HEC 18 Document (PDF File)
    File Size: 5231735 bytes
    File Date: Fri Sep 22 05:53:30 2006

    This is the HEC 18 document, "Evaluating Scour at Bridges", FHWA IP-90-017, February 1993.

    Download HEC 19 Document (PDF File)
    File Size: 7731779 bytes
    File Date: Fri Sep 22 05:59:00 2006

    This HEC 19 document is entitled "Hydrology", FHWA IP-84-15, October 1984. By application of the principles and methods of modern hydrology, it is possible to obtain solutions which are functionally acceptable and form the basis for the design of highway drainage structures. This manual presents some of these principles and techniques and explains their uses by illustrative examples. It also discusses basic hydrologic concepts and hydrologic analysis as it relates to the highway stream crossing problem.

    Download HEC 20 Documentation (PDF File)
    File Size: 42831075 bytes
    File Date: Fri Sep 22 08:44:30 2006

    This is the HEC 20 document entitled "Stream Stability at Highway Structures", Third Edition, FHWA NHI 01-002. This document provides guidelines for identifying stream instability problems at highway-stream crossings and for the selection and design of appropriate countermeasures to mitigate potential flood damages to bridges and other highway components at stream crossings.

    Download HEC 20 Documentation (PDF File)
    File Size: 3267610 bytes
    File Date: Fri Sep 22 06:03:32 2006

    This is the HEC 20 document entitled "Stream Stability at Highway Structures", Second Edition, FHWA HI-96-032, November 1995.

    Download HEC 20 Documentation (PDF File)
    File Size: 2996626 bytes
    File Date: Fri Sep 22 06:01:12 2006

    This is the HEC 20 document entitled "Stream Stability at Highway Structures", FHWA IP-90-014, February 1991.

    Download HEC 21 Documentation (PDF File)
    File Size: 2303211 bytes
    File Date: Thu Jul 24 09:19:00 2008

    This is the HEC 21 document entitled "Bridge Deck Drainage Systems", May 1993, FHWA SA-92-010. The objective of this manual is to support sound, economic, and low maintenance design for bridge deck and bridge end drainage facilities. The manual provides guidelines and procedures for designing bridge deck drainage systems, accompanied with illustrative and practical examples.

    Download HEC 22 Document (PDF File)
    File Size: 5868533 bytes
    File Date: Fri Sep 22 05:12:30 2006

    This is the HEC 22 manual entitled, "Urban Drainage Design Manual", FHWA NHI-01-021, August 2001. It provides a comprehensive and practical guide for the design of storm drainage systems associated with transportation facilities. Design guidance is provided for the design of storm drainage systems which collect, convey, and discharge stormwater flowing within and along the highway right-or-way. Methods and procedures are given for the hydraulic design of storm drainage systems. Design methods are presented for evaluating rainfall and runoff magnitude, pavement drainage, gutter flow, inlet design, median and roadside ditch flow, structure design, and storm drain piping. Procedures for the design of retention facilities and stormwater pump stations are also presented, along with a review of urban water quality practices. A summary of related public domain computer programs is also provided.

    Download HEC 22 Document (PDF File)
    File Size: 9079219 bytes
    File Date: Fri Sep 22 06:10:01 2006

    This is the HEC 22 manual entitled, "Urban Drainage Design Manual", FHWA SA-96-078, November 1996, Metric Version.

    Download HEC 22 Document (PDF File)
    File Size: 10653450 bytes
    File Date: Tue Mar 14 03:46:44 2006

    This is the HEC 22 manual entitled, "Urban Drainage Design Manual", FHWA SA-96-078, November 1996.

    Download HEC 23 Documentation (PDF File)
    File Size: 71356307 bytes
    File Date: Fri Sep 22 09:05:50 2006

    This is the HEC 23 document entitled "Bridge Scour and Stream Instability Counter-measures Experience, Selection, and Design Guidance", Second Edition, FHWA NHI 01-003, March 2001. This document identifies bridge scour and stream instability countermeasures that have been instrumented by various SHAs to protect bridges in the United States. It develops a matrix which summarizes countermeasure application and use through the United States and provides design guidelines for several countermeasures which have been applied successfully on a state or regional basis, but for which only limited design references are available.

    Download HEC 23 Documentation (PDF File)
    File Size: 2946998 bytes
    File Date: Fri Sep 22 06:12:07 2006

    This is the HEC 23 document entitled "Bridge Scour and Stream Instability Counter-measures", FHWA HI-97-030, July 1997.
  • Hydraulic Reports

    To download the following technical documents, check the box of the desired documents below and then click the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat 4.0 PDF format.

