replying to carmen, Iggy wrote:
Still try to make the neighbor see how much water is being wasted and even her
wasted money on constant grass mowing, which is probably twice (or more) as
often as everyone else. The cheapest and most permanent route is to replace
the affected sidewalk square(s) at, around me, $200 a square. However, now
that you and the Mason know of a water-runoff problem, it can be addressed.

If it's just 1 to 3 squares, the Mason can put in a store-bought French Drain,
Drainage Piping or self-made concrete collection trough that's covered by
gravel and wrapped in landscape fabric, to keep dirt from clogging the system.
After that, the Mason would install a drain pipe under the sidewalk and out to
the street through the street curb.

If you don't have a curb (pipes can go under sidewalk and drain onto grass
apron, if applicable) or any drain into the street is illegal. Then, you'll
have to ignore the plan above and have the Mason install an in-yard deep curb
or few inch deep gutter (depends on water saturation depth noticed) under the
fence to keep the water on her side or let it run into the street, as much as
possible. No guarantee, but hopefully it ensures only 1 square will ever be
affected and much more slowly.

The very final step or possible option is to pay a Landscaper to put a swale
(or the gutter) in her yard only, with her written and signed consent. So, the
water only affects her sidewalk. There are options and you may have to
ultimately resort to digging under the fence a couple of feet and continuing
the yard curb, gutter or dumping in heavy clay soil along the entire adjoining
property line.

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