m
m
 
Line 34: 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 40: 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 46: Line 44:
 
<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>2. Diameter</td>
 
<td>2. Diameter</td>
Line 52: 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 58: 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 64: 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 70: Line 64:
 
<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>6. Number and dimensions of prefabricated antiseep collars</td>
 
<td>6. Number and dimensions of prefabricated antiseep collars</td>
Line 76: Line 69:
 
<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>7. Watertight connectors and gaskets</td>
 
<td>7. Watertight connectors and gaskets</td>
Line 82: Line 74:
 
<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>8. Outlet drain valve</td>
 
<td>8. Outlet drain valve</td>
Line 88: Line 79:
 
<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>Project benchmark near pond site</td>
 
<td>Project benchmark near pond site</td>
Line 94: Line 84:
 
<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>Facility location staked out</td>
 
<td>Facility location staked out</td>
Line 100: Line 89:
 
<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>Equipment for temporary de-watering</td>
 
<td>Equipment for temporary de-watering</td>
Line 106: 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 112: Line 99:
 
<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<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 125: Line 110:
 
<th colspan=3>3. Pipe Installation</th>
 
<th colspan=3>3. Pipe Installation</th>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>Method of installation detailed on plans</td>
 
<td>Method of installation detailed on plans</td>
Line 131: 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>
 
 
<tr>
 
<tr>
 
<td>Installation trench excavated with specified side slopes</td>
 
<td>Installation trench excavated with specified side slopes</td>
Line 141: 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 147: Line 128:
 
<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>Invert at proper elevation and grade</td>
 
<td>Invert at proper elevation and grade</td>
Line 153: 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>
 
 
<tr>
 
<tr>
 
<td>Metal / plastic pipe</td>
 
<td>Metal / plastic pipe</td>
Line 163: 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 169: 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 175: Line 151:
 
<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<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 181: 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 187: 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 197: 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 203: 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 209: 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 215: 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 221: 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 232: 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 238: 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 248: 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 254: 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 264: 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 273: 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 279: 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 285: 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 299: 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 305: 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 311: 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 317: 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 327: 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 333: 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 339: 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 345: 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 355: Line 302:
 
<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>Compaction</td>
 
<td>Compaction</td>
Line 361: 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 371: 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 377: 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 386: 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 392: 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 411: 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 417: 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 423: 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 429: 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 445: 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 451: 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 457: 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 463: 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 469: 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 479: Line 408:
 
<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>Filter fabric in place</td>
 
<td>Filter fabric in place</td>
Line 485: 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 491: 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 501: 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 507: 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 513: 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 523: 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 529: 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 535: Line 454:
 
<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>Fencing (when required)</td>
 
<td>Fencing (when required)</td>
Line 541: Line 459:
 
<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>Access road</td>
 
<td>Access road</td>
Line 547: 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 553: 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 563: 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 569: 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 575: 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 581: 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 587: 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>
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<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>Contributing drainage area stabilized</td>
 
<td>Contributing drainage area stabilized</td>
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<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>Vegetation established per specifications</td>
 
<td>Vegetation established per specifications</td>
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<td> </td>
 
<td> </td>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>Inlet and outlet structures operational</td>
 
<td>Inlet and outlet structures operational</td>
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<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>
 
</table>
  
<noinclude>[[category:table]]</noinclude>
+
<noinclude>
<noinclude>[[category:Checklist]]</noinclude>
+
[[category:Checklist]]
 +
</noinclude>

Latest revision as of 15:17, 15 July 2015

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 15 July 2015, at 15:17.