    Download Highways in the River Environment (PDF File)
    File Size: 14353014 bytes
    File Date: Fri Sep 22 06:22:53 2006

    In the United States, the average annual damage related to hydraulic problems at highway facilities on the Federal-aid system is $40 million. Damages by streams can be reduced significantly by considering channel stability. The types of river changes to be carefully considered relate to:

    1. lateral bank erosion
    2. degradation and aggradation of the streambed that continues over a period of years, and
    3. natural short-term fluctuations of streambed elevation that are usually associated with the passage of floods

    This PDF Technical Document will cover many issues on highways in the river environment including: sediment transport, natural manmade causes of waterway responses, stream stabilization (bed and banks), computer applications, and countermeasures. Case histories of typical manmade and natural impacts on waterways are analyzed.

    Download Geosynthetic Design and Construction Guidelines (PDF File)
    File Size: 62104071 bytes
    File Date: Thu Jul 24 09:20:46 2008

    This is the document entitled "Geosynthetic Design and Construction Guidelines", FHWA HI-95-038. This manual was prepared to enable the Highway Engineer to correctly identify and evaluate potential applications of geosynthetics as an alternative to other construction methods and as a means to solve construction problems. With the aid of this text, the Highway Engineer should be able to properly design, select, test, specify, and construct with geotextiles, geocomposite drains, geogrids, and related materials in drainage, sediment control, erosion control, roadway, and embankment on soft soils applications.

    Download Bridge Inspection Document (PDF File)
    File Size: 11143471 bytes
    File Date: Fri Aug 18 23:45:51 2006

    This is the document entitled "Underwater Inspection of Bridges", November 1989, FHWA DP-80-1. The purpose of the manual is to provide guidelines for underwater bridge inspection, acquaint those responsible for bridge safety with underwater inspection techniques, and briefly present methods of repair for commonly found defects.

    Download Bridge Components Evaluation and Repair Document (PDF File)
    File Size: 28186732 bytes
    File Date: Thu Jul 24 09:20:03 2008

    This is the document entitled "Underwater Evaluation and Repair of Bridge Components", FHWA DP-98-1. This document describes a training course covering the topics of the status of bridge inspection programs, mechanisms of underwater deterioration, underwater condition surveys, underwater testing equipment, evaluation of deterioration on structures, and underwater repairs.

    Download Erosion and Sediment Control Document (PDF File)
    File Size: 18270298 bytes
    File Date: Fri Aug 18 23:08:52 2006

    This is the document entitled "Best Management Practices for Erosion and Sediment Control", FHWA FLP-94-005. The purpose of this manual is to provide guidance in preventing erosion and controlling sediment on highway construction projects. It addresses the selection of erosion and sediment control measures and the development of erosion control plans. Construction and inspection of the measures are presented for each practice.

    Download Pumping Station Manual (PDF File)
    File Size: 15073941 bytes
    File Date: Fri Sep 22 06:33:38 2006

    This manual is entitled "Manual for Highway Storm Water Pumping Stations", FHWA IP-82-17, Volumes 1 and 2, October 1982. This manual provides guidelines, criteria and specifications for highway storm water pumping stations. It includes discussion of pumps, motors, engines, electrical systems and construction.

    Download Culvert Inspection Manual (PDF File)
    File Size: 22110421 bytes
    File Date: Thu Jul 24 09:21:05 2008

    This is the document entitled "Culvert Inspection Manual", FHWA IP-86-2. The manual provides procedures for conducting and documenting culvert inspections with specific guidelines for inspecting and evaluating the major hydraulic and structural components of culverts. It also includes discussions on the hydraulic, structural, and durability performance of culverts and information on personnel qualifications, equipment, and safety procedures for conducting culvert inspections.

    Download Inlet and Culvert Structural Design Manual (PDF File)
    File Size: 9866751 bytes
    File Date: Thu Jul 24 09:19:43 2008

    This is the document entitled "Structural Design Manual for Improved Inlets and Culverts", FHWA IP-83-6. This manual provides structural design methods for inlets having specific configurations that improve hydraulic flow in channels. Design methods and typical details for the component structures found in improved inlets, such as wing walls, headwalls, aprons, and the inlet itself, are also presented in this manual.

    Download Bridge Hydraulic Problem Countermeasures Manual (PDF File)
    File Size: 25310248 bytes
    File Date: Thu Jul 24 09:21:46 2008

    This is the document entitled "Countermeasures for Hydraulic Problems at Bridges. Vol I Analysis and Assessment", FHWA RD-78-162. This document contains a survey of stream hazards to bridges, provides a statistical analysis of frequency of problems, and rates the performance of rigid and flexible revetments, and flow control measures. It also evaluates measures incorporated into the design of the bridge.

