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==Maintenance Agreements==
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{{alert|Permeable pavement can be an important tool for retention and detention of stormwater runoff. Permeable pavement may provide additional benefits, including reducing the need for de-icing chemicals, and providing a durable and aesthetically pleasing surface.|alert-success}}
Maintenance agreements should note which conventional parking lot maintenance tasks must be avoided (e.g., sanding, re-sealing, re-surfacing, power-washing). Signs should be posted on parking lots to indicate their stormwater function and special maintenance requirements.
 
<p>When permeable pavements are installed on private residential or commercial property, owners must understand routine maintenance requirements. These requirements can be enforced via a deed restriction, drainage easement, maintenance agreement, or other mechanism enforceable by the local authority to help ensure that the permeable pavement is maintained and continues functioning. The mechanism should, if possible, grant authority for local agencies to enter the property for inspection or corrective action.</p>
 
  
==Maintenance Inspections==
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==Maintenance and maintenance agreements==
Maintenance of permeable pavement reviews its condition and performance. A spring maintenance inspection is recommended and cleanup conducted as needed. The following are recommended annual maintenance inspection points for permeable pavements:
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[[File:Chesapeake Stormwater Network logo.jpg|150px|thumb|alt=Chesapeake stormwater Network logo|<font size=3>The Chesapeake Stormwater Network has developed [http://chesapeakestormwater.net/training-library/design-adaptations/stormwater-bmp-maintenance/ two videos] that illustrate inspection and maintenance of LID BMP practices, including permeable pavement. '''NOTE: These videos provide useful tips but should not be used for compliance with Minnesota permits.'''</font size>]]
*The drawdown rate should be measured at the observation well for three (3) days following a storm event in excess of 1/2 inch in depth. If standing water is still observed in the well after three days, this is a clear sign that subgrade soil clogging is a problem.
 
*Inspect the surface for evidence of sediment deposition, organic debris, staining or ponding that may indicate surface clogging. If any signs of clogging are noted, schedule a vacuum sweeper to remove deposited material. Then test sections using ASTM C1701 to ensure that the surface attains an infiltration rate of at least 10 in./hr.
 
*Inspect the structural integrity of the pavement surface, looking for signs of surface deterioration, such as slumping, cracking, spalling or broken pavers. Replace or repair affected areas as necessary.
 
*Check inlets, pretreatment cells and any flow diversion structures for sediment buildup and structural damage. Remove the sediment.
 
*Inspect the condition of the observation well and make sure it is capped.
 
*Inspect any contributing drainage area for any controllable sources of sediment or erosion.
 
  
[[category:BMP]]
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In addition to the design items previously mentioned, some key actions help ensure the long-term performance of permeable pavement during its operation life. The most frequently cited maintenance problem is surface clogging caused by organic matter and sediment, which can be reduced by the following measures:
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*Periodic Vacuuming – The pavement surface is the first line of defense in trapping and eliminating sediment that may otherwise enter the stone base and soil subgrade. The rate of sediment deposition should be monitored and vacuuming done at least two times per year. A typical vacuum cleaning schedule may include the end of winter (April) and after autumn leaf-fall (November). Maintenance records should be maintained by the owner. The vacuuming frequency should be adjusted according to the intensity of use and deposition rate on the permeable pavement surface. At least one pass should occur at the end of winter. Regenerative air vacuum sweepers are the suggested means for regular surface cleaning. For neglected surfaces (i.e., those with no surface cleaning over several years) true vacuum sweepers have the most efficient removal of debris and fine particulates when compared with regenerative air or mechanical sweepers. However, areas on steep slopes or near curbs may limit vacuum sweeper performance ([http://www.stormh2o.com/SW/articles/19790.aspx Brown] 2013). If a true vacuum sweeper is used on PICP the removed aggregate in the joints should be replaced with the same material.
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*Ongoing – Minimizing salt use or sand for de-icing and traction in the winter, keeping the landscaping areas well maintained and preventing soil from being washed onto the pavement helps increase its life. Less salt will be needed. However, such water should not be directed to irrigation uses.
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*Maintenance Agreements - Maintenance agreements should note which conventional parking lot maintenance tasks must be avoided (e.g., sanding, re-sealing, re-surfacing, power-washing). Signs should be posted on parking lots to indicate their stormwater function and special maintenance requirements. When permeable pavements are installed on private residential or commercial property, owners must understand routine maintenance requirements. These requirements can be enforced via a deed restriction, drainage easement, maintenance agreement, performance bond, letter of credit or other mechanism enforceable by the local authority to help ensure that the permeable pavement is maintained and continues functioning. The local authority should use this MIDS guideline to establish measurable performance criteria for enforcing maintenance procedures. The mechanism should, if possible, grant authority for local agencies to enter the property for inspection or corrective action.
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==Maintenance inspection and maintenance checklists==
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Inspection and maintenance checklists have not been developed for the Minnesota Stormwater manual. We anticipate developing these in 2018. Below are several links to checklists developed by other organizations.
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*[http://crwp.org/files/checklist_permeable_pavement.pdf Chagrin River Watershed Partners Permeable Pavement Inspection and Maintenance Checklist]
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*[http://www.franklintn.gov/home/showdocument?id=21845 City of Franklin, Tennessee Stormwater Division Permeable  Pavement  Inspection and Maintenance Checklist]
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*[http://www.franklintwpnj.org/home/showdocument?id=2606 Franklin Township, New Jersey, Permeable Pavement Maintenance Inspection Checklist]
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==Links to additional information==
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*[[file:Pervious Pavement Maintenance Guide_public use.pdf|Pervious Pavement Maintenance Guide]]. (Source:[http://www.rwmwd.org/ Ramsey-Washington Watershed District])
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*[[file:Grass Pavers Maintenance Guide public use.pdf|Grass Pavers Maintenance Guide]]. (Source:[http://www.rwmwd.org/ Ramsey-Washington Watershed District])
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*[https://multires.eos.ncsu.edu/stormwater-bae-ncsu-edu/wp-content/uploads/sites/11/2016/05/AG-588-23-w.pdf Maintaining Permeable Pavements]. North Carolina Cooperative Extension.
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*[http://www.perviouspavement.org/downloads/pervious_maintenance_operations_guide.pdf Pervious Concrete Pavement Maintenance and Operations Guide]. National Ready Mixed Concrete Association.
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<noinclude>
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==Related articles==
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*[[Overview for permeable pavement]]
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*[[Types of permeable pavement]]
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*[[Design criteria for permeable pavement]]
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*[[Construction specifications for permeable pavement]]
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<!--[[Construction observations for permeable pavement]]-->
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*[[Assessing the performance of permeable pavement]]
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*[[Operation and maintenance of permeable pavement]]
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*[[Calculating credits for permeable pavement]]
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<!--[[Cost-benefit considerations for permeable pavement]]-->
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*[[Case studies for permeable pavement]]
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*[[Green Infrastructure benefits of permeable pavement]]
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*[[Summary of permit requirements for infiltration]]
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*[[Permeable pavement photo gallery]]
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*[[Additional considerations for permeable pavement]]
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*[[Links for permeable pavement]]
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<!--*[[External resources for permeable pavement]]-->
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*[[References for permeable pavement]]
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<!--*[[Supporting material for permeable pavement]]-->
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*[[Fact sheets for permeable pavement]]
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*[[Requirements, recommendations and information for using permeable pavement BMPs in the MIDS calculator]]
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<!--#[[Permeable pavement credits]]-->
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[https://stormwater.pca.state.mn.us/index.php?title=Permeable_pavement Permeable pavement main page]
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[[category:operation and maintenance]]
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[[category:Permeable pavement]]
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</noinclude>

