you mentioned engineering. does that include a permit from the corp of engineers? that part of the "engineering" could be the pricey part.
i would think at that cost it would include a quick temporary grass, permanent grass, fertilized, and hay blown on it.
i wouldnt skimp on the pond slopes. you sure want to make sure that all areas are easy to mow where you plan to have grass.
i have had 2 built in the last 8 years. neither have completely suited me when complete, especially when it came to the areas above water. the more time spent grading and dressing can really save you money in the long run. trying to grass areas that are too steep and constantly eroding when it rains gets costly and aggravating.
i like an area 15-20 ft wide all the way around the pond that is only about 1 ft above full pool. it sure makes it easier to mow and weed eat.
make sure underwater slopes are steep and deep enough to deter algae growth.