    Download Bridge Hydraulic Problem Countermeasures Manual (PDF File)
    File Size: 87769765 bytes
    File Date: Fri Aug 18 23:33:26 2006

    This is the document entitled "Countermeasures for Hydraulic Problems at Bridges. Vol II Case Histories for Sites 1-283", FHWA RD-78-163. This document is a collection of detailed case histories.

    Download Culvert Repair Practices Manual (PDF File)
    File Size: 35122860 bytes
    File Date: Thu Mar 20 13:01:40 2003

    This is the document entitled "Culvert Repair Practices Manual Volume I", FHWA RD-94-096. This manual provides information, guidelines, and alternatives for the cost-effective repair of culverts. It provides an overview of current practices for maintenance, repair, rehabilitation, retrofit upgrading, and replacement of highway culverts. It gives detailed information on appropriate related procedures. It supplies guidelines for selecting the most cost-effective procedures for resolving current problems to provide increased serviceability and life expectancy of culverts.

    Download Culvert Repair Practices Manual (PDF File)
    File Size: 14022936 bytes
    File Date: Thu Jul 24 09:21:30 2008

    This is the document entitled "Culvert Repair Practices Manual Volume II", FHWA RD-95-089. This document contains the appendixes of the Culvert Repair Practices Manual.

    Download Hydraulic Flow Resistance Factors Document (PDF File)
    File Size: 5985440 bytes
    File Date: Thu Jul 24 09:19:15 2008

    This is the document entitled "Hydraulic Flow Resistance Factors for Corrugated Metal Conduits", FHWA TS-80-216. This document presents methods which allow a corrugated metal conduit designer to estimate resistance factors for all available corrugation shapes and methods of manufacture.

    Download Box Culvert Document (PDF File)
    File Size: 10944871 bytes
    File Date: Fri Sep 22 04:24:10 2006

    This is the document entitled "Evaluation of the Flood Risk Factor in the Design of Box Culverts", FHWA RD-74-11. This report is an engineering analysis procedure to reduce flood-related damage to highways on a sound probabilistic basis, considering hydrologic hydraulic, and economic factors.

    Download Grate Inlet Design Document (PDF File)
    File Size: 9049601 bytes
    File Date: Fri Sep 22 04:13:22 2006

    This is the document entitled "Hydraulic Characteristics of Two Bicycle-safe Grate Inlet Designs", FHWA RD-74-77, November 1974. This study tested two design concepts for bicycle-safe grate inlets for hydraulic performance and compared them to more traditional designs. The two concepts are the 45°-tilted bar and the so called "Massachusetts Cascade" designs.

    Download Stream Channel Gradation Document (PDF File)
    File Size: 9239333 bytes
    File Date: Fri Sep 22 04:16:30 2006

    This is the document entitled "Stream Channel Degradation and Aggradation: Causes and Consequences to Highways", FHWA RD-80-038, June 1980. This report describes a research effort on stream-channel aggradation and degradation. Gradation changes are long-term channel bed elevation changes which extend for long distances along the streambed. This report describes the extent of problems nationwide, examines the causes of gradation changes, documents case studies where highway crossings have been affected, and summarizes methods available for recognizing the potential for bed level changes.

    Download Relocated Stream Channels Document (PDF File)
    File Size: 50267777 bytes
    File Date: Fri Sep 22 04:55:56 2006

    This is the document entitled "Stability of Relocated Stream Channels", FHWA RD-80-158, March 1981. This study documents with case histories the performance of a representative variety of natural stream channels that have been relocated or otherwise altered for purposes of bridge or highway construction. It identifies critical factors associated with stability or lack of stability of altered channels. It includes discussion of the physical effects of erosion-control measures, fish habitat structures, and structures such as bridges and culverts.

    Download Stream Hazards Document (PDF File)
    File Size: 31828021 bytes
    File Date: Fri Sep 22 04:39:09 2006

    This is the document entitled "Methods for Assessment of Stream-Related Hazards to Highways and Bridges", FHWA RD-80-160, March 1981. This report is a reference of techniques for evaluating stream-related hazards to highways and bridges. It provides insight into the application of remote sensing and slope stability evaluation. It also extends the perspective of crossing design to include the entire river system and the effects of land use changes. The report provides a procedure that permits evaluation of the relative stability of a river and identification of hazards that can affect a crossing.

    Download Scour Document (PDF File)
    File Size: 6802619 bytes
    File Date: Fri Sep 22 03:33:25 2006

    This is the document entitled "Scour at Culvert Outlets in Mixed Bed Materials", FHWA RD-82-011, September 1982. This report described a study to observe and analyze scour and erosion holes in noncohesive and cohesive material at culvert outlets and to formulate empirical design criteria for predicting scour hole geometry. It refines and extends techniques for predicting the dimensions of scour holes.

