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Data Requirements Library

This Data Requirements Library documents the terminology and categories used to classify and describe Environment Agency (EA) assets. It also documents the specific data attributes that are used to describe the properties of each Asset Type and its Element Types.

Asset Categories

The EA has identified different types of Asset. These Asset Types are grouped into Asset Category groupings, as listed below.

The Asset Complex Category is a special case because its Assets are used to define geospatial areas, not physical assets. Similarly, the Information Deliverables Category defines document types and attributes to be used in filenames.

You can explore each Asset Type further by clicking on its name. This will take you to a more detailed description which may be supported by photos and diagrams that highlight key elements. There is also a table which lists the Element Types and specific data attributes that are used to describe that Asset Type.

Data about each Asset Type, Element Type and their attributes can also be accessed in JSON or CSV. These formats can be directly queried by remote applications to support supplier-side automation.

Please read the Data Requirements Library in conjunction with the Environment Agency Employers Information Requirements.

The View History link at the top of the page gives you access older versions of the DRL content. Further details about these versions can be found on the Data Services Platform Forum.

Download Asset Categories

Aids to Navigation

Assets that are used to aid navigation in the marine and fluvial environment.

Created on 27-04-2021 | View history
Asset TypeDescriptionAsset CodeUniclass 2015Last Updated
BeaconA marker structure that is fixed either to land or piled into the seabed/riverbed and is used to show ships and boats where they can go and to warn them of danger.ABPr_40_10_90_07Updated on 17-05-2021 | View history
Boat LiftA machine which moves boats between bodies of water at two different elevations. It is an alternative to a lock or inclined plane.AFSs_80_50_92_08Updated on 17-05-2021 | View history
BoatrollerA bankside structure which incorporates rollers to allow small unpowered craft, such as canoes, to bypass a lock.ARSL_32_50_72Updated on 17-05-2021 | View history
BuoyA marker object that floats on the surface of the water and is used to show ships and boats where they can go and to warn them of danger.AUPr_40_10_90_10Updated on 17-05-2021 | View history
Canoe PassA channel of water designed to allow the bypass of locks by canoes and kayaks.ACSL_32_50_11Updated on 17-05-2021 | View history
Canoe Portage PointA prepared area designed to allow the ingress and egress of small boats, kayaks and canoes.APSL_32_50_12Updated on 17-05-2021 | View history
DockAn enclosed area of water used for loading, unloading, building or repairing ships. A dock may have control gates at one end to facilitate the drainage of water to create a dry dock.AOEn_30_85Updated on 17-05-2021 | View history
DolphinA man-made marine structure that extends above the water level and is not connected to shore.ADEn_32_85_24Updated on 17-05-2021 | View history
LandingA place for boats to wait or be temporarily parked before entering a lock.ALEn_32_50_46Updated on 17-05-2021 | View history
LockA chamber or stretch of channel enclosed by lock gates at each end, which allow the water level inside the lock to be adjusted.AKSL_80_70_11Updated on 17-05-2021 | View history
Lock IslandThe area of land between a lock and its associated water level control structure such as a weir or control gate.AISL_80_70_48Updated on 17-05-2021 | View history
MooringA place where a boat or vessel can be secured to stop it floating away.AMSL_32_50_53Updated on 17-05-2021 | View history
Navigation BoomA floating barrier strung across a navigable stretch of water to control or block navigation.ANPr_40_10_90_55Updated on 17-05-2021 | View history
Navigation SignageSignage in the marine and fluvial environment which provides information or warnings to aid navigation.AGPr_40_10_90Updated on 17-05-2021 | View history
SignalAn asset which sends signals (light, sound or radio) to ships at sea, such as fog signals or traffic control signals.ASPr_40_10_90_50Updated on 17-05-2021 | View history
Warning FlagA flag used to warn boats or vessels about danger.AWSs_40_10_30_93Updated on 17-05-2021 | View history

Amenities

Assets that contribute to the accessibility or usability of a location.

