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− | + | <font size=3>'''Stormwater pond/wetland - construction inspection checklist.'''</font size><br> | |
− | <font size=3>'''Stormwater pond/ wetland - construction inspection checklist.'''</font size><br> | + | Link to this [[Stormwater pond/wetland - construction inspection checklist|table]]<br> |
− | Link to this [[Stormwater pond/ wetland - construction inspection checklist|table]] | + | To access an Excel version of form (for field use), click [[ Forms (including field inspection forms)|here]]. |
− | |||
<table class="sortable"> | <table class="sortable"> | ||
<tr> | <tr> | ||
Line 35: | Line 34: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Pipe and appurtenances on-site prior to construction and dimensions checked</td> | <td>Pipe and appurtenances on-site prior to construction and dimensions checked</td> | ||
Line 41: | Line 39: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>1. Material (including protective coating, if specified)</td> | <td>1. Material (including protective coating, if specified)</td> | ||
Line 47: | Line 44: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>2. Diameter</td> | <td>2. Diameter</td> | ||
Line 53: | Line 49: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>3. Dimensions of metal riser or pre-cast concrete outlet structure</td> | <td>3. Dimensions of metal riser or pre-cast concrete outlet structure</td> | ||
Line 59: | Line 54: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>4. Required dimensions between water control structures (orifices, weirs, etc.) are in accordance with approved plans</td> | <td>4. Required dimensions between water control structures (orifices, weirs, etc.) are in accordance with approved plans</td> | ||
Line 65: | Line 59: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>5. Barrel stub for prefabricated pipe structures at proper angle for design barrel slope</td> | <td>5. Barrel stub for prefabricated pipe structures at proper angle for design barrel slope</td> | ||
Line 71: | Line 64: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<td>6. Number and dimensions of prefabricated antiseep collars</td> | <td>6. Number and dimensions of prefabricated antiseep collars</td> | ||
Line 77: | Line 69: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<td>7. Watertight connectors and gaskets</td> | <td>7. Watertight connectors and gaskets</td> | ||
Line 83: | Line 74: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<td>8. Outlet drain valve</td> | <td>8. Outlet drain valve</td> | ||
Line 89: | Line 79: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<td>Project benchmark near pond site</td> | <td>Project benchmark near pond site</td> | ||
Line 95: | Line 84: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<td>Facility location staked out</td> | <td>Facility location staked out</td> | ||
Line 101: | Line 89: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<td>Equipment for temporary de-watering</td> | <td>Equipment for temporary de-watering</td> | ||
Line 107: | Line 94: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Temporary erosion and sediment control in place</td> | <td>Temporary erosion and sediment control in place</td> | ||
Line 113: | Line 99: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<th colspan=3>2. Subgrade Preparation</th> | <th colspan=3>2. Subgrade Preparation</th> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Area beneath embankment stripped of all vegetation, topsoil, and organic matter</td> | <td>Area beneath embankment stripped of all vegetation, topsoil, and organic matter</td> | ||
Line 126: | Line 110: | ||
<th colspan=3>3. Pipe Installation</th> | <th colspan=3>3. Pipe Installation</th> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<td>Method of installation detailed on plans</td> | <td>Method of installation detailed on plans</td> | ||
Line 132: | Line 115: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td colspan=3>A. Bed preparation</td> | <td colspan=3>A. Bed preparation</td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<td>Installation trench excavated with specified side slopes</td> | <td>Installation trench excavated with specified side slopes</td> | ||
Line 142: | Line 123: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Stable, uniform, dry subgrade of relatively impervious material (If subgrade is wet, contractor shall have defined steps before proceeding with installation)</td> | <td>Stable, uniform, dry subgrade of relatively impervious material (If subgrade is wet, contractor shall have defined steps before proceeding with installation)</td> | ||