    Download Streambank Stabilization Structures Document (PDF File)
    File Size: 10718321 bytes
    File Date: Fri Sep 22 03:42:52 2006

    This is the document entitled "Design of Spur-type Streambank Stabilization Structures", FHWA RD-84-101, July 1985. A study of the applicability and design of spur-type flow-control and streambank stabilization structures has been conducted to establish design guidelines and other criteria for the use of spurs. Recommendations for the general application of spur-type structures are given in relation to function of the spur, the erosion mechanisms that are countered by spurs, the environmental conditions best suited for the use of spurs, and potential negative impacts produced by spurs. An introduction to the most common types of spurs is given, along with discussions of the factors most important to the design of specific spur types. Design guidelines for establishing spur permeability, the required extent of protection, spur length, spur spacing, spur orientation, spur height, spur crest profile, and the shape of the spur tip or head are presented.

    Download Bridge Waterways Document (PDF File)
    File Size: 7371857 bytes
    File Date: Fri Sep 22 03:49:07 2006

    This is the document entitled "Bridge Waterways Analysis Model: Research Report", FHWA RD-86-108, July 1986. This report describes WSPRO which is a digital model for water-surface profile computations.

    Download Flexible Ditch Linings Document (PDF File)
    File Size: 6032126 bytes
    File Date: Fri Sep 22 04:07:19 2006

    This is the document entitled "Performance of Flexible Ditch Linings", FHWA RD-86-114, September 1985. This document reports a series of tests to determine the performance of ten flexible ditch lining materials. The objectives of the tests were to determine the effect of the flexible liners on the germination and growth of grass and to determine the effectiveness of the liners to prevent erosion on highway channels until the establishment of vegetation.

    Download Embankment Damage Document (PDF File)
    File Size: 20417976 bytes
    File Date: Fri Sep 22 04:03:41 2006

    This is the document entitled "Development of a Methodology for Estimating Embankment Damage Due to Flood Overtopping", FHWA RD-86-126, March 1987. This document reports a study that conducted laboratory tests and developed a methodology to quantitatively determine embankment damage and assess protective measures. It collected literature and field data and conducted tests on embankment surfaces with and without protective measures. A computer model was developed to determine hydraulics of overtopping flow and associated erosion damage. This model was verified using field data and laboratory test results, and was utilized to generate charts for estimating embankment damage.

    Download Concrete Block Revetment Systems Document (PDF File)
    File Size: 13346465 bytes
    File Date: Fri Sep 22 03:27:49 2006

    This is the document entitled "Hydraulic Stability of Articulated Concrete Block Revetment Systems During Overtopping Flow", FHWA RD-86-199, November 1989. This report presents a study where the hydraulic characteristics and stability of articulated concrete block revetment systems in high-velocity overtopping flow were examined. Seventeen hydraulic tests were performed on five different revetment systems, including cable and uncabled installations. Relationships involving pressure, velocity, depth, and slope on the stability and resistance to flow are developed and presented.

    Download Storm Water Runoff Disposal Manual (PDF File)

    This is the document entitled "Underground Disposal of Storm Water Runoff", FHWA TS-80-218. This manual's purpose is to provide the information necessary to evaluate for feasibility, as well as to plan and design, surface and subsurface infiltration systems or combination systems that can be incorporated into the overall drainage scheme of a particular transportation facility, street system, or commercial development.

    Download Urban Highway Drainage Document (PDF File)
    File Size: 8037994 bytes
    File Date: Fri Sep 22 07:23:47 2006

    This is the document entitled "Design of Urban Highway Drainage", FHWA TS-79-225, August 1979.
  • Additional Technical Documentation

    To download the following technical documents, check the box of the desired documents below and then click the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat version 4.0 PDF format.

    River and Stream Corridor Management Guide
    File Size: 44892583 bytes
    File Date: Fri Sep 22 07:20:18 2006

    This guide is an excellent document to understanding stream and streambank dynamics. Watersheds, Channel Evolution Models, Urban Stream Corridors, Rural Stream Corridors, Riparian Management, Restoration vs. Stabilization, Soil Bioengineering, Bendway Weirs, and Rock Vanes are discussed. Excellent color photographs are provided throughout the document.

    This guide was published by the Kansas State Conservation Commission.

    Flood Studies Work Plan
    File Size: 362756 bytes
    File Date: Fri Sep 22 05:19:59 2006

    This PDF technical document describes, in general terms, the hydrologic work necessary for a flood study.

    Flood Studies and Maps
    File Size: 1423979 bytes
    File Date: Fri Sep 22 05:19:43 2006

    Flood maps are a vital part of a floodplain management program, so it is important to understand how the maps are made and to be familiar with the information that is available within the accompanying flood study. This PDF technical document provides an overview of flood study terms and how studies and maps are prepared.

