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 Exchange Information Requirements.

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

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Quick Links

The following links provide quick access to the complete lists of Asset Categories, Asset Types, Elements, Attributes and Picklists defined in the currently-selected version of the DRL data.

Asset Categories

Asset Type	Description	Asset Code	Uniclass 2015	Updates
Beacon	A 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. A beacon may be lighted or unlighted.	AB	Pr_40_10_90_07	10-03-2023 View history Request changes
Boat Lift	A machine which moves boats between bodies of water at two different elevations. It is an alternative to a lock or inclined plane.	AF	Ss_80_50_92_08	17-05-2021 View history Request changes
Boatroller	A bankside structure which incorporates rollers to allow small unpowered craft, such as canoes, to bypass a lock.	AR	SL_32_50_72	17-05-2021 View history Request changes
Buoy	A 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. A buoy is anchored to the bed of the sea or river and may be lighted or unlighted.	AU	Pr_40_10_90_10	10-03-2023 View history Request changes
Canoe Pass	A channel of water designed to allow the bypass of locks by canoes and kayaks.	AC	SL_32_50_11	17-05-2021 View history Request changes
Canoe Portage Point	A prepared area designed to allow the ingress and egress of small boats, kayaks and canoes.	AP	SL_32_50_12	17-05-2021 View history Request changes
Dock	An 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.	AO	En_30_85	17-05-2021 View history Request changes
Dolphin	A man-made marine structure that extends above the water level and is not connected to shore. It is usually piled into the river or sea bed. Dolphins may be used as a temporary tethering point, a structure for housing navigation aids or for protecting other structures from ship impacts.	AD	En_32_85_24	10-03-2023 View history Request changes
Landing	A place for boats to wait or be temporarily parked before entering a lock.	AL	En_32_50_46	17-05-2021 View history Request changes
Lock	A chamber or stretch of channel enclosed by lock gates at each end, which allow the water level inside the lock to be adjusted. This allows boats, ships and other watercraft to transfer between two bodies of water at different levels.	AK	SL_80_70_11	10-03-2023 View history Request changes
Lock Island	The area of land between a lock and its associated water level control structure such as a weir or control gate. Lock Islands are often formed using sheet piling or concrete retaining walls.	AI	SL_80_70_48	10-03-2023 View history Request changes
Mooring	A place where a boat or vessel can be secured to stop it floating away. A Mooring asset should be used where the main purpose of the asset is for mooring boats or vessels. Where a boat or vessel needs to moor for a short time to use an asset, such as at a lock, a Mooring Point should be added as an element of that asset.	AM	SL_32_50_53	10-03-2023 View history Request changes
Navigation Boom	A floating barrier strung across a navigable stretch of water to control or block navigation.	AN	Pr_40_10_90_55	17-05-2021 View history Request changes
Navigation Signage	Signage in the marine and fluvial environment which provides information or warnings to aid navigation.	AG	Pr_40_10_90	17-05-2021 View history Request changes
Signal	An asset which sends signals (light, sound or radio) to ships at sea, such as fog signals or traffic control signals.	AS	Pr_40_10_90_50	17-05-2021 View history Request changes
Warning Flag	A flag used to warn boats or vessels about danger.	AW	Ss_40_10_30_93	17-05-2021 View history Request changes

Asset Type	Description	Asset Code	Uniclass 2015	Updates
Car Park or Hardstanding	An area of prepared ground with either hardcore or tarmac used for parking vehicles.	YC	En_80_45_85	17-05-2021 View history Request changes
Information Board	A structure which is designed to convey information to people (typically visitors).	YI	Pr_40_30_25	17-05-2021 View history Request changes
Pathway	A route, way or track laid out for walking or travelling on (but not with motor vehicles - see Vehicle Access Road).	YP	En_80_40	31-08-2021 View history Request changes
Vehicle Access Road	A purpose built track or road that allows vehicular access to an asset or group of assets.	YA	En_80_35_01	17-05-2021 View history Request changes

