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CA Contract #SD609AA Expected Results: Complete and adequately construct facilities. Estimated Cost: Construction of the stormwater facility at Oak Lake Area (52.000 cubic yards at $2.5/cubic yard) is estimated to cost $130,000.00. Construction of the stormwater facility at Lake 20 Area (92,000 cubic yards at $2.51cubic yard) is estimated to cost $230,000.00. Estimated Schedule: Oak Lake Area constriction will begin in July 2000 and end in June 2001. Lake 20 Area construction will begin in Septcmhcr 2000 and end in March 2001. Deliverables: Bi -Monthly Progress Reports on construction status. The acceptance of tite facilities as completed facilities according to design. Task b: Construction of Lake Control Structures for Water Quality Treatment tic lsrosion Control Description: Two lake control structures will be constructed within the two storruwater pond treatment facilities, including concrete control structures and erosion control structures at the outlet. 1. At Oak Lake, an RCLake9 Structure will be installed with 40 linear feet of 48 -inch reinforced pipe. 2. At Elie Lake 20 Area, an RCLakc2U Structure will be constructed with approximately 1,400 linear feet of 48 -inch reinforced pipe, Two other strictures including an inter -lake connection structure of 400 linear feet of 24 -inch reinforced pipe and a clay barrier of 1,140 linear feet will be constructed within this pond system, At Pond A, an RLakeA Structure will be constructed and will have approximately 60 linear feet of 24 -inch reinforced pipe. ) xpeeted Results: Installation of lake control structures at tate two major pond systerus. Estimated Cost: Construction of the stornrwater facility structures is estinrued to cost $228,000.00. The Oak Lake Area RCLnke9 structure is estimated to cost $1 1,(W.00; the Lake 20 Area RCLakc20 structure is estimated to cost $134,000.00; the Lake 20 Area inter -lake connection structure and clay barrier is estimated to cost $75,000.00; and the Lake A. RLakeA structure is estimates] to cost $8,UOU.00. Estimated Schedule: Start April 2000, finish March 2001 Deliverables: Bi -Monthly Progress Reports our construction status. Two major pond structures and aclay barrier stricture in the two storrnwater treatment facilities. Task 7: hitch Excavation Description: Simultaneous to (lie construction of the pond systems, COUNTY will conduct ditch excavation of four major canal systems connecting the detention ponds it) the Lateral D canal. Ditch excavations will include cleaning, widening and new construction of several canal crossings within Canal A and excavation of a new canal at 86"' Street both of which connect to Page 14 of 28