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.
- Aids to Navigation
- Amenities
- Asset Complex
- Beach Structure
- Buildings and Compounds
- Channel
- Channel Crossings
- Defence
- Information Deliverables
- Instruments
- Land
- MEICA
- Public Safety
- Structure
Aids to Navigation
Assets that are used to aid navigation in the marine and fluvial environment.
Created on 27-04-2021 | View history
| Asset Type | Description | Asset Code | Uniclass 2015 | Last Updated |
|---|---|---|---|---|
| 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. | AB | Pr_40_10_90_07 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Boatroller | A bankside structure which incorporates rollers to allow small unpowered craft, such as canoes, to bypass a lock. | AR | SL_32_50_72 | Updated on 17-05-2021 | View history |
| 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. | AU | Pr_40_10_90_10 | Updated on 17-05-2021 | View history |
| Canoe Pass | A channel of water designed to allow the bypass of locks by canoes and kayaks. | AC | SL_32_50_11 | Updated on 17-05-2021 | View history |
| Canoe Portage Point | A prepared area designed to allow the ingress and egress of small boats, kayaks and canoes. | AP | SL_32_50_12 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Dolphin | A man-made marine structure that extends above the water level and is not connected to shore. | AD | En_32_85_24 | Updated on 17-05-2021 | View history |
| Landing | A place for boats to wait or be temporarily parked before entering a lock. | AL | En_32_50_46 | Updated on 17-05-2021 | View history |
| 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. | AK | SL_80_70_11 | Updated on 17-05-2021 | View history |
| Lock Island | The area of land between a lock and its associated water level control structure such as a weir or control gate. | AI | SL_80_70_48 | Updated on 17-05-2021 | View history |
| Mooring | A place where a boat or vessel can be secured to stop it floating away. | AM | SL_32_50_53 | Updated on 17-05-2021 | View history |
| Navigation Boom | A floating barrier strung across a navigable stretch of water to control or block navigation. | AN | Pr_40_10_90_55 | Updated on 17-05-2021 | View history |
| Navigation Signage | Signage in the marine and fluvial environment which provides information or warnings to aid navigation. | AG | Pr_40_10_90 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Warning Flag | A flag used to warn boats or vessels about danger. | AW | Ss_40_10_30_93 | Updated 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 Type | Description | Asset Code | Uniclass 2015 | Last Updated |
|---|---|---|---|---|
| Car Park or Hardstanding | An area of prepared ground with either hardcore or tarmac used for parking vehicles. | YC | En_80_45_85 | Updated on 17-05-2021 | View history |
| Information Board | A structure which is designed to convey information to people (typically visitors). | YI | Pr_40_30_25 | Updated on 17-05-2021 | View history |
| 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 | Updated 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 Type | Description | Asset Code | Uniclass 2015 | Last Updated |
|---|---|---|---|---|
| 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 | Updated on 17-05-2021 | View history |
| Complex Beach Structure | A collection of beach assets which work together to protect the coast from erosion. | IB | Co_32_55_20 | Updated on 17-05-2021 | View history |
| Complex Defence | A collection of assets which work together to provide flood defence or coastal protection functions. | ID | Co_32_55_30 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Erosion Protection | A group of assets which work together to reduce erosion a particular feature or area. | IE | Co_32_55_27 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Flood Alleviation Scheme | A group of assets which work together to alleviate flooding to a defined area from a defined source. | IQ | Co_32 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Lock Complex | A group of associated assets which form a complex of locks, for example a series of locks. | IL | Co_32_85_50 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Recreational Complex | A group of assets providing a recreational facility in a certain location. | IA | Co_40 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| 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 includes 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 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Water Transfer Scheme | A group of associated assets which transfer water from one catchment or waterbody to another. | IW | Co_55_70_20 | Updated on 17-05-2021 | View history |
Beach Structure
Assets used to protect the coast from erosion.
Updated on 27-04-2021 | View history
| Asset Type | Description | Asset Code | Uniclass 2015 | Last Updated |
|---|---|---|---|---|
| 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 | Updated on 17-05-2021 | View history |
| 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 | Updated 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 Type | Description | Asset Code | Uniclass 2015 | Last Updated |
|---|---|---|---|---|
| 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. | VY | En_40_05_68 | Updated on 17-05-2021 | View history |
| Boathouse | A building designed and/or used for the storage and/or maintenance of boats. | VB | En_30_85_07 | Updated on 17-05-2021 | View history |
| Control Building | A building designed and/or used to house the controls for operational assets. | VC | En_75_70_60 | Updated on 17-05-2021 | View history |
| Garage | A building designed and/or used for the storage and/or maintenance of vehicles. | VA | SL_90_50_33 | Updated on 17-05-2021 | View history |
| Gauging Station Building | A building designed and/or used for the housing of apparatus, equipment and fixtures for measuring river levels and flow. | VG | En_90_90_35 | Updated on 17-05-2021 | View history |
| Lab Building | A building designed and/or used for laboratory activities. | VL | En_25_30_40 | Updated on 17-05-2021 | View history |
| Maintenance Building | A building designed for the maintenance of equipment and assets or elements. | VM | En_30_60_50 | Updated on 17-05-2021 | View history |
| Monitoring Building | A building designed and/or used for the housing of apparatus, equipment and fixtures for the purpose of monitoring the environment. | VN | En_90_90_27 | Updated on 17-05-2021 | View history |
| Office Building | A building containing offices where work is done. | VF | Co_20_15_58 | Updated on 17-05-2021 | View history |
| Pump House | A building designed and used to house pumps and the controls and facilities which support their operation. | VP | En_90_90_68 | Updated on 17-05-2021 | View history |
| Residential Building | A building designed and/or used primarily for people to dwell in. | VR | En_45_10 | Updated on 17-05-2021 | View history |
| Shelter | A place giving temporary protection from the elements. | VS | Ss_20_10_70 | Updated on 17-05-2021 | View history |
| Storage Location | The location where equipment, such as temporary barriers or mobile instrumentation, is stored. | VE | Co_90_50_77 | Updated on 17-05-2021 | View history |
| Visitor Centre | A building designed and/or used as a centre for providing information and facilities to members of the public. | VV | En_40_75_94 | Updated on 17-05-2021 | View history |
| Watermill | A building designed and/or used for the housing of machinery for converting potential energy of water into useful power. | VT | En_30_80_96 | Updated on 17-05-2021 | View history |
Channel
Assets that convey water.
Updated on 27-04-2021 | View history
| Asset Type | Description | Asset Code | Uniclass 2015 | Last Updated |
|---|---|---|---|---|
| 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. | CC | En_32_95_16 | Updated on 17-05-2021 | View history |
| Open Channel | A conduit in which water flows with a free surface, i.e. not culverted. | CP | En_32_95_59 | Updated on 17-05-2021 | View history |
| 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. | CS | En_32_95_80 | Updated on 17-05-2021 | View history |
Channel Crossings
Assets that allow access across a channel.
