Installing a Drainage System in Washington, including Seattle

Catch Basin Down Spout Drainage to On Site Drainage System

The Problem

Upon arriving on site Matvey Construction found a residential foundation with no drainage and signs of foundation settlement. After completing a re-bar scan and soil probing, re-bar was found in the footing, as well as glacial till and sandy sub-soil.

This is a typical problem that is known to cause foundation settlement, and if found early on, it can save money and stress. Matvey completed a geo-tech report and permit design.

The Solution

The solution to this problem was complete soil density testing. The client was supplied with a structural repair design permit set. A trench was set up for an entire 4-foot system. A complete 9 inch deep, by 5 inch diameter soil pit was made for a flow well system.

There was then a special inspection for a clean water flow test. 8 push piers were installed in areas where settlement occurred, then the structure was lifted and leveled. Next, movement monitors were installed and a 24-month monitoring chart was used to keep track of the installation results.

The Results

Two years later, there was zero movement as reported by the geo-tech tracking site. The wall was still level and plum. The homeowners were very happy to see that the crawl space was completely dry and the house was still 100% level during the following rain season.

Other Case Studies

Helical Pier Installation
Helical Tieback Installation
Push Pier Installation