Line 148: | Line 128: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<td>Invert at proper elevation and grade</td> | <td>Invert at proper elevation and grade</td> | ||
Line 154: | Line 133: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td colspan=3>B. Pipe placement</td> | <td colspan=3>B. Pipe placement</td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<td>Metal / plastic pipe</td> | <td>Metal / plastic pipe</td> | ||
Line 164: | Line 141: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>1. Watertight connectors and gaskets properly installed</td> | <td>1. Watertight connectors and gaskets properly installed</td> | ||
Line 170: | Line 146: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>2. Anti-seep collars properly spaced and having watertight connections to pipe</td> | <td>2. Anti-seep collars properly spaced and having watertight connections to pipe</td> | ||
Line 176: | Line 151: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<td>3. Backfill placed and tamped by hand under “haunches” of pipe</td> | <td>3. Backfill placed and tamped by hand under “haunches” of pipe</td> | ||
Line 182: | Line 156: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>4. Remaining backfill placed in max. 8 inch lifts using small power tamping equipment until 2 feet cover over pipe is reached</td> | <td>4. Remaining backfill placed in max. 8 inch lifts using small power tamping equipment until 2 feet cover over pipe is reached</td> | ||
Line 188: | Line 161: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td colspan=3>Concrete pipe</td> | <td colspan=3>Concrete pipe</td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>1. Pipe set on blocks or concrete slab for pouring of low cradle</td> | <td>1. Pipe set on blocks or concrete slab for pouring of low cradle</td> | ||
Line 198: | Line 169: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>2. Pipe installed with rubber gasket joints with no spalling in gasket interface area</td> | <td>2. Pipe installed with rubber gasket joints with no spalling in gasket interface area</td> | ||
Line 204: | Line 174: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>3. Excavation for lower half of anti-seep collar(s) with reinforcing steel set</td> | <td>3. Excavation for lower half of anti-seep collar(s) with reinforcing steel set</td> | ||
Line 210: | Line 179: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>4. Entire area where anti-seep collar(s) will come in contact with pipe coated with mastic or other approved waterproof sealant</td> | <td>4. Entire area where anti-seep collar(s) will come in contact with pipe coated with mastic or other approved waterproof sealant</td> | ||
Line 216: | Line 184: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>5. Low cradle and bottom half of anti-seep collar installed as monolithic pour and of an approved mix</td> | <td>5. Low cradle and bottom half of anti-seep collar installed as monolithic pour and of an approved mix</td> | ||
Line 222: | Line 189: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>6. Upper half of anti-seep collar(s) formed with reinforcing steel set</td> | <td>6. Upper half of anti-seep collar(s) formed with reinforcing steel set</td> | ||
Line 233: | Line 199: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>8. Forms stripped and collar inspected for honeycomb prior to backfilling. Parge if necessary.</td> | <td>8. Forms stripped and collar inspected for honeycomb prior to backfilling. Parge if necessary.</td> | ||
Line 239: | Line 204: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td colspan=3>C. Backfilling</td> | <td colspan=3>C. Backfilling</td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Fill placed in maximum 8 inch lifts</td> | <td>Fill placed in maximum 8 inch lifts</td> | ||
Line 249: | Line 212: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Backfill taken minimum 2 feet above top of antiseep collar elevation before traversing with heavy equipment</td> | <td>Backfill taken minimum 2 feet above top of antiseep collar elevation before traversing with heavy equipment</td> | ||
Line 255: | Line 217: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<th colspan=3>4. Riser / Outlet Structure Installation</th> | <th colspan=3>4. Riser / Outlet Structure Installation</th> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Riser located within embankment</td> | <td>Riser located within embankment</td> | ||
Line 265: | Line 225: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td colspan=3>A. Metal riser</td> | <td colspan=3>A. Metal riser</td> | ||
Line 274: | Line 233: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Set on blocks to design elevations and plumbed</td> | <td>Set on blocks to design elevations and plumbed</td> | ||
