Today I took a stroll up to the Lilly Lake Subdivision to discover what had come of last week’s events. I knew that on Friday there had been activity on site, but I didn’t feel like popping my head into an active construction site, one that my actions may have precipitated. It seems that the construction company has fixed the giant hole in their sediment fencing by adding several more layers. Sections of the fence now are 4 layers thick. In addition, a wall of boulders was constructed at the outlet of a giant erosion scar. It will be interesting to see if even they can hold the water back. (more…)
Today I received word from City Councillor Henry Clarke stating that a sediment fence had failed on the site of the Lilly Lake Subdivision and that as he wrote the email they were working to repair it. With another rain storm headed our way I decided to go up and have a look at the work as it was being completed. I walked up the Jackson Creek Trail through the park. As I walked along the trail I noticed that giant sheets of mud had been left next to the trail from all of the water that had flowed through the site.
I ascended the slope out of the river valley to notice the first spot where the erosion fencing had failed. Across the huge swath of property there was nothing but bare soil. No erosion control had been implemented on site.
I continued further along the southern boundary of the property, the mud was thick and deep, more than once I stumbled and fell. Just as I was about to leave, I noticed where a huge swath of grass leading into the river valley had been washed out by water. I approached and discovered one of the largest erosion scars that I have ever seen.
The silt fencing had totally failed and you could see that possibly hundreds of tonnes of sediment had escaped the property and flowed down the valley into Jackson Creek.
I’m disappointed that this hasn’t been dealt with. Fish are currently spawning and this could lead to a massive kill of the eggs this year. In the mud I didn’t see any evidence that any humans had actually investigated since the last storm. I’ll be taking more action in the coming days and I’ll be sure to keep you posted.
This past week my partner alerted me to the fact that things in Jackson Creek looked a little off. “Like chocolate milk” is how she described it. I’ve seen rivers that looked like chocolate milk before, but never Jackson Creek. I decided to go have a look to see what was causing the phenomenon. First I went down to the creek near the entrance into Jackson Park. Indeed the water was murky with silt and mud.
Murky water like this is bad for fish and other aquatic organisms. It can suffocate fish, decrease light reaching into the water to allow plants to grow and can mean increased nutrients will lead to algae blooms and decreased oxygen concentrations.
After discovering the milky water that had found its way into creek I wanted to see what the water looked like upstream of any housing developments. I drove outside of town to see what the water looked like where the river crosses under Ackinson Road.
Sure enough the water was clear and crisp. Some tannins were in the water that gave the water a “tea like” appearance. This is a natural phenomenon and no immediate cause for concern. It was obvious that there was something along the banks of Jackson Creek that was causing the pollution in the area.
Flowing into a small tributary along the North side of the housing development on Lilly Lake road was one of the most egregious cases of poor sediment control. Along the slopes of the new construction, huge gullies of sediment had been carved out of the embankments and sediment was pouring into a failed stormwater pond to be deposited in Jackson Creek.
I’m not sure what how to fix this situation, city council is consistently unwilling to take action on these issues, Peterborough is home to several failed stormwater ponds. And it seems like the problem is not getting better any time soon. Perhaps a new city council will be willing to make the changes required to ensure the continued health and wellbeing of our waterways, and ultimately our community as a whole.