---
spec_code: TfNSW-R11-Ed5Rev8-PeakhurstOct2024
standard_body: TfNSW
title: Stormwater Drainage
edition: Ed 5 Rev 8
project_specific_date: 2024-10-01
source_pdf_vault_path: 11_OpsMan_LFCS/Operations/Jobs/Upcoming/2626 - Mack Civil - Stormwater Pit EXA01A-08/03 - Plans and Specifications/03a - Issued for Construction/FRBR_R011_E5_R8_FINAL.pdf
source_drive_id: TBC
pages: TBC (~60-80 pages typical for project-specific R11)
summarised: 2026-05-04
summarised_by: cowork-lfcs (Phase 7 lfcs-spec-summarise — manual demonstration; full skill-driven extraction pending PDF re-read)
summary_mode: full
status: starter-summary-pending-full-extraction
related_specs:
  - "[[TfNSW-R53-Ed3Rev5-PeakhurstOct2024-summary]]"
related_concepts:
  - "[[TfNSW-R0220-pit-pattern]]"
applies_to_jobs:
  - "[[2626 - Mack Civil - Stormwater Pit EXA01A-08]]"
airtable_record: recplbEyXCGbAkSWm
---

# TfNSW R11 Stormwater Drainage — Ed 5 Rev 8 (Project-specific Oct 2024)

> **Status:** starter summary built from prior project work + concept-note + Airtable Specifications row context. Full skill-driven extraction (`lfcs-spec-summarise` against the actual PDF) pending — this file is the regression-template demonstrating what the output should look like.

## TL;DR (5 lines)

R11 governs design + construction + testing of stormwater drainage works on TfNSW projects. **3 Hold Points** are the major commercial-impact clauses (4.3.3 inadequate foundation; 4.4.2 Engineer Cert of Conformity for joints pre-backfill; 5.2 CCTV inspection before pavement reinstatement). **2 Witness Points** require 24h-7d advance notice to Principal (4.3 excavation; 4.7.2 construction). Spec compliance burden is heavy — Project Quality Plan, signed Cert of Conformity per pour, NATA-endorsed concrete mix from TfNSW Register, dayworks docket discipline. Allow ~1.5 supervisor-days admin per pit. Engineer Cert (~$500 external) for Hold Point 4.4.2.

## Hold Points (verbatim where possible)

| Clause | Hold Point | Lead time | LFCS impact |
|---|---|---|---|
| 4.3.3 | Inadequate foundation material treatment — if encountered during excavation, Principal Notification + treatment direction required before pit base pour | Variable | Variation at dayworks rates if triggered |
| 4.4.2 | Cert of Conformity for joints + pipes pre-backfill — competent Engineer must inspect + sign before backfill released | 24-48h to schedule | ~$500 external Engineer Cert per pit. Can't backfill until signed. |
| 5.2 | CCTV inspection of all connected pipes — Hold Point on commencement of overlying pavement | 24-48h to schedule | Often head-contractor scope; if LFCS = specialist subby cost ~$800-1,500 |

Plus implied/cross-referenced Hold Points:
- 4.7.2 — construction of "other drainage structures" notification (24h-7d advance to Principal)

## Witness Points (verbatim where possible)

| Clause | Witness Point | Notice |
|---|---|---|
| 4.3 | Excavation for drainage structures | 24h-7d advance to Principal |
| 4.7.2 | Construction of drainage structures | Advance notice |
| 4.4.4 | Sealing of lifting holes + flush/butt joints | Pre-pour confirmation |

## Identified Records (per R11/R53 cross-reference)

- Concrete mix design submission per R53 2.4.3 (5+ working days lead time if not on TfNSW Register)
- Concrete temperature monitoring per R53 3.3.2 (air temp, concrete temp at placing — air <5°C or >35°C, concrete <10°C or >32°C = Identified Record + non-conformance check)
- ACRS reinforcement supply chain documentation per R53 1.4
- AAR aggregate testing certificates per R53 2.2.2
- Daily daywork sheets signed by MC Site Supervisor + TfNSW Superintendent's Representative at end of each shift (per RFI 36 §5)

## Mandatory clauses

- **Project Quality Plan (PQP)** — must be in place before commencement; submitted to Principal for review. Covers all Hold + Witness Points, mix design, testing regime, NCR procedure, Method Statements per element type.
- **Cert of Conformity per pour** — signed by competent Engineer for the pour batch's compliance with R53 + R11 mix + reo + cover specs.
- **Method Statement** for each major element (excavation, concrete pour, backfill).
- **Risk-based inspection schedule** linked to Hold + Witness Points.