Line 280: | Line 238: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Reinforcing bars placed at right angles and projecting into sides of riser</td> | <td>Reinforcing bars placed at right angles and projecting into sides of riser</td> | ||
Line 286: | Line 243: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Concrete poured so as to fill inside of riser to invert of barrel</td> | <td>Concrete poured so as to fill inside of riser to invert of barrel</td> | ||
Line 300: | Line 256: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Riser base set to design elevation</td> | <td>Riser base set to design elevation</td> | ||
Line 306: | Line 261: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>If more than one section, no spalling in gasket interface area; gasket or approved caulking material placed securely</td> | <td>If more than one section, no spalling in gasket interface area; gasket or approved caulking material placed securely</td> | ||
Line 312: | Line 266: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Watertight and structurally sound collar or gasket joint where structure connects to pipe spillway</td> | <td>Watertight and structurally sound collar or gasket joint where structure connects to pipe spillway</td> | ||
Line 318: | Line 271: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td colspan=3>C. Poured concrete structure</td> | <td colspan=3>C. Poured concrete structure</td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Footing excavated or formed on stable subgrade, to design dimensions with reinforcing steel set</td> | <td>Footing excavated or formed on stable subgrade, to design dimensions with reinforcing steel set</td> | ||
Line 328: | Line 279: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Structure formed to design dimensions, with reinforcing steel set as per plan</td> | <td>Structure formed to design dimensions, with reinforcing steel set as per plan</td> | ||
Line 334: | Line 284: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Concrete of an approved mix and vibrated into place (protected from freezing while curing, if necessary)</td> | <td>Concrete of an approved mix and vibrated into place (protected from freezing while curing, if necessary)</td> | ||
Line 340: | Line 289: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Forms stripped & inspected for honeycomb prior to backfilling; parge if necessary</td> | <td>Forms stripped & inspected for honeycomb prior to backfilling; parge if necessary</td> | ||
Line 346: | Line 294: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<th colspan=3>5. Embankment Construction</th> | <th colspan=3>5. Embankment Construction</th> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Fill material</td> | <td>Fill material</td> | ||
Line 356: | Line 302: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Compaction</td> | <td>Compaction</td> | ||
Line 362: | Line 307: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td colspan=3>Embankment</td> | <td colspan=3>Embankment</td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>1. Fill placed in specified lifts and compacted with appropriate equipment</td> | <td>1. Fill placed in specified lifts and compacted with appropriate equipment</td> | ||
Line 372: | Line 315: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>2. Constructed to design cross-section, side slopes and top width</td> | <td>2. Constructed to design cross-section, side slopes and top width</td> | ||
Line 378: | Line 320: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>3. Constructed to design elevation plus allowance for settlement</td> | <td>3. Constructed to design elevation plus allowance for settlement</td> | ||
Line 387: | Line 328: | ||
<th colspan=3>6. Impounded Area Construction</th> | <th colspan=3>6. Impounded Area Construction</th> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Excavated / graded to design contours and side slopes</td> | <td>Excavated / graded to design contours and side slopes</td> | ||
Line 393: | Line 333: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Inlet pipes have adequate outfall protection</td> | <td>Inlet pipes have adequate outfall protection</td> | ||
Line 412: | Line 351: | ||
<th colspan=3>7. Earth Emergency Spillway Construction</th> | <th colspan=3>7. Earth Emergency Spillway Construction</th> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Spillway located in cut or structurally stabilized with riprap, gabions, concrete, etc.</td> | <td>Spillway located in cut or structurally stabilized with riprap, gabions, concrete, etc.</td> | ||
