Dd No 1-7 (Matthias) is a dam located in Muscotah, Kansas, along the Walnut Creek-TR. Built in 1980 by the USDA SCS, this earth dam stands at a height of 27 feet and stretches 550 feet in length. With a primary purpose of flood risk reduction, it has a normal storage capacity of 44.51 acre-feet and a maximum storage of 142.68 acre-feet. Despite its low hazard potential and moderate risk assessment rating, the dam has not been inspected or rated for condition assessment.

Owned by the local government and situated in Atchison County, Kansas, Dd No 1-7 (Matthias) is not regulated by the state and does not have any associated structures. The dam's spillway type is uncontrolled, with a width of 65 feet. While there are no outlet gates or locks, the dam has a maximum discharge capacity of 298 cubic feet per second. With a surface area of 7.25 acres, the dam plays a crucial role in managing flood risks in the surrounding area.

For water resource and climate enthusiasts, Dd No 1-7 (Matthias) serves as an important infrastructure for flood risk reduction in the region. While its condition assessment is not rated and it lacks regular inspections, the dam's design and purpose highlight the ongoing efforts to manage water resources and mitigate potential hazards. As a key feature along the Walnut Creek-TR, this earth dam stands as a testament to the importance of sustainable water management practices in Kansas.