Created on 27-04-2021 | View history
Asset TypeDescriptionAsset CodeUniclass 2015Last Updated
Car Park or HardstandingAn area of prepared ground with either hardcore or tarmac used for parking vehicles.YCEn_80_45_85Updated on 17-05-2021 | View history
Information BoardA structure which is designed to convey information to people (typically visitors).YIPr_40_30_25Updated on 17-05-2021 | View history
Vehicle Access RoadA purpose built track or road that allows vehicular access to an asset or group of assets.YAEn_80_35_01Updated on 17-05-2021 | View history

Asset Complex

A grouping together of individual assets that can be considered as parts of a single site or complex with a high level purpose.

Created on 27-04-2021 | View history
Asset TypeDescriptionAsset CodeUniclass 2015Last Updated
Biodiversity and Environmental ConservationA group of associated assets which enhance or conserve biodiversity, habitats or the local environment in a certain area.IVSs_45_35_08Updated on 17-05-2021 | View history
Complex Beach StructureA collection of beach assets which work together to protect the coast from erosion.IBCo_32_55_20Updated on 17-05-2021 | View history
Complex DefenceA collection of assets which work together to provide flood defence or coastal protection functions.IDCo_32_55_30Updated on 17-05-2021 | View history
Complex StructureA collection of assets which work together to enable, restrict or affect the movement of water, people, fish, animals or materials.ISEn_32_85_30Updated on 17-05-2021 | View history
Control StructureA group of assets which make up a control structure, to control water levels or flow in a watercourse.ICCo_32_85Updated on 17-05-2021 | View history
Erosion ProtectionA group of assets which work together to reduce erosion a particular feature or area.IECo_32_55_27Updated on 17-05-2021 | View history
Fish FarmA place for artificial breeding, hatching, and rearing through the early life stages of animals for commercial and generic restocking purposes.IFCo_32_10_28Updated on 17-05-2021 | View history
Fish HatcheryA place for artificial breeding, hatching, and rearing through the early life stages of animals for conservation purposes.IICo_32_10_30Updated on 17-05-2021 | View history
Flood Alleviation SchemeA group of assets which work together to alleviate flooding to a defined area from a defined source.IQCo_32Updated on 17-05-2021 | View history
HarbourA group of assets which make up a harbour. A harbour is an area of water next to the coast, often sheltered from the sea by a wall, where ships and boats can shelter.IHCo_80_70_36Updated on 17-05-2021 | View history
Lock ComplexA group of associated assets which form a complex of locks, for example a series of locks.ILCo_32_85_50Updated on 17-05-2021 | View history
Monitoring StationA group of assets which make up a monitoring station. A monitoring station measures different parameters in the field depending on the type of monitoring station it is, such as:
- Rain Gauge;
- Borehole (measuring quality and / or quantity);
- Climate station measuring atmospheric conditions including temperature, wind speed and direction, net radiation, atmospheric pressure, humidity, air quality;
- Surface water quality.
IMCo_25_30Updated on 17-05-2021 | View history
Navigation ComplexA group of assets which work together in a defined location to aid or enable the navigation of waterways or coastlines.INCo_32_50Updated on 17-05-2021 | View history
Pumping StationA group of assets which make up a pumping station. A pumping station could be:
1. A groundwater pumping station abstracts groundwater and delivers it to a water body. A groundwater scheme can be made up of multiple pumping stations.
2. A Surface Water Pumping Station abstracts water from one water body and delivers it to a different water body. A surface water transfer scheme can be made up of multiple pumping stations.
IPCo_32_85_98Updated on 17-05-2021 | View history
Recreational ComplexA group of assets providing a recreational facility in a certain location.IACo_40Updated on 17-05-2021 | View history
ReservoirA group of assets which make up a reservoir. A reservoir is a large area for storing water which is created or enlarged by artificial means, and the associated impounding and control structures and assets.IRCo_32_85_70Updated on 17-05-2021 | View history
Tidal BarrierA group of assets which work together in a complex to provide a barrier to tidal flooding in an estuary or bay. A tidal barrier would usually includes assets such as control gates, central piers, a control building and any mechanical and electrical assets used to operate the control gates.ITCo_32_85_88Updated on 17-05-2021 | View history
Water Level and Flow Monitoring ComplexA group of assets making up a water level and flow monitoring complex, which is in place to monitor water levels and flow in a watercourse, tide levels, or surface water levels.IUCo_32_85_97Updated on 17-05-2021 | View history
Water Transfer SchemeA group of associated assets which transfer water from one catchment or waterbody to another.IWCo_55_70_20Updated on 17-05-2021 | View history

Beach Structure

Assets used to protect the coast from erosion.