Line 418: | Line 356: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Excavated to proper cross-section, side slopes and bottom width</td> | <td>Excavated to proper cross-section, side slopes and bottom width</td> | ||
Line 424: | Line 361: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Entrance channel, crest, and exit channel constructed to design grades and elevations</td> | <td>Entrance channel, crest, and exit channel constructed to design grades and elevations</td> | ||
Line 430: | Line 366: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<th colspan=3>8. Outlet Protection</th> | <th colspan=3>8. Outlet Protection</th> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td colspan=3>A. End section</td> | <td colspan=3>A. End section</td> | ||
Line 446: | Line 380: | ||
<td colspan=3>B. Endwall</td> | <td colspan=3>B. Endwall</td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Footing excavated or formed on stable subgrade, to design dimensions and reinforcing steel set, if specified</td> | <td>Footing excavated or formed on stable subgrade, to design dimensions and reinforcing steel set, if specified</td> | ||
Line 452: | Line 385: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Endwall formed to design dimensions with reinforcing steel set as per plan</td> | <td>Endwall formed to design dimensions with reinforcing steel set as per plan</td> | ||
Line 458: | Line 390: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Concrete of an approved mix and vibrated into place (protected from freezing, if necessary)</td> | <td>Concrete of an approved mix and vibrated into place (protected from freezing, if necessary)</td> | ||
Line 464: | Line 395: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Forms stripped and structure inspected for honeycomb prior to backfilling; parge if necessary</td> | <td>Forms stripped and structure inspected for honeycomb prior to backfilling; parge if necessary</td> | ||
Line 470: | Line 400: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td colspan=3>C. Riprap apron / channel</td> | <td colspan=3>C. Riprap apron / channel</td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Apron / channel excavated to design cross-section with proper transition to existing ground</td> | <td>Apron / channel excavated to design cross-section with proper transition to existing ground</td> | ||
Line 480: | Line 408: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Filter fabric in place</td> | <td>Filter fabric in place</td> | ||
Line 486: | Line 413: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Stone sized as per plan and uniformly place at the thickness specified</td> | <td>Stone sized as per plan and uniformly place at the thickness specified</td> | ||
Line 492: | Line 418: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<th colspan=3>9. Vegetative Stabilization</th> | <th colspan=3>9. Vegetative Stabilization</th> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Approved seed mixture or sod</td> | <td>Approved seed mixture or sod</td> | ||
Line 502: | Line 426: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Proper surface preparation and required soil mendments</td> | <td>Proper surface preparation and required soil mendments</td> | ||
Line 508: | Line 431: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Excelsior mat or other stabilization, as per plan</td> | <td>Excelsior mat or other stabilization, as per plan</td> | ||
Line 514: | Line 436: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<th colspan=3>10. Miscellaneous</th> | <th colspan=3>10. Miscellaneous</th> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Drain for ponds having a permanent pool</td> | <td>Drain for ponds having a permanent pool</td> | ||
Line 524: | Line 444: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Trash rack / anti-vortex device secured to outlet structure</td> | <td>Trash rack / anti-vortex device secured to outlet structure</td> | ||
Line 530: | Line 449: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Trash protection for low flow pipes, orifices, etc.</td> | <td>Trash protection for low flow pipes, orifices, etc.</td> | ||
Line 536: | Line 454: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Fencing (when required)</td> | <td>Fencing (when required)</td> | ||
Line 542: | Line 459: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Access road</td> | <td>Access road</td> | ||
Line 548: | Line 464: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Set aside for clean-out maintenance</td> | <td>Set aside for clean-out maintenance</td> | ||
