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2. This Drain Mistake Could Be Costly - AOL

   www.aol.com/drain-mistake-could-costly-205600754...

   The national average cost of French drains is $9,250, according to Angi, a service that connects users with home and landscaping pros. Specifically, yard trench drains cost about $30 to $90 per ...

3. French drain - Wikipedia

   en.wikipedia.org/wiki/French_drain

   A diagram of a traditional French drain. A French drain [1] (also known by other names including trench drain, blind drain, [1] rubble drain, [1] and rock drain [1]) is a trench filled with gravel or rock, or both, with or without a perforated pipe that redirects surface water and groundwater away from an area.

4. Drainage equation - Wikipedia

   en.wikipedia.org/wiki/Drainage_equation

   A drainage equation is an equation describing the relation between depth and spacing of parallel subsurface drains, depth of the watertable, depth and hydraulic conductivity of the soils. It is used in drainage design. Parameters in Hooghoudt's drainage equation. A well known steady-state drainage

5. Trench drain - Wikipedia

   en.wikipedia.org/wiki/Trench_drain

   A person generally can go to a pre-caster or a distributor and buy 50 feet (15 m) of trench drain; the cost of the material to create the trench drains can be more expensive than simply using cast-in-place systems, however the money saved through installation, maintenance, and longevity heavily outweighs those costs.

6. My neighbor’s sump pump drains onto my property — now my yard ...

   www.aol.com/finance/neighbor-sump-pump-drains...

   Even if you’re able to get the cost of repairing your property covered, it’s not going to do you much good if your neighbor’s sump pump continues to drain directly onto your property.

7. Infiltration/Inflow - Wikipedia

   en.wikipedia.org/wiki/Infiltration/Inflow

   Infiltration will occur where local groundwater elevation is higher than the sewer pipe. Gravel bedding materials in sewer pipe trenches act as a French drain. Groundwater flows parallel to the sewer until it reaches the area of damaged pipe. In areas of low groundwater, sewage may exfiltrate into groundwater from a leaking sewer. [6]