Blackberry Creek Bridge & Dam Construction

: The Park Pond Parking Lot.

: The dam is notched to lower the creek water level for construction activities to begin, but not low enough to release streambed sediments.

: The channel looking East from Creek Coffer Dam #2.

: The creek channel looking West from temporary Creek Coffer Dam #1.

: The temporary creek bypass channel from the outlet end of Park Pond.

: Removal of stream bed sediment looking West.

: The temporary creek bypass outlet from Park Pond.

: The temporary creek bypass flowing into the West end of Park Pond through bypass box culverts with Coffer Dam #2 located to the right.

: The restored channel bottom looking East from Coffer Dam #2 with the sediment removed.

: Wetland preservation channel/temporary bypass – view looking East.

: Wetland preservation channel in foreground connecting to temporary drop outlet being constructed through the West corner of the existing dam.

Removal of Blackberry Creek Dam

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Construction of Blackberry Dam Removal

4 Phases for Implementation

Phase 1 – IDNR and YBSD Forces
Phase 2 – City of Yorkville Contractor
Phase 3 & 4 – IDNR Contractor

Phase 1 – OWR Maintenance Crew (Spring 2012)

Notch the Dam
Clear Construction / Maintenance Access
Build Wetland Preservation Berm around Wetland Area
Expand Park Pond
Excavate and stabilize Wetland Preservation Channel

Phase 2 – City of Yorkville Contractor (Winter 2013)

Install Outlet Structure and pipe

Phase 3 – OWR Contractor (Winter 2012-2013)

Build Temporary Diversion Through Park Pond
Install Coffer Dams
Remove Sediment and Stabilize Channel Between Riffle #2 and Riffle #3
Remove Coffer Dam upstream of Riffle #3 (water into new wetland bypass)
Remove Diversion through Park Pond

Phase 4 – OWR Contractor (Winter / Spring 2013)

Remove Sediment and Stabilize Channel Between Riffle #2 and Dam
Build Riffle #1
Complete Dam Removal Per Plans
Remove Coffer Dam Downstream of Riffle #2
Build up Construction / Maintenance Access Road around small pond to an elevation of 587.0
Remove or Backfill Outlet Structure and Pipe