Creating GAD Objects

To create GAD objects, Editor or Manager level access is required for the GAD module for the specific Area that the objects are associated to (see Access Levels).
See here for how to check your current access level. See here for how to apply for a change in access level.

Before creating a GAD object, please confirm that it does not already exist. This should be double-checked by looking for similar objects on the Map view, and in the summary grids for the particular object type.

Creating a Geotechnical Asset

To create a Geotechnical Asset, go to Main Menu > Geotechnical > Create Asset.

You will first be asked to define the Asset type, the location of the start and end points, and the slope geometry at the start and end points. Refer to the linked pages for specific guidance on how to do this.

A form for entering details about the asset will appear. Click herehere for guidance on what should be entered for specific fields.

Guidance for data to be entered during creation of a Geotechnical Asset
Field	Data to be entered	When Mandatory?
Asset Type	Geotechnical asset type, as defined within the ADMM. 'At Grade' should be selected for all assets whose maximum vertical height within the longitudinal extent of the asset is less than 2.5m. The 'front' side of a bund is that facing the carriageway.	Creation
Off-Network?	Select when an asset is within the responsibility of National Highways, but is off the network and not associated with a carraigeway. This will affect how the location of the asset is defined.
Area	NH Area number. Automatically taken from Network for Network Assets. Editable for Off-Network assets only. Only Areas to which you have Editor or Manager access level for the GAD module can be selected.	Creation
Description	General description field Note: This field will be editable even when the earthwork is approved.
Review Required?	Notes whether the asset needs reviewing following migration.
Location Description	Descriptive location of the asset.
Side	Side of the carriageway where the asset is located. Either Left or Right, facing with the direction of traffic (i.e. for a dual-carriageway, select right for assets in the central reservation).
Geology observed?	Is the 'Geology Description' based upon direct observations in the field?
Geology from BGS map?	Is the 'Geology Description' based upon a BGS geological map?
Geology from new investigation?	Is the 'Geology Description' based upon a recent or ongoing ground investigation?
Geology from existing investigation?	Is the 'Geology Description' based upon a historic ground investigation identified during the desk study?
Geology description	A description of the geology of the asset.
In-situ geology	For cuttings and at grade earthworks, select the assessed in situ geology code in which the cutting lies For embankments and bunds, select the geology code assessed to be underneath the fill material.	Approval
Embankment geology	For embankments and bunds only. Select the assessed embankment geology code for the embankment composition.	Approval (for relevant asset types)
Inspection return period (years)	The maximum number of years between Principal Inspections for this asset as a whole (i.e. including all associated objects). This should be determined based upon a risk assessment in accordance with CS641. Where insufficient information is available to undertake an assessment a default of 5 years should be set (as per NA to CS641). Note: This does not include any more frequent monitoring requirements for an object.
Inspection return period assessed?	Record whether an asset specific risk assessment was undertaken to determine the Principal Inspection return period?
Date of construction	Date when construction of the asset was completed. If the year is known, but the month and/or day is not, the full date should be entered assuming the first day or month for the missing information (e.g. 1st January 1972). TIP: If a precise date is unknown, you will need to estimate based on the available information (for example the date of construction of the associated road) and record a low quality, before the asset can be approved.	Approval
Construction date source	Field appears once a construction date is entered. Select the source from the list.	Approval
Quality of construction date source	Field appears once a construction date is entered. Select the assessed quality of the data source.	Approval
Date of decommission	Date when the asset was decommissioned. If the year is known, but the month and/or day is not, the full date should be entered assuming the first day or month for the missing information (e.g. 1st January 1972).
Decommission date source	Field appears once a decommission date is entered. Select the source from the list.
Quality of decommission date source	Field appears once a decommission date is entered. Select the assessed quality of the data source.
Reason for decommissioning	Field appears once a decommission date is entered. Select the reason.

All the details should be entered if possible. The Asset type is mandatory for the asset to be created. Area is taken from the network but user entered for off network assets and mandatory for creation.

On the next page, you must link an Activity to the Asset on creation. This should be the Activity which triggered the creation of the Asset, for example the inspection where it was identified. It can be an existing activity, or a newly created one.

When finished, click Save, and you will be taken to the details page for your newly created Asset!

You should now liaise with a GAD Manager to Approve the new asset.

From here you can create the other GAD objects within the Asset (see here for data structure).

Creating GAD Items

Every Inventory Item must be associated with a Geotechnical Asset. Condition Items can be associated with either a Geotechnical Asset or Inventory Item.

To create an Item, first navigate to the details page for the Asset (or Inventory Item).

Navigate to the appropriate section, and click either Create Inventory Item, or Create Condition Item on the command bar.

First you will be asked to define the location and extents of the item along the asset, and have the option to define a new Intermediate Slope Geometry If creating a condition item on an inventory item, you will be asked to define the extent along the inventory item.

