Stormwater Pond Structures Problems and Issues

By: Johnny Foster

Pond Structures Problems and Issues

Dam Primary drain Emergency spillway Energy dissipater Emergency spillway Valve Inlet/outlet pipes and channels Forebay & forebay berm Vegetative shelf Fences

Dam Seepage at

downstream toe or abutment

Shoreline erosionSloughing or sink

holesVegetation

managementAnimal damage

Pond Structures Management

Primary Drain Clear any trash or debris

monthly or after 1 inch of rain

Check condition of trash rack

Look for corrosion, chipping, pipe separation, cracks, erosion at discharge

Look for seepage into or along drain

Pond Structures Management

Emergency Spillway Repair erosion, gullies or any

type of damage Repair turf matting or exposed

underlayment fabric Repair dislodged or displaced

stone Should have wide flat bottom Should have gentle slope

Pond Structures Management

Energy dissipater Repair erosion or damageRemove sediment depositsRemove woody vegetationRepair dislodged or

displaced stoneAdd stone on exposed

underlayment fabric

Pond Structures Management

Drain valve Should be operable and

excercisedRepair damaged supportsClear upstream debris or

sediment before openingKeep lubricatedMaintain the lock

Pond Structures Management

Inlet/Outlet Pipes and Channels Repair corrosion, chipping,

pipe separation, cracks, collapse or adjacent erosion

Remove sediment depositsRemove woody vegetationRepair displaced stone or

exposed fabricRepair damaged turf

matting

Pond Structures Management

Forebay and Forebay Berm Remove sediment depositsManage vegetationRepair erosionRepair animal damageMaintain berm height and

spillway designReplace displaced stone on

berm

Pond Structures Management

Vegetative Shelf Repair erosionManage vegetationRemove trash and debrisRepair animal damageMaintain design width

and slope

Pond Structures Management

Fences Repair damageMaintain gate and lockRemove damaging

woody vegetationRepair animal damage

and gaps at bottom

Pond Structures Management

QUESTIONS?