Changes

#Post-construction

#Post-construction

Stages 1-3 and 5 of the LID construction process are fundamentally similar for all '''surface-level LID''' types. 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 paver 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 paragraphs give a brief explanation of each over-arching 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, 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 paver 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 section gives a brief explanation of each over-arching stage and links to the.  

===Pre-construction===

===Pre-construction===

Pre-construction activities set the stage for the successful construction of '''an LID''' practice. The pre-construction page gives guidance on:  

Pre-construction activities set the stage for the successful construction of '''an LID''' practice. The pre-construction page gives guidance on:  

*design verification and site walk-through

*design verification and site walk-through

*tendering and contract

*tendering and contract

*communication, inspection plan, and utilities coordination

*communication, inspection plan, and utilities coordination

*Erosion and sediment control measures

*erosion and sediment control measures

*mobilization, access, staging, and perimeter controls

*mobilization, access, staging, and perimeter controls

    

    

===Excavation and grading===  

===Excavation and grading===  

Excavation and grading are necessary for installing LID practices with sub-surface components, re-grading land to hold more water, and re-routing overland flow routes into the LID practice in question. The excavation and grading page gives guidance on:  

Excavation and grading are necessary for installing LID practices with sub-surface components, re-grading land to hold more water, and re-routing overland flow routes into an LID practice. The excavation and grading page gives guidance on:  

*clearing and grubbing

*clearing and grubbing

*excavation and rough grade

*excavation and rough grade

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

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

Many LID practices rely on sub-surface features--storage reservoirs, liners, underdrains, etc.--to function. The '''backfill granular, utilities, and pipes / sub-surface components''' page gives guidance on:

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.

*geotextile (if applicable)

 

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

 

*geotextile

*underdrain

*underdrain

*impermeable liners

*impermeable liners

*monitoring wells

*monitoring wells

*storage reservoir

*storage reservoir

*stone choker layer

*stone choker layer

*curbing

*curbing

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

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

This construction stage differs given the LID practice type.  

This construction stage differs between LID practice type.  

*soil media installation and soil amendment

*soil media installation and soil amendment

*as-built survey

*as-built survey