Asset Type	Description	Asset Code	Uniclass 2015	Updates
Biodiversity and Environmental Conservation	A group of associated assets which enhance or conserve biodiversity, habitats or the local environment in a certain area.	IV	Ss_45_35_08	17-05-2021 View history Request changes
Complex Beach Structure	A collection of beach assets which work together to protect the coast from erosion.	IB	Co_32_55_20	17-05-2021 View history Request changes
Complex Defence	A collection of assets which work together to provide flood defence or coastal protection functions.	ID	Co_32_55_30	17-05-2021 View history Request changes
Complex Structure	A collection of assets which work together to enable, restrict or affect the movement of water, people, fish, animals or materials.	IS	En_32_85_30	17-05-2021 View history Request changes
Control Structure	A group of assets which make up a control structure, to control water levels or flow in a watercourse.	IC	Co_32_85	05-09-2022 View history Request changes
Erosion Protection	A group of assets which work together to reduce erosion at a particular feature or area.	IE	Co_32_55_27	10-03-2023 View history Request changes
Fish Farm	A place for artificial breeding, hatching, and rearing through the early life stages of animals for commercial and generic restocking purposes.	IF	Co_32_10_28	17-05-2021 View history Request changes
Fish Hatchery	A place for artificial breeding, hatching, and rearing through the early life stages of animals for conservation purposes.	II	Co_32_10_30	17-05-2021 View history Request changes
Flood Alleviation Scheme	A group of assets which work together to alleviate flooding to a defined area from a defined source.	IQ	Co_32	17-05-2021 View history Request changes
Harbour	A 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.	IH	Co_80_70_36	17-05-2021 View history Request changes
Lock Complex	A group of associated assets which form a complex of locks, for example a series of locks.	IL	Co_32_85_50	17-05-2021 View history Request changes
Monitoring Station	A 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.	IM	Co_25_30	17-05-2021 View history Request changes
Navigation Complex	A group of assets which work together in a defined location to aid or enable the navigation of waterways or coastlines.	IN	Co_32_50	17-05-2021 View history Request changes
Pumping Station	A 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.	IP	Co_32_85_98	10-03-2023 View history Request changes
Recreational Complex	A group of assets providing a recreational facility in a certain location.	IA	Co_40	17-05-2021 View history Request changes
Reservoir	A 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.	IR	Co_32_85_70	05-09-2022 View history Request changes
Tidal Barrier	A 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 include assets such as control gates, central piers, a control building and any mechanical and electrical assets used to operate the control gates.	IT	Co_32_85_88	10-03-2023 View history Request changes
Water Level and Flow Monitoring Complex	A 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.	IU	Co_32_85_97	17-05-2021 View history Request changes
Water Transfer Scheme	A group of associated assets which transfer water from one catchment or waterbody to another.	IW	Co_55_70_20	17-05-2021 View history Request changes

Asset Type	Description	Asset Code	Uniclass 2015	Updates
Breakwater	A 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.	BB	En_32_85_10	05-09-2022 View history Request changes
Groyne	A linear structure extending from the shore into the sea that traps sediment moving along the shore, thus preventing longshore drift.	BG	En_32_85_35	02-12-2022 View history Request changes