Created on 27-04-2021 | View history
| Asset Type | Description | Asset Code | Uniclass 2015 | Last Updated |
|---|---|---|---|---|
| Bridge | A structure that spans a watercourse and allows the passage of road, rail, pedestrian and farm access. It also includes aqueducts. | RB | En_80_94 | Updated on 17-05-2021 | View history |
| Ford | A shallow part of a watercourse that may be crossed on foot or by a vehicle in low flows. | RF | SL_32_50_30 | Updated on 17-05-2021 | View history |
| Utility Services Crossing | A structure that spans a watercourse and allows a utility service to cross the watercourse. | RU | Ss_20_10_30_65 | Updated 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 Type | Description | Asset Code | Uniclass 2015 | Last Updated |
|---|---|---|---|---|
| Barrier Beach | A sand or shingle bar above high tide, parallel to the coastline and usually separated from it by a lagoon. | DA | En_32_85_06 | Updated on 17-05-2021 | View history |
| Beach | A pebbly or sandy shore found at the coast. | DB | En_32_65_06 | Updated on 17-05-2021 | View history |
| 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. | DG | Ss_20_50_10 | Updated on 17-05-2021 | View history |
| Cliff | A steep rock face, especially one that runs along the coast. | DC | Co_32_65_15 | Updated on 17-05-2021 | View history |
| Demountable Defence | Sections of flood defence that are removable (e.g. for visual amenity or access reasons). | DM | Ss_25_95_30 | Updated on 17-05-2021 | View history |
| Dunes | Wind-blown sand mounds found along the coast. | DD | En_32_65_75 | Updated on 17-05-2021 | View history |
| Embankment | An artificially raised, earthen ridge used in the fluvial, tidal and coastal environments for flood defence, erosion protection, or channel containment. | DE | En_32_85_45 | Updated on 17-05-2021 | View history |
| 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. | DR | En_32_40_37 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Promenade | A paved public walking area along the coast. | DP | En_80_40_66 | Updated on 17-05-2021 | View history |
| Quay | A structure adjacent to or protruding into watercourse or the sea to load or unload boats. | DQ | En_32_50_69 | Updated on 17-05-2021 | View history |
| Spillway | A structure designed to allow the controlled overflow or release of water from a reservoir or flood storage area, or over flood defences. | DS | En_32_85_82 | Updated on 17-05-2021 | View history |
| Wall | A wall which is raised above the surrounding land and acts as a barrier against flooding from rivers or the sea. | DW | En_32_85_96 | Updated 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 Type | Description | Asset Code | Uniclass 2015 | Last Updated |
|---|---|---|---|---|
| *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 | Created on 27-04-2021 | View history |
| *Information Purposes | The purposes that the information will or may be used to support. | n/a | n/a | Updated on 14-06-2021 | View history |
| Asset Management | Information required relating to asset management. | J0000 | PM_80 | Created on 27-04-2021 | View history |
| Commercial Financial Products | Any commercial financial products generated in the delivery of the project. | F0000 | PM_50 | Created on 27-04-2021 | View history |
| Commissioning and Performance Evaluation (GSL) | Information required relating to commissioning and performance evaluation including Government Soft Landings (GSL). | M0000 | PM_35 | Created on 27-04-2021 | View history |
| Communications and Engagement | Information relating to communications, engagement and consultation. | N0000 | PM_80_20 | Updated on 14-06-2021 | View history |
| Design | All supporting and analytical information relating to the design for the project outcome including calculations and justifications. | B0000 | PM_40_30 | Created on 27-04-2021 | View history |
| Economic Viability | Information required relating to economic viability. | H0000 | PM_50_30 | Created on 27-04-2021 | View history |
| 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 | Created on 27-04-2021 | View history |
| Health and Safety | All Health and Safety documentation relating to the project. | K0000 | PM_35_50 | Created on 27-04-2021 | View history |
| Modelling | Information required relating to hydraulic and fluvial modelling. | L0000 | PM_40_35 | Created on 27-04-2021 | View history |
| Permissions, ownership and responsibility | Records of any approvals granted. | I0000 | PM_40_50 | Created on 27-04-2021 | View history |
| Planning | Information required relating to planning. | R0000 | PM_80_10 | Created on 27-04-2021 | View history |
| Procurement Products | Information required relating to supplier procurement, tender and appointment. | G0000 | PM_50_50 | Created on 27-04-2021 | View history |
| Project Management | Any project management related information generated in the delivery of the project. | E0000 | PM_10_10 | Created on 27-04-2021 | View history |
| Site and Asset Conditions | Physical information about the project area (discovery). | A0000 | PM_60_10 | Created on 27-04-2021 | View history |
| Site-based works | All information relating to the works carried out on site, including construction. | D0000 | PM_60_10 | Created on 27-04-2021 | View history |
Instruments
Assets used to measure water level and flow.
