Yesterday I met with some nice folks up in Hat Creek and Old Station. A big
question right now is, how do I comply with Water Board regulations? Also, what exactly do I need to do for a measuring device? And, where can I find out that what I do will be acceptable, so I don’t get dinged after I did what I was supposed to?
First: devices. The most common, long-lasting, and cost effective devices for measurement of irrigation diversions are: weirs, orifices, flumes, mag-meters, propeller meters, and acoustic Dopplers.
Weirs are
the least expensive, long-lasting, accurate devices. This weir was prefabricated and shipped from Briggs Manufacturing. Installation takes a few hours, and with new 2″ lumber, accuracy is plus or minus 5 %. That is better than the Water Board’s requirement of 10 % accuracy.

An orifice is often exactly the same as a weir, with the boards set as an orifice. Instead of the water going over, it goes through an exactly-sized hole. The accuracy is plus or minus 5 % if it is set up carefully. The cost is the same as for installing and operating a weir.

Here is another kind of orifice – a headgate. If it is a square headgate, or a new, round (Waterman) headgate, then the area of the opening can be determined with plus or minus 5% accuracy. An older headgate or one with a less-than-perfect opening can still be 10% accurate, within the Boards’s standards.

This is a Parshall flume. It uses no boards, so no debris can pile up. It is nearly maintenance-free. Flumes cost more to install, and if they settle and get out of level they lose accuracy. However, you’ll see many of these in Northern California. There are some prefabricated flumes just coming into production that will be easier to install and will include data collectors.
How do you know which one will work for a particular diversion? Someone with expertise can check the ditch, grade, soil-type, flow range, and other information and tell you within a couple of days what will work best, with an engineering report and cost estimate. Rights To Water Engineering does this for $300 to $500, and can install the device if you like, with an operations manual.
Filing Statements of Use with the Water Board is now all by computer through
the Internet. That’s one of the things Rights To Water Engineering, and some other folks do at a reasonable cost. If that’s your worry then contact us and we can point you in the right direction or help you out with reporting.
This is the quick summary on compliance! Contact me at (530) 526-0134 or RightsToWaterEng1@gmail.com, and read this blog for more detailed information. Have a great weekend!







. This looks like a data entry form, and allows you to search by water right type, status, ID, county, etc., and most relevant for finding your own, by Primary Owner. Whoops! I sure thought it was – it is now disabled. Maybe that’s temporary, but even a couple of weeks ago I was able to put in “California”, for example, and find the rights held by State agencies. As a matter of fact, none of the searches I am trying right now even list any results in the “Holder Name column.
If “you can’t get there from here”, then you can search by map, in the 

of two ways:







f the other drivers are speeding? We have all seen the answer – speeders eventually get pulled over by police or highway patrol, while those who stay close to the speed limit generally get left alone. I’ll bet that you’re like me- I am a lot more relaxed after driving within the limits, then if I put the pedal to the metal and get somewhere an hour earlier.

full water right, even though he thinks he is. In this case, being able to measure the water means being able to demonstrate that when the diversion is increased, it is still within the legal amount. I have seen this happen a few times, and the result is a rancher or farmer who is a whole lot happier than he or she was last week!

and while we were there were good showers in several parts of the valley.