    Floodway Analysis for SWMM Models
    File Size: 506557 bytes
    File Date: Fri Sep 22 05:18:44 2006

    This PDF technical document explains the procedures to follow in performing a floodway analysis in the US EPA's SWMM model.

    Detention Pond Outlet Structure: Design Criteria for Energy Dissipators (PDF File)
    File Size: 2363106 bytes
    File Date: Fri Sep 22 05:17:16 2006

    Erosion problems at culverts or the outlet from detention basins are common. Determination of the flow conditions, scour potential, and channel erosion resistance are standard procedure for all designs. The only safe procedure is to design on the basis that erosion at a culvert outlet and the downstream channel is to be expected.

    Standard practice is to use the same headwall treatment at the culvert entrance and exit. It is important to recognize that the inlet is designed to improve culvert capacity or reduce head loss while the outlet structure should provide a smooth flow transition back to the natural channel or into an energy dissipator. Outlet structures should provide uniform redistribution or spreading of the flow without excessive separation and turbulence.

    This PDF Technical Document will focus on riprap apron, riprap outlet basins, and baffled outlets because for many designs, these outlet protection and energy dissipators provide sufficient protection at a reasonable cost.

    Download Water Table Control (PDF File)
    File Size: 2998343 bytes
    File Date: Fri Sep 22 07:24:38 2006

    Water table control is installed to improve the soil environment for vegetative growth, improve water quality, regulate or manage water for irrigation and drainage, make more effective use of rainfall, reduce the demand for irrigation water, reduce runoff of freshwater to saline nursery areas, and facilitate leaching of saline and alkali soil.

    This technical document on water table control is a guide for the evaluation of potential sites and the design, installation, and management of water table control in humid areas. The information presented encompasses sound research and judgments based on short-term observations and experience.

    Download Ground Water and Surface Water: A Single Resource (PDF File)
    File Size: 12191593 bytes
    File Date: Tue Mar 14 03:24:33 2006

    Understanding the interaction of ground water and surface water is essential to water managers and water scientists. Management of one component of the hydrologic system, such as a stream or an aquifer, is only partly effective because each hydrologic component is in continuing interaction with other components. This PDF technical document has some examples of common water-resource issues where understanding the interconnections of ground water and surface water is fundamental to development of effective water-resource management and policy.

    Download WES Stream Investigation and Streambank Stabilization Handbook (PDF File)
    File Size: 9949805 bytes
    File Date: Tue Jun 11 09:06:18 2002

    Recently, there has been a growing interest in the development of low-cost, environmentally friendly bank protection techniques, that are suitable for anyone with limited resources. Many of these techniques have been quite successful, while others have not performed as intended. Many designers make the mistake of trying to apply one protection technique to all situations, regardless of the site conditions. This often results in an ineffective design leading to structure failure. Even if the appropriate protection technique is selected, failure may still occur if proper design procedures are not followed. This manual provides the necessary guidance for making intelligent decisions when selecting and designing streambank protection measures or deciding not to install bank protection.

    Download Documentation on Detention Pond Design (PDF File)
    File Size: 1318314 bytes
    File Date: Fri Sep 22 07:21:13 2006

    The traditional design of storm drainage systems has been to collect and convey storm runoff as rapidly as possible to a suitable location where it can be discharged. As areas urbanize this type of design may result in major drainage and flooding problems downstream. Under favorable conditions, the temporary storage of some of the storm runoff can decrease downstream flows and often the cost of the downstream conveyance system. Detention storage facilities can range from small facilities contained in parking lots or other on-site facilities to large lakes and reservoirs. This PDF file provides a general design criteria for detention/retention storage basins as well as procedures for performing preliminary and final sizing and reservoir routing calculations.

    Download Documentation on Culvert Design (PDF File)
    File Size: 3907805 bytes
    File Date: Fri Sep 22 05:15:36 2006

    Performance curves should be developed for all culverts for evaluating the hydraulic capacity of a culvert for various headwaters. These will display the consequence of high flow rates at the site and any possible hazards. Sometimes a small increase in flow rate can affect a culvert design. If only the design peak discharge is used in the design, the engineer cannot assess what effect increases in the estimated design discharge will have on the culvert design. For more information, download this PDF document.

    Download National Engineering Hydrology Handbook (PDF File)
    File Size: 14855288 bytes
    File Date: Tue Mar 14 03:40:37 2006

    The NRCS National Engineering Handbook (NEH) is intended primarily for Natural Resources Conservation Service (NRCS) engineers and technicians. It presents material needed to carry out NRCS responsibilities in natural resources conservation and flood prevention.