Created on 27-04-2021 | View history
| Asset Type | Description | Asset Code | Uniclass 2015 | Last Updated |
|---|---|---|---|---|
| CCTV Camera System | A CCTV (Closed Circuit Television) camera or group of connected CCTV cameras at a site and the associated onsite equipment. | NC | Ss_75_40_53_86 | Updated on 17-05-2021 | View history |
| Flood Warning System | A device or mechanism situated in a flood risk area that warns people in the area of imminent flooding. | NF | Ss_75_60_55_30 | Updated on 17-05-2021 | View history |
| Gauge Board | A board with numeral markings, used to measure and indicate the depth or level of water in a water body. | NG | Pr_80_51_70_96 | Updated on 17-05-2021 | View history |
| Instrumentation | A device installed in a particular location to measure physical quantities. | NI | Pr_80_51 | Updated on 17-05-2021 | View history |
| Piezometer | An instrument for measuring pressure or depth in groundwater. | NP | Pr_80_51_51_62 | Updated on 17-05-2021 | View history |
| Rain Gauge | An instrument for collecting and measuring the amount of precipitation falling in a particular location. | NR | Pr_75_50_52 | Updated on 17-05-2021 | View history |
| Sample or Survey Point | A known point in the physical world from where correct orientation or a sample can be taken. | NS | Zz_35_80 | Updated on 17-05-2021 | View history |
| Telemetry System | A telemetry system communicates data from an asset to a receiving system. | NT | Ss_75_70_54_03 | Updated on 17-05-2021 | View history |
Land
Areas of land that are involved in water management.
Updated on 27-04-2021 | View history
| Asset Type | Description | Asset Code | Uniclass 2015 | Last Updated |
|---|---|---|---|---|
| Mudflats | Coastal wetlands that form in intertidal areas where sediments have been deposited by tides or rivers. | LM | En_32_65_55 | Updated on 17-05-2021 | View history |
| Salt Marsh | Mudflats that have built up to a higher elevation so that vegetation is able to colonise. | LS | Co_32_65_75 | Updated on 17-05-2021 | View history |
| Water Storage Area | An area of land that is deliberately engineered to hold water where it wouldn't naturally accumulate. | LW | Co_55_15_96 | Updated on 17-05-2021 | View history |
MEICA
Mechanical, electrical, instrumentation, control and automation assets.
Created on 27-04-2021 | View history
| Asset Type | Description | Asset Code | Uniclass 2015 | Last Updated |
|---|---|---|---|---|
| Automation Controls | Equipment used as an automated method of controlling a structure such as a pumping station. | MT | Ss_75_70 | Updated on 17-05-2021 | View history |
| Engine Assembly | The assembled elements of a machine which burns or consumes fuel to perform mechanical work. | ME | Ss_85_50_65_40 | Updated on 14-06-2021 | View history |
| Generator | A device that converts movement (mechanical energy) into electrical power for use in an external circuit. | MJ | Pr_60_70_65_34 | Updated on 17-05-2021 | View history |
| High Voltage Electrical Equipment | Electrical equipment with a high voltage, usually 1000V or more. | MH | Ss_70_30_35 | Updated on 17-05-2021 | View history |
| Hydraulic System Assembly | The assembled elements of a system that uses pressurised hydraulic fluid to power hydraulic machinery. | MY | Ss_85_50_65_38 | Updated on 17-05-2021 | View history |
| Motor Control Centre Controls | Control panels that operate motorised equipment such as pumps or gates. | MC | Pr_75_50_18_53 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Pressure System Assembly | The assembled elements of a pressure system, which includes all plant/systems that contain a 'relevant fluid' under pressure. | MD | Ss_55_20_60_15 | Updated on 17-05-2021 | View history |
| Pump Assembly | The assembled elements of a device that raises, transports or compresses fluids by mechanical action. | MP | Pr_65_53 | Updated on 17-05-2021 | View history |
| Sand Bagging Equipment | Equipment used to fill sand bags for use in Incident Response. | MK | Pr_40_70_66_75 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Wind Power Generator | A stand alone power generator system for collecting the wind's kinetic energy. | MV | Ss_70_10_70_98 | Updated 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 Type | Description | Asset Code | Uniclass 2015 | Last Updated |