A form for entering details about the item will then appear, split over two pages for general details, and details specific to the Item type.

Click herehere for guidance on what should be entered for specific fields for Inventory Items.

Guidance for data to be entered for all Inventory Items
Field	Guidance
Type	Select type of Inventory Item from list. Mandatory.
Description	General description of Inventory Item. Free -text field.
Revew Required	Notes whether the inventory item needs reviewing following migration.
Date of Construction	Date when construction of the item was completed. If the year is known, but the month and/or day is not, the full date should be entered assuming the first day or month for the missing information (e.g. 1st January 1972). TIP: If a precise date is unknown, it is better to estimate based on the available information and record a low quality, rather than leave blank.
Construction date source	Select the source from the list. Leave blank for natural features (e.g. geology and vegetation) as this field is not relevant. Mandatory if a construction date is entered.
Quality of construction date source	Select the assessed quality of the data source. Mandatory if a construction date is entered.
Date of decommission	Date when the Inventory Item was decommissioned. Not relevant for natural features (e.g. geology and vegatation). Leave blank. If the year is known, but the month and/or day is not, the full date should be entered assuming the first day or month for the missing information (e.g. 1st January 1972).
Decommission date source	Select the source from the list. Mandatory if a decommission date is entered.
Quality of decommission date source	Select the assessed quality of the data source. Mandatory if a decommission date is entered.
Reason for decommissioning	Select the reason. Mandatory if a decommission date is entered.

Guidance for data to be entered for Access Contraint Inventory Items
Field	Guidance
Access constraint reason	Select the type of access constraint from the list. Mandatory.
Access constraint other reason	Describe access constraint. Mandatory if 'Other' access constraint selected.

Drainage of an earthwork slope is often better defined as an SGM Inventory Item. Drainage should preferentially be recorded as an SGM where possible, as this records the nature and function more thoroughly.
Before creating a new Drainage Inventory Item, check that the feature is not already on the system as an SGM Inventory Item to avoid duplication.

Guidance for data to be entered for Drainage Inventory Items
Field	Guidance
Drainage position	Select the location of the drainage. Mandatory. 'Mid slope' should be selected for transverse drainage running down the slope.
Drainage type	Select the type of drainage which is present.
Uniclass 2015 Code	Automatically populated where appropriate. Classification code for item in accordance with Uniclass 2015 system.
ADMM Code	Automatically populated where appropriate. Classification code for the item in accordance with the ADMM.

Guidance for data to be entered for Geology Material Inventory Item
Field	Guidance
Source of information	Select the source of information about the geology. Mandatory.
In situ geology	Select the geology type from the pre-defined list.
Embankment geology	Select the geology type from the pre-defined list.
SHW fill class	Select the class of fill material from the pre-defined list. Refer to the Specification for Highway Works (SHW), Volume 1, Series 600 for detailed definitions of the classes.

Guidance for data to be entered for SGM Inventory Item
Field	Guidance
SGM type	Select the SGM type from the pre-defined list. Mandatory.
Vertical extent (%)	Height of the SGM as a proportion of the total earthwork height. Select from the pre-defined list. Mandatory
Temporary Repair?	Is the SGM a temporary repair.
Uniclass 2015 code	Automatically populated where appropriate. Classification code for item in accordance with Uniclass 2015 system.
ADMM	Automatically populated where appropriate. Classification code for the item in accordance with the ADMM.

Guidance for data to be entered for Vegetation Inventory Item
Field	Guidance
Bare ground	Extent of bare ground. Mandatory.
Grass	Extent of grass. Mandatory.
Brambles	Extent of brambles. Mandatory.
Shrubs	Extent of Shrubs. Mandatory.
Trees	Extent of brambles. Mandatory
Shrub Height	Average height, in metres, of shrubs. Mandatory if presence of shrubs recorded.
Tree Height	Average height, in metres, of trees. Mandatory if presence of trees recorded.

Click herehere for guidance on what should be entered for specific fields for Condition Items.

Guidance for data to be entered for all Condition Items
Field	Guidance
Type	Select type of Condition Item from list. Mandatory.
Description	General description of Condition Item. Free-text field.
Revew Required	Notes whether the Condition Item needs reviewing following migration.
Min distance to ....	Minimum distance, in metres, from any point of the item to a variety of features.
Description of 'other'	Description of the other feature to which a minimum distance is defined. Free-text field.

