A. The work involves installing one new production well for the Bullhead City public water supply system. Well 6-1 will provide a new well supply location. This work includes drilling, construction, development, testing and disinfection of the new well. The intent of the project is to drill and construct the new water supply wells with a design capacity of 1,500 gpm or greater. B. Well 6-1 is to be constructed to the following design dimensions. The actual final depths shall be finalized by the Engineer from the pilot hole drilling results and provided to the Contractor within 5 days following pilot hole completion and receipt of the sieve analysis results. Depth of Conductor Casing (feet) 100 Pilot Hole (feet) 630 Final Casing Size (inches) 20 Top of Final Casing (feet) -2 Bottom of Final Casing (feet) 320 Top of Screen (feet) 320 Bottom of Screen (feet) 610 Top of Sump (feet) 610 Bottom of Sump (feet) 620 1. Preparation of and submittal for approval of all submittals required for this work. 01 33 00. 2. Mobilization and demobilization of all necessary personnel, equipment and materials for completion of the Work. 33 21 13.01. 3. Site preparations for Work, including initial clearing of the well site within the temporary construction limits, security fencing as required, and cleaning up the site. 33 21 13.01 4. Installation of 36-inch conductor casing and cement grout seal. 33 21 13.06. 5. Pilot borehole drilling. 33 21 13.03. 6. Sieve analysis. 33 21 13.03 7. Geophysical logging, caliper, and plumbness and alignment surveying of the pilot borehole. 33 21 13.04, 33 21 13.11. 8. Borehole reaming. 33 21 13.03. 9. Installation of 20-inch stainless steel well screen and carbon steel well casing coupled with a di-electric coupling. 33 21 13.07. 10. Installation of gravel pack between reamed borehole and 20-inch well screen. 33 21 13.07. 11. Installation of a grout seal from the top of the gravel pack to ground surface. 33 21 13.08. 12. Conducting air-lift swabbing and over-pumping development of new wells. 33 21 13.09. 13. All necessary arrangements for the discharge of water from the new well to the designated point of discharge in accordance with all Federal, State, and Local requirements, including installation and removal of the temporary piping. 33 21 13.09. 14. Conducting step-rate discharge testing at the new well. 33 21 13.10. 15. Conducting constant-rate discharge testing. 33 21 13.10. 16. Conducting final baseline surveying of the well including video logging and plumbness and alignment surveying. 33 21 13.12, 33 21 13.11. 17. Conducting final disinfection and capping of the well. 33 21 13.13. 18. Optional Existing Well 17-1 abandonment. 33 21 13.14. 19. Final site cleanup and restoration. 33 21 13.01.