Updated on 27-04-2021 | View history
Asset TypeDescriptionAsset CodeUniclass 2015Last Updated
BreakwaterA wall or piled barrier built out into the sea or waterway to protect a shore, harbour or asset from the force of waves, or water flow or motion.BBEn_32_85_10Updated on 17-05-2021 | View history
GroyneA linear structure extending from the shore into the sea that traps sediment moving along the shore, thus preventing longshore drift.BGEn_32_85_35Updated on 17-05-2021 | View history

Buildings and Compounds

Assets that are used to provide shelter for equipment, storage or personnel.

Created on 27-04-2021 | View history
Asset TypeDescriptionAsset CodeUniclass 2015Last Updated
Amenity BuildingA building designed and/or used primarily for the provision of amenities. Amenities are something which makes life more pleasant or comfortable for people.VYEn_40_05_68Updated on 17-05-2021 | View history
BoathouseA building designed and/or used for the storage and/or maintenance of boats.VBEn_30_85_07Updated on 17-05-2021 | View history
Control BuildingA building designed and/or used to house the controls for operational assets.VCEn_75_70_60Updated on 17-05-2021 | View history
GarageA building designed and/or used for the storage and/or maintenance of vehicles.VASL_90_50_33Updated on 17-05-2021 | View history
Gauging Station BuildingA building designed and/or used for the housing of apparatus, equipment and fixtures for measuring river levels and flow.VGEn_90_90_35Updated on 17-05-2021 | View history
Lab BuildingA building designed and/or used for laboratory activities.VLEn_25_30_40Updated on 17-05-2021 | View history
Maintenance BuildingA building designed for the maintenance of equipment and assets or elements.VMEn_30_60_50Updated on 17-05-2021 | View history
Monitoring BuildingA building designed and/or used for the housing of apparatus, equipment and fixtures for the purpose of monitoring the environment.VNEn_90_90_27Updated on 17-05-2021 | View history
Office BuildingA building containing offices where work is done.VFCo_20_15_58Updated on 17-05-2021 | View history
Pump HouseA building designed and used to house pumps and the controls and facilities which support their operation.VPEn_90_90_68Updated on 17-05-2021 | View history
Residential BuildingA building designed and/or used primarily for people to dwell in.VREn_45_10Updated on 17-05-2021 | View history
ShelterA place giving temporary protection from the elements.VSSs_20_10_70Updated on 17-05-2021 | View history
Storage LocationThe location where equipment, such as temporary barriers or mobile instrumentation, is stored.VECo_90_50_77Updated on 17-05-2021 | View history
Visitor CentreA building designed and/or used as a centre for providing information and facilities to members of the public.VVEn_40_75_94Updated on 17-05-2021 | View history
WatermillA building designed and/or used for the housing of machinery for converting potential energy of water into useful power.VTEn_30_80_96Updated on 17-05-2021 | View history

Channel

Assets that convey water.

Updated on 27-04-2021 | View history
Asset TypeDescriptionAsset CodeUniclass 2015Last Updated
Complex CulvertA covered channel or pipe which conveys a watercourse through an obstacle. A complex culvert has a cross section which is made of more than one material.CCEn_32_95_16Updated on 17-05-2021 | View history
Open ChannelA conduit in which water flows with a free surface, i.e. not culverted.CPEn_32_95_59Updated on 17-05-2021 | View history
Simple CulvertA covered channel or pipe which conveys a watercourse through an obstacle. A simple culvert has a cross section which is made of the same material throughout.CSEn_32_95_80Updated on 17-05-2021 | View history

Channel Crossings

Assets that allow access across a channel.

