Storm Sewer Inlet and Catch Basin Acceptance Inspection

Acceptance inspection for newly installed storm sewer inlets and catch basins, verifying invert elevation, grate fit, sump depth, pipe connections, and overall installation compliance before closeout.

Inspection Details and Site Readiness

• Inspection location and structure ID recorded
  Record the project name, station/offset or address, structure identifier, and date of inspection.
• Structure accessible for safe inspection
  Confirm the inlet or catch basin is accessible without unsafe entry, traffic exposure, or unstable ground conditions.
• As-built or plan reference available
  Confirm the approved plan, shop drawing, or as-built reference is available for field comparison.
• Weather and site conditions suitable for verification
  Confirm conditions allow reliable measurement of elevations, sump depth, and pipe connections.
• Photo set captured for acceptance record
  Capture overall structure view and key verification points.

Structure Condition and Installation

• Structure is plumb, stable, and free of visible settlement
  Check for tilt, rocking, differential settlement, or separation at joints.
• Frame, cover, and grate are properly seated and flush
  Verify the frame and grate fit securely without rocking, excessive gaps, or protrusions that create a hazard or non-conformance.
• Grate type matches approved design
  Confirm the installed grate or cover matches the approved detail for the inlet or catch basin location.
• Visible cracks, spalls, or damaged components absent
  Inspect precast or cast-in-place components for damage that could affect performance or durability.
• Structure interior is clean and free of construction debris
  Check for sediment, trash, concrete residue, or other debris that could obstruct flow.

Elevation, Sump, and Hydraulic Verification

• Rim elevation recorded
  Enter the final rim elevation measured in the field.
• Inlet invert elevation recorded
  Enter the final invert elevation at the inlet or outlet as applicable.
• Invert elevation matches approved plans or as-built tolerance
  Verify the measured invert elevation is within project tolerance of the approved design or as-built requirement.
• Sump depth recorded
  Enter the measured sump depth below the outlet invert.
• Sump depth meets project requirement
  Confirm the installed sump depth meets the specified design or municipal standard.

Pipe Connections and Flow Path

• Receiving pipe connected to correct structure opening
  Verify the storm sewer pipe is connected to the correct inlet or outlet opening and matches the approved configuration.
• Pipe alignment and joint condition acceptable
  Check that the pipe enters the structure without visible misalignment, offset, leakage, or damaged joints.
• Pipe invert elevation recorded
  Enter the measured invert elevation of the receiving pipe at the structure connection.
• Flow path is unobstructed
  Confirm the inlet, sump, and connected pipe provide a clear flow path with no visible obstruction.

Safety, Documentation, and Closeout

• Openings protected during inspection
  Confirm the structure was managed safely during inspection and any temporary protection was maintained as needed.
• Deficiencies documented with corrective action
  Record any non-conformance, deficiency, or punch-list item requiring correction before acceptance.
• Final acceptance recommendation
  Select the overall recommendation for the structure.
• Inspector signature
  Inspector signs to confirm the acceptance review is complete.