Backfill gravel filter fabric weep holes and perforated pipe drainage details for retaining walls on Gresham OR hillside lots with heavy local clay soil here.
French drain perimeter weeping tile and footing drainage details for foundations on sloped Gresham OR hillside lots prone to wet winter saturation in clay soil.
Retaining wall design picks for Gresham OR hillside lots covering height limits drainage rebar spacing and footing depth in wet Pacific Northwest soils today.