dyzzypyxxy thanks for the advise. I have already built my elevated raised-bed garden box. Per your suggestion it is resting on five two-foot high legs. It is 16 square feet and about 6 inches high (designed it so that the sides can be easily replaced or added to).
I'm using the Square Foot Garden (by Mel Bartholomew) method to plant my vegetables and flowers. I found that this size box and elevated two feet I'm able to reach the center from any side.
The only thing not yet installed is the trellis - waiting to warm up a little.
By the time I read your post it had snowed so I wasn't able to photograph the grass,
but at this point it may not be necessary to identify the grass.
Philipwonel hope these two photos help you a little.
Again, thank you all for your ideas and suggestions . . . certainly more informative than my local "Garden Club" which seems to be more of a social club than a garden club - went to a meeting and nothing was discussed regarding any actual gardening. However, I did get some information regarding web pages to look into and where I can have the soil tested (had I decided to replace the grass and plant in the ground). I decided on a elevated raised-bed garden because last season I didn't notice any, or very little, weeds which hinted (to me, at least) that herbicides were probably used in the past, and I wish to grow organic vegetables.