Created on 27-04-2021 | View history
Asset TypeDescriptionAsset CodeUniclass 2015Last Updated
BridgeA structure that spans a watercourse and allows the passage of road, rail, pedestrian and farm access. It also includes aqueducts.RBEn_80_94Updated on 17-05-2021 | View history
FordA shallow part of a watercourse that may be crossed on foot or by a vehicle in low flows.RFSL_32_50_30Updated on 17-05-2021 | View history
Utility Services CrossingA structure that spans a watercourse and allows a utility service to cross the watercourse.RUSs_20_10_30_65Updated on 17-05-2021 | View history

Defence

Asset that provide flood defence or coastal protection functions. These include both man-made and natural defences. Natural defences may include man-made elements to make them more effective or protect them from erosion.

Updated on 27-04-2021 | View history
Asset TypeDescriptionAsset CodeUniclass 2015Last Updated
Barrier BeachA sand or shingle bar above high tide, parallel to the coastline and usually separated from it by a lagoon.DAEn_32_85_06Updated on 17-05-2021 | View history
BeachA pebbly or sandy shore found at the coast.DBEn_32_65_06Updated on 17-05-2021 | View history
Bridge AbutmentA supporting structure at the end of a bridge span that also acts as a flood defence. It ties into other flood defences and completes the line of defence against high river levels.DGSs_20_50_10Updated on 17-05-2021 | View history
CliffA steep rock face, especially one that runs along the coast.DCCo_32_65_15Updated on 17-05-2021 | View history
Demountable DefenceSections of flood defence that are removable (e.g. for visual amenity or access reasons).DMSs_25_95_30Updated on 17-05-2021 | View history
DunesWind-blown sand mounds found along the coast.DDEn_32_65_75Updated on 17-05-2021 | View history
EmbankmentAn artificially raised, earthen ridge used in the fluvial, tidal and coastal environments for flood defence, erosion protection, or channel containment.DEEn_32_85_45Updated on 17-05-2021 | View history
Engineered High GroundRetained, engineered or otherwise modified ground along watercourses or the coastline, that is not covered by one of the other defence asset types.DREn_32_40_37Updated on 17-05-2021 | View history
Flood GateA gate providing access for pedestrians or vehicles through a flood defence, while maintaining flood protection when closed.DFSs_25_36_30_30Updated on 17-05-2021 | View history
Natural High GroundAny extent along a watercourse or coastline which completes the line of continuous defence, but has not been modified in any way, so does not qualify as any of the other defence asset types.DNEn_32_40_37Updated on 17-05-2021 | View history
PromenadeA paved public walking area along the coast.DPEn_80_40_66Updated on 17-05-2021 | View history
QuayA structure adjacent to or protruding into watercourse or the sea to load or unload boats.DQEn_32_50_69Updated on 17-05-2021 | View history
SpillwayA structure designed to allow the controlled overflow or release of water from a reservoir or flood storage area, or over flood defences.DSEn_32_85_82Updated on 17-05-2021 | View history
WallA wall which is raised above the surrounding land and acts as a barrier against flooding from rivers or the sea.DWEn_32_85_96Updated on 17-05-2021 | View history

Information Deliverables

Specific Information Deliverables scheduled in each project Information Delivery Plan (IDP) for each required delivery stage.
The *File Naming Attributes and *Information Purposes assets are not specific information deliverables but list the allowable values for different parts of the file names, and the purposes for which the the information may be used.

