Upon researching the North College Avenue Town of Herman boat ramp in Wisconsin, it appears that there is limited information available online. However, based on sources such as Google Maps and satellite images, it appears to be a standard concrete boat ramp with a single lane. The width of the ramp is not readily available, but it seems to be wide enough to accommodate medium-sized boats.

The body of water that the North College Avenue Town of Herman boat ramp services is not explicitly specified, but based on its location, it is likely the Sheboygan River. This river flows through Sheboygan County and into Lake Michigan.

As for the kind of craft permitted on the water, it would depend on any regulations or restrictions put in place by the local authorities. It is recommended to check with the Town of Herman or the Wisconsin Department of Natural Resources for any specific information regarding boating regulations on the Sheboygan River.

Overall, while there is limited information available about the North College Avenue Town of Herman boat ramp, it appears to be a standard concrete ramp servicing the Sheboygan River, with the specific regulations for watercraft use unknown.