Difference between revisions of "Stormwater pond/ wetland - construction inspection checklist"
(Created page with " <center><font size=3>'''This table shows Stormwater pond/ wetland - construction inspection checklist.'''</font size><br> Link to this [[Stormwater pond/ wetland - constru...") |
m |
||
| Line 1: | Line 1: | ||
| − | + | ||
<center><font size=3>'''This table shows Stormwater pond/ wetland - construction inspection checklist.'''</font size><br> | <center><font size=3>'''This table shows Stormwater pond/ wetland - construction inspection checklist.'''</font size><br> | ||
| Line 35: | Line 35: | ||
<tr> | <tr> | ||
<td>Pre-construction meeting</td> | <td>Pre-construction meeting</td> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> X</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>2. Diameter</td> | <td>2. Diameter</td> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>7. Watertight connectors and gaskets</td> | <td>7. Watertight connectors and gaskets</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>8. Outlet drain valve</td> | <td>8. Outlet drain valve</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Project benchmark near pond site</td> | <td>Project benchmark near pond site</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>X</td> | <td>X</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Facility location staked out</td> | <td>Facility location staked out</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Equipment for temporary de-watering</td> | <td>Equipment for temporary de-watering</td> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 130: | Line 130: | ||
<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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| Line 139: | Line 139: | ||
<tr> | <tr> | ||
<td>Method of installation detailed on plans</td> | <td>Method of installation detailed on plans</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 149: | Line 149: | ||
<tr> | <tr> | ||
<td>Installation trench excavated with specified side slopes</td> | <td>Installation trench excavated with specified side slopes</td> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Invert at proper elevation and grade</td> | <td>Invert at proper elevation and grade</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 171: | Line 171: | ||
<tr> | <tr> | ||
<td>Metal / plastic pipe</td> | <td>Metal / plastic pipe</td> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 205: | Line 205: | ||
<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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>7. Concrete for collar of an approved mix and vibrated into place (protected from freezing while curing, if necessary)</td> | <td>7. Concrete for collar of an approved mix and vibrated into place (protected from freezing while curing, if necessary)</td> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 256: | Line 256: | ||
<tr> | <tr> | ||
<td>Fill placed in maximum 8 inch lifts</td> | <td>Fill placed in maximum 8 inch lifts</td> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 272: | Line 272: | ||
<tr> | <tr> | ||
<td>Riser located within embankment</td> | <td>Riser located within embankment</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 281: | Line 281: | ||
<tr> | <tr> | ||
<td>Riser base excavated or formed on stable subgrade to design dimensions</td> | <td>Riser base excavated or formed on stable subgrade to design dimensions</td> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| Line 307: | Line 307: | ||
<tr> | <tr> | ||
<td>Dry and stable subgrade</td> | <td>Dry and stable subgrade</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Riser base set to design elevation</td> | <td>Riser base set to design elevation</td> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 335: | Line 335: | ||
<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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 363: | Line 363: | ||
<tr> | <tr> | ||
<td>Fill material</td> | <td>Fill material</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Compaction</td> | <td>Compaction</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 379: | Line 379: | ||
<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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| Line 401: | Line 401: | ||
<tr> | <tr> | ||
<td>Excavated / graded to design contours and side slopes</td> | <td>Excavated / graded to design contours and side slopes</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Inlet pipes have adequate outfall protection</td> | <td>Inlet pipes have adequate outfall protection</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Forebay(s) constructed per plans</td> | <td>Forebay(s) constructed per plans</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Pond benches construction per plans</td> | <td>Pond benches construction per plans</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| Line 426: | Line 426: | ||
<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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 451: | Line 451: | ||
<tr> | <tr> | ||
<td>Securely in place and properly backfilled</td> | <td>Securely in place and properly backfilled</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| Line 460: | Line 460: | ||
<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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| Line 488: | Line 488: | ||
<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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Filter fabric in place</td> | <td>Filter fabric in place</td> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 510: | Line 510: | ||
<tr> | <tr> | ||
<td>X</td> | <td>X</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Approved seed mixture or sod</td> | <td>Approved seed mixture or sod</td> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 538: | Line 538: | ||
<tr> | <tr> | ||
<td>Drain for ponds having a permanent pool</td> | <td>Drain for ponds having a permanent pool</td> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Fencing (when required)</td> | <td>Fencing (when required)</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| − | + | ||
<tr> | <tr> | ||
<td>Access road</td> | <td>Access road</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Set aside for clean-out maintenance</td> | <td>Set aside for clean-out maintenance</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 580: | Line 580: | ||
<tr> | <tr> | ||
<td>Adequate water balance</td> | <td>Adequate water balance</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Variety of depth zones present</td> | <td>Variety of depth zones present</td> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </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> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
| Line 614: | Line 614: | ||
<tr> | <tr> | ||
<td>Construction sediment removed from settling basin</td> | <td>Construction sediment removed from settling basin</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Contributing drainage area stabilized</td> | <td>Contributing drainage area stabilized</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Vegetation established per specifications</td> | <td>Vegetation established per specifications</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Inlet and outlet structures operational</td> | <td>Inlet and outlet structures operational</td> | ||
| − | <td> | + | <td> </td> |
| − | <td> | + | <td> </td> |
</tr> | </tr> | ||
Revision as of 20:30, 19 February 2013
Link to this table
| 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) | X | |
| 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 | ||
| X | ||
| 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 | ||
| X | ||
| 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:
|
||