--- title: Practical nomograms for waste rock piles design on competent foundations (Disponible en anglais seulement) date: 2018-11-02T14:40:00-04:00 author: jessica napert canonical_url: "https://www.bbaconsultants.com/fr-ca/publications/practical-nomograms-for-waste-rock-piles-design-on-competent-foundations-disponible-en-anglais-seulement" section: Publications --- 1. Waste Rock Piles can measure hundreds of meters in height and their failure can put life and property at extreme risk as well as significantly impact the surrounding environment. As such, waste rock piles should be considered structures, rather than dumps. Waste rock piles geometry and height is site-specific and govern the level of risk associated to its construction, operation and management. However, the design of these structures does not always garner the rigorous attention that they should be afforded. This paper provides practical nomograms for designing waste rock piles on solid competent foundations. In cohesionless soils, commonly placed using end-dumping methods, the stability of the stockpile slope depends on the angle of internal friction (Ø), slope angle and the height, for a given depth of critical slip failure. The nomograms presented herein are based on the requirement of attaining an overall factor of safety of 1.5 and a local factor of safety of 1.2. Note that this white paper was the subject of a presentation at the Tailings and Mine Waste’18 Conference in Colorado State University. Ce contenu est fourni uniquement à des fins d’information générale. Tous droits réservés ©BBA 1. ![Luciano Piciacchia](https://www.assets.bbaconsultants.com/bba-production-assets/production/images/avatars/_size_avatar/3206/Luciano-Piciacchia.webp) Luciano Piciacchia, ing., Ph. D. Expert-conseil senior, Sol et Infrastructure [ ](https://www.linkedin.com/in/lucianopiciacchia/) 2. ![Vahid Marefat](https://www.assets.bbaconsultants.com/bba-production-assets/production/images/avatars/_size_avatar/3194/Vahid-Marefat.webp) Vahid Marefat, ing., Ph. D. Ingénieur sénior, Sol et infrastructure [ ](https://www.linkedin.com/in/vahidmarefat/) - [ 17 août 2026 Phase de base de l'ingénierie structurelle: créer de la valeur dès les premières décisions - ![Nicolas Samson](https://www.assets.bbaconsultants.com/bba-production-assets/production/images/avatars/_size_avatar/197852/Nicolas-Samson.webp) Nicolas Samson, ing. Ingénieur sénior, Structure ](https://www.bbaconsultants.com/fr-ca/perspectives/phase-de-base-ingenierie-structurelle-creer-valeur-des-les-premieres-decisions "Phase de base de l'ingénierie structurelle: créer de la valeur dès les premières décisions") - [ 12 août 2026 Les quatre erreurs qui nuisent à la performance future d'un actif industriel - ![Caroline provost](https://www.assets.bbaconsultants.com/bba-production-assets/production/images/avatars/_size_avatar/208557/Caroline-provost.webp) Caroline Provost ing. Directrice, Mise en œuvre de stratégie d’opération ](https://www.bbaconsultants.com/fr-ca/perspectives/quatre-erreurs-qui-nuisent-a-la-performance-future-dun-actif-industriel "Les quatre erreurs qui nuisent à la performance future d'un actif industriel") - [ 27 juill. 2026 Mines et métaux Vos décisions liées aux résidus miniers influencent la performance à long terme - ![Geraldine Cosset](https://www.assets.bbaconsultants.com/bba-production-assets/production/images/avatars/_size_avatar/206707/Geraldine-Cosset.webp) - ![Jared Purdy](https://www.assets.bbaconsultants.com/bba-production-assets/production/images/avatars/_size_avatar/212424/Jared-Purdy.webp) ](https://www.bbaconsultants.com/fr-ca/perspectives/decisions-liees-aux-residus-miniers-influencent-performance-long-terme "Vos décisions liées aux résidus miniers influencent la performance à long terme") - [ 02 juill. 2026 Mines et métaux Python : un outil clé pour l’analyse des données en traitement des minerais - ![Charles Blais](https://www.assets.bbaconsultants.com/bba-production-assets/production/images/avatars/_size_avatar/211197/Charles-Blais.webp) - ![Juan Pablo Vergara](https://www.assets.bbaconsultants.com/bba-production-assets/production/images/avatars/_size_avatar/211266/Juan-Pablo-Vergara.webp) ](https://www.bbaconsultants.com/fr-ca/perspectives/python-un-outil-cle-pour-analyse-donnees-en-traitement-minerais "Python : un outil clé pour l’analyse des données en traitement des minerais") [ Voir tout ](https://www.bbaconsultants.com/fr-ca/perspectives "Aller à la page Publications") Poussons la réflexion ensemble [ Contactez-nous ](https://www.bbaconsultants.com/fr-ca/contact) 1. Waste Rock Piles can measure hundreds of meters in height and their failure can put life and property at extreme risk as well as significantly impact the surrounding environment. As such, waste rock piles should be considered structures, rather than dumps. Waste rock piles geometry and height is site-specific and govern the level of risk associated to its construction, operation and management. However, the design of these structures does not always garner the rigorous attention that they should be afforded. This paper provides practical nomograms for designing waste rock piles on solid competent foundations. In cohesionless soils, commonly placed using end-dumping methods, the stability of the stockpile slope depends on the angle of internal friction (Ø), slope angle and the height, for a given depth of critical slip failure. The nomograms presented herein are based on the requirement of attaining an overall factor of safety of 1.5 and a local factor of safety of 1.2. Note that this white paper was the subject of a presentation at the Tailings and Mine Waste’18 Conference in Colorado State University. Ce contenu est fourni uniquement à des fins d’information générale. Tous droits réservés ©BBA