Difference between revisions of "Open vegetated swale and filter strip materials specifications"
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<td>ASTM C-33 fine aggregate concrete sand</td> | <td>ASTM C-33 fine aggregate concrete sand</td> | ||
<td>0.02” to 0.04”</td> | <td>0.02” to 0.04”</td> | ||
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | + | ||
<td>Check Dam (pressure treated)</td> | <td>Check Dam (pressure treated)</td> | ||
<td>AWPA Standard C6</td> | <td>AWPA Standard C6</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | < | + | <td>Under-drain gravel</td> |
<td>per pre-cast manufacturer</td> | <td>per pre-cast manufacturer</td> | ||
<td>1.5” to 3.5”</td> | <td>1.5” to 3.5”</td> | ||
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
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<td>See local Standards and Specs</td> | <td>See local Standards and Specs</td> | ||
<td>n/a</td> | <td>n/a</td> | ||
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
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<td>per local criteria</td> | <td>per local criteria</td> | ||
<td>size per equirements based on 10- year design flow</td> | <td>size per equirements based on 10- year design flow</td> | ||
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
</table> | </table> | ||
Revision as of 21:05, 4 February 2013
Link to this table
| Parameter | pecification | Size | Notes |
|---|---|---|---|
| Dry swale soil | USCS; ML, SM, SC | n/a | soil with a higher percent organic content is preferred |
| Dry Swale sand | ASTM C-33 fine aggregate concrete sand | 0.02” to 0.04” | |
| Check Dam (pressure treated) | AWPA Standard C6 | 6” by 6” or 8” by 8” | do not coat with creosote; embed at least 3’ into side slopes |
| Check Dam (natural wood) | Black Locust, Red Mulberry, Cedars, Catalpa, White Oak, Chestnut Oak, Black Walnut | 6” to 12” diameter; notch as necessary | do not use the following, as these species have a predisposition towards rot: Ash, Beech, Birch, Elm, Hackberry, Hemlock, Hickories, Maples, Red and Black Oak, Pines, Poplar, Spruce, Sweetgum, Willow |
| Filter Strip sand/gravel pervious berm |
sand: per dry swale sand gravel; AASHTO M-43 |
sand: 0.02” to 0.04” gravel: 1/2” to 1” | Mix with approximately 25% loam soil to support grass cover crop; see Bioretention planting soil notes for more detail |
| Pea gravel diaphragm and curtain drain | ASTM D 448 | varies (No. 6) or (1/8” to 3/8”) | use clean bank-run gravel |
| Under-drain gravel | per pre-cast manufacturer | 1.5” to 3.5” | |
| Under-drain | ASTM D-1785 or AASHTO M-278 | 6” rigid Schedule 40 PVC | 3/8” perf. @ 6” o.c.; 4 holes per row |
| Geotextile | See local Standards and Specs | n/a | |
| Rip rap | per local criteria | size per equirements based on 10- year design flow |