Pond dredging in Boise, Idaho

Pond dredging in Boise is for the pond owner who says, "It used to be three feet deep. Now I can see the bottom from the patio, and it smells like rotten eggs in August." Dredging means taking out the thick layer of muck that builds up on the bottom over the years, so the pond gets its depth back and stops feeding algae.

I'm Kabe Hockema, and I've been doing landscape and pond work in the Treasure Valley since 2012. My dredging work focuses on residential ponds: lined backyard ponds, koi ponds, and ornamental ponds on larger lots. This page explains what muck does, how I take it out, and how to slow it down afterward. All of my pond services are on the pond contractor page.

Dredging compared to a regular cleaning

A yearly pond cleaning handles the normal stuff: rinsing the rocks, cleaning the filter, and clearing the thin layer of debris from the past year. Dredging is the heavier job. When a pond goes years without a clean-out, or was built without a skimmer, the bottom fills with a thick, black sludge. A hose and a pond vacuum won't move it. It has to be pumped and scooped out.

What muck does to a pond

• It makes the pond shallower. Fish lose the cool, deep water they need in summer and the deep zone they rest in below the ice in winter.
• It uses up oxygen. Rotting leaves and waste use oxygen as they break down. In July, warm water already holds less oxygen, and fish end up gasping at the surface.
• It feeds algae. Muck releases nutrients back into the water all summer long.
• It smells. That rotten egg smell comes from gas building up in sludge with no oxygen in it.
• It buries the pump and plumbing. A pump sitting in muck clogs again and again.

Where the muck comes from in the Treasure Valley

Most of it is leaves. Cottonwoods, maples and ash drop a lot into ponds every fall, and our wind carries in more from the neighbors. Dust from dry summers settles into the water. Fish waste and dead plant leaves add to the pile every year. In Canyon County, ponds topped off with irrigation or ditch water can bring in fine silt with every fill. Grass clippings and fertilizer from the lawn add even more food for algae.

How I dredge a backyard pond

Fish come out first

I move the fish to an aerated holding tank filled with their own pond water, so they don't get shocked by a sudden change in temperature. Plants come out and wait in tubs in the shade.

Pump down and remove the sludge

I lower the water, then use a sludge pump built to move thick muck and small debris. Packed sediment comes out by hand with buckets and plastic tools. I keep metal shovels away from the liner, because one wrong jab turns a dredging job into a liner job.

Clean and inspect

With the bottom clear, I can see the liner, the gravel and the plumbing. I check for roots, settling and damage while it's open. If the liner is in rough shape, this is the time to talk about replacing it.

Refill and restart

I refill with water conditioner, add beneficial bacteria to restart the pond's natural balance, put the plants back, and let the fish back in once the water temperature is close to the holding tank.

Where the muck goes

Pond muck is full of nutrients. Many people like it spread thin on garden beds or mixed into a compost pile. If you'd rather not keep it, I can haul it away.

Keeping it from coming back

A pond that fills with muck is usually missing a skimmer, or has too little filtration for its size. A skimmer catches leaves at the surface before they sink, and adding one during a dredge is often the best long-term fix. Regular pond maintenance in spring and fall keeps the layer thin. If the pond's shape is part of the problem, such as a deep pit with no water moving through it, pond excavation can reshape it. Koi make a lot of waste, so if you keep them, my koi ponds page explains the filtration they need.

Best time of year to dredge

Early spring, before the water warms, or early fall, after the summer heat breaks. Cool water holds more oxygen, so fish handle the move better. I avoid midsummer, when fish stress fastest, and winter, when the ground and water are frozen.

What drives the cost

The cost of pond dredging comes from how deep the muck is, the size of the pond, how many fish need holding, access for hoses and wheelbarrows, whether the muck stays on site or gets hauled off, and upgrades like adding a skimmer. If you have a large earthen pond, call and describe it. Some of those need heavy equipment beyond what a landscape crew brings, and I'll tell you straight if it isn't a fit for me.

Areas I serve

I do pond dredging in Boise, Eagle, Meridian, Star, Kuna, Garden City, Nampa, Caldwell, Middleton and Hidden Springs, and in Sun Valley and Ketchum. I'm on every job, and you'll have my direct number.

If your pond has gotten shallow, smelly or green no matter what you try, schedule a consultation for pond dredging in Boise. I'll check how deep the muck is and tell you what it'll take to get your pond back.