The Stevens Recorder

The Stevens Recorder

How it works:

A clock movement precisely advances a strip chart. At the same time, a float in contact with the water surface activates a marking stylus which reproduces the float's vertical movement on the strip chart. Stevens recorders do not need electricity or daily monitoring. Their charts become part of the legal record. Many are still in use throughout Boulder, although some have been replaced with digital or telemetry units.

The result:

Maximum water yield

Combining a Parshall flume with a recording device makes it possible to track each ditch's water use for an entire season. Today, we manage our water system for maximum efficiency with the help of these two inventions.

Every Boulder creek and ditch has at least one measuring and recording device today. Our water commissioner uses these measurements to figure out how to use every drop of water coming down Boulder Creek multiple times before it leaves our water district.

Right: A Stevens Recorder. Photo courtesy of Missouri Department of Natural Resources.

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