Dd No 1-7 (Matthias) Reservoir Report

Last Updated: December 13, 2025

Dd No 1-7 (Matthias) is a dam located in Muscotah, Kansas, along the Walnut Creek-TR.


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Summary

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.

Year Completed

1980

Dam Length

550

Dam Height

27

River Or Stream

WALNUT CREEK-TR

Primary Dam Type

Earth

Surface Area

7.25

Hydraulic Height

25

Nid Storage

142.68

Structural Height

27

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

27
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
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