Design levels from KSA 6997-KSA-03-XX-DR-C-0001 S4-G · to be updated to as-built at handover
IMPERIAL FIELDS – RESIDENTIAL BLOCK
Drainage chamber record · Bishopsford Road, Morden SM4 6BF
SURFACE WATER
S3.9
Precast concrete manhole 1200 dia
⚠ CONFINED SPACE – NO ENTRY WITHOUT PERMITPermit to work · gas monitor · trained operatives · top-man & rescue plan. Most tasks can be done from the surface.
Key data · levels: design (KSA S4-G)
Cover level20.700
Invert level19.395
Sump level18.995
Depth to sump1.705 m
Pipe225 Ø
Cover classD400
Section through chamber
Where it is
Extract of KSA drainage layout – S3.9 circled red.
Inspection & maintenance
Carried out byAppointed third-party maintenance team
- Yearly: lift cover and check the channel and pipes are free of silt and debris.
- Jet the pipes if silted or flow is slow.
- Record every visit in the log below (date, name, findings, action) with photos.
CCTV survey
Report refTo be completed at handover
Survey date—
Video—
Handover record – where CCG finished
Practical CompletionTo be completed at handover
Defects period endsTo be completed at handover
Handover inspectionTo be completed at handover
Condition at handoverTo be completed at handover
Silt at handover—
As-built levels verifiedTo be completed at handover
ID plate fittedTo be completed at handover
Inspection log
| Date | By (company / name) | Silt / condition | Action taken | Next due |
|---|---|---|---|---|