I accompanied Becky on a business trip to Vancouver, Washington, a few weeks back. Since I was on my own while she was in her conference, I spent a little time walking around. Several of the streets I walked on were fairly major thoroughfares. I don’t know if they were defined as “Complete Streets” there, but they met my definition, having bike lanes and spacious sidewalks. Honestly, I thought there was an excessive amount of paving, considering they had continuous paved center turn lanes between intersections, despite prohibiting driveways, and including wide sidewalks along with bike lanes which seemed redundant. It was overall a nice look though.
One of the interesting features were areas carved out into the adjacent developments for stormwater detention. These were obviously for the streets and not the adjacent developments. While I’ve seen this done on a small scale creating curbside rain gardens (Like the one by the LaPorte Library completed in partnership with Purdue.), these were full blown detention ponds, 2′-3′ deep and capable of holding upwards of 4,000 cubic feet of water. They were landscaped as mini parks and maintained with turf and trees rather than going the route of a wetlands or marsh type look. I thought this was an interesting idea.
These were large city blocks. It struck me that there was a missed opportunity to turn those small oases into actual mini parks. I know there is always the public safety concern about someone being caught in a storm, if someone was in them when they fulfill their design of holding water. (I was pleased that this concern wasn’t taken to the extreme where they were fenced.) Without doing anything in the basins themselves, their could have been seating around the perimeter taking advantage of the shade trees planted there. Another idea would be to create a pier type structure out into the basin with seating or even a gazebo.
The same thought could be applied locally. When detention ponds are installed in our area, they are either designed to be mowed or designed to be naturalized. In most cases, they are not considered a feature, but are designed to be functional and to fulfill a permit requirement. But could we do better?
The gazebo on a pier idea could work nearly everywhere and change a functional stormwater control requirement into a respite. Along these same lines, ponds are generally designed to maximize volume while taking up minimum space. What if they included a peninsula into the pond that could be walked on or landscaped to break-up the functional and be more naturalized? One pond that comes to mind for this is the new municipal detention pond in Plymouth across from the Neighborhood Center. What a great opportunity for the City to set an example?
If there are any civil engineers reading this, I’m sure they are cringing. They like to keep things simple and anything that affects the flow of water, creates additional calculations for them to do. That said, anything that slows the flow is a net positive. Some of these things could be incorporated around the control structure and actually make maintenance easier.
This isn’t something that could always be done. We have had projects where we have struggled to meet the detention requirements due to capacity needs vs site size. We have also had deep and steep ponds due to various factors that are not conducive to bringing the public to them. But there’s no reason that other options shouldn’t be considered when possible. Detention ponds don’t have to be purely function and aesthetic eyesores…
