Changes

==Materials checklist==  

==Materials checklist==  

#Verify that porous bituminous asphalt, if proposed, is specified on the plans as meeting the following specifications: [Section 4.2.4, 2]

#Verify that porous bituminous asphalt, if proposed, is specified on the plans as meeting the following specifications:

##Bituminous surface must be laid with a bituminous mix of 5.75% to 6% by weight dry aggregate.

##Bituminous surface must be laid with a bituminous mix of 5.75% to 6% by weight dry aggregate.

##In accordance with American Society of Testing and Materials (ASTM) D6390, drain down of the binder must be no greater than 0.3%.

##In accordance with American Society of Testing and Materials (ASTM) D6390, drain down of the binder must be no greater than 0.3%.

Verify that permeable paver and grid systems, if proposed, are specified on the plans as meeting the following specifications: [Section 4.2.4, 4]

Verify that permeable paver and grid systems, if proposed, are specified on the plans as meeting the following specifications:  

#Permeable paver and grid systems must conform to manufacturer specifications.

#Permeable paver and grid systems must conform to manufacturer specifications.

#The systems must have a minimum flow through rate of five inches per hour and a void percentage of no less than 10%.

#The systems must have a minimum flow through rate of five inches per hour and a void percentage of no less than 10%.

#Gravel used in interlocking concrete pavers or plastic grid systems must be well-graded and washed to ensure permeability.

#Gravel used in interlocking concrete pavers or plastic grid systems must be well-graded and washed to ensure permeability.

#Verify that stone designed for stormwater storage, if proposed, is specified on the plans as being uniformly graded, crushed, clean-washed stone and that it is noted that PWD defines “clean-washed” as having less than 0.5% wash loss, by mass, when tested per the AASHTO T-11 wash loss test. AASHTO No. 3 and No. 57 stone can meet this specification. [Section 4.2.4, 6a]

#Verify that stone designed for stormwater storage, if proposed, is specified on the plans as being uniformly graded, crushed, clean-washed stone and that it is noted that PWD defines “clean-washed” as having less than 0.5% wash loss, by mass, when tested per the AASHTO T-11 wash loss test. AASHTO No. 3 and No. 57 stone can meet this specification.

#Verify that all aggregates used within a porous pavement system meets the following requirements: [Section 4.2.4, 6b]

#Verify that all aggregates used within a porous pavement system meets the following requirements:  

 

Maximum wash loss: 0.5% per AASHTO T-11

Maximum wash loss: 0.5% per AASHTO T-11

Minimum durability index: 35 per ASTM D3744

Minimum durability index: 35 per ASTM D3744

Maximum abrasion: 10% for 100 revolutions and 50% for 500 revolutions per ASTM C131

Maximum abrasion: 10% for 100 revolutions and 50% for 500 revolutions per ASTM C131

Verify that all choker course aggregate meets the specifications of AASHTO No. 57 and meets the gradation listed in Table 4.2-3 of the Manual. [Section 4.2.4, 6c]

Verify that all choker course aggregate meets the specifications of AASHTO No. 57 and meets the gradation listed in Table 4.2-3 of the Manual.

Verify that sand, if proposed, is specified on the plans to be AASHTO M-6 or ASTM C-33 sand and to have a grain size of 0.02 inches to 0.04 inches. [Section 4.2.4, 7]

Verify that sand, if proposed, is specified on the plans to be AASHTO M-6 or ASTM C-33 sand and to have a grain size of 0.02 inches to 0.04 inches.  

Verify that storage chambers for porous pavement structural SMPs, if proposed, are specified on the plans as meeting the following specifications: [Section 4.2.4, 8]

Verify that storage chambers for porous pavement structural SMPs, if proposed, are specified on the plans as meeting the following specifications:  

Pipe used within a subsurface infiltration SMP must be continuously perforated and have a smooth interior with a minimum inner diameter of four inches.

Pipe used within a subsurface infiltration SMP must be continuously perforated and have a smooth interior with a minimum inner diameter of four inches.

High-density polyethylene (HDPE) pipe, if proposed, must meet the specifications of AASHTO M252, Type S or AASHTO M294, Type S.

High-density polyethylene (HDPE) pipe, if proposed, must meet the specifications of AASHTO M252, Type S or AASHTO M294, Type S.

UV Resistance after 500 hrs (ASTM-D4355): ≥ 70%

UV Resistance after 500 hrs (ASTM-D4355): ≥ 70%

Heat-set or heat-calendared fabrics are not permitted

Heat-set or heat-calendared fabrics are not permitted

Verify that underdrains, if proposed, are made of continuously perforated HDPE plastic piping with a smooth interior and a minimum inner diameter of four inches. HDPE pipe must be specified on the plans to meet the specifications of AASHTO M252, Type S or AASHTO M294, Type S. [Section 4.2.4, 10]

Verify that underdrains, if proposed, are made of continuously perforated HDPE plastic piping with a smooth interior and a minimum inner diameter of four inches. HDPE pipe must be specified on the plans to meet the specifications of AASHTO M252, Type S or AASHTO M294, Type S.  

Verify that observation wells are specified on the plans as consisting of perforated plastic pipe with a minimum inner diameter of six inches. [Section 4.2.4, 12]

Verify that observation wells are specified on the plans as consisting of perforated plastic pipe with a minimum inner diameter of six inches.

Verify that cleanouts are made of rigid material with a smooth interior having a minimum inner diameter of four inches. [Section 4.2.4, 13]

Verify that cleanouts are made of rigid material with a smooth interior having a minimum inner diameter of four inches.