The significance of ‘wet ponds’ at the new County Public Works Facility

There has been a lot of questioning and concerns expressed as to the “pretty ponds” at the new County Public Works Facility.

There has been a lot of questioning and concerns expressed as to the “pretty ponds” at the new County Public Works Facility.

To explain the significance of “wet ponds,” Rick Green, director of engineering for the county said, “As part of the regulatory approvals required for subdivision and site developments, designs are required to take into account changes to the storm water runoff in both quantity and quality.”

This makes storm ponds significant and they are commonly used as a method of detaining flow and improving water quality before release to the natural environment.

“Generally, run-off from newly developed sites and subdivisions are required to be released at rates the same or slower than what was in place pre-development,” Green added. “The addition of hard surfaced roads, graveled sites and buildings increase the rate at which water runs off the site and depending on the site use, contaminants may be present on the runoff that require removal.”

According to Green, the entire site is graded to drain into a storm pond often with the exception of small landscaped buffers on the perimeter which maybe by design a “dry” or “wet” pond.

“The size of the ponds are generally designed to account for volumes associated with major storm events,” Green explained. “A dry pond, as we installed in Erskine East Subdivision, will generally detain runoff flow for a short period of time before controlled release to the natural overland drainage routes. These “dry” ponds are often grassed and can act as park space as they do not maintain normal water levels.”

In comparison, Green said that a “wet” pond, as constructed at the new Public Works Facility site is designed to maintain a certain level of water full-time, and provides surge storage for major storm events before controlled release to the natural overland drainage routes.

Explaining the significance of storm ponds further, Green said that ponds are also designed to clean the runoff by introducing the runoff in one end and releasing from the other.

“The wet ponds are designed with cells that allow water levels to build up and overflow between cells,” Green stated. “The contaminants will settle in the upstream cells providing for improved water quality as the runoff water leaves the site. The “wet” ponds can also provide for natural habitat for wetland vegetation and associated species which also serve to assist in the cleaning process of the water as it travels through the pond system.”

 

Just Posted

Spectacular Light Up at the Gendre Farm will dazzle the whole family

Annual Light Up near Erskine set for Dec. 13th

Alberta RCMP prepares for National Impaired Driving Enforcement Day and shares safety tips

National Impaired Driving Enforcement Day is a nationwide RCMP initiative taking place Dec.7th

County of Stettler balks at costs of Province’s modified policing model as local budget talks continue

Rural municipalities responsible for policing costs; upwards of $200 M

Lacombe Rams Senior Boys rout Stettler 86-53

Guard Jared Gamble leads all scorers with 34 points

Lacombe Rams Senior Girls bust Stettler zone on way to 63-35 win

Rams finding right mix between youth, veterans

Fashion Fridays: Ethical and sustainable gifts for the season

Kim XO, helps to keep you looking good on Fashion Fridays on the Black Press Media Network

Man accused in toddler son’s death inept parent, not murderer: defence

Toddler’s body was found outside Good Shepherd Anglican Church in April 2017

Job numbers disappointing, but oil and gas growth expected in 2020: Kenney

Unemployment rate in Alberta rose to 7.2 per cent from 6.7 per cent last month

‘Things haven’t changed enough:’ Ecole Polytechnique anniversary prompts reflection

Fourteen women were fatally shot by a gunman at the Montreal school on Dec. 6, 1989

Feds approve Alberta’s carbon tax on big industrial emitters

Tax will be applied on 10 per cent of emissions produced by the province’s biggest polluters

Appeal denied: Alberta’s top court upholds conviction of triple-murderer

Douglas Garland was convicted of first-degree murder in the deaths of a couple and their grandson

Second warning on romaine lettuce from California region as another E. coli case reported

Two cases of E. coli have been reported in relation to the illness in the U.S.

Many of Canada’s working poor can’t afford lawyers, don’t qualify for legal aid

One lawyer says many people earn too much to qualify for legal aid, but not enough to really live on

Economy lost 71,200 jobs in November, unemployment rate climbs to 5.9%

Jobless rate is at its highest since August 2018, when it hit 6%

Most Read