Asset Type	Description	Asset Code	Uniclass 2015	Updates
Amenity Building	A building designed and/or used primarily for the provision of amenities. Amenities are something which makes life more pleasant or comfortable for people. Examples include Toilet Blocks, Food Kiosks, Cafes, Indoor Picnic Areas.	VY	En_40_05_68	10-03-2023 View history Request changes
Boathouse	A building designed and/or used primarily for the storage and/or maintenance of boats.	VB	En_30_85_07	03-02-2023 View history Request changes
Control Building	A building designed and/or used primarily to house the controls for operational assets.	VC	En_75_70_60	03-02-2023 View history Request changes
Garage	A building designed and/or used primarily for the storage and/or maintenance of vehicles.	VA	SL_90_50_33	03-02-2023 View history Request changes
Gauging Station Building	A building designed and/or used primarily for the housing of apparatus, equipment and fixtures for measuring river levels and flow.	VG	En_90_90_35	03-02-2023 View history Request changes
Lab Building	A building designed and/or used primarily for laboratory activities.	VL	En_25_30_40	03-02-2023 View history Request changes
Maintenance Building	A building designed and/or used primarily for the maintenance of equipment and assets or elements.	VM	En_30_60_50	03-02-2023 View history Request changes
Monitoring Building	A building designed and/or used primarily for the housing of apparatus, equipment and fixtures for the purpose of monitoring the environment. Does not include Gauging Stations that monitor river level and flow.	VN	En_90_90_27	10-03-2023 View history Request changes
Office Building	A building primarily containing offices where work is done. This does not include Office Buildings that are managed by Facilities Management.	VF	Co_20_15_58	10-03-2023 View history Request changes
Precipitation Compound	A demarked space which is designed and maintained specifically to facilitate the measurement of precipitation.	VQ	En_32_40_65	03-02-2023 View history Request changes
Pump House	A building designed and used primarily to house pumps and the controls and facilities which support their operation.	VP	En_90_90_68	03-02-2023 View history Request changes
Residential Building	A building designed and/or used primarily for people to dwell in.	VR	En_45_10	03-02-2023 View history Request changes
Shelter	A place giving temporary protection from the elements, e.g. Fish Huts, Animal Shelters, Bird Hides.	VS	Ss_20_10_70	10-03-2023 View history Request changes
Storage Location	The location where equipment, such as temporary barriers or mobile instrumentation, is stored.	VE	Co_90_50_77	03-02-2023 View history Request changes
Visitor Centre	A building designed and/or used primarily as a centre for providing information and facilities to members of the public.	VV	En_40_75_94	03-02-2023 View history Request changes
Watermill	A building designed and/or used primarily for the housing of machinery for converting potential energy of water into useful power. Does not include Gauging Stations that monitor river level and flow.	VT	En_30_80_96	10-03-2023 View history Request changes

Asset Type	Description	Asset Code	Uniclass 2015	Updates
Complex Culvert	A 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, e.g. masonry walls with a concrete soffit. There is sometimes confusion between culverts and bridges. The key test is whether a culvert inspection is required; if not the structure should be classified as a bridge.	CC	En_32_95_16	10-03-2023 View history Request changes
Natural Spring	A point at which groundwater flows from an aquifer at the Earth's surface.	CN	Co_32_65_82	02-12-2022 View history Request changes
Open Channel	A conduit in which water flows with a free surface, i.e. not culverted.	CP	En_32_95_59	02-12-2022 View history Request changes
Simple Culvert	A 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 (for example: concrete pipe, concrete box section, brick arched). There is sometimes confusion between culverts and bridges. The key test is whether a culvert inspection is required; if not the structure should be classified as a bridge.	CS	En_32_95_80	10-03-2023 View history Request changes

Asset Type	Description	Asset Code	Uniclass 2015	Updates
Bridge	A structure that spans a watercourse and allows the passage of road, rail, pedestrian and farm access. It also includes aqueducts. If the abutments of the bridge form part of the flood defence they need to be recorded as a separate asset, not an abutment element of the bridge.	RB	En_80_94	10-03-2023 View history Request changes
Ford	A shallow part of a watercourse that may be crossed on foot or by a vehicle in low flows. These can occur naturally or can be man-made.	RF	SL_32_50_30	10-03-2023 View history Request changes
Utility Services Crossing	A structure that spans a watercourse and allows a utility service to cross the watercourse. This can be either above (e.g. a gantry, pipe or service conduit suspended over the channel) or below the channel (e.g. a pipe or service conduit buried under the channel bed).	RU	Ss_20_10_30_65	10-03-2023 View history Request changes

