Exploration Green Detention Facility Phase 3B

Scope of Work: 1. Enclose entire site with orange plastic construction fencing throughout construction prior to beginning clearing and grubbing. 2. Protect trees, shrubs, lawns and utilities outside of proposed upper bank of channel. 3. Install, maintain and remove stabilized construction entrance/exit and Storm Water Pollution Prevention Program elements (Appendix B). Install black filter fabric fencing prior to any earthwork. 4. Implement and maintain a traffic control plan and pedestrian control plan. 5. Remove, by clearing and grubbing, any trees and shrubs within the upper bank. Contractor to coordinate with Owner and Engineer to remove trees outside or near upper bank. Upper Bank shall be sufficiently staked prior to clearing and grubbing to allow Owner to determine which trees to preserve. Remove portions of sanitary sewer lines and manholes as shown on the plans and dispose of off-site. Remove any existing A.C. waterline, outfalls, and utility lines uncovered during excavation and dispose per OSHA standards. 6. Excavate the channel to the lines and grades shown on the plans. Haul off and dispose of off-site all unused excavated material, including all unsuitable soils encountered as detailed by Section 02323. 7. Clean the streets every evening after any off-site hauling operations. 8. Excavate unsuitable material beyond proposed grade to install 2-foot thick clay liner. The clay liner will be contained within a boundary 4 feet outside the normal water surface elevation. 9. Install backslope and urban interceptor structures and HDPE outfall pipes. 10. Install rip rap for erosion prevention of soils around interceptor structure outfalls and concrete confluence. 11. Install 18-inch SDR 26 PVC sanitary sewer and proposed sanitary sewer manholes. 12. Apply cementitious materials and epoxy materials to sanitary sewer manholes. 13. Install 6-inch thick, 10-foot wide concrete access drive along the high bank of the channel, including 4-Inch PVC irrigation sleeves under the proposed reinforced concrete access drive, perpendicular to proposed hose bibs, for future irrigation connections. 14. Haul in, place and install 1-inch compost, mixed with two inches of top soil, tilled in four to six inches. Then place a 2-inch compost overlay on all areas from the filter fabric fence to the normal water surface elevation of the channel. Alternatively, the Contractor may take soil samples of placed topsoil for soil testing. 15. Based on the result of the soil test and with approval of the Owner’s reresentative, topsoil may be amended to address any soil deficiencies that would prohibit the growth of the seed. 16. Place native grass seed mix, wildflower seed mix, and/or cereal rye seed mix in the area within the filter fabric fencing to the normal water surface elevation of the channel after seed bed is prepared, as directed by the Engineer. 17. Apply hydro mulch to all seeded areas. In general, this work for the total federally funded amenity bid segment consists of: 1. Additional maintenance of Storm Water Pollution Prevention Plan (SWPPP), installed under the total base bid segment, for the purpose of the Federal Grant Funds, as directed by Engineer. 2. Additional maintenance of traffic control plan, for the purpose of the Federal Grant Funds, as directed by Engineer. 3. Install 2-inch (purple) polytubing re-claimed irrigation line and appurtenances and connect to existing system. 4. Install 6-inch thick, 10-foot wide concrete trail along the upper bank of the channel, including 4-Inch PVC irrigation sleeves under the proposed reinforced concrete trail, perpendicular to proposed hose bibs, for future irrigation connections. 5. Remove and replace damaged portions of existing sidewalk and driveway. 6. Contractor shall coordinate with the Engineer on Owner’s as-built surveys, wildlife removal from site and Conservancy planting of trees. 7. Contractor shall comply with instructions laid out in the Interlocal agreement between Harris County Flood Control District (HCFCD) and the CLCWA found in Appendix A. 8. Site cleanup shall be incidental to the project.

Division 31 -	Earthwork, Erosion and Sedimentation Controls.
Division 33 -	Utilities, Storm Drainage Utilities, Ponds and Reservoirs.