|---|---|---|---|---|
| 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 | Updated on 17-05-2021 | View history |
| 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 | Updated 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 Type | Description | Asset Code | Uniclass 2015 | Last Updated |
|---|---|---|---|---|
| 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 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Central Pier | A significant central supporting structure built in a channel. | TF | Ss_20_50_20 | Updated on 17-05-2021 | View history |
| Control Gate | An adjustable gated structure used to control water levels and flow in watercourses, for water flow management, flood control and navigation. | SG | En_32_85_15 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Eel Pass | A structure that enables eels to bypass an obstacle in a channel such as a lock, weir or control gate. | SE | Ss_45_75_27 | Updated on 17-05-2021 | View history |
| Fish Pass | A structure that enables fish to bypass an obstacle in a channel such as a lock, weir or control gate. | SF | Ss_45_75_30 | Updated on 17-05-2021 | View history |
| Fish Refuge | A floating wire mesh refuge providing cover for smaller fish. | TE | Pr_45_28_30_30 | Updated on 17-05-2021 | View history |
| Fish or Eel Barrier | A barrier that prevents the movement of aquatic life into areas that may jeopardise their survival. | TB | Ss_45_75_25_05 | Updated on 17-05-2021 | View history |
| Fishing Cage | A system that confines fish or shellfish in a mesh enclosure. Must be fixed in location. | TC | En_32_10_29 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| In Channel Stoplogs | An adjustable structure used to control water levels and flow in watercourses, for water flow management, flood control, and navigation. | SC | Ss_55_70_99_84 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Lamprey Pass | A structure that enables lampreys to bypass an obstacle in a channel such as a lock, weir or control gate. | SL | Ss_45_75_44 | Updated on 17-05-2021 | View history |
| Outfall | The structure at the point where surface water drains discharge into a watercourse or the sea. | SU | En_32_85_59 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Ramp | A sloped access route between two different levels. | TR | EF_35_20_30 | Updated on 17-05-2021 | View history |
| Sand Trap | A structure for aerating groundwater. Also used to trap sand and soil particles. | SX | En_32_85_75 | Updated on 17-05-2021 | View history |
| Security Screen | A screen which prevents unauthorised access to culverts, outfalls and channels. | SY | Pr_25_96_35_37 | Updated on 17-05-2021 | View history |
| Slipway | A slope or ramp leading down into water (channel or sea) used for launching/landing boats. | TS | SL_32_50_79 | Updated on 17-05-2021 | View history |
| Steps | A series of treads and risers as an access route between two different levels (not a ladder). | TT | Ss_35_10_25 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| 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 | Updated on 14-06-2021 | View history |
| Surface Water Tank | A buried tank for collecting and storing surface water for further use or attenuation. | SK | Ss_50_70_85_06 | Updated on 17-05-2021 | View history |
| Vortex Flow Control | A flow control structure which uses a vortex flow control device to control the flow. | SH | SL_32_85_94 | Updated on 17-05-2021 | View history |
| 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. | TL | Ss_55_70_99_96 | Updated on 17-05-2021 | View history |
| 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 | Updated on 17-05-2021 | View history |
| Weir | A low barrier that is built across the width of a watercourse to control the flow or upstream water level. | SW | En_32_85_97 | Updated on 17-05-2021 | View history |
| Well | A shaft sunk into the ground for collecting groundwater. | TW | En_32_85_98 | Updated on 17-05-2021 | View history |