Line 554: | Line 469: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<th colspan=3>11. Stormwater Wetlands</th> | <th colspan=3>11. Stormwater Wetlands</th> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Adequate water balance</td> | <td>Adequate water balance</td> | ||
Line 564: | Line 477: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Variety of depth zones present</td> | <td>Variety of depth zones present</td> | ||
Line 570: | Line 482: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Approved pondscaping plan in place and budget for additional plantings</td> | <td>Approved pondscaping plan in place and budget for additional plantings</td> | ||
Line 576: | Line 487: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Plants and materials ordered 6 months prior to construction</td> | <td>Plants and materials ordered 6 months prior to construction</td> | ||
Line 582: | Line 492: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Construction planned to allow for adequate planting and establishment of plant community (April-June planting window)</td> | <td>Construction planned to allow for adequate planting and establishment of plant community (April-June planting window)</td> | ||
Line 588: | Line 497: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<th colspan=3>12. Final Inspection</th> | <th colspan=3>12. Final Inspection</th> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Construction sediment removed from settling basin</td> | <td>Construction sediment removed from settling basin</td> | ||
Line 598: | Line 505: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Contributing drainage area stabilized</td> | <td>Contributing drainage area stabilized</td> | ||
Line 604: | Line 510: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Vegetation established per specifications</td> | <td>Vegetation established per specifications</td> | ||
Line 610: | Line 515: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td>Inlet and outlet structures operational</td> | <td>Inlet and outlet structures operational</td> | ||
Line 616: | Line 520: | ||
<td> </td> | <td> </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td colspan=3>Comments: | <td colspan=3>Comments: | ||
− | |||
</td> | </td> | ||
</tr> | </tr> | ||
− | |||
<tr> | <tr> | ||
<td colspan=3>Actions to be Taken: | <td colspan=3>Actions to be Taken: | ||
− | |||
</td> | </td> | ||
</tr> | </tr> | ||
+ | </table> | ||
− | </ | + | <noinclude> |
− | [[ | + | [[Category:Level 3 - General information, reference, tables, images, and archives/Tables/Checklist]] |
+ | [[Category:Level 3 - General information, reference, tables, images, and archives/Tables/Ponds and wetlands (constructed)]] | ||
+ | </noinclude> |
Stormwater pond/wetland - construction inspection checklist.
Link to this table
To access an Excel version of form (for field use), click here.
Project: | ||
Location: | ||
Site Status: | ||
Date: | ||
Time: | ||
Inspector: | ||
Construction Sequence | Satisfactory/Unsatisfactory | Comments |
---|---|---|
1. Pre-Construction/Materials and Equipment | ||
Pre-construction meeting | ||
Pipe and appurtenances on-site prior to construction and dimensions checked | ||
1. Material (including protective coating, if specified) | ||
2. Diameter | ||
3. Dimensions of metal riser or pre-cast concrete outlet structure | ||
4. Required dimensions between water control structures (orifices, weirs, etc.) are in accordance with approved plans | ||
5. Barrel stub for prefabricated pipe structures at proper angle for design barrel slope | ||
6. Number and dimensions of prefabricated antiseep collars | ||
7. Watertight connectors and gaskets | ||
8. Outlet drain valve | ||
Project benchmark near pond site | ||
Facility location staked out | ||
Equipment for temporary de-watering | ||
Temporary erosion and sediment control in place | ||
2. Subgrade Preparation | ||
Area beneath embankment stripped of all vegetation, topsoil, and organic matter | ||
3. Pipe Installation | ||
Method of installation detailed on plans | ||
A. Bed preparation | ||
Installation trench excavated with specified side slopes | ||
Stable, uniform, dry subgrade of relatively impervious material (If subgrade is wet, contractor shall have defined steps before proceeding with installation) | ||
Invert at proper elevation and grade | ||
B. Pipe placement | ||
Metal / plastic pipe | ||
1. Watertight connectors and gaskets properly installed | ||
2. Anti-seep collars properly spaced and having watertight connections to pipe | ||
3. Backfill placed and tamped by hand under “haunches” of pipe | ||
4. Remaining backfill placed in max. 8 inch lifts using small power tamping equipment until 2 feet cover over pipe is reached | ||
Concrete pipe | ||
1. Pipe set on blocks or concrete slab for pouring of low cradle | ||
