My house in Indiana was built in about 1900 and has a cistern full of water in the backyard. It's accessible by a manhole cover and, as far as we can tell, hasn't been used in many years. We have two issues:

1. It's dangerous, as we have a toddler and the cover is not secure.

2. We'd like to use the water instead of just letting it sit there, but aren't sure how best to use it. We'd love to get some suggestions.

Thanks so much!