Sanitation facilities construction branch guidelines
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FINAL REPORT on the COMMUNITY WATER SUPPLY AND WASTE DISPOSAL FACILITIES Tachee – Blue Gap, Phase I Tachee – Blue Gap Chapter, Navajo Nation Apache County, Arizona Indian Health Service Project No. NA-97-L77
Prepared for U.S. Department of Health and Human Services Public Health Service Indian Health Service Office of Environmental Health and Engineering Division of Sanitation Facilities Construction Navajo Area Indian Health Service Window Rock, Arizona
by Technical Services Section DSFC, OEHE, NAIHS January 2003 Recommended by Approved by _______________________ _______________________ Jeffrey J. Nolte, P.E. Charles O. Dowell, P.E. Director, DSFC Director, OEHE TABLE OF CONTENTSPage
LIST OF TABLESTable 1. Chronology of Events 2 Table 2. Water Supply Facilities 3 Table 3. Sewage Disposal Facilities 4 Table 4. Plumbing 4 Table 5. Project Participant List 4 Table 6. Cost of Facilities Installed 6 APPENDICES Appendix A Engineering Report Appendix B Memorandum of Agreement Appendix C Right-of-Way Documents Appendix D Transfer Agreement ii FINAL REPORT on the COMMUNITY WATER SUPPLY AND WASTE DISPOSAL FACILITIES Tachee – Blue Gap, Phase I Tachee – Blue Gap Chapter, Navajo Nation Apache County, Arizona Indian Health Service Project No. NA-97-L77
Tachee-Blue Gap community is located in northeastern Arizona within the Navajo Nation. The project area is located 30 miles west of Chinle, Arizona on Bureau of Indian Affairs (BIA) Highway Rt. 4.PROJECT HISTORYOn October 28, 1994 the Tachee-Blue Gap Chapter of the Navajo Nation submitted a project proposal to the IHS requesting assistance in providing sanitation facilities under P.L. 86-121 to serve 73 existing homes. The IHS, OEHE, developed a Project Summary which recommended that the Burnt Corn Valley Water System be extended and that community water service and individual waste disposal facilities be installed to serve 62 homes. The Project Summary was approved in February 1997 and assigned project number NA-97-L77. A Memorandum of Agreement (MOA) between the Navajo Nation; the IHS; the Navajo Engineering and Construction Authority (NECA), an enterprise of the Navajo Nation; the Navajo Tribal Utility Authority (NTUA), an enterprise of the Navajo Nation; and the Environmental Protection Agency (EPA) was executed on August 6, 1997. This Agreement stipulated the provisions of the project, including areas of responsibility, types of facilities, and method of construction (see MOA Appendix). On June 29, 1998 a letter serving as Amendment No. 1 to the Memorandum of Agreement was executed to decrease the not-to-exceed level from $1,162,000 to $1,037,000 for the completion of sanitation facilities construction. Construction of Project NA-97-L77 started in June 1998 and was completed by December 1998. Table 1 is a chronology of significant documents and events pertaining to Project NA-97-L77. Table 1. Chronology of Events Event: Date: Project Proposal October 1994 Planning Agreement August 1996 Project Summary February 1997 Memorandum of Agreement August 1997 Amendment No. 1 June 1998 Project Construction Started June 1988 Completed December 1998 Transfer Agreement March 2000 Final Report January 2003 SUMMARY OF FACILITIES INSTALLED The NECA constructed the facilities for this project, excluding the interior plumbing. The IHS made a contribution to the NECA to cover their nonprofit project costs. The IHS also provided engineering services and construction materials. The IHS provided the materials and labor for the installation of the interior plumbing. Bathroom additions were constructed by the Tachee-Blue Gap Chapter for homes requiring additions. Facilities installed under project NA-97-L77 include 54,690 feet of 6-inch, 17,008 feet of 4-inch, and 18,720 feet of 2-inch water main with all necessary appurtenances such as gate valves, flush valves, air release valves, and wash and road crossing material. Individual one-inch water service connections were made to all 62 homes. All homes required individual pressure reducing valves. On-site wastewater disposal facilities for all homes consisted of a 1,000-gallon septic tank and drainfield. Tables 2, 3, and 4 summarize the facilities installed under Project NA-97-L77. Table 2. