THE SWM SHIELD
Our second Storm Water Management (SWM) product functions as a sediment forebay.Keeping more than 50% of sediment from entering the pond
HOW A SWM SHIELD WORKS
SWM Shields are placed in the forebay of a stormwater pond.
Using the same properties as our patented CB Shield, water must run across a series of grates before reaching a pond
Sediment falls between grates and fills the basin before water reaches the pond.
Water eventually spills over into the pond, but pollutants and sediment stay behind
What starts off nice
will need to be maintained
SWM Shields offer many advantages in maintenance when compared to a standard sediment pond
maintaining a standard pond vs swm shield
Steps to cleaning a pond:
1.Hire an engineer to survey the pond
2.Calculate volume to remove. Often over excavating by as much as 20%
3. Get required permits (may be as high as 7)
4. Contractor begins work, and may have to account for protecting fish in pond.
5. Deal with mess in surrounding neighbourhood
6. Account for complaints of nearby residents.
7. Restore damage done by construction equipment
Steps to cleaning a SWM pond:
1. Check sediment depth through 4" slots and manhole covers
2. Determine if sediment has reached the maximum depth of 1200mm (on average 3-5 years)
3. Drive vacuum truck beside SWM shield on access road
4. Remove manhole covers spaced every 8'
5. Decant water into pond
6. Truck away vacuumed sediment
When to install a swmshield?
SWM Shields can be placed in ponds at the initial excavation period, or as a retrofit.
We recommend that if you're already having to excavate to clean the pond out, dig a little deeper and put a SWM shield in the forebay while you're there
The install process
(Hover over photos for more details)
Other useful info...
Each SWM Shield "box" section is 8x10x8`
Each box should treat 4.2 hectares, so 10 boxes would treat 40 hectares
We currently have two SWM Sheilds installed for the Region of Peel