6.40 AM here, shortly after first daylight, and I have just returned from checking the results of last night's efforts on the Yellow Jacket nest.

After a stealthy approach, with LED light in the left hand, and the spray can (pointed in the right direction) in my right hand, I launched the attack at 11.03 local PDT. I sprayed the jet into the opening, and in about 30 seconds, several bees fell to the ground. I then saturated the nest, and then feeling really brave, I dislodged the nest from beneath the suspension insulator. Several bees flew out, but were dis-oriented, and flew off, who knows where.

This picture shows the inside of the nest, and the effectiveness of the spray. Problem solved.

Thanks to all who contacted me with your various solutions to the problem.

My abso favourite was the suggestion to pour a gallon of gas down the hole into the underground nest, then attach a 20 foot string to some rolled news paper, soak the end in gas, light it, and use the string to drag the flames over the hole, resulting in ignition, and the elimination of the bees. (and everything else)

This would also show up on the earthquake monitors through out North America, so I did not use this suggestion. I imagine a gallon of gas, ignited underground, would leave a fair sized crater.