Baseball for Gravel Pit proposal

I just have to get something out there:

The Land Conservancy of McHenry County is not for or against the proposal to build a baseball stadium in Woodstock in exhange for allowing the surrounding area to be mined for gravel. There have been implications in public meetings that TLC has some interest in the project - that is not accurate.

TLC's interest is in ensuring that the environmental resources on and around the property are safeguarded should the development project go forward.

There is a large, high quality wetland area in the center of the parcel. While the proponents say that they will take necessary steps to preserve the wetland, the history of gravel mining adjacent to wetlands is that the wetlands lose because of the changed hydrology (water flow) over and through the site.

The wetland is dependent upon groundwater flow through the surrounding porous soils. Building a baseball stadium will decrease the ability of water to infiltrate at this site, and has a good chance of reducing the flow of water through the ground into the wetland. It also has a good chance of increasing the surface water flow into the wetland, thus changing cool clean groundwater for warm, dirty surface water. The change is likely to mean that the wetland will be more susceptible to invasion by non-native, invasive plants like Phragmites australis, an invader that thrives in urban wetland because of its tolerance of poor water quality and salt.

Now, don't get me wrong, gravel pits can be reclaimed to become lovely conservation areas such as MCCD's The Hollows and Lake County Forest Preserve District's Independence Grove.

In this case, the proposed end use for the gravel pit area is a new County Fair Ground should the Fair Association have the funds needed to purchase the site from the gravel company after the mining is complete.

A question I have in that regard is this: if the gravel company digs down to within a foot of the seasonal high water table, will that leave enough of a separation between the water table and the ground surface for development of a fair ground facility? Or, will soil have to be brought in to increase the separation? And, if the mining will go within a foot of the seasonal high water table level, where will it be in relation to the record high water level? And, how will the water level change with the addition of a baseball stadium and large parking area?

These are not trivial concerns. As the answers emerge, I'll be sure to report back!!