No Pump, No Power, No Help from Me: How the Creek Fills Our Pond

Field note 260920 · September 20, 2026

Our pond gets much of its water from the North Fork of Belden Creek, and it gets there with no pump, no power, and no help from me. A siphon does the work.

It starts upstream, at a spot we call the dog wash, where an old small weir backs the creek into a pool. From there a pipe about four inches across runs down to the west end of the pond. The far end sits lower than the pool, and once that pipe is full of water, gravity takes over. It’s the kind of machine I like best: no motor to burn out, nothing to plug in.

The catch is the word "full." A siphon won't start with air in the line, and after a dry summer, the line is mostly air.

What has to go right

A siphon is fussy about four things:

• Enough creek. The intake has to stay underwater. When the creek drops too far, the siphon quits.

• A clear intake. Leaves, sticks, and silt all find their way in.

• No air. The pipe has to be one unbroken column of water. A loose cap, a leaky fitting, or a high spot in the line where air collects will break it.

• A low outlet. The pond end has to stay below the surface of the pool feeding it.

Filling it from the wrong end

The trick that makes our restart work came from the plumbing aisle. It's an inflatable plug made for clearing clogged sewer lines. You hook it to a garden hose and push it into the pipe. When the water comes on, the plug swells tight against the pipe wall, and a small jet squirts out its far end.

So I plug the bottom of the siphon line, at the pond, and fill it from there with the hose. The water climbs uphill inside the pipe, and the air has only one way out: the intake, up at the dog wash. That's where the burping happens. The intake gurgles and bubbles as the air works its way up and out.

When the bubbles stop at the intake, the line is full all the way up. That's the moment I've been waiting for.

Pulling the cork

Then I turn off the hose. With the water pressure gone, the plug loses its grip, and the weight of all that water in the line shoves it right out of the pipe. The siphon takes off with real vigor. That first rush usually flushes out the silt and debris that settled in the line while it sat.

This September, once the creek came up, it went exactly that way. The pond has been filling ever since.

Winter has its own problem

High water brings a different kind of trouble. In winter, the creek runs fast and frothy, with a lot of air mixed into the water. That air rides into the siphon and collects at the high point of the line. Eventually there's enough of it to break the siphon, and the flow stops.

If I plan ahead, I don't fight it. Before the winter flows arrive, I turn the intake 180 degrees so it points up and out of the water. The siphon gets the winter off. In spring, I turn the intake back down and go through the whole plug-and-hose routine again.

When it quits

If the flow goes weak or stops, I work down the same list, from the top: creek level, the intake, every fitting for an air leak, the high spots in the line, then the pond end. It's a patient person's job.

The only safety advice I'll offer is the obvious kind: stay out of fast water, mind the slick banks, and keep your hands away from an intake that's pulling hard.