Downloads
This site provides downloadable software and documents related to management of National Highways geotechnical and drainage assets. Please read the terms and conditions below before proceeding to download any files.
Further GDMS support is available at: https://help.gdms.assetia.cloud/
Terms and conditions
Downloadable files on the Geotechnical & Drainage Management Service (GDMS) Downloads web site are provided free of charge for use on behalf of National Highways only. Any other use is not permitted. You may not provide any of these files for download on any other web site or link directly to any individual files. Files may be periodically updated and you are responsible for checking you have the latest version of any file you use. Some files may be subject to further licence terms which will be shown during installation if applicable.
This web site and material relating to Government information, products and services (or to third party information, products and services), is provided 'as is', without any representation or endorsement made and without warranty of any kind whether express or implied, including but not limited to the implied warranties of satisfactory quality, fitness for a particular purpose, non-infringement, compatibility, security and accuracy.
We do not warrant that the functions of this site or the material contained in this site will be uninterrupted or error free, that defects will be corrected, or that this site or the server that makes it available are free of viruses or represent the full functionality, accuracy, reliability of the materials. In no event will we be liable for any loss or damage including, without limitation, indirect or consequential loss or damage, or any loss or damages whatsoever arising from use or loss of use of, data or profits arising out of or regarding the use of this web site.
These Terms and Conditions shall be governed by and construed in accordance with the laws of England and Wales. Any dispute arising under these Terms and Conditions shall be subject to the exclusive jurisdiction of the courts of England and Wales.
Please only proceed to download files if you agree with the above.
Downloadable files
General
Title | Published | Size (format) | Link | |
---|---|---|---|---|
GDMS API documentation (draft) rev02f | Oct 2024 | <1MB (ZIP) | Download | |
PDF Toolkit 2.1.0.1 including user manual and tutorials | 8 May 2019 | 32MB (ZIP) | Download |
Geotechnical
Title | Published | Size (format) | Link | |
---|---|---|---|---|
Geotechnical Properties Compendium v2 | Dec 2023 | 14MB (XLSX) | Download | |
Handover of geotechnical as-built information (May 2023) | May 2023 | <1MB (PDF) | Download | |
TabletGAD 1.2.2 (please contact GDMS support for installation guidance) | 21 Oct 2022 | 276MB (ZIP) | Download |
Drainage
Title | Published | Size (format) | Link | |
---|---|---|---|---|
Culvert User Guides and Worksheets ISSUE 1 | Oct 2010 | <1MB (ZIP) | Download | |
Flood Severity Index calculation method rev 9a | May 2016 | <1MB (PDF) | Download | |
GDMS drainage data formats v1.1 | 13 Nov 2024 | <1MB (XLSX) | Download | |
GDMS drainage data formats SHP file template v1 | Oct 2024 | <1MB (ZIP) | Download | |
HA219 Sedimentation Predictor v7.0 | Nov 2009 | <1MB (ZIP) | Download | |
LA113 HE Water Risk Assessment Tool (HEWRAT) spreadsheet and help guide v2.0.4 | Jun 2019 | 10.6MB (ZIP) | Download | |
MCHW Drainage Survey Method of Measurement (June 2019) | Jun 2019 | <1MB (PDF) | Download | |
Priority Outfalls User Guide ISSUE 1 | Oct 2010 | <1MB (PDF) | Download | |
RIS2 Drainage Resilience Metric Issue 3 | Apr 2024 | <1MB (PDF) | Download | |
RIS2 Drainage Resilience Metric 2021 training webinars recordings | Feb 2021 | video stream | Watch Online | |
RIS2 Drainage Resilience Metric 2021 training webinars slides and FAQs (combined PDF) rev02 | Apr 2021 | 4MB (PDF) | Download | |
Spill Severity Index calculation method rev 1b | Feb 2012 | <1MB (PDF) | Download | |
Soakaway User Guides and Worksheets ISSUE 1 | Oct 2010 | <1MB (ZIP) | Download |
Guidance
Title | Published | Size (format) | Link | |
---|---|---|---|---|
Guidance Note on the Field Identification and Classification of Geotechnical Observations V2.0 | Nov 2015 | 17MB (PDF) | Download | |
HAGDMS Slope Hazard Rating data description v2 | Aug 2017 | <1MB (PDF) | Download | |
Hazard guidance note: Aggressive/corrosive soil and groundwater v2.2 | Apr 2020 | <1MB (PDF) | Download | |
Hazard guidance note: Brine extraction v2.1 | Jun 2017 | <1MB (PDF) | Download | |
Hazard guidance note: Coal mining v6.0 | Nov 2023 | 2MB (PDF) | Download | |
Hazard guidance note: Compressible/collapsible ground v2.1 | Jun 2017 | <1MB (PDF) | Download | |
Hazard guidance note: Dissolution features v2.1 | Jun 2017 | <1MB (PDF) | Download | |
Hazard guidance note: Engineered rock slopes v2.1 | Jun 2017 | <1MB (PDF) | Download | |
Hazard guidance note: Engineered soil slopes v2.1 | Jun 2017 | <1MB (PDF) | Download | |
Hazard guidance note: Groundwater flooding v2.1 | Jun 2017 | <1MB (PDF) | Download | |
Hazard guidance note: Landfill sites v2.1 | Jun 2017 | <1MB (PDF) | Download | |
Hazard guidance note: Natural landslides v2.1 | Jun 2017 | 1MB (PDF) | Download | |
Hazard guidance note: Non-coal mining v2.1 | Jun 2017 | <1MB (PDF) | Download | |
Hazard guidance note: Shrink/swell susceptible soils v2.4 | Apr 2020 | <1MB (PDF) | Download | |
Implementation guidance on geological codification within AGS files submitted to National Highways v5b | Nov 2022 | 1MB (PDF) | Download |