    Download Documentation on Loose Riprap Protection (PDF File)
    File Size: 5587624 bytes
    File Date: Fri Sep 22 09:13:31 2006

    This document describes the design of rock riprap protection for streambanks, channels, pipe outlets, and scour holes. The current version is dated July 1989.

    Download HEC-2 Island Split Flow Example (PDF File)
    File Size: 148187 bytes
    File Date: Fri Sep 22 09:11:32 2006

    There are many types of split flow situations that can occur in a river. The following is a list of the more commonly encountered split flow situations:

    1. Split flows caused by islands or high ground dividing the flow.


    2. Split flows caused by levee overtopping.


    3. Split flows caused by watershed divide overtopping.


    4. Split flows caused by diversion structures.

    The HEC-2 split flow option is capable of analyzing all of the above split flow situations except for bifurcation of flow at islands or high ground. In addition, HEC-RAS cannot model any of the above split flow situations.

    This document describes how to model the bifurcation of flow at an island using HEC-2 (or HEC-RAS) and a graphical interpolation method. This interpolation method can be used whenever flow is separated into two or more channels. For example, this method can be used to model divided flow when there are multiple bridge openings at a roadway crossing (when the conveyance is separated among the bridge openings).

    Download Documentation on Detention Pond Design (PDF File)
    File Size: 24821 bytes
    File Date: Tue Mar 14 03:40:41 2006

    This files contains lecture notes from the University of Texas on detention pond design.

    Download Documentation on Design Storm Development (PDF File)
    File Size: 23705 bytes
    File Date: Tue Mar 14 03:40:40 2006

    This file contains lecture notes from the University of Texas on design storm development.

    Download Documentation on Culvert Design (PDF File)
    File Size: 65599 bytes
    File Date: Tue Mar 14 03:40:39 2006

    This file contains lecture notes from the University of Texas on culvert design.

    Download Instructions for the ArcInfo ARCDXF command (PDF File)
    File Size: 19858 bytes
    File Date: Tue Mar 14 03:40:38 2006

    This document contains the instructions for the ArcInfo ARCDXF command (used for creating a RiverNET-readable DXF file from an ArcInfo coverage).

    If you have an ArcInfo vector coverage, you can convert this ArcInfo data to a DXF file using the following command:

    ARCDXF .dxf line_cov point_cov annot_cov

    The command above will save a file called .dxf that will contain all the vector data contained in line_cov (a line coverage in ArcInfo), point_cov (a point coverage in ArcInfo), and annot_cov (an annotation coverage in ArcInfo).

    Download Instructions for the ArcInfo GRIDASCII command (PDF File)
    File Size: 8808 bytes
    File Date: Tue Mar 14 03:41:04 2006

    This document contains the instructions for the ArcInfo GRIDASCII command (used for creating a RiverNET-readable ASCII grid file from an ArcInfo grid coverage).

    If you have an ArcInfo Grid coverage, you can convert this ArcInfo data to an ArcInfo ASCII grid file (that can be read into RiverNET) using the following command:

    GRIDASCII in_grd grid.asc

    The command above will save an ArcInfo ASCII Grid file called grid.asc that contains the data for each cell in in_grd in an ASCII grid file format. The VALUE attribute will be converted to the ASCII grid file format. Most of the time, this VALUE attribute will be elevation, so you will end up with an ASCII elevation grid.

    Download Documentation on Using DEM Data for Creating DAMBRK Cross Sections (PDF File)
    File Size: 253831 bytes
    File Date: Mon Aug 27 15:19:57 2001

    BOSS RiverNET and BOSS RMS (River Modeling System) can be used with DEM (Digital Elevation Map) data for creating BOSS DAMBRK cross sections. This document describes the steps necessary for creating DAMBRK cross sections from DEM data using BOSS RiverNET and BOSS RMS.
  • Riprap Channel Protection Design Software

    To download the following Riprap Channel Protection Design Software, check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link.

    Riprap Channel Protection Design Software (ZIP File)
    File Size: 2916100 bytes
    File Date: Fri Sep 22 10:42:38 2006

    The Riprap Channel Protection Design Software addresses three areas pertinent to the design of channel protection:

    • The program contains the U.S. Army Corps of Engineers (USACE) riprap design guidance for placement in the dry for channels subjected to velocity forces in low turbulent flow based on guidance found in USACE (1994).
    • The program provides guidance for the design of gabion mattresses for the same flow conditions as the riprap design guidance. The gabion sizing guidance is based on Maynord (1995).
    • The program provides guidance for estimating scour depth in erodible channels based on guidance given in Maynord (1996).

    To install the software, perform the following steps:

    1. Place the zip file into a temporary folder.
    2. Unzip the zip file.
    3. Double click setup.exe.
    4. Follow the onscreen directions to install.

