---
scope: Stormwater Pit (cast-in-situ, internal 900sq × external 1500sq × 1350h)
unit: each
total_per_unit: 10770
labour_rate_basis: $85/hr ordinary (Rate Card V1.7)
source_job: TCE Livingstone Stormwater Pits
source_file: Rates/FRP Rates Development.xlsx — sheet "TCE Liv Stormwater pits"
source_vault: Hasibul Khan / LFCS Obsidian Vault / 08 - Rates/FRP Rates Development.md
last_updated: 2026-05-06
tags: [scope-benchmark, stormwater, pit, cast-in-situ, frp]
---

# Stormwater Pit — internal 900sq × ext 1500sq × 1350h

**Total per pit: $10,770** (ordinary labour basis, no contingency)

## Buildup

| Task | Crew | Hours | Rate | Cost |
|---|---|---|---|---|
| Steel base / Formwork (2 lads × 0.5 day) | 2 | 10 hrs | $85 | $850 |
| Pour base (2 lads × 0.5 day) | 2 | 10 hrs | $85 | $850 |
| Internal walls (2 lads × 0.5 day) | 2 | 10 hrs | $85 | $850 |
| Steel walls (2 lads × 1 day) | 2 | 20 hrs | $85 | $1,700 |
| Form walls (2 lads × 1 day) | 2 | 20 hrs | $85 | $1,700 |
| Pour walls (2 lads × 1 day) | 2 | 20 hrs | $85 | $1,700 |
| Strip (1 lad × 1 day) | 1 | 10 hrs | $85 | $850 |
| Prelims and Margin | — | — | — | $2,270 |
| **Total per pit** | | | | **$10,770** |

## Actuals (TCE Livingstone)

- **Pit 2:** 76.5 hrs ordinary
- **Pit 1:** 112 hrs total (incl OT)

Hours-only check at $85/hr:
- Pit 2 actual labour ≈ $6,503 (vs $8,500 projected) → 24% under projection on Pit 2
- Pit 1 actual labour ≈ $9,520 + OT premium → tracked closer to projection with OT loading

## Productivity calibration

- Use this rate **as-is** for similar TfNSW R0220-style cast-in-situ pits at this geometry, day shift, no live-pipe complications
- **+30–50% productivity adjustment** if working around live pipes (per `pricing-checklist.md` Phase 5 reo-around-live-services rule)
- **+8 hr midnight loading per person per shift** if night-shift crossing midnight (Rate Card V1.7 clause)
- **Drop ~20% productivity** if FRP-install-only scope (Mack supplies, head contractor crew chain) — less coordination overhead

## Notes

- Geometry: internal 900mm × 900mm × 1350h, external 1500mm × 1500mm
- Includes: F+R+P all 4 sides + base + internal walls
- Excludes: reo supply, concrete supply, sand bedding, backfill, demolition of existing, excavation, ERSED, traffic control (typical TfNSW dayworks default = head contractor)
- Step irons: not in this rate; add separately if pit depth >600mm per R11 4.7.4

## Cross-reference

- [[../concepts/TfNSW-R0220-pit-pattern]] — applies to TfNSW dayworks pit jobs
- 2626 Mack Civil EXA01A/08 used this benchmark for FRP-install-only scope check (Round 3 verdict)
- See [[../pricing-checklist]] Phase 4 — "Closest analogue past job"

## Source

Adapted from Hasibul Khan's `08 - Rates/FRP Rates Development.md` (sheet "TCE Liv Stormwater pits"), accessed read-only via Drive shortcut on 2026-05-06 per [[_System/Audits/Friend-Vault-Audit-2026-05-06]].