Asset Type	Description	Asset Code	Uniclass 2015	Updates
Barrier Beach	A sand or shingle bar above high tide, parallel to the coastline and usually separated from it by a lagoon. Barrier beaches that protect the land behind them from flooding and/or erosion.	DA	En_32_85_06	10-03-2023 View history Request changes
Beach	A pebbly or sandy shore found at the coast. Beaches that protect the land behind them from flooding and/or erosion.	DB	En_32_65_06	10-03-2023 View history Request changes
Bridge Abutment	A 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. If the bridge to which an abutment belongs is also of interest it will also have to be defined as a Bridge asset (without duplicating the abutment element).	DG	Ss_20_50_10	10-03-2023 View history Request changes
Cliff	A steep rock face, especially one that runs along the coast. Cliffs that protect the land behind them from flooding and/or erosion.	DC	Co_32_65_15	10-03-2023 View history Request changes
Demountable Defence	Sections of flood defence that are removable (e.g. for visual amenity or access reasons). The removable sections must be designed to fit, and be used in, one particular location/site. There will usually be fixings on site, such as holes to bolt posts into or slots in flood walls for flood boards to fit into. This includes flood boards in doorways/driveways that formally form part of the line of defence. Mobile temporary barriers which can be deployed in multiple locations and are not site-specific are NOT included in this asset type.	DM	Ss_25_95_30	10-03-2023 View history Request changes
Dunes	Wind-blown sand mounds found along the coast which can provide a flood defence and/or erosion protection function.	DD	En_32_65_75	10-03-2023 View history Request changes
Embankment	Also known as a levee or dyke. An artificially raised, earthen ridge used in the fluvial, tidal and coastal environments for flood defence, erosion protection, or channel containment. Includes embankments with other primary purposes, such as transport embankments, if they also provide a flood defence and erosion protection function. Also covers embankment dams. Natural ridges of high ground should be classified as natural high ground. Embankments should be defined as separate assets where the elements in an embankment profile change significantly in type, form, material or geometry.	DE	En_32_85_45	10-03-2023 View history Request changes
Engineered High Ground	Retained, engineered or otherwise modified ground along watercourses or the coastline, that is not covered by one of the other defence asset types. Only covers cases where the top of the retaining structure is no higher than the ground behind it, therefore it is not considered a raised flood defence such as a flood wall or embankment. Although it may still provide some flood risk management benefit through retaining the ground or preventing below-ground flooding through underground services and basements. Examples of engineered high ground include river frontage walls or sea frontage walls which are no taller than the ground behind them. If the retaining structure is taller than the ground behind it, it is considered a raised flood defence and should be classified as a flood wall or embankment. If the retained ground acts as a quay or promenade, it should be classified as such.	DR	En_32_40_37	10-03-2023 View history Request changes
Flood Gate	A gate providing access for pedestrians or vehicles through a flood defence, while maintaining flood protection when closed.	DF	Ss_25_36_30_30	02-12-2022 View history Request changes
Natural High Ground	Any 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.	DN	En_32_40_37	17-05-2021 View history Request changes
Promenade	A paved public walking area along the coast which also provides a flood defence and/or erosion protection function.	DP	En_80_40_66	10-03-2023 View history Request changes
Quay	A structure adjacent to or protruding into watercourse or the sea to load or unload boats. Can also provide a line of defence against flooding. Do not use Quay if the asset's primary function is a breakwater; use Breakwater.	DQ	En_32_50_69	10-03-2023 View history Request changes
Spillway	A structure designed to allow the controlled overflow or release of water from a reservoir or flood storage area, or over flood defences. It allows excess water to overflow without damaging the water retaining structure (dam or flood defences). Spillways are defences in their own right and therefore need to snap to defences both upstream and downstream, and cannot be an additional defence parallel with a different defence type.	DS	En_32_85_82	10-03-2023 View history Request changes
Wall	A wall which is raised above the surrounding land and acts as a barrier against flooding from rivers or the sea. Does not include walls which only retain earth and are not higher than the ground behind them. These are classified as engineered high ground. Includes other raised walls that may not have been constructed as flood walls, if they act as a flood defence and form part of a line of flood defences. For example, a garden wall or wall of a building which has been designated as a flood defence. Also includes walls that have been constructed as dams.	DW	En_32_85_96	10-03-2023 View history Request changes

