Typically you use very large earthmoving equipment to construct a 1-acre pond. You will therefore pay a decent "mobilization fee" for this equipment that will somehow be included in your pond construction invoice.
My advice would be to use that very efficient heavy equipment as much as possible while it is on location! For example, if you know the grade for the house, basement/storm shelter requirements, path for the driveway, etc., then at least do all of the "rough" work for that with the heavy equipment. Have the contractor scrape and stockpile your good topsoil. Then your finish grade and topsoil spreading for your landscaping can easily be accomplished by the much smaller equipment of typical home finishing contractors.
Beware, this approach (plus building a pond) will make it look like a ghastly WWI bombed out landscape on that corner of your property.
I like that you have some available watershed to the south and west of your pond. Shaping that watershed to send water to your pond should also be accomplished during your rough grading with the heavy equipment.
As soon as your pond is finished, you need to immediately plant your erosion-resistant landscaping species. You will have just paid a lot of money to create depth in your pond. A heavy rain on recently worked ground could easily erode 1-2' of soil into the bottom of your pond!
Your other problem will be tree leaves coming into your pond from your border trees to the north. A lot of leaf debris will create an organic muck on the bottom of your pond. This may add unwanted nutrients into your pond, and eventually also rob some depth.
If these trees are more than a row or two deep, then you could probably cut them back more than 15' from the edge of the pond and still barely notice the change when looking over the pond from your house on the opposite side. (The good news is that you can always cut trees later after you have observed the interaction of your pond with the landscape for one or two annual cycles.)
I agree with Theo on the cost of running airlines over distance compared to electrical lines. You will suffer some frictional pressure losses in your air lines with a flow rate sufficient to aerate a 1-acre pond. However, long electrical lines also would suffer a voltage drop due to the cumulative resistance over the long run of your conductors. Paying to go to a larger airline is usually significantly cheaper than paying for larger copper conductors!
Congrats on your property and new pond project. It should be fun to develop, and then even more fun later when enjoyed with your family!
