Exfiltration trenches: Construction

Construction Tasks Described

Verification of Siting and LID Design
Installation of ESC and Construction Fencing
ESC Inspection and Maintenance (ongoing)
Clearing and Grubbing
Excavation
Rough Grade
Verification of Grading/Survey*
Scarification
Geotextile
Impermeable liner
Underdrain
Overflow or Overflow Drain
Monitoring well
Storage Reservoir
Stone Choker Layer
Curbing
Pre-treatment and Inlet
Soil Media / Filter Media
Finish Grading
Riprap (Large Stone)
Plant Material Verification and Installation
Mulch Placement
Stabilizing Contributing Drainage Area - Planting Adjacent Vegetation
As-built Survey
Permanent Fencing
Identify and Address Deficiencies
Assumption/Certification

Construction Mistakes to Avoid

Click below to review the following common construction-based mistakes to avoid:

Low Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting.

Filter fabric that is installed to separate dissimilar soils and provide runoff filtration and contaminant removal benefits while maintaining a suitable rate of flow; may be used to prevent fine-textured soil from entering a coarse granular bed, or to prevent coarse granular from being compressed into underlying finer-textured soils.

A perforated pipe used to assist the draining of soils.

a top dressing over vegetation beds that provides suppresses weeds and helps retain soil moisture in bioretention cells, stormwater planters and dry swales.