DWR Dam Safety

To download this layer or other datasets, explore our Open Data Hub (https://gis-mhfd.hub.arcgis.com) For questions about this layer, please reach out to [e-mail] or call 303-455-6277. Data for this layer is supplied by the Department of Water Resources and updated by the MHFD monthly. Last Updated: 1/14/2026 A Jurisdictional Dam is a dam creating a reservoir with a capacity of more than 100 acre-feet, or creates a reservoir with a surface area in excess of 20 acres at the high-water line, or exceeds 10 feet in height measured vertically from the elevation of the lowest point of the natural surface of the ground where that point occurs along the longitudinal centerline of the dam up to the crest of the emergency spillway of the dam. For reservoirs created by excavation, or where the invert of the outlet conduit is placed below the surface of the natural ground at its lowest point beneath the dam, the jurisdictional height shall be measured from the invert of the outlet at the longitudinal centerline of the embankment or from the bottom of the excavation at the longitudinal centerline of the dam, whichever is greatest. Jurisdictional height is defined in Rule 4.2.19. The State Engineer shall have final authority over determination of the jurisdictional height of the dam.

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本图层数据由水资源部（Department of Water Resources）提供，MHFD每月更新一次。最后更新时间：2026年1月14日。
管辖性水坝（Jurisdictional Dam）指满足以下任一条件的水坝：所形成水库的库容超过100英亩-英尺；或在高水位线处，所形成水库的表面积超过20英亩；或从沿坝体纵向中心线处的自然地面最低点高程，垂直测量至该坝应急溢洪道坝顶的高度超过10英尺。
对于由开挖形成的水库，或当泄水管道的管底低于坝体下方自然地面最低点的情况，管辖高度应从坝体纵向中心线处的泄水口管底，或坝体纵向中心线处的开挖底部两者中取最大值进行测量。
管辖高度的定义详见第4.2.19条规则。州工程师对水坝管辖高度的判定拥有最终决定权。