AJ Jolly Park Concrete Riser and Valve Replacement and Annual Inspection and Exercising of Control Valve

Concrete riser and valve replacement. General guideline for the project: 1. Repair broken valve stem guides. 2. Use existing outlet valve to lower the lake down to approximate elevation 673 feet. A. It is anticipated that the lowering of the lake through the outlet valve will take approximately 3 to 4 weeks. Contractor to close valve on a weekly basis and let culvert pipe drain before reopening. B. Contractor to provide options for stopping water discharge in the event that the valve does not close or seal. 3. Install new blind flange with gasket to seal the existing inlet pipe (underwater work). Design and provide details and calculations for blind flange. 4. Open existing valve to drain the pipe and verify effectiveness of blind flange seal. 5. Remove existing valve stem and valve.