Difference between revisions of "Typical maintenance problems and activities for infiltration practices"
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<th>Applicable Infiltration Practices<sup>1</sup></th> | <th>Applicable Infiltration Practices<sup>1</sup></th> | ||
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<td rowspan=2>''''Drainage Area and Drawdown Time''''</td> | <td rowspan=2>''''Drainage Area and Drawdown Time''''</td> | ||
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<td>1,2,3,4,5,6,7</td> | <td>1,2,3,4,5,6,7</td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<td>Erosion of catchment area contributing significant amount of sediment</td> | <td>Erosion of catchment area contributing significant amount of sediment</td> | ||
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<td>1,2,3,4,5,6</td> | <td>1,2,3,4,5,6</td> | ||
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<tr> | <tr> | ||
| − | <td rowspan=2>'''' | + | <td rowspan=2>''''Pretreatment''''</td> |
| − | <td> | + | <td>Pretreatment screens or sumps reach capacity</td> |
<td>Remove sediment and oil/grease from pretreatment devices/structures.</td> | <td>Remove sediment and oil/grease from pretreatment devices/structures.</td> | ||
<td>Minimum yearly or as per manufacturer's recommendations</td> | <td>Minimum yearly or as per manufacturer's recommendations</td> | ||
<td>1,2,3,4,5</td> | <td>1,2,3,4,5</td> | ||
</tr> | </tr> | ||
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<td>Vegetative filter strip failure</td> | <td>Vegetative filter strip failure</td> | ||
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<td>1,2,4,6</td> | <td>1,2,4,6</td> | ||
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<td rowspan=2>''''Site Erosion''''</td> | <td rowspan=2>''''Site Erosion''''</td> | ||
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<td>1,2,3,6</td> | <td>1,2,3,6</td> | ||
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<tr> | <tr> | ||
<td>Unexpected flow paths into practice</td> | <td>Unexpected flow paths into practice</td> | ||
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<td>1,2,3,6</td> | <td>1,2,3,6</td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<td rowspan=2>''''Vegetation'''''</td> | <td rowspan=2>''''Vegetation'''''</td> | ||
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<td>2,6,8</td> | <td>2,6,8</td> | ||
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<tr> | <tr> | ||
<td>Severe weed establishment</td> | <td>Severe weed establishment</td> | ||
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<td>2,6,8</td> | <td>2,6,8</td> | ||
</tr> | </tr> | ||
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</table> | </table> | ||
| − | <sup>1</sup> | + | <font size=1><sup>1</sup> |
#Infiltration Basin | #Infiltration Basin | ||
#Bioinfiltration Basin | #Bioinfiltration Basin | ||
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#Permeable Pavement | #Permeable Pavement | ||
#Tree Trench/Tree Box | #Tree Trench/Tree Box | ||
| − | + | </font size> | |
[[category:Table]] | [[category:Table]] | ||
Revision as of 12:49, 21 September 2016
Link to this table
| Inspection Focus | Common Maintenance Problems | Maintenance Activity | Recommended Maintenance Schedule | Applicable Infiltration Practices1 |
|---|---|---|---|---|
| 'Drainage Area and Drawdown Time' | Clogging, sediment deposition | Ensure that contributing catchment areas to practice, and inlets are clear of debris | Monthly | 1,2,3,4,5,6,7 |
| Erosion of catchment area contributing significant amount of sediment | In case of severely reduced drawdown time, scrape bottom of basin and remove sediment. Disc or otherwise aerate/scarify basin bottom. Dethatch if basin bottom is turf grass. Restore original design cross section or revise section to increase infiltration rate and restore with vegetation as necessary. | Upon identification of drawdown times longer than 48 hours or upon complete failure | 1,2,3,4,5,6 | |
| 'Pretreatment' | Pretreatment screens or sumps reach capacity | Remove sediment and oil/grease from pretreatment devices/structures. | Minimum yearly or as per manufacturer's recommendations | 1,2,3,4,5 |
| Vegetative filter strip failure | Reduce height of vegetative filter strip that may be limiting in‐flow. Re‐establish vegetation to prevent erosion. Leave practice off‐line until full reestablishment. | Mow grass filter strips monthly. Restore as necessary | 1,2,4,6 | |
| 'Site Erosion' | Scouring at inlets | Correct earthwork to promote non‐erosive flows that are evenly distributed | As necessary | 1,2,3,6 |
| Unexpected flow paths into practice | Correct earthwork to eliminate unepxected drainage or created additional stabile inlets as necessary | As necessary | 1,2,3,6 | |
| 'Vegetation | Reduced drawdown time damaging plants | Correct drainage issues as described above | Replace with appropriate plants after correction of drainage issues | 2,6,8 |
| Severe weed establishment | Limit the ability for noxious weed establishment by properly mowing, mulching or timely herbicide or handweeding. Refer to the MDA Noxious Weed List | Bi‐Monthly April through October | 2,6,8 |
1
- Infiltration Basin
- Bioinfiltration Basin
- Infiltration Trench
- Dry Well
- Underground Infiltration
- Dry Swale with Check Dams
- Permeable Pavement
- Tree Trench/Tree Box