Asset Type	Description	Asset Code	Uniclass 2015	Updates
*File Naming Attributes	Lists 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/a	n/a	27-04-2021 View history Request changes
*Information Purposes	The purposes that the information will or may be used to support.	n/a	n/a	14-06-2021 View history Request changes
Asset Management	Information required relating to asset management.	J0000	PM_80	27-04-2021 View history Request changes
Commercial Financial Products	Any commercial financial products generated in the delivery of the project.	F0000	PM_50	27-04-2021 View history Request changes
Commissioning and Performance Evaluation (GSL)	Information required relating to commissioning and performance evaluation including Government Soft Landings (GSL).	M0000	PM_35	27-04-2021 View history Request changes
Communications and Engagement	Information relating to communications, engagement and consultation.	N0000	PM_80_20	14-06-2021 View history Request changes
Design	All supporting and analytical information relating to the design for the project outcome including calculations and justifications.	B0000	PM_40_30	27-04-2021 View history Request changes
Economic Viability	Information required relating to economic viability.	H0000	PM_50_30	27-04-2021 View history Request changes
Environmental	All supporting and analytical information relating to the environmental considerations of the design for the project outcome including assessments and agreements.	C0000	PM_30_30	27-04-2021 View history Request changes
Health and Safety	All Health and Safety documentation relating to the project.	K0000	PM_35_50	27-04-2021 View history Request changes
Modelling	Information required relating to hydraulic and fluvial modelling.	L0000	PM_40_35	27-04-2021 View history Request changes
Permissions, ownership and responsibility	Records of any approvals granted.	I0000	PM_40_50	27-04-2021 View history Request changes
Planning	Information required relating to planning.	R0000	PM_80_10	27-04-2021 View history Request changes
Procurement Products	Information required relating to supplier procurement, tender and appointment.	G0000	PM_50_50	27-04-2021 View history Request changes
Project Management	Any project management related information generated in the delivery of the project.	E0000	PM_10_10	27-04-2021 View history Request changes
Site and Asset Conditions	Physical information about the project area (discovery).	A0000	PM_60_10	27-04-2021 View history Request changes
Site-based works	All information relating to the works carried out on site, including construction.	D0000	PM_60_10	27-04-2021 View history Request changes

Asset Type	Description	Asset Code	Uniclass 2015	Updates
CCTV Camera System	A CCTV (Closed Circuit Television) camera or group of connected CCTV cameras at a site and the associated onsite equipment. Does not include any offsite remote monitoring equipment or software. For the purpose of monitoring an EA asset. Not security cameras on buildings.	NC	Ss_75_40_53_86	10-03-2023 View history Request changes
Flood Warning System	A device or mechanism situated in a flood risk area that warns people in the area of imminent flooding. May consist of lights, alarms or signage, or a combination.	NF	Ss_75_60_55_30	10-03-2023 View history Request changes
Gauge Board	A board with numeral markings, used to measure and indicate the depth or level of water in a water body such as a river, reservoir, dock, harbour or ford.	NG	Pr_80_51_70_96	10-03-2023 View history Request changes
Instrumentation	A device or connected system of devices to measure physical quantities in a particular location or relating to a particular asset. Examples of physical quantities include level, flow, temperature, position, pressure. Instrumentation may stand alone (to measure the environment) or may be installed alongside another asset (to measure physical quantities relating to that asset). Where instrumentation stands alone it should be grouped by the physical quantity being measured, e.g. one asset consisting of level instrumentation and one asset consisting of flow instrumentation. Where instrumentation is measuring physical quantities relating to another asset, it should be grouped by the asset it is associated with and not by what is being measured, e.g. one asset for all the instrumentation associated to pump 1 and another asset for all the instrumentation associated to pump 2. Does not include mobile or portable instruments or measuring equipment.	NI	Pr_80_51	10-03-2023 View history Request changes
Piezometer	An instrument for measuring pressure or depth in groundwater.	NP	Pr_80_51_51_62	02-12-2022 View history Request changes
Sample or Survey Point	A known point in the physical world from where correct orientation or a sample can be taken. Usually marked in some way with a Datum Plate, Marker or Peg.	NS	Zz_35_80	10-03-2023 View history Request changes
Telecommunications	A fixed wire system that, via send and receive equipment, allows voice or data transmission from a fixed location to the receiving instrumentation. The system consists of two way communication cables and a master socket.	NL	Ss_75_10_21_88	05-09-2022 View history Request changes
Telemetry System	A telemetry system communicates data from an asset to a receiving system.	NT	Ss_75_70_54_03	05-09-2022 View history Request changes

