| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. UNDERGROUND UTILITY SURVEY | |||
| A1 | Underground utility drawings reviewed: power, water, gas, telecom, sewage lines identified Acceptance: As-built drawings on site; utility owners contacted; clearance letter obtained | Cl. 4 — Pre-excavation survey | OK NC NA HOLD |
| A2 | Cable/pipe detector scan completed; any detected service marked on ground Acceptance: GPR/CAT scan done; markings fresh; depth of any service recorded | Cl. 4 — Detection scan | OK NC NA HOLD |
| A3 | Manual trial pits dug to confirm detected services before machine excavation Acceptance: Hand-dug trial pits confirm location/depth; no machine within 500 mm of service | Cl. 4 — Hand-dig verification | OK NC NA HOLD |
| B. SOIL AND SUPPORT ASSESSMENT | |||
| B1 | Soil type assessed by competent person; stability evaluated for depth and weather Acceptance: Soil report / visual; Type A (stable) / B (intermediate) / C (unstable) assigned | Cl. 5 — Soil classification | OK NC NA HOLD |
| B2 | Excavation >1.5 m: side-sloping, benching, or shoring designed and installed Acceptance: Slope 1:1 soft / 1:0.5 stiff; or trench box / shoring per designed drawing | Cl. 5 — Stability protection | OK NC NA HOLD |
| B3 | Shoring / trench box installed per design; struts tight; no deflection; inspected daily Acceptance: Design signed by engineer; installation matches drawing; daily check logged | Cl. 5 — Shoring | OK NC NA HOLD |
| B4 | Spoil / excavated material kept minimum 1.0 m from edge; no surcharge on excavation walls Acceptance: Spoil set back ≥1 m; heavy plant set back further per depth; no edge loading | Cl. 5 — Spoil placement | OK NC NA HOLD |
| C. ACCESS, EGRESS AND BARRICADING | |||
| C1 | Ladder / step access in every 7.5 m of trench length; ladder extends 1 m above ground Acceptance: Ladder within 7.5 m; secured; extends 1 m; non-slip feet | Cl. 6 — Access | OK NC NA HOLD |
| C2 | Hard barricade around excavation; warning signs and lights for night visibility Acceptance: Hard barrier 1.0 m high, 1.0 m offset; flashing lights at night; signage DANGER | Cl. 6 — Barricading | OK NC NA HOLD |
| C3 | Pedestrian crossings: walkway boards with handrails where trench crosses footpath Acceptance: Boards ≥600 mm wide; handrails both sides for >2 m depth; secured | Cl. 6 — Pedestrian safety | OK NC NA HOLD |