Black & White Facilities / Service brief
Gullies and Surface Water
Blocked yard gullies, ponding at entrances and overflowing surface-water drains interrupt deliveries and create slip risks on a managed site. This page explains how gully clearance is scoped, what the site team should supply and when the surface-water route itself needs investigating. Reports from site staff guide the scope but are not a diagnosis.
Overview
Clearing a gully restores the inlet, nothing more. Whether the pipework beyond can carry the flow, whether falls and inlet positions are right and how the receiving system copes with heavy rain are separate questions a clean gully does not answer.
Our full service catalogue, including every individual service, is available across every listed sector and location. For one site or several, we agree the scope, access and programme around the buildings concerned.
What the work can include
An instruction can cover clearing gullies on a schedule, checking their visible condition, tracing where surface water goes and setting out repair or replacement options where a defect is found. The scope lists the gully points, describes how flow will be recorded and identifies the surface-water route, plus what is handed over or tested at the end. Repairs, design, testing and replacement fall outside it unless named.
On completion you hold a schedule of gully points, the flow observations and the route the water takes, with any limitation, contractor interface and next action stated.
Important decisions
Decide early whether the instruction is to clear inlets or to investigate the wider surface-water system; the two carry different scopes and costs. Fit that decision around the site's operating pattern and the client's route for approving extra work.
Before we visit
Before the visit we ask for a site plan, the areas that flood, when it happens relative to rainfall, gully positions, access, any vehicle or pedestrian restrictions and what is known about the connections. For an estate, name each site separately and keep references consistent so yards are not confused.
Gully positions, a history of overflow events, the plan and any access limits are the core information. For service yards and entrances, include the traffic and pedestrian controls in force.
How the work proceeds
The surface-water points are inspected, the agreed restrictions cleared, flow tested where conditions allow, defects logged and follow-on work recommended with a specific target. The gully schedule, flow results and route information let the client decide whether further inlet clearance is enough or downstream work is required.
What affects cost and timing
The number and type of gullies, the volume of silt or debris, traffic management, access, disposal and whether the downstream system is investigated all move the price. For a managed site or estate, tell us when the yard can be worked, who arranges access and any shutdown limits that apply.
Sector and property applications
Office car parks, school grounds, retail service yards and industrial estates all need gully work planned around vehicle access, rainfall behaviour and the movement of people and deliveries. The sector directory sets the requirement against each building type.
Local coverage
Coverage extends across Northumberland, Tyne and Wear, County Durham and Tees Valley, taking in Berwick-upon-Tweed, Alnwick, Morpeth, Hexham, Newcastle upon Tyne, Gateshead, Sunderland, Durham, Darlington, Hartlepool, Stockton-on-Tees, Middlesbrough and Redcar and Cleveland. Estate clients should keep each site's gully schedule, flow results and surface-water route in its own record. See every location.
Frequently asked questions
Why has a gully overflowed again after it was cleared?
Clearing deals with the blockage at the inlet. If the outlet is restricted, the pipe beyond has lost capacity or condition, the levels are wrong or rainfall exceeds what the system was built for, overflow returns. For an estate, hold each site's results separately so the next decision is well founded.
Do gullies connect to the foul drain?
In most cases no. Gullies generally take rainwater and foul drains take wastewater, but the connection on your site has to be confirmed from drawings or inspection, not assumed. Where investigation would affect occupiers or operations, settle access, shutdowns and the handover with retained contractors before the work is programmed.
Will clearing the inlets stop the flooding?
Sometimes. A cleared inlet restores local drainage, but flooding that keeps returning usually involves the falls, a downstream restriction, capacity or the route as a whole. The completion report should say what was covered, what could not be reached and what still needs doing.
What access does yard gully work need?
Clear vehicle or foot access to each gully, their positions, any traffic restrictions, drainage drawings for the area and how the work must fit around occupied yards, entrances and delivery slots. Planned programmes should use the findings to decide whether more gully work or related repairs are needed.
Knowledge and guidance
The guide to what causes recurring drain blockages helps distinguish an inlet that needs clearing from a system that needs investigating. The site assessment applies that reasoning to your building or estate, alongside operating hours, access and the client's approval route.
Related content and enquiry
Connected services are Drainage and Wastewater, Drain Cleaning and Maintenance, CCTV Drain Surveys and Planned Preventative Maintenance. The wider directory covers all services, maintenance, projects, sectors and locations.
Contact Black & White Facilities with the site or estate, gully positions, any flow results or drainage records you hold and the operating constraints on the yard. We will then define the client interface and scope without assuming a response time or an outcome.
Discuss the scope
Tell us what needs attention.
Share the site, the issue and any access requirements so we can discuss the next step.