Changes

#Post-construction

#Post-construction

Stages 1-3 and 5 of the LID construction process are fundamentally similar for all '''surface-level LID''' types (bioretention, bioswales, enhanced grass swales, permeable pavements, infiltration chambers, infiltration trenches, soakaways, etc.). To illustrate, STEP's recommended processes for excavation do not differ depending on the practice type. Excavation is excavation, whether it is for a bioretention garden or a permeable pavement parking lot. On the other hand, stage 4 sub-tasks will vary substantially from practice to practice, as do some sub-tasks in stage 3. The following gives a brief explanation of each over-arching stage and links to the pages dedicated to each construction stage.  

Stages 1-3 and 5 of the LID construction process are fundamentally similar for all '''surface-level LID''' types (bioretention, bioswales, enhanced grass swales, permeable pavements, infiltration chambers, infiltration trenches, soakaways, etc.). To illustrate, STEP's recommended processes for excavation do not differ depending on the practice type. Excavation is excavation, whether it is for a bioretention garden or a permeable pavement parking lot. On the other hand, stage 4 sub-tasks will vary substantially from LID type to LID type, as do some sub-tasks in stage 3. The following gives a brief explanation of each over-arching stage and links to the pages dedicated to each construction stage.

 

===Pre-construction===

===Pre-construction===

*final excavated grade and verification

*final excavated grade and verification

===Backfill granular, utilities, and pipes===

===Sub-surface components===

Many LID practices rely on sub-surface features--gravel storage reservoirs, liners, underdrains, monitoring wells, etc.--to function. The construction process for sub-surface components works from the ground up. While some LID practices include all the sub-surface components listed below, many designs do not include one or more of these layers. Also, permeable pavement types can have different construction requirements at this stage, mostly regarding compaction of sub-surface layers.  

Many LID practices rely on sub-surface features--gravel storage reservoirs, liners, underdrains, monitoring wells, etc.--to function. The construction process for sub-surface components works from the ground up. While some LID practices include all the sub-surface components listed below, most designs will not include one or more of these layers. Also, permeable pavement types can have different construction requirements at this stage, mostly regarding compaction of sub-surface layers.  

The '''backfill granular, utilities, and pipes / sub-surface components''' page gives guidance on:  

The '''backfill granular, utilities, and pipes / sub-surface components''' page gives guidance on:  

===Finishing grades and surface layer installation===

===Finishing grades and surface layer installation===

This construction stage differs between LID practice type.  

This construction stage differs between LID practice type. The finishing grades and surface layer installation page has guidance for vegetated LIDS (bioretention, bioswales, enhanced grass swales, and vegetated filter strips; can also include infiltration chambers/trenches/soakaways, depending on the design) and permeable pavements.

*soil media installation and soil amendment

*soil media installation and soil amendment

{| class="wikitable"

{| class="wikitable"

|+ tables, tables, i love tables

|+ Stage 4 guidance for vegetated LIDs and permeable pavements

|-

|-

!Bioretention, swales, exfiltration systems, <br>and infiltration chambers/trenches/soakaways

!LID practices with vegetated surfaces

!Permeable pavements

!Permeable pavements

|-

|-