EASTER LAKE DETENTION BASIN IMPROVEMENTS

What are the Easter Lake Detention Basins?

What are the Issues?

What are the Improvements?

Detention BasinsDetention Basin WatershedEaster Lake Watershed

• Create deeper sediment capture areas (forebay) to improvewater quality and maintenance.

• Remove sediment and restore original pond depths.

• Steepen banks below the water to reduce algae.

• Provide taller grass buffer around the shoreline to reduce goosetraffic and filter stormwater.

• Work with the Easter Lake dredging project to further improvewater quality over the long-term!

• Shallow areas allow algaeto form which reduces waterquality.

• At 25% full, Basins needto be cleaned to improvesediment capture and waterquality.

• Basins not as effective atimproving Easter Lake waterquality as they could be.

BENEFITS• Capture sediment before it

flows into Easter Lake.• Detain stormwater and

reduce flows downstream.• Provide natural features for

neighborhood and regionaltrail system.

• Owned by City and Constructed 10-20 years ago.

• Detention Basins receive over 20% of EasterLake’s Watershed.

EXISTING DETENTION BASIN IMPROVED DETENTION BASIN

N

Temporary Flood Storage

Permanent Pool

25% Full of Sediment

Plant Wider Grass Buffer

Steepen Banks Remove Sediment

Algae and Surface

Vegetation