Guidance for data to be entered for Condition Items attributes. A selection of attributes will be requested dependant on the Condition Item Type selected.
Field	Guidance
Volume of failed material (m3)	Estimate of the total volume of material which has failed or become displaced.
Length (m)	Estimated length of the Condition Item, measured along the asset.
Breadth (m)	Estimated breadth of the Condition Item, measured perpendicular to the asset.
Depth (m)	Estimated depth of the Condition Item, measured with reference to the nominal or original surface level.
Density (No. per m2)	Average number of instances of the defect per square metre.
Horizontal misalignment (m)	Maximum horizontal displacement of the barrier from its original position, either along or perpendicular to the asset direction.
Vertical misalignment (m)	Maximum vertical displacement of the barrier from its original position.
Angular distortion (deg)	Maximum rotation of the object from it's original position. If uncertain, it should be presumed the object was originally vertical.
Flow rate (litres/min)	Estimated total flow rate of leachate or seepage emerging from the asset.

You must link an Activity to the Item on creation. This should be the Activity which triggered the creation of the item, for example the inspection where it was identified. It can be an existing activity, or a newly created one. More Activities can be subsequently associated if needed.

When finished, click Save, and you will be taken to the details page for your newly created Item!

You should now liaise with a GAD Manager to Approve the new Item.

Creating GAD Sets

Every Inventory Set and Condition Set must be associated with a Geotechnical Asset. They are constituted as a collection of Inventory or Condition Items.

To create a Set, first navigate to the details page for the Asset.

Navigate to the appropriate section, and click either Create Inventory Set, or Create Condition Set on the command bar.

First you will be asked to define an optional free-text description of the set. This should be a short description characterising the set, providing any additional useful detail not captured by the constituent items.

You will also be asked to fill in whether a review is required.

On the next page you 'Pick' the GAD Items you would like to include within the Set. To do this select desired Items from the grid in the right-hand 'All Items' panel, and click Add Item(s) on the command bar.

An item can only be in one Set. If added to a new set, an item will be removed from its current set if it is in one.

To remove Items, select them from the grid in the left-hand 'Picked Items' panel, and click Remove Item(s) on the command bar.

You must link an Activity to the Set on creation. This should be the Activity which triggered the creation of the Set, for example the inspection where it was identified. It can be an existing activity, or a newly created one. More Activities can be subsequently associated if needed.

When finished, click Save, and you will be taken to the details page for your newly created Set!

You should now liaise with a GAD Manager to Approve the new Set.

Creating Slope Geometries

You will be required to define the Slope Geometry at the Start and End locations when creating a new Geotechnical Asset.

You can create additional Intermediate Slope Geometries from the details page of the Geotechnical Asset. As an example, Intermediate Slope Geometries should be created at the locations of classified Condition Sets.

To create a Slope Geometry, first navigate to the details page for the Asset, select Slope Geometries from the Section Menu and click Create Slope Geometry.

You will first be asked to define the location of the Slope Geometry along the Asset.

A form for entering details about the Slope Geometry will then appear.

Click herehere for guidance on what should be entered for specific fields.

Field	Guidance
Chainage	Automatically calculated based upon the snapped location along the asset.
Description	Free-text field for general description.
Review Required	Notes whether the Slope Geometry needs reviewing following migration.
Slope Angle (°)	The acute angle the slope surface forms with the horizontal. Recorded to the nearest degree.
Slope Length (m)	The distance from the crest to the toe of the asset, measured directly down the slope and along it's surface. To be recorded in metres to the nearest 0.1m.
Slope Bearing (°)	The plan orientation of the asset in the direction of increasing chainage (i.e. towards the 'end' point as defined on the system). Recorded to the nearest degree as a bearing i.e. with reference to North.
Slope Height (m)	Automatically calculated, based upon Slope Angle and Slope Length.
Slope Morphology Factor	Automatically calculated, based upon Slope Height and Slope Angle.

When creating condition and inventory items you will also have the option to define a new Intermediate Slope Geometry at the start and end of the item.

You must link an Activity to the Slope Geometry on creation. This should be the Activity which triggered its creation. It can be an existing activity, or a newly created one. More Activities can be subsequently associated if needed.

When finished, click Save, and you will be taken to the details page for your newly created Slope Geometry object!

You should now liaise with a GAD Manager to Approve the new Slope Geometry.

Creating Non-Routine Maintenance Requirements (NRMRs)

NRMRs provide details of infrequent intervention to be undertaken on an object. They can be associated to Condition Sets, Condition Items and Inventory Items.

To create a NRMR, first navigate to the details page for the Set or Item, select NRMRs from the Section Menu and click Create NRMR.

A form to enter details about the NRMR will then appear.

Click HereHere for guidance on what should be entered for specific fields.

Field	Guidance
Type	Picklist field of different maintenance types
Details	Free text field to put in extra details of the NRMR
Frequency	Picklist value of frequency period (1-11). Mandatory if type field is entered.
Frequency unit	Either weeks, months or years. Mandatory if type field is entered.
To Be Confirmed	Tickbox field to mark whether NRMR needs to be confirmed.

When finished, click Save, and you will be taken to the NRMR section within the object details.