[/quote] Depending on the depth, fishing over it may be hazardous as springs can weaken the ice in those areas. The lake my family cabin property is on is spring fed and you need to be very careful when accessing until you get out over the first drop as there are springs along the shore than never fully freeze.
This is fact, you can often recognize where springs are especially in clear ice. They look like a clean, previously drilled hole but with spider web like appearance on the outside of the ring and smooth surface over the hole, instead of any ice chips from drilling. Also, some spring water does not contain dissolved oxygen which will not allow a fish to respirate.