The wiki format for the Minnesota Stormwater Manual allows for continual updates. While this has the advantage of keeping the information in the manual aligned with the most recent advances and information on stormwater management, it creates challenges for project leads, engineers, developers, and others who comply with specifications in the manual. Specifications may change from one project to the next. Local regulations, such as ordinances, may refer to the manual, which creates either a challenge of keeping on top of changes in the manual or having to refer to a specific version of the manual.
The MPCA recommends that older guidance, such as the 2005 or 2008 Minnesota Stormwater Manual (Version 2.X or earlier) and the Stormwater Best Management Practices Manual (Protecting water quality in urban areas), not be used in stormwater development projects or be incorporated into local regulations and ordinances. Significant advances in BMP design, construction, maintenance, and performance require using recent information.
This page describes some options for addressing the problem of using and referencing the Minnesota Stormwater Manual.
At the bottom of each page is a statement identifying the date and time of the most recent update to the page. Another option is to click on Page information in the left toolbar. This opens a page listing the date of latest edit, as well as other information about the page.
The wiki retains copies of all edits (changes) to the manual. However, it can be challenging to find the specific page and date of interest. Follow the procedure below to identify updates of interest.
The image gallery below illustrates this process for the manual page called Design criteria for bioretention.
Using the manual page called Design criteria for bioretention as an example, assume we are looking at the January 19, 2017 version of this page. The image to the left shows a screen shot of the resulting page. Note the arrows in this image were added to point out the features of this page. You can select from different versions immediately before or after the selected version. To see the difference between two versions, click on the diff link. A screen shot in the image to the right shows that two versions are laid next to each other to allow comparisons of text that has been added (orange shading) or deleted (blue shading). You can view the source coding by clicking on view source. Note that each version also includes information on the date and time the revision was created and the name of the person who made the revisions. A link to all stormwater manual revisions is included (shown as contribs, which was discussed in the previous section).
There are options for referencing a version of the Minnesota Stormwater Manual. For example, an ordinance might state "design specifications must conform to the Minnesota Stormwater Manual". Example language for this scenario is included in the option discussions below.
As a point of clarification, citing the manual, such as in a document, differs from the discussion above in which a version of the manual or manual page is being referenced. Guidance for citing the manual can be accessed by clicking on Cite this page under Tools in the left toolbar.