  • HEC-DSS Programming Utility

    To download the following HEC-DSS Programming Utility, check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link.

    Time Series Manager
    File Size: 714936 bytes
    File Date: Fri Sep 22 11:12:38 2006

    Time Series Manager correctly and efficiently manages small and large quantities of time series data. Moreover, it includes functionality to manage those data using HEC-DSS databases, developed by the Hydrologic Engineering Center. It is useful even if you don't use HEC-DSS because it transforms data to and from other data stores. If you do use HEC-DSS, you'll find additional classes for accessing paired data and gridded data, and for efficiently querying HEC-DSS catalogs. If you want to know more, just download and browse the help file.
  • Unit Conversion Utility

    To download the following Unit Conversion Utility, check the box below and then click the "Download Selected" button. An e-mail will be sent to you with the download links.

    ESB Unit Conversion Utility
    File Size: 700910 bytes
    File Date: Fri Sep 22 10:47:33 2006

    User friendly unit conversion utility that easily converts between units of measurement. The ESB Unit Conversion Utility includes conversions for temperature, distance, mass, area, volume, pressure, velocity, acceleration, force, energy, power, fuel consumption, flow, torque, angles, time, and radioactivity.

    Download Convert (Unit Conversion) Utility
    File Size: 171752 bytes
    File Date: Fri Sep 22 10:42:57 2006

    This easy-to-use unit conversion program will convert the most popular units of distance, temperature, volume, time, speed, mass, power, density, pressure, energy and many others, including the ability to create custom conversions!

    This utility was developed by Josh Madison.

  • File Comparison Utility

    To download the following File Comparison Utility, check the box below and then click the "Download Selected" button. An e-mail will be sent to you with the download links.

    Comparator
    File Size: 520324 bytes
    File Date: Fri Sep 22 10:42:54 2006

    Comparator is a cool power utility that will take away the tedium of finding, deleting and copying over duplicate files. With Comparator you will no longer need to open two Explorer windows to make painstaking comparisons between directories.

    Comparator is an alternative to the Microsoft Briefcase, so install this FREE program everywhere you go to keep your files in sync.
  • WSP2 to HEC-RAS Conversion Utility

    To download the following WSP2 to HEC-RAS Conversion Utility, check the appropriate box below and then click the "Download Selected" button. An e-mail will be sent to you with the download links.

    Download WSP2 to HEC-RAS Conversion Utility (Full Version)
    File Size: 3607467 bytes
    File Date: Fri Sep 22 09:49:03 2006

    This utility converts WSP2 card files to HEC-RAS project files. This program is a full version which includes graphics.

    To install this program, please save the downloaded self-extracting zip file into a temporary directory and then execute it. It will extract 4 files. Execute SETUP.EXE and it will start the installation process.

    Download WSP2 to HEC-RAS Conversion Utility (Small Version)
    File Size: 3608505 bytes
    File Date: Fri Sep 22 09:50:01 2006

    This utility converts WSP2 card files to HEC-RAS project files. This program is a small version which does not include graphics.

    To install this program, please save the downloaded self-extracting zip file into a temporary directory and then execute it. It will extract 4 files. Execute SETUP.EXE and it will start the installation process.

  • TR-20 Rating Table Program

    To download the following TR-20 Rating Table Program, check the box below and then click the "Download Selected" button. An e-mail will be sent to you with the download link.

    Download TR-20 Rating Table Program
    File Size: 134986 bytes
    File Date: Fri Sep 22 11:14:18 2006

    One reason for computing water surface profiles is to develop cross section rating tables used in the NRCS TR-20 program for flood routing of stream reaches. The WSP2 program developed these tables as an option. However, HEC-RAS does not automatically develop these tables in the correct format for TR-20. For this reason, a program (named Rating_Table.exe) was written by NRCS to take a HEC-RAS output file and develop rating tables formatted for input to TR-20. HEC-RAS has many optional output variables and allows the user to develop a customized table with certain desired information. This customized table, once created and saved, will be accessible for use whenever HEC-RAS is run on the various projects and plans organized by the user. The program was written based on output from HEC-RAS version 2.2.
  • HEC-RAS to UNET Conversion Utility

    To download the following HEC-RAS to UNET Conversion Utility, check the box below and then click the "Download Selected" button. An e-mail will be sent to you with the download link.

    Download HEC-RAS to UNET Conversion Utility
    File Size: 165943 bytes
    File Date: Fri Sep 22 11:02:02 2006

    This utility converts a HEC-RAS geometry file to UNET cross sectionfile.
  • HEC2 <==> WSPRO Conversion Program

    To download the following HEC2 <==> WSPRO Conversion Utility, check the box below and then click the "Download Selected" button. An e-mail will be sent to you with the download link.