## Material specs (concrete + reo + ancillaries)

- **Concrete grade:** N25 default per R0220 (cross-ref). Project-specific spec may upgrade to N32 / N40 per design.
- **NATA-endorsed mix from TfNSW Register of Concrete Mixes** required (per R53 2.4.3). If supplier mix not on Register, project assessment lead time = 5+ working days HOLD POINT.
- **Reinforcement:** Grade 500N typical. ACRS-certified supply chain required (R53 1.4).
- **Bituthene self-adhering membrane** for joint sealing per 4.5.3.
- **Curing compound:** AS 3799 Class B Type 1-D per R53 3.4. Wet curing alternative permitted.
- **Backfill:** Type SO Select Fill (Side + Overlay zones) + general fill per 4.9. ≥95% relative compaction min.

## Workmanship / construction tolerances

- 50mm minimum cover to reinforcement (per R0220 Note 4 — unless drawing shows otherwise).
- R20 rounded edges on all exposed concrete (R0220 Note 3).
- Construction joint roughened + clean prep per R53 3.3.9.
- Pit depth max 3500mm (R0220 Note 8).
- 100mm minimum gap between pit walls + pipe penetrations (R0220 Note 9).
- Step irons mandatory if pit depth >600mm (R0220 Note 2 — galv AS 1657 + AS/NZS 4680).
- 50mm blinding layer plain concrete per 4.7.2.
- Strip formwork ≥2 days for external surfaces (R53 3.3.7).
- Cure 7 days minimum.

## Inspection + testing requirements

- Pre-pour: reo placement + cover + tying; mix design verified; temp logged.
- Post-pour: Cert of Conformity signed within set time after pour.
- Pre-backfill: Engineer Cert per Hold Point 4.4.2.
- Pre-pavement: CCTV inspection per Hold Point 5.2.
- Daily daywork dockets (RFI 36 governance pattern).

## Gotchas (commercial-impact items)

1. **NATA mix not on TfNSW Register = 5+ working days project assessment HOLD POINT.** Confirm concrete supplier upfront — if not Register-listed, build the lead time into programme + add admin hours.
2. **Cert of Conformity Engineer (R11 4.4.2) is EXTERNAL cost** — competent Engineer signs each pour pre-backfill. Allow $500-$800 per pour.
3. **CCTV inspection (R11 5.2)** — Hold Point on commencement of overlying pavement. Often head-contractor scope BUT confirm; if LFCS = specialist subby.
4. **Concrete temperature limits (R53 3.3.2)** — late autumn / winter Sydney early-morning frost is a watch. Identified Record + non-conformance check if breached.
5. **Daily daywork docket discipline (RFI 36 §5)** — MC Site Sup + TfNSW SO must sign at end of each shift. Unsigned dockets = unpaid. Site supervisor must hand-deliver.

## Cross-references

- **R53 Concrete for General Works** — mix design (2.4.3), temp limits (3.3.2), curing (3.4), construction joints (3.3.9), AAR aggregates (2.2.2), ACRS reo (1.4), strip times (3.3.7).
- **R0220 series Standard Drawings** — pit geometry, lintel, grate, deep-pit detail.
- **R44** — disposal of demolished material (lawful facility).
- **R71** — pavement (DGB 20 / DGB 40 base/subbase relevant if LFCS scope includes pavement reinstatement, which it usually doesn't).

## Application to LFCS scope (TL;DR for pricers)

**For any LFCS bid touching R11-governed work** (stormwater pits, pipe install, drainage structures), the spec adds **~1.5 supervisor-days of admin per pit** (Project Quality Plan + Hold Point notifications + Witness Point notifications + Cert of Conformity per pour + daywork docket admin) plus **~$500 external Engineer Cert per Hold Point 4.4.2**. Pricers should:

1. Confirm concrete supplier is on TfNSW Register of Concrete Mixes (or build 5-day lead time + $300 admin per R53 2.4.3 Hold Point).
2. Allow Cert of Conformity ($500-$800) per pour as external cost line item.
3. Build Witness Point notifications (24h-7d advance) into programme.
4. Default supply boundary: concrete + reo + AAR/NATA/ACRS supply chain = head-contractor responsibility unless explicitly LFCS scope.
5. Cross-reference R53 for all concrete-spec details.
6. Daywork docket discipline written into Terms sheet of Tender Summary.

See `[[TfNSW-R0220-pit-pattern]]` concept note for the full pricing pattern when R11 governs.