HomeMy WebLinkAboutA_Declaration_of_Covenant_5.5.2023_v3U13001069
Permit Number: B22006654Approved By:Date:
MAINTENANCE INSTRUCTIONS FOR PERMEABLE PAVEMENT (NON-VEGETATED)
Your property contains an on-site BMP (best management practice) called “permeable pavement,”
which was installed to minimize the stormwater quantity and quality impacts of some or all of the paved surfaces on your property.
Permeable pavements reduce the amount of rainfall that becomes runoff by allowing water to seep
through the pavement into a free-draining gravel or sand bed, where it can be infiltrated into the
ground. This on-site BMP shall be maintained per Appendix A of the City of Renton’s Surface Water Design Manual.
Permeable Pavements
The type(s) of permeable pavement used on your property is (CHECK THE BOX(ES) THAT APPLY):
Porous concrete
Porous asphalt
Permeable pavers
Modular grid pavement
MAINTENANCE RESTRICTIONS
The area covered by permeable pavement as depicted by the site plan and design details must be
maintained as permeable pavement and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton.
INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES
•Permeable pavements must be inspected after one major storm each year to make sure it is
working properly. More frequent inspection is recommended.
•Prolonged ponding or standing water on the pavement surface is a sign that the system is
defective and may need to be replaced. If this occurs, contact the pavement installer or the City
of Renton for further instructions.
•A typical permeable pavement system has a life expectancy of approximately 25 years. To help
extend the useful life of the system, the surface of the permeable pavement should be keptclean, stable and free of leaves, debris, and sediment through regular sweeping or vacuum
sweeping. Aggregate fill in modular grid pavement may need periodic surface replenishment.
•The owner is responsible for the repair of all ruts, deformation, and/or broken paving grids orpavers.
•Modular grid pavement and permeable pavers filled with gravel or with gravel in the jointsmay need to be refilled periodically.
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MAINTENANCE INSTRUCTIONS FOR A PERFORATED PIPE
CONNECTION
Your property contains an on-site BMP (best management practice) called a “perforated pipe
connection,” which was installed to reduce the stormwater runoff impacts of some or all of the
impervious surface on your property.
A perforated pipe connection is a length of drainage conveyance pipe with holes in the bottom,
designed to “leak” runoff, conveyed by the pipe, into a gravel filled trench where it can be soaked into
the surrounding soil. The connection is intended to provide opportunity for infiltration of any runoff
that is being conveyed from an impervious surface (usually a roof) to a local drainage system such as a
ditch or roadway pipe system. This on-site BMP shall be maintained per Appendix A of the City of
Renton’s Surface Water Design Manual.
MAINTENANCE RESTRICTIONS
The size and composition of the perforated pipe connection as depicted by the site plan and
design details must be maintained and may not be changed without written approval from the
City of Renton or through a future development permit from the City of Renton.
The soil overtop of the perforated portion of the system must not be compacted or covered
with impervious materials.
RECORDING REQUIREMENT
These perforated pipe connection on-site BMP maintenance and operation instructions must be
recorded as an attachment to the required declaration of covenant and grant of easement per
Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of
these instructions is to explain to future property owners, the purpose of the BMP and how it must be
maintained and operated. These instructions are intended to be a minimum; the City of Renton may
require additional instructions based on site-specific conditions. See the City of Renton’s Surface
Water Design Manual website for additional information and updates.
TYPICAL PERFORATED PIPE CONNECTION FOR A SINGLE FAMILY RESIDENCE
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