    Download HEC2 <==> WSPRO Conversion Program
    File Size: 79463 bytes
    File Date: Fri Sep 22 11:06:38 2006

    This program was developed by the Florida Department of Transportation and converts the card files between HEC-2 and WSPRO.

    Note that there are some limitations with this program. Please refer to the included documentation for details.

  • DEM Utilities

    To download the following DEM utilities, check the boxes of the desired utilities below and then click the "Download Selected" button. An e-mail will be sent to you with the download links.

    Download SDTS DEM to ArcInfo Grid Conversion Program
    File Size: 227090 bytes
    File Date: Fri Sep 22 11:04:00 2006

    This program converts SDTS DEM files to a ArcInfo ASCII grid import data file.

    This program was developed by Sol Katz of U.S. Bureau of Land Management.

    Download SDTS DEM to DEM Conversion Program
    File Size: 237144 bytes
    File Date: Fri Sep 22 11:04:05 2006

    This program converts SDTS DEM files to a data file which is a reconstruction of the original DEM source file.

    This program was developed by Sol Katz of U.S. Bureau of Land Management.

    Download SDTS DEM to DLG3 Conversion Program
    File Size: 277366 bytes
    File Date: Fri Sep 22 11:04:09 2006

    This program converts an SDTS file to a data file which is a reconstruction of the original DLG3 optional source file.

    This program was developed by Sol Katz of U.S. Bureau of Land Management.

    Download SDTS Conversion Program
    File Size: 212418 bytes
    File Date: Fri Sep 22 11:04:31 2006

    This program converts SDTS records interactively one at a time. Output goes to both the computer screen/window and an optional report file on disk.

    This program was developed by Sol Katz of U.S. Bureau of Land Management.

    Download SDTS DEM to DXF Conversion Program
    File Size: 248766 bytes
    File Date: Fri Sep 22 11:04:14 2006

    This program converts an SDTS file to a data file which is DXF compatible.

    This program was developed by Sol Katz of U.S. Bureau of Land Management.

    Download SDTS DEM to MapInfo Exchange Format Conversion Program
    File Size: 248726 bytes
    File Date: Fri Sep 22 11:04:18 2006

    This program converts an SDTS line file to a data file which is compatible with MapInfo. It creates a MIF file of coordinates and a MID file with line record # and attribute record #.

    This program was developed by Sol Katz of U.S. Bureau of Land Management.

    Download SDTS DEM to IDRISI VEC Conversion Program
    File Size: 259000 bytes
    File Date: Fri Sep 22 11:04:23 2006

    This program converts SDTS files to a format that Idrisi can read.

    This program was developed by Sol Katz of U.S. Bureau of Land Management.

    Download SDTS DEM to Surfer Conversion Program
    File Size: 227612 bytes
    File Date: Fri Sep 22 11:04:27 2006

    This program converts SDTS DEM files to a Surfer ASCII grid import data file.

    This program was developed by Sol Katz of U.S. Bureau of Land Management.

  • USGS Digital Cartographic Data Viewer

    To download the following USGS Digital Cartographic Data Viewer, check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link.

    Download dlgv32 USGS Digital Cartographic Data Viewer for Windows
    File Size: 3143950 bytes
    File Date: Fri Sep 22 10:44:21 2006

    dlgv32 is windows software for viewing a variety of digital cartographic data.

    The following spatial data products can be displayed in dlgv32 v3.6:

    • USGS digital line graph, optional format (DLG-O)
    • USGS digital line graph, Spatial Data Transfer Standard format (DLG/SDTS)
    • USGS digital elevation model (DEM)
    • USGS digital elevation model, Spatial Data Transfer Standard format (DEM/SDTS)
    • USGS digital elevation model, GeoTIFF format
    • USGS digital raster graphic (DRG), GeoTIFF format
    • USGS digital orthophoto quads (DOQ), GeoTIFF format
    • Global 30-arc-second digital elevation data (GTOPO30)
    • NOAA DSDATA geodetic control, SDTS format
    • NOAA Terrain Base elevation data
    • Canadian Digital Elevation Data (CDED)

  • Raster Image File Examples

    To download the following raster image file examples which can be used with BOSS RiverNET, check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link.

    Download Raster Image Files
    File Size: 2243701 bytes
    File Date: Fri Sep 22 07:35:28 2006

    The Raster Image Module allows raster images, such as USGS quadrangle maps and scanned aerial photographs, to be displayed as a background image. This allows you to verify your modeling work as you do it, using readily available imagery. Georeferenced TIFF (i.e., GeoTIFF), JPEG, TIFF, GIF, PCX, BMP, and many other raster image formats are supported.