The pond in question was neglected for years and as a result became overgrown with excessive vegetation prior to us beginning treatment earlier this summer. The reality of the situation is that the pond in question was deliberately designed to be shallow and as such was intended to allow for herbaceous species to fill in. The herbaceous vegetation helps to filter out pollution from stormwater before it is discharged into nearby waterways or before it can filter into the ground.
There are areas of the pond that are dead (brown) because we have been actively spraying the woody and invasive species while intentionally leaving suitable grasses and beneficial species untouched. Over time, we anticipate that the herbaceous and beneficial species will slowly repopulate those areas that are being sprayed. Keep in mind that it took many years for the stormwater retention pond to become overgrown and it will most likely take many years before it will look like a healthy established marsh system. (See attached photo)
As far as what vegetation future residents should expect; grasses and sedges mostly. If we get lucky, there may be some natural recruitment of beneficial, herbaceous species like pickerelweed, duck potato and rushes. The attached picture is an optimistic example of what the pond might look like in 4 to 5 years’ time. It would be ill advised to make the claim that the stormwater pond will ever look like a lake.
The only other options are to pay for the dead, dying and decomposing vegetation to be removed by hand. Doing so will encourage the spread of untreated grasses into those areas. Another option would be to clear and re-grade the entire pond back to its original elevation using heavy machinery. At which point you could either plant the pond with native vegetation, nurture any beneficial species that recruit naturally or both. Either way, the pond will require constant maintenance to prevent invasive and woody species from taking over again.
As I already pointed out, it will be unrealistic for residents to expect it to ever look like an open-water type of pond; it’s simply too shallow. What residents should expect is that it will be a mixture of dead and living vegetation for many years to come.