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2022072 RFP for Spoonbill Marsh Maintenance 1. CONTRACTOR shall clean sump, screen and wet well two (2) times per year: once in March and September. If weather conditions prevent scheduled cleaning, cleaning will be rescheduled per the County. 2. Type II Turbidity Curtain may be required as a protective barrier for work area as shown in Drawing 4. Turbidity curtain shall be removed after County completes a site inspection. 3. An experienced diver, PADI certified or equivalent, is required for working inside of the wet well. 4. Sump, as shown in Drawing 4, the area between the wet well and the river and shall be cleaned two (2) times per year, once in late December and June. All accumulated muck and vegetation shall be removed down to hard pan or clean sand. Amount of accumulation varies. 5. CONTRACTOR shall not disturb rip rap lining at the edge of sump. 6. Wet well is the concrete structure housing the pumps. All accumulated sand, muck, and vegetation shall be removed from the inside of wet well. All mollusks shall be scraped from wet well walls and removed from site. 7. CONTRACTOR shall remove all debris from pump screen baskets. 8. CONTRACTOR shall be present when County lifts turbine pumps from wet well for inspection. 9. Trash screen is the V-shaped structure attached to the front of the wet well. All mollusks shall be scraped from the inside and outside of the screen. CONTRACTOR shall note condition of the sump, trash screen, and wet well and submit a written report via an e-mail of conditions to the COUNTY. 10. CONTRACTOR shall remove all debris from the site after cleaning of sump, trash screen, and wet well and dispose on Spoonbill site designated by County staff. 11. CONTRACTOR shall restore site, in kind, to include grading and covering with hay as needed. ITEM NO. 5 MANATEE SCREEN CLEANING 5.1 Summary 1. CONTRACTOR shall furnish all labor, equipment, and incidentals required to clean the manatee screen. 2. Manatee screen is located directly in the lagoon and is subject to wind and tidal conditions. 3. Manatee screen is shown in Drawing 5. 5.2 Frequency and Conditions 1. COUNTY shall supply all building material used in manatee screen maintenance. 2. CONTRACTOR shall remove all accumulation of debris from the manatee screen to insure waterflows into the sump free of obstructions. CONTRACTOR shall remove all blockage within 24 hours of COUNTY request to clean screen. NOTE: An algae, commonly known as grassilaria, blooms in warm weather and accumulates on the manatee screen impeding flow. 3. Manatee screen shall be repaired and maintained as directed by the COUNTY. 4. Contractor shall submit an hourly rate. The work requirements will vary. ITEM NO. 6 BOARDWALK MAINTENACE 6.1 Summary 1. COUNTY shall supply all building material used in boardwalk maintenance. 2. Material to be used: Scope Page 4 370