• Dam Name

  • Dam inventory number

  • Conducted on

  • Inspector

  • Others present:

  • If there are changes in ownership or contact info, note it here.


Field Conditions

  • Pool Level

  • Describe water level

  • Ground Moisture Condition

  • Any changes in downstream land use that may impact hazard classification of dam?

Upstream Slope

  • Slope appears too steep?

  • Slope has poor vegetative cover?

  • Slope contains trees and/or brush?

  • Cracks on the embankment slope?

  • Wave erosion at the water line?

  • Embankment has sinkholes, depressions, slides, or bulges?

  • Animal burrows on the embankment?

  • Upstream Slope General Notes

  • Photo of Upstream Slope

  • Sketch

Top of Dam

  • Cracks, unusual settlement, or sinkholes along the top of dam?

  • Is the top width uniform and adequate?

  • General Notes:

  • Photo of Top of Dam

Downstream Slope

  • Slope appears too steep?

  • Slope has poor vegetative cover?

  • Slope contains trees and/or brush?

  • Embankment has sinkholes, depressions, slides, or bulges?

  • Cracks on the embankment slope?

  • Animal burrows on the embankment?

  • General Notes

  • Downstream Slope Photo

  • Sketch

Internal Drainage and Seepage

  • Does the dam have internal embankment drains?

  • Description

  • Outlets were observed and in good condition?

  • Estimated flow from drains (describe each drain separately):

  • Photo(s) of outlets.

  • Was seepage observed through the embankment outside of designated drains?

  • The seepage appeared clear with no signs of ongoing internal erosion.

  • Immediate Action is Required at the Dam! The Emergency Action Plan should be activated if there is one in place. If no EAP, the Emergency Manager may need to be alerted and the dam put on a monitoring schedule.

  • Describe location and extent of seepage.

  • Seepage photos

  • Sketch of seepage location

  • General Internal Drainage and Seepage Notes:

Principal Spillway

  • Description of spillway

  • Is the inlet free from debris?

  • Are there trees and brush around the inlet?

  • Inlet photos

  • Does the dam have a conduit spillway?

  • Is the trash rack and anti-siphon device in good condition?

  • Is riser/inlet in good condition?

  • Does the conduit appear structurally sound including water tight joints?

  • Are there signs of flow beneath or around the conduit?

  • Does the dam have an open chute spillway?

  • Do the joints appear to be watertight?

  • Does the chute have a drainage collection system?

  • Are the outlet drains visible and clear of obstruction?

  • Describe the amount of flow from the each outlet.

  • Are there signs of flow beneath or around the spillway outside of designated drains?

  • Does it appear that erosion of material is occurring?

  • Is the concrete in a generally good and sound condition?

  • Is there erosion around the spillway outlet?

  • Are there trees and brush around the outlet?

  • Outlet Photos

  • Is there a low level drain?

  • Description:

  • Does the gate appear watertight?

  • Has the gate been exercised in the last year?

  • Are the gate structural elements in good condition?

  • Photos

Auxiliary Spillway

  • The dam has an auxiliary spillway.

  • Description:

  • Is the spillway free of obstructions?

  • Is there an adequate vegetative cover free of trees and brush?

  • Is the spillway free from erosion?

  • Auxiliary Spillway Photos

  • Inspection notes for auxiliary spillway.


Perform the following ongoing maintenance:

  • Exercise and perform required maintenance on gate.

  • Mow or burn the vegetation on the dam.

  • Clear vegetation from riprap areas.

  • Remove debris from spillway inlet.

  • Other (see notes):

  • Notes

Monitor the following items that were detailed in previous sections of the report. Report any significant changes to the DNR.

  • Seepage.

  • Minor erosion.

  • Minor embankment depressions or slides.

  • Other (see notes):

  • Notes

The following items need to be properly repaired/rectified:

  • Clear trees and brush from embankment and spillway areas.

  • Backfill rodent burrows and initiate rodent control program.

  • Repair and stabilize eroded areas.

  • Other (see notes):

  • Notes

Employ an engineer/contractor experienced in design and construction of dams to:

  • Perform a geotechnical evaluation to determine cause of slides and/or depressions.

  • Evaluate and repair spillway structures.

  • Develop plans and specifications for proper repair of the dam.

  • Other (see notes):

  • Notes

Overall Condition

    No existing or potential dam safety deficiencies recognized. Safe performance is expected under all anticipated loading conditions, including such events as infrequent hydrologic and/or seismic events.

    No existing dam safety deficiencies are recognized for normal loading conditions. Infrequent hydrologic and/or seismic events would probably result in a dam safety deficiency.

    A potential dam safety deficiency is clearly recognized for normal loading conditions. Immediate actions to resolve the deficiency are recommended; reservoir restrictions may be necessary until problem resolution.

    A dam safety deficiency exists for normal conditions. Immediate remedial action is required for problem resolution.

  • Overall Rating of Dam Condition

  • General Notes

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