Northland
Edgewater Dam Assessments
Project Overview
LDE conducted an independent geotechnical assessment of two 5m high earth dams in a recently formed subdivision. The principal purpose of the assessment was to review the stability of the dams.
The dams (upper and lower) were constructed in the late 1990s to control stormwater as part of the formation of the Northland subdivision.
An essential part of this project involved the review of historical data such as the original design, survey data, and discussions with personnel involved with the dam’s original construction. In addition to this information, comprehensive testing, analyses, and modelling helped to understand the nature of the site and form the appropriate recommendations and remediation design.
The assessment concluded with stability recommendations and a remediation design, comprising subsurface drainage — a deep filtered buttress drain with finger drains tapping zones of seepage — to improve long-term performance.
