Denver regulates site grading and drainage under the Denver Building Code and DRMC Chapter 56 to ensure proper stormwater management and prevent damage to adjacent properties. The Department of Transportation and Infrastructure (DOTI) and Community Planning and Development (CPD) review grading plans for compliance with the Urban Storm Drainage Criteria Manual (USDCM).
Grading permits are required for significant earthwork. All developments must provide positive drainage away from structures and must not increase stormwater runoff to adjacent properties. The USDCM published by the Mile High Flood District sets design criteria for drainage infrastructure. Denver requires detention or water quality treatment for new development. Grading within floodplains or near waterways requires additional review. Retaining walls over four feet require structural engineering review.
Grading without required permits or causing drainage problems to neighboring properties can result in code enforcement action. Violations of drainage requirements may carry penalties up to $999 per day under DRMC Chapter 56. The city may require corrective grading and restoration at the property owner's expense.
Denver, CO
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