Revision as of 18:35, 25 September 2018

Green Infrastructure: Permeable pavement can be an important tool for retention and detention of stormwater runoff. Permeable pavement may provide additional benefits, including reducing the need for de-icing chemicals, and providing a durable and aesthetically pleasing surface.

Maintenance and maintenance agreements

Chesapeake stormwater Network logo
The Chesapeake Stormwater Network has developed two videos that illustrate inspection and maintenance of LID BMP practices, including permeable pavement. NOTE: These videos provide useful tips but should not be used for compliance with Minnesota permits.

In addition to the design items previously mentioned, some key actions help ensure the long-term performance of permeable pavement during its operation life. The most frequently cited maintenance problem is surface clogging caused by organic matter and sediment, which can be reduced by the following measures:

  • Periodic Vacuuming – The pavement surface is the first line of defense in trapping and eliminating sediment that may otherwise enter the stone base and soil subgrade. The rate of sediment deposition should be monitored and vacuuming done at least two times per year. A typical vacuum cleaning schedule may include the end of winter (April) and after autumn leaf-fall (November). Maintenance records should be maintained by the owner. The vacuuming frequency should be adjusted according to the intensity of use and deposition rate on the permeable pavement surface. At least one pass should occur at the end of winter. Regenerative air vacuum sweepers are the suggested means for regular surface cleaning. For neglected surfaces (i.e., those with no surface cleaning over several years) true vacuum sweepers have the most efficient removal of debris and fine particulates when compared with regenerative air or mechanical sweepers. However, areas on steep slopes or near curbs may limit vacuum sweeper performance (Brown 2013). If a true vacuum sweeper is used on PICP the removed aggregate in the joints should be replaced with the same material.
  • Ongoing – Minimizing salt use or sand for de-icing and traction in the winter, keeping the landscaping areas well maintained and preventing soil from being washed onto the pavement helps increase its life. Less salt will be needed. However, such water should not be directed to irrigation uses.
  • Maintenance Agreements - Maintenance agreements should note which conventional parking lot maintenance tasks must be avoided (e.g., sanding, re-sealing, re-surfacing, power-washing). Signs should be posted on parking lots to indicate their stormwater function and special maintenance requirements. When permeable pavements are installed on private residential or commercial property, owners must understand routine maintenance requirements. These requirements can be enforced via a deed restriction, drainage easement, maintenance agreement, performance bond, letter of credit or other mechanism enforceable by the local authority to help ensure that the permeable pavement is maintained and continues functioning. The local authority should use this MIDS guideline to establish measurable performance criteria for enforcing maintenance procedures. The mechanism should, if possible, grant authority for local agencies to enter the property for inspection or corrective action.

Maintenance inspection and maintenance checklists

Inspection and maintenance checklists have not been developed for the Minnesota Stormwater manual. We anticipate developing these in 2018. Below are several links to checklists developed by other organizations.

Links to additional information


Related articles

Permeable pavement main page