Updated on 27-04-2021 | View history
Asset TypeDescriptionAsset CodeUniclass 2015Last Updated
*File Naming AttributesLists of the allowable values for different parts of the file names, such as Author, Type and Delivery Stage, according to the required file-naming convention.n/an/aCreated on 27-04-2021 | View history
*Information PurposesThe purposes that the information will or may be used to support.n/an/aUpdated on 14-06-2021 | View history
Asset ManagementInformation required relating to asset management.J0000PM_80Created on 27-04-2021 | View history
Commercial Financial ProductsAny commercial financial products generated in the delivery of the project.F0000PM_50Created on 27-04-2021 | View history
Commissioning and Performance Evaluation (GSL)Information required relating to commissioning and performance evaluation including Government Soft Landings (GSL).M0000PM_35Created on 27-04-2021 | View history
Communications and EngagementInformation relating to communications, engagement and consultation.N0000PM_80_20Updated on 14-06-2021 | View history
DesignAll supporting and analytical information relating to the design for the project outcome including calculations and justifications.B0000PM_40_30Created on 27-04-2021 | View history
Economic ViabilityInformation required relating to economic viability.H0000PM_50_30Created on 27-04-2021 | View history
EnvironmentalAll supporting and analytical information relating to the environmental considerations of the design for the project outcome including assessments and agreements.C0000PM_30_30Created on 27-04-2021 | View history
Health and SafetyAll Health and Safety documentation relating to the project.K0000PM_35_50Created on 27-04-2021 | View history
ModellingInformation required relating to hydraulic and fluvial modelling.L0000PM_40_35Created on 27-04-2021 | View history
Permissions, ownership and responsibilityRecords of any approvals granted.I0000PM_40_50Created on 27-04-2021 | View history
PlanningInformation required relating to planning.R0000PM_80_10Created on 27-04-2021 | View history
Procurement ProductsInformation required relating to supplier procurement, tender and appointment.G0000PM_50_50Created on 27-04-2021 | View history
Project ManagementAny project management related information generated in the delivery of the project.E0000PM_10_10Created on 27-04-2021 | View history
Site and Asset ConditionsPhysical information about the project area (discovery).A0000PM_60_10Created on 27-04-2021 | View history
Site-based worksAll information relating to the works carried out on site, including construction.D0000PM_60_10Created on 27-04-2021 | View history

Instruments

Assets used to measure water level and flow.

Created on 27-04-2021 | View history
Asset TypeDescriptionAsset CodeUniclass 2015Last Updated
CCTV Camera SystemA CCTV (Closed Circuit Television) camera or group of connected CCTV cameras at a site and the associated onsite equipment.NCSs_75_40_53_86Updated on 17-05-2021 | View history
Flood Warning SystemA device or mechanism situated in a flood risk area that warns people in the area of imminent flooding.NFSs_75_60_55_30Updated on 17-05-2021 | View history
Gauge BoardA board with numeral markings, used to measure and indicate the depth or level of water in a water body.NGPr_80_51_70_96Updated on 17-05-2021 | View history
InstrumentationA device installed in a particular location to measure physical quantities.NIPr_80_51Updated on 17-05-2021 | View history
PiezometerAn instrument for measuring pressure or depth in groundwater.NPPr_80_51_51_62Updated on 17-05-2021 | View history
Rain GaugeAn instrument for collecting and measuring the amount of precipitation falling in a particular location.NRPr_75_50_52Updated on 17-05-2021 | View history
Sample or Survey PointA known point in the physical world from where correct orientation or a sample can be taken.NSZz_35_80Updated on 17-05-2021 | View history
Telemetry SystemA telemetry system communicates data from an asset to a receiving system.NTSs_75_70_54_03Updated on 17-05-2021 | View history

Land

Areas of land that are involved in water management.

Updated on 27-04-2021 | View history
Asset TypeDescriptionAsset CodeUniclass 2015Last Updated
MudflatsCoastal wetlands that form in intertidal areas where sediments have been deposited by tides or rivers.LMEn_32_65_55Updated on 17-05-2021 | View history
Salt MarshMudflats that have built up to a higher elevation so that vegetation is able to colonise.LSCo_32_65_75Updated on 17-05-2021 | View history
Water Storage AreaAn area of land that is deliberately engineered to hold water where it wouldn't naturally accumulate.LWCo_55_15_96Updated on 17-05-2021 | View history

MEICA

Mechanical, electrical, instrumentation, control and automation assets.

