HY-8 Culvert Hydraulic Analysis Program
WisDOT Bridge Manual Chapter 36 – Box Culverts July 2018 36-5 36.2 General Box culverts are reinforced concrete closed rigid frames which must support vertical earth and truck loads and lateral earth pressure. They may be either single or multi-cell.
HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software.
System Compatibility
HY-8 is a 32-bit program, but it is fully compatible with 32 and 64-bit Windows-based operating systems (XP, Vista, Windows 7, and Windows 10) and runs in 32-bit mode on these operating systems. When installing HY-8, make sure you have permissions on your computer to install programs (usually this requires administrator permissions or a username and password for an administrator account). If you do not have administrator permissions on your account, you need to right-click on the installation program and select the 'Run as Administrator' option if running Windows Vista or Windows 7. Windows XP users should login to an account that allows you to install software before installing HY-8.
Download Agreement
By downloading the software, users acknowledge that they have read and agree to the following conditions:
- The application of this software is the responsibility of the user. It is imperative that the responsible designer understands the potential accuracy limitations of the program results, independently cross checks those results with other methods, and examines the reasonableness of the results with engineering knowledge and experience.
- There are no expressed or implied warranties.
I agree to these conditions, download the software:
HY-8 Version 7.60
- Build Date July 30, 2019. This version does not include new features, but rather: 1) corrects computational issues with embedded circular culverts, 2) fixes many reported bugs, 3) improves computational stability, and 4) updates the user interface. The HY-8 User’s Manual included with the software package (available by selecting “HY-8 Help” in the “Help” drop-down menu) describes the corrections to the embedded circular culvert logic in Section 4.1, Embedment Depth. Please email Eric Brown ([email protected]) if you want additional details on the implemented corrections to embedded circular culverts and a complete list of maintenance items implemented in Version 7.60.
- Download HY-8 Version 7.60 (.zip, 88 mb)
HY-8 Version 7.50
- Build Date July 28, 2016. This version contains two new calculators: a) a calculator to assist with the FHWA's culvert aquatic organism passage (AOP) design procedure, which is described in detail within Hydraulic Engineering Circular 26, 'Culvert Design for Aquatic Organism Passage, First Edition' (HEC-26), and b) a calculator to determine the variation in cross-sectional flow velocity from the culvert wall to the centerline, which is described within Research Publication No. FHWA-HRT-14-064, 'Fish Passage in Large Culverts with Low Flows'.
Improvements made to this version of the software include: corrections to the AOP calculator, a correction to the calculation of roadway overtopping for various scenarios, a correction to the calculation of composite Manning's n values for user defined shapes, edits to the Saint Anthony Falls (SAF) Energy Dissipator routine, and edits to the Riprap Basin Dissipator routine.- Download HY-8 Version 7.50 (.zip, 87 mb)
Reporting Issues
If you believe you have found an issue with any version of HY-8 (including installation errors, calculation errors, interface problems, confusing functions, errors and omissions in the User Manual, and anything else that might impact the functionality and usability of the software), please submit the following information to [email protected] (please note that in most cases you will not receive a personalized email response from the email administrator):
- Name
- Contact info (this won't be used unless there is a question about your HY-8 issue)
- Computer operating system (Windows 8, Windows Vista, etc.)
- Complete description of each issue
- PLEASE attach the HY-8 project file (.hy8) that demonstrates the issue
- Also consider attaching a screen shot of the HY-8 window if applicable
Software
The FHWA software available at this site is in the public domain and is available for downloading as zipped files or self-extracting zipped files. This software may be downloaded and used without restriction.
By downloading the software, the user accepts responsibility for understanding the following conditions and limitations, and agrees to them:
- The FHWA does not provide user assistance or support for this software.
- The application of this software is the responsibility of the user. It is imperative that the responsible engineer understands the potential accuracy limitations of the program results, independently cross checks those results with other methods, and examines the reasonableness of the results with engineering knowledge and experience.
- There are no expressed or implied warranties.
Links to software produced by others (HEC-RAS, WMS, and SMS) are also provided below.
Application | Software and Tools | Date | Contact |
---|---|---|---|
Culvert Hydraulic Analysis & Design | HY 8 Culvert Hydraulic Analysis Program Companion Resource:
| 2019 | Eric Brown |
Bridge Scour Assessment and Summary Riprap Analysis Channel Lining Design Rock / Sediment Gradation Analysis Curb and Gutter / Inlet Analysis Detention Basin Analysis Rational Method Hydrologic Analysis Channel and Weir Analysis | Hydraulic Toolbox Companion Resources:
| 2014 | Veronica Ghelardi |
Hydrologic Analysis (Rational method, Regression Equations, TR-55, TR-20, HEC-HMS) Basin Delineation Storm Drain Analysis & Pump Station Design (HY 12) HEC-RAS Model Development | Watershed Modeling System (WMS)* Companion Resources:
| 2016 | Cynthia Nurmi |
Two-Dimensional Hydraulic Analysis | Surface-Water Modeling System (SMS)* Companion Resources:
| 2016 | Scott Hogan |
One-Dimensional Hydraulic Analysis | Hydrologic Engineering Center’s River Analysis System (HEC-RAS) Companion Resources:
| 2016 | Laura Girard |
Climate Adaptation | Climate Change Adaptation Tools | 2016 | Mike Culp |
* Through an arrangement between FHWA and Aquaveo, free WMS and SMS licenses are provided to state DOT and FHWA employees. Please refer to the licensing instructions (found under 'Companion Resources' in the table above), for additional details and directions on downloading and registering these software programs.