2. Pipe installed with rubber gasket joints with no spalling in gasket interface area | ||
3. Excavation for lower half of anti-seep collar(s) with reinforcing steel set | ||
4. Entire area where anti-seep collar(s) will come in contact with pipe coated with mastic or other approved waterproof sealant | ||
5. Low cradle and bottom half of anti-seep collar installed as monolithic pour and of an approved mix | ||
6. Upper half of anti-seep collar(s) formed with reinforcing steel set | ||
7. Concrete for collar of an approved mix and vibrated into place (protected from freezing while curing, if necessary) | ||
8. Forms stripped and collar inspected for honeycomb prior to backfilling. Parge if necessary. | ||
C. Backfilling | ||
Fill placed in maximum 8 inch lifts | ||
Backfill taken minimum 2 feet above top of antiseep collar elevation before traversing with heavy equipment | ||
4. Riser / Outlet Structure Installation | ||
Riser located within embankment | ||
A. Metal riser | ||
Riser base excavated or formed on stable subgrade to design dimensions | ||
Set on blocks to design elevations and plumbed | ||
Reinforcing bars placed at right angles and projecting into sides of riser | ||
Concrete poured so as to fill inside of riser to invert of barrel | ||
B. Pre-cast concrete structurer | ||
Dry and stable subgrade | ||
Riser base set to design elevation | ||
If more than one section, no spalling in gasket interface area; gasket or approved caulking material placed securely | ||
Watertight and structurally sound collar or gasket joint where structure connects to pipe spillway | ||
C. Poured concrete structure | ||
Footing excavated or formed on stable subgrade, to design dimensions with reinforcing steel set | ||
Structure formed to design dimensions, with reinforcing steel set as per plan | ||
Concrete of an approved mix and vibrated into place (protected from freezing while curing, if necessary) | ||
Forms stripped & inspected for honeycomb prior to backfilling; parge if necessary | ||
5. Embankment Construction | ||
Fill material | ||
Compaction | ||
Embankment | ||
1. Fill placed in specified lifts and compacted with appropriate equipment | ||
2. Constructed to design cross-section, side slopes and top width | ||
3. Constructed to design elevation plus allowance for settlement | ||
6. Impounded Area Construction | ||
Excavated / graded to design contours and side slopes | ||
Inlet pipes have adequate outfall protection | ||
Forebay(s) constructed per plans | ||
Pond benches construction per plans | ||
7. Earth Emergency Spillway Construction | ||
Spillway located in cut or structurally stabilized with riprap, gabions, concrete, etc. | ||
Excavated to proper cross-section, side slopes and bottom width | ||
Entrance channel, crest, and exit channel constructed to design grades and elevations | ||
8. Outlet Protection | ||
A. End section | ||
Securely in place and properly backfilled | ||
B. Endwall | ||
Footing excavated or formed on stable subgrade, to design dimensions and reinforcing steel set, if specified | ||
Endwall formed to design dimensions with reinforcing steel set as per plan | ||
Concrete of an approved mix and vibrated into place (protected from freezing, if necessary) | ||
Forms stripped and structure inspected for honeycomb prior to backfilling; parge if necessary | ||
C. Riprap apron / channel | ||
Apron / channel excavated to design cross-section with proper transition to existing ground | ||
Filter fabric in place | ||
Stone sized as per plan and uniformly place at the thickness specified | ||
9. Vegetative Stabilization | ||
Approved seed mixture or sod | ||
Proper surface preparation and required soil mendments | ||
Excelsior mat or other stabilization, as per plan | ||
10. Miscellaneous | ||
Drain for ponds having a permanent pool | ||
Trash rack / anti-vortex device secured to outlet structure | ||
Trash protection for low flow pipes, orifices, etc. | ||
Fencing (when required) | ||
Access road | ||
Set aside for clean-out maintenance | ||
11. Stormwater Wetlands | ||
Adequate water balance | ||
Variety of depth zones present | ||
Approved pondscaping plan in place and budget for additional plantings | ||
Plants and materials ordered 6 months prior to construction | ||
Construction planned to allow for adequate planting and establishment of plant community (April-June planting window) | ||
12. Final Inspection | ||
Construction sediment removed from settling basin | ||
Contributing drainage area stabilized | ||
Vegetation established per specifications | ||
Inlet and outlet structures operational | ||
Comments: | ||
Actions to be Taken: |
This page was last edited on 30 April 2024, at 19:20.