Created on 27-04-2021 | View history
Asset TypeDescriptionAsset CodeUniclass 2015Last Updated
Automation ControlsEquipment used as an automated method of controlling a structure such as a pumping station.MTSs_75_70Updated on 17-05-2021 | View history
Engine AssemblyThe assembled elements of a machine which burns or consumes fuel to perform mechanical work.MESs_85_50_65_40Updated on 14-06-2021 | View history
GeneratorA device that converts movement (mechanical energy) into electrical power for use in an external circuit.MJPr_60_70_65_34Updated on 17-05-2021 | View history
High Voltage Electrical EquipmentElectrical equipment with a high voltage, usually 1000V or more.MHSs_70_30_35Updated on 17-05-2021 | View history
Hydraulic System AssemblyThe assembled elements of a system that uses pressurised hydraulic fluid to power hydraulic machinery.MYSs_85_50_65_38Updated on 17-05-2021 | View history
Motor Control Centre ControlsControl panels that operate motorised equipment such as pumps or gates.MCPr_75_50_18_53Updated on 17-05-2021 | View history
Power TransmissionThe asset(s) used for the movement of energy from its source to the location where it is used to perform its useful work.MOSs_85_50_65Updated on 17-05-2021 | View history
Pressure System AssemblyThe assembled elements of a pressure system, which includes all plant/systems that contain a 'relevant fluid' under pressure.MDSs_55_20_60_15Updated on 17-05-2021 | View history
Pump AssemblyThe assembled elements of a device that raises, transports or compresses fluids by mechanical action.MPPr_65_53Updated on 17-05-2021 | View history
Sand Bagging EquipmentEquipment used to fill sand bags for use in Incident Response.MKPr_40_70_66_75Updated on 17-05-2021 | View history
Solar FarmA group of photovoltaic solar panels that supply electricity to the national grid; it does not directly supply electricity to an asset.MSSs_70_10_70_35Updated on 17-05-2021 | View history
Wind Power GeneratorA stand alone power generator system for collecting the wind's kinetic energy.MVSs_70_10_70_98Updated on 17-05-2021 | View history

Public Safety

Environment Agency managed assets that are used in the protection of public safety.

Created on 27-04-2021 | View history
Asset TypeDescriptionAsset CodeUniclass 2015Last Updated
PSRA Tree SiteA group of PSRA (Public Safety Risk Assessment) measures at a tree or group of trees that are used to guard public safety and control any risks to public safety caused by those trees.KTCo_32_65_96Updated on 17-05-2021 | View history
Public Safety Control SystemA group of measures at an asset or group of assets that are used to guard public safety and control any risks to public safety caused by that asset.KPCo_75Updated on 17-05-2021 | View history

Structure

Assets used to enable, restrict or affect the movement of water, people, fish, animals or materials.