Asset Type	Description	Asset Code	Uniclass 2015	Updates
Mudflats	Coastal wetlands that form in intertidal areas where sediments have been deposited by tides or rivers. Mudflats are usually covered at high tide, and lower in the intertidal zone than salt marshes. They are a natural part of the coastal environment that provide habitat and have an effect on water management.	LM	En_32_65_55	10-03-2023 View history Request changes
Salt Marsh	Mudflats that have built up to a higher elevation so that vegetation is able to colonise. Salt marshes lie just above the usual high tide line, though may be covered by exceptionally high tides. They are a natural part of the coastal environment that provide habitat and have an effect on water management.	LS	Co_32_65_75	10-03-2023 View history Request changes
Water Storage Area	An area of land that is deliberately engineered to hold water where it wouldn't naturally accumulate. For example, if a reservoir is created by constructing a dam, the area of land that could fill with water as a result would be the Water Storage Area. Or if an area of land is engineered to form a basin and water is diverted into it to be held for any length of time, this area of land is a Water Storage Area. Other examples include areas of land adjacent to watercourses where control gates are used to deliberately fill when rivers are high or sediment ponds used to capture sediment and protect the water quality of adjacent watercourses. Does not include natural lakes or ponds unless they are modified to store more water than they would naturally.	LW	Ss_55_15_30_02	10-03-2023 View history Request changes

Asset Type	Description	Asset Code	Uniclass 2015	Updates
Automation Controls	Equipment used as an automated method of controlling a structure such as a pumping station.	MT	Ss_75_70	17-05-2021 View history Request changes
Engine Assembly	The assembled elements of a machine which burns or consumes fuel to perform mechanical work.	ME	Ss_85_50_65_40	14-06-2021 View history Request changes
Generator	A device that converts movement (mechanical energy) into electrical power for use in an external circuit. Does not include wind or hydro turbines, which are classified separately.	MJ	Pr_60_70_65_34	10-03-2023 View history Request changes
High Voltage Electrical Equipment	Electrical equipment with a high voltage, usually 1000V or more.	MH	Ss_70_30_35	10-03-2023 View history Request changes
Hydraulic System Assembly	The assembled elements of a system that uses pressurised hydraulic fluid to power hydraulic machinery.	MY	Ss_85_50_65_38	17-05-2021 View history Request changes
Motor Control Centre Controls	Control panels that operate motorised equipment such as pumps or gates.	MC	Pr_75_50_18_53	17-05-2021 View history Request changes
Power Transmission	The asset(s) used for the movement of energy from its source to the location where it is used to perform its useful work.	MO	Ss_85_50_65	17-05-2021 View history Request changes
Pressure System Assembly	The assembled elements of a pressure system. This includes all plant/systems that contain a 'relevant fluid', defined as steam or gas under pressure and liquids under pressure which become gases upon release to the atmosphere, at a pressure greater than 0.5 bar (about 7psi) above atmospheric (except for steam).	MD	Ss_55_20_60_15	10-03-2023 View history Request changes
Pump Assembly	The assembled elements of a device that raises, transports or compresses fluids by mechanical action. Only includes pumps fixed in a particular location. Mobile pumps which are transported to be used at various locations are not included in this definition.	MP	Pr_65_53	10-03-2023 View history Request changes
Sand Bagging Equipment	Equipment used to fill sand bags for use in Incident Response. Assets that are fixed in a permanent location only (this does not include mobile equipment or hand held / manual equipment).	MK	Pr_40_70_66_75	10-03-2023 View history Request changes
Solar Farm	A group of photovoltaic solar panels that supply electricity to the national grid; it does not directly supply electricity to an asset.	MS	Ss_70_10_70_35	17-05-2021 View history Request changes
Wind Power Generator	A stand alone power generator system for collecting the wind's kinetic energy that is not an element of another asset that is there to supply the asset with power.	MV	Ss_70_10_70_98	10-03-2023 View history Request changes

