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Water

What pressure regulator would be advised for residence with inlet pressure of around 310 psi - a regulator with max pressure of 300 or 400 psi? Read online: Oversizing a valve can create serious system problems, such as excessive wear, vibration, wire draw, and noise. Some installers/designers...

A potential construction project discovered 50 ft of uncertified fill. Folks wondering how that might affect project but that may be too general a question? What constitutes uncertified fill?

Please provide difference between the 2 fills. Also, general difference in ability of the 2 different fills to support building structures or various types of construction.

The homes are at the foothill of slopes (2 to 1 ratio). HOA covenants does not allow for change in drainage pattern or flow. If owner who elevates his back yard installs drain around yard to prevent cross lot drainage, would it be ok?

Supporse there are 4 homes at bottom of some slopes, 2 X 2 with backyards abuttin. If one owner wants to elevate his property 2 feet higher than the other 3 properties, would it be allowed (ie, get permits) as long as there are drainage systems installed that prevent. cross lot drainage, or...

Can a contractor who is licensed to do landscaping but not grading have his contractor license revoked if he does grading without permits in California?

I would like a rough idea of how the AREA of a drainage area for water flowing from a steep slope (2 to 1 ratio) would be calculated. Are there minimum area requirements that must be met for grading plans to be approved?

The water now drains to the back of each of the lots, ie. down the middle of the 4 lots that are situated 2x2.

Don't have topo! The 4 lots are pretty flat, the one lot is simply around 2 feet higher than the other 3 with the retaining wall and added soil. Question is what, if anything, can be done to preserve original drainage pattern

If there are 4 lots arranged 2 X 2 (each lot shares 2 sides with 2 contiguous lot) and one homeowner wants to build a retaining wall around 3 sides of his property (2 sides and the back of the property), then elevate his property by filling it with soil such that it is 2 feet higher than the...

I am part of a homeowner association with 20+ acres of land with hillsides graded roughly 2:1, separated by 2 to 3 levels of horizontal concrete drainage swales that collect slope runoff to vertical swales. Each side of the swale measures about 4 feet wide. Some work has started to fix LARGE...