Updated on 27-04-2021 | View history
Asset TypeDescriptionAsset CodeUniclass 2015Last Updated
BoreholeA shaft bored into the ground that is used to extract groundwater via a pump, or to monitor and/or measure water quality and/or quantity.SASs_15_95_15_10Updated on 17-05-2021 | View history
CablewayA system used for transporting items from point A to B via a cable suspended between two towers or structures.TASL_80_20_13Updated on 17-05-2021 | View history
Central PierA significant central supporting structure built in a channel.TFSs_20_50_20Updated on 17-05-2021 | View history
Control GateAn adjustable gated structure used to control water levels and flow in watercourses, for water flow management, flood control and navigation.SGEn_32_85_15Updated on 17-05-2021 | View history
Debris BoomA floating barrier across a watercourse designed to catch debris which could interfere with the operation of an asset.SBPr_40_70_27_22Updated on 17-05-2021 | View history
Debris ScreenA screen that reduces the amount of trash and debris entering culverts, outfalls or channels (where it could cause a blockage).SREn_32_85_23Updated on 17-05-2021 | View history
Draw Off TowerA vertical tubular structure with one or more openings used for removing water from reservoirs and diverting it elsewhere.SDEn_32_85_25Updated on 17-05-2021 | View history
Eel PassA structure that enables eels to bypass an obstacle in a channel such as a lock, weir or control gate.SESs_45_75_27Updated on 17-05-2021 | View history
Fish PassA structure that enables fish to bypass an obstacle in a channel such as a lock, weir or control gate.SFSs_45_75_30Updated on 17-05-2021 | View history
Fish RefugeA floating wire mesh refuge providing cover for smaller fish.TEPr_45_28_30_30Updated on 17-05-2021 | View history
Fish or Eel BarrierA barrier that prevents the movement of aquatic life into areas that may jeopardise their survival.TBSs_45_75_25_05Updated on 17-05-2021 | View history
Fishing CageA system that confines fish or shellfish in a mesh enclosure. Must be fixed in location.TCEn_32_10_29Updated on 17-05-2021 | View history
Fishing PlatformA horizontal construction on the bank of a reservoir, river or lake to allow safe and inclusive access primarily for fishing, usually protruding slightly over the water.TPEn_32_50_96Updated on 17-05-2021 | View history
In Channel StoplogsAn adjustable structure used to control water levels and flow in watercourses, for water flow management, flood control, and navigation.SCSs_55_70_99_84Updated on 17-05-2021 | View history
Inspection ChamberAn opening to a confined space such as a culverted watercourse or underground services, providing access for testing, inspecting, maintaining and clearing blockages.SNPr_65_52_01Updated on 17-05-2021 | View history
JettyA solid structure that projects from the land out into a body of water, providing access to deeper water or to moored vessels. It must prevent currents and tides waves passing through it (otherwise use Pier).SJEn_32_50_44Updated on 17-05-2021 | View history
Lamprey PassA structure that enables lampreys to bypass an obstacle in a channel such as a lock, weir or control gate.SLSs_45_75_44Updated on 17-05-2021 | View history
OutfallThe structure at the point where surface water drains discharge into a watercourse or the sea.SUEn_32_85_59Updated on 17-05-2021 | View history
PierA raised structure that projects from the land over a body of water, providing access to deeper water or to moored vessels. Often on piles or pillars, it must allow some water currents and/or waves to pass beneath (otherwise use Jetty).SOEn_32_50_63Updated on 17-05-2021 | View history
RampA sloped access route between two different levels.TREF_35_20_30Updated on 17-05-2021 | View history
Sand TrapA structure for aerating groundwater. Also used to trap sand and soil particles.SXEn_32_85_75Updated on 17-05-2021 | View history
Security ScreenA screen which prevents unauthorised access to culverts, outfalls and channels.SYPr_25_96_35_37Updated on 17-05-2021 | View history
SlipwayA slope or ramp leading down into water (channel or sea) used for launching/landing boats.TSSL_32_50_79Updated on 17-05-2021 | View history
StepsA series of treads and risers as an access route between two different levels (not a ladder).TTSs_35_10_25Updated on 17-05-2021 | View history
Stilling BasinA depressed area in a channel or reservoir that is deep enough to reduce the velocity of the water before it passes further downstream.STEn_32_85_84Updated on 17-05-2021 | View history
Stilling WellA chamber that is connected to a water body by one or more inlets. The water level in the stilling well will rise and fall with the level in the water body, but will not be subject to the turbulence that may be present in the water body, allowing for more accurate level measurement.SISL_32_85_84Updated on 14-06-2021 | View history
Surface Water TankA buried tank for collecting and storing surface water for further use or attenuation.SKSs_50_70_85_06Updated on 17-05-2021 | View history
Vortex Flow ControlA flow control structure which uses a vortex flow control device to control the flow.SHSL_32_85_94Updated on 17-05-2021 | View history
Water BafflesAn obstruction placed in the flow of water in order to redirect all or partial flow and create a variation in flow velocities.TLSs_55_70_99_96Updated on 17-05-2021 | View history
Water Distribution PipelineThe pipe work attached to a pumping station that delivers water to a water body. A pipeline may be attached to multiple pumping stations.TDEn_55_15_72Updated on 17-05-2021 | View history
WeirA low barrier that is built across the width of a watercourse to control the flow or upstream water level.SWEn_32_85_97Updated on 17-05-2021 | View history
WellA shaft sunk into the ground for collecting groundwater.TWEn_32_85_98Updated on 17-05-2021 | View history