Asset Type	Description	Asset Code	Uniclass 2015	Updates
PSRA Tree Site	A 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.	KT	Co_32_65_96	05-09-2022 View history Request changes
Public Safety Control System	A 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.	KP	Co_75	17-05-2021 View history Request changes

Asset Type	Description	Asset Code	Uniclass 2015	Updates
Animal Trap	A device designed to trap animals without injuring them, for example so they can be tagged or checked.	TK	Pr_40_30_22_38	31-08-2021 View history Request changes
Borehole	A 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.	SA	Ss_15_95_15_10	02-12-2022 View history Request changes
Cableway	A system used for transporting items from point A to B via a cable suspended between two towers or structures.	TA	SL_80_20_13	17-05-2021 View history Request changes
Central Pier	A significant central supporting structure built in a channel which both: 1. provides an intermediate support to a structure spanning the channel AND 2. provides a platform or building for accommodating equipment, machinery and/or operating personnel. If the second criteria is not met, then the supporting structure should be classified as a Central Support Structure element of the spanning structure, e.g. control gate.	TF	Ss_20_50_20	10-03-2023 View history Request changes
Control Gate	An adjustable gated structure used to control water levels and flow in watercourses, for water flow management, flood control and navigation. Includes all types of gate, e.g. sluice gates, mitre gates, sector gates, radial gates, vertical lift gates and penstocks. Also includes gates in tidal barriers. Does not include control structures that are adjusted by removable stoplogs. These are covered by In-Channel Stoplogs. Often multiple gates are used in parallel, but each gate should be considered a separate control gate asset and grouped together in a Control Structure complex. Only covers gates in channels to control channel flow. Gates outside the channel which form part of a line of flood defences are Flood Gates.	SG	En_32_85_15	10-03-2023 View history Request changes
Debris Boom	A floating barrier across a watercourse designed to catch debris which could interfere with the operation of an asset.	SB	Pr_40_70_27_22	17-05-2021 View history Request changes
Debris Screen	A screen that reduces the amount of trash and debris entering culverts, outfalls or channels (where it could cause a blockage).	SR	En_32_85_23	02-12-2022 View history Request changes
Draw Off Tower	A vertical tubular structure with one or more openings used for removing water from reservoirs and diverting it elsewhere.	SD	En_32_85_25	17-05-2021 View history Request changes
Fish Pass	A structure that enables fish, eels or lampreys to bypass an obstacle in a channel such as a lock, weir or control gate.	SF	Ss_45_75_30	02-12-2022 View history Request changes
Fish Refuge	A floating wire mesh refuge providing cover for smaller fish.	TE	Pr_45_28_30_30	17-05-2021 View history Request changes
Fish or Eel Barrier	A barrier that prevents the movement of aquatic life into areas that may jeopardise their survival. It could be a physical barrier, ultrasound or electrical system.	TB	Ss_45_75_25_05	10-03-2023 View history Request changes
Fishing Cage	A system that confines fish or shellfish in a mesh enclosure. Must be fixed in location.	TC	En_32_10_29	17-05-2021 View history Request changes
Fishing Platform	A 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.	TP	En_32_50_96	17-05-2021 View history Request changes
In Channel Stoplogs	An adjustable structure used to control water levels and flow in watercourses, for water flow management, flood control, and navigation. This asset is only to be used when the adjustable structure is a standalone asset. If there are stoplogs as part of an asset, in order that maintenance can be completed, they are a Stoplogs and Lasherboard element of the asset they are part of. Does not include gated structures, only structures which are adjusted by the addition or removal of stoplogs. Multiple sets of stoplogs may be used in parallel, but each set of stoplogs should be considered a separate asset and grouped together in a Control Structure Complex. Only covers stoplogs in channels to control in-channel flow. Stoplogs outside the channel which form part of a line of flood defences are demountable defences.	SC	Ss_55_70_99_84	10-03-2023 View history Request changes
