Urban Storm Drainage Criteria Manual
We no longer publish our Urban Storm Drainage Criteria Manual (USDCM) in printed form.  All three volumes of this manual  and all of the updates to these three volumes are posted on our web page , namely, www.udfcd.org.  You may download any of these free of charge.  You can choose to download each volume in its entirety via a self-extracting Zip file or each chapter individually.  Each chapter is marked with the revision date to tell you if the one you have is current.

We encourage you to check for latest updates to the manual and related materials on a regular basis.  New updates to the manual and new versions of the software, spreadsheets, and AutoCAD drawings to assist you with the calculations and design can be posted at any time.  We try to e-mail as many people that we have on record of major new posting, but there is no guarantee that any individual or company will get such a notice because our record may not be complete or out of date.

By the time you read this article, another significant revision to Volume 3 will probably be posted on our web site.  In addition, several smaller revisions to Volumes 1 and 2 are in the pipeline.

Ken MacKenzie of the Design and Construction Program has authored another major revision of the spreadsheets for the design of stormwater inlets, analysis of street flow and detention basins.  If you have not yet had a chance to download these spreadsheets or others, I urge you to do so.  Ken, in cooperation with many cities and counties within the District is negotiating with Colorado State University to do scale modeling for the types of inlets used in the Denver region.  We hope this will improve on the design guidance that is in practice today.  We now hope to have this testing program under way in 2006.

District’s Software
We have completed our effort to  integrate the District’s CUHP software into a new, Windows-based, EPA’s SWMM 5.0.

For the last two years EPA has been working on rewriting the SWMM software and to provide a graphical user interface (GUI).  Go to the web page http://www.epa.gov/ednnrmrl/swmm to download this software free of charge.  The District’s new CUHP 2005 model now interfaces with the EPA’s model and we no longer will support the old versions.

The CUHP model works with the new EPA’s software in a similar fashion as the old version, namely, it generates runoff hydrographs that are then routed by SWMM 5.0.  The new version, titled CUHP 2005, relies on Microsoft Excel for the preparation and editing of input data and manage the output.  It also provides a converter to convert the older CUHP and UDSWM inputs to run under the new software.  This model may also be downloaded free of charge form our website.  However, the work continues and we hope to add capabilities in the future to CUHP 2005, such as ability to perform continuous simulation.  In addition to the above, new versions of UDPOND and UDSEWER that contain corrections and updates are now available for downloading.

District’s April 2005 Seminar
Again our annual seminar series continues to be successful when measured by attendance.  On April 28, of 2005, we held a seminar titled: Emerging Technologies and Practices in Urban Stormwater Management.  It was attended by over 230 participants from municipalities, federal and state governments, consultants and other organizations.  The proceedings are available at: http://udfcd.org/conferences/conferences.htm

Douglas and Arapahoe Counties Criteria Manual Update Project
The District continues to work with the preparation of updated stormwater criteria manuals for Douglas and Arapahoe Counties.  The consultant for this project is Muller Engineering Company.  Since the project began in 2003, the Cities of Centennial, Lone Tree and Castle Rock have joined this effort.  At this time the final versions of this manual are expected to be released in early 2006.

Denver is updating it Stormwater Design and Technical Criteria
Denver’s Wastewater Management Division has launched an effort to update its Stormwater Design and Technical Criteria.  The District has been managing this project and is working with Denver and Wright Water Engineers, Inc., the project’s consultant.  At this time look for the release of the completed manual early in 2006.