BMP Monitoring Sites - Urban Drainage and Flood Control District
BMP Monitoring Sites - Urban Drainage and Flood Control District BMP Monitoring Sites - Urban Drainage and Flood Control District
UDFCD BMP MONITORING SITES Permeable Interlocking Concrete Pavement Typical Details 18" RCP @ 1.0% 25' SAMPLING EQUIPMENT BOX CONDUIT INLETS: 3.5' x 2.0' TRADITIONAL ASPHALT PAVEMENT 20.0' 5.0' 20.0' TEMPORARY ORANGE FENCE 92.0' COBBLESTONE BLOCK PAVEMENT Permeable Interlocking Concrete Pavement Plan Base Course: AASHTO #67, all fractured faces; (CDOT SECT. 703, #67 course aggregate) In-fill and leveling course: AASHTO crushed #8 (CDOT sect. 703, #8 course aggregate), all fractured faces Cobblestone blocks with at least 8% surface area open 3.125" 2.0" 7.0" 1.0" 6.0" Wrap all geotextile fabric and impermeable liner to top of cobble block. Attach to wall or side of trench securely. 1" Thick sand cushion layer Note: Extend geotextile fabric and minimum of 18" beyond trench Woven geotextile fabric meeting: ASTM D4751 - AOS U.S. STD. sieve #50 to #70 ASTM D4633 - Min. trapezoidal tear strength 100 X 60 lbs, Minimum COE specified open area of 4% Fill under-drain trench around pipe with AASHTO #67 stone Schedule 40 HDPE Perforated 4" Under-drain 16 mil impermeable liner under all pavement wrapped to top of pavement ASTM C-33 Sand Permeable Interlocking Concrete Pavement Section
UDFCD BMP MONITORING SITES Permeable Interlocking Concrete Pavement Installation Guidelines Select Blocks Select PICP blocks that have 8% open area or more. Follow manufacturer’s installation instructions, except that infill and base course materials and dimensions specified in this section shall be strictly adhered to. Infill Materials and The PICP openings shall be filled with AASHTO #8 Leveling Course fractured aggregate and shall be placed on a one-inch thick leveling course of same #8 aggregate. Base Course The base course shall be AASHTO #67 coarse aggregate; all fractured surfaces. For volume calculations assume 30% of total volume to be open pore space. Unless an underdrain is provided, at least 6 inches of the subgrade underlying the base course shall be sandy and gravelly material with no more than 10% clay fraction. Sand Filter Layer The sand filter layer shall be ASTM C-33 sand and will be installed under the base course and above the underdrain trench when one is used. Geotextile Fabric Place a woven geotextile fabric on top and bottom of the base course. Use a geotextile material that meets the following requirements: o ASTM D-4751 – AOS U.S. Std. Sieve #50 to #70 o D-4633 – Trapezoidal tear strength ≥ 100 x 60 lbs o COE specified minimum open area ≥ 4% Impermeable Liner When expansive or NRCS Type D soils are present, or potential for groundwater contamination exists, install a 16 mil thick impermeable liner on the bottom and sides of the basin under the pavement. If soils are not expansive (i.e. NRCS Type A, B or C), use a woven geotextile material that meets the requirements specified
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UDFCD <strong>BMP</strong> MONITORING SITES<br />
Permeable Interlocking Concrete Pavement<br />
Typical Details<br />
18" RCP<br />
@ 1.0%<br />
25'<br />
SAMPLING<br />
EQUIPMENT BOX<br />
CONDUIT<br />
INLETS:<br />
3.5' x 2.0'<br />
TRADITIONAL<br />
ASPHALT<br />
PAVEMENT<br />
20.0'<br />
5.0'<br />
20.0'<br />
TEMPORARY ORANGE FENCE<br />
92.0'<br />
COBBLESTONE<br />
BLOCK<br />
PAVEMENT<br />
Permeable Interlocking Concrete Pavement Plan<br />
Base Course: AASHTO #67, all fractured faces;<br />
(CDOT SECT. 703, #67 course aggregate)<br />
In-fill <strong>and</strong> leveling course: AASHTO crushed #8 (CDOT<br />
sect. 703, #8 course aggregate), all fractured faces<br />
Cobblestone blocks with at<br />
least 8% surface area open<br />
3.125"<br />
2.0"<br />
7.0"<br />
1.0"<br />
6.0"<br />
Wrap all geotextile<br />
fabric <strong>and</strong> impermeable<br />
liner to top of cobble<br />
block. Attach to wall or<br />
side of trench securely.<br />
1" Thick s<strong>and</strong><br />
cushion layer<br />
Note: Extend<br />
geotextile fabric<br />
<strong>and</strong> minimum of<br />
18" beyond trench<br />
Woven geotextile fabric meeting:<br />
ASTM D4751 - AOS U.S. STD. sieve #50 to #70<br />
ASTM D4633 - Min. trapezoidal tear strength 100 X 60 lbs,<br />
Minimum COE specified open area of 4%<br />
Fill under-drain trench<br />
around pipe with<br />
AASHTO #67 stone<br />
Schedule 40 HDPE<br />
Perforated 4" Under-drain<br />
16 mil impermeable liner<br />
under all pavement wrapped<br />
to top of pavement<br />
ASTM C-33 S<strong>and</strong><br />
Permeable Interlocking Concrete Pavement Section
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