Project at a glance
- Type
- Adoptable S104 drainage
- Sector
- Residential / mixed-use infrastructure
- Location
- Kent
- Package
- Sewers for adoption
- Constraints
- Undertaker standards, approvals, testing records
- Stage
- Adoptable drainage construction stage
Project scenario
S104 drainage is judged against the sewerage undertaker’s standards, not only the developer’s programme. Materials, bedding, manhole construction and as-built quality all feed the adoption conversation later.
Assessment usually starts with agreement status, approved drawings, connection points and how testing windows sit against roads and plot programmes.
Likely scope of works
- Foul and surface water sewer construction
- Manholes to undertaker detail
- Connections and lateral ties as approved
- Bedding, surround and backfill to specification
- Air / water tests and CCTV
- As-built drawings and adoption records
A typical package would be delivered through section 104 contractors in Dartford, constructing foul and surface water sewers to the approved details.
Where sewers sit inside a wider roads package, coordination with roads and sewers in Dartford keeps carriageway and drainage sequences aligned.
Information we would need
- Sewer diameters, depths and lengths
- Manhole count and type
- Temporary works for deep digs
- Testing and CCTV
- As-built survey
- Adoption-related attendances
- Interface connections to plots and attenuation
How the package could be sequenced
- 1
Agreement and drawing check
Confirm S104 status and approved details.
- 2
Sewer construction
Install pipes and manholes to line and level.
- 3
Testing
Carry out required tests and CCTV.
- 4
Records
Compile as-builts for the undertaker.
- 5
Residual actions
List outstanding connections or remedial items.
Interfaces with other trades
Site constraints
Technical approval
Construction should follow locked drawings and conditions.
Material standards
Non-compliant products create adoption friction later.
Testing windows
Tests need access before roads or plots close over sewers.
Deep excavations
Sewer depths affect temporary works and plot interfaces.
Risks and decisions to resolve
| 1 | Building ahead of technical approval |
| 2 | Non-compliant materials or bedding |
| 3 | Missing test access once roads advance |
| 4 | As-built data incomplete for adoption |
What the package should leave ready
The package should leave sewers constructed, testable and recorded, with clear residual actions for adoption milestones and any outstanding connections.
When this kind of package is needed
This package usually applies when development drainage is intended for adoption under a Section 104 agreement rather than remaining private.
If you are assessing sewers constructed for adoption under a section 104 agreement on a housing or mixed-use development, share the information you have and we can help identify the right next step.
Discuss a Similar ProjectRelated services and technical reading
Explore section 104 contractors in Dartford, roads and sewers in Dartford for combined infrastructure, and attenuation systems in Dartford where storage feeds the adoptable network.
Similar project types
Have a similar project?
Have a similar project? Send us the location, drawings or scope and programme information you have. We can review the requirement and identify the appropriate next step.