Ward Construction provides services in the greater San Francisco Bay Area including, Oakland, Berkeley, Richmond, San Francisco, Walnut Creek, Lafayette, Orinda, Moraga, Hayward, Marin and other East Bay and North Bay cities.
Here’s an example of the type of services provided:
e will construct a drainage system along the right, front, and rear sides of the residence. The system will be comprised of 2 separate legs, each starting near the center of the right side with a trench 6-1/2 feet deep. From here 1 leg will extend along the right side to the right rear corner, then along the rear to the left rear corner. The second leg will extend along the right side to the right front corner, then continue along the front to the front left corner. The system will maintain a depth lower than the adjacent sub-area or basement where water has previously shown up.
The drainage system consists of two pipes in a rock filled trench. One is perforated, to collect sub-surface water and the other is non-perforated, to collect water from the roof downspouts. At the upper end or start of both lines, as well as at the major corners, a clean-out will be provided so that both lines can be tested or cleaned as necessary.
The minimum depth for the perforated pipe will be below the grade of the soil under the house adjacent the system and both the perforated and non-perforated pipe will fall at least 1/8 inch per foot for the total length of the system to the point of discharge.
The perforated pipe will be installed on top of a bed of gravel, two inches deep, with the perforations pointed down. The trench will then be then backfilled with drain rock. The rock we recommend is Class I, Permeable Type A drain rock per the California State Specifications. The drain rock is clean gravel that varies in size from 1/4 to 1/2 inch.
The trench will be a minimum of 12 inches wide. This permits a four inch blanket of rock on each side of the four inch perforated pipe.
The rear portion of the system will discharge across the left side to the left front corner to meet the front side system, then beneath the driveway and down the slope to the school driveway. From here the system will continue down the left side of the school driveway to the street. We will remove and replace a strip of asphalt.
We will patch the asphalt driveway where it is trenched across. The patch will be just that, “a patch”, and it will be evident that there once was a trench crossing the driveway. We will carefully blend it in, but you should be aware that it will be visible.
We will remove and replace a strip of the public walk and excavate a shallow trench from the water meter box to the drainage discharge trench to facilitate the new water service line. We will remove and replace a strip of bricks along the right and front sides of the house, and across the driveway as necessary to install the drain, we will probably not be able to match the bricks exactly.