Inspection Chamber	An opening to a confined space such as a culverted watercourse or underground services, providing access for testing, inspecting, maintaining and clearing blockages.	SN	Pr_65_52_01	05-09-2022 View history Request changes
Jetty	A 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).	SJ	En_32_50_44	17-05-2021 View history Request changes
Mine Adit	A horizontal or near-horizontal entrance to an underground mine.	TM	Ss_37_50_92_15	02-12-2022 View history Request changes
Mine Shaft	A vertical or near-vertical entrance to an underground mine.	TN	SL_30_10_93	02-12-2022 View history Request changes
Outfall	The structure at the point where surface water drains discharge into a watercourse or the sea. Outfalls may have a flap valve or gate fitted to prevent reversal of flow during flood flows. If the flap is simple non-return valve that opens and closes under the force of the flow, then this is an element of the outfall. If there is a control gate such as a penstock which can be adjusted or controlled, this should be classified as a separate control gate asset. Where smaller watercourses discharge into larger watercourses through culverted sections, these should be recorded as culverts with or without a control gate asset as applicable.	SU	En_32_85_59	10-03-2023 View history Request changes
Pier	A 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).	SO	En_32_50_63	05-09-2022 View history Request changes
Ramp	A sloped access route between two different levels.	TR	EF_35_20_30	17-05-2021 View history Request changes
Sand Trap	A structure for aerating groundwater. Also used to trap sand and soil particles.	SX	En_32_85_75	17-05-2021 View history Request changes
Security Screen	A screen which prevents unauthorised access to culverts, outfalls and channels.	SY	Pr_25_96_35_37	17-05-2021 View history Request changes
Slipway	A slope or ramp leading down into water (channel or sea) used for launching/landing boats.	TS	SL_32_50_79	02-12-2022 View history Request changes
Soil Moisture Tube	An underground device for monitoring the moisture content of the soil	SV	Pr_80_51_51_80	05-09-2022 View history Request changes
Steps	A series of treads and risers as an access route between two different levels (not a ladder).	TT	Ss_35_10_25	02-12-2022 View history Request changes
Stilling Basin	A depressed area in a channel or reservoir that is deep enough to reduce the velocity of the water before it passes further downstream.	ST	En_32_85_84	17-05-2021 View history Request changes
Stilling Well	A 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.	SI	SL_32_85_84	14-06-2021 View history Request changes
Surface Water Tank	A buried tank for collecting and storing surface water for further use or attenuation.	SK	Ss_50_70_85_06	17-05-2021 View history Request changes
Vortex Flow Control	A flow control structure which uses a vortex flow control device to control the flow.	SH	SL_32_85_94	05-09-2022 View history Request changes
Water Baffles	An obstruction placed in the flow of water in order to redirect all or partial flow and create a variation in flow velocities. Each Baffle is to be recorded as a separate element.	TL	Ss_55_70_99_96	10-03-2023 View history Request changes
Water Distribution Pipeline	The pipe work attached to a pumping station that delivers water to a water body. A pipeline may be attached to multiple pumping stations.	TD	En_55_15_72	17-05-2021 View history Request changes
Weir	A low barrier that is built across the width of a watercourse to control the flow or upstream water level. There are many reasons this may be required such as flow gauging, offtakes, amenity or navigation. A weir is fixed in one position, if it is adjustable (for example in height), it should be classified as a Control Gate or In Channel Stoplogs.	SW	En_32_85_97	10-03-2023 View history Request changes
Well	A shaft sunk into the ground for collecting groundwater. Wider diameter and usually hand dug.	TW	En_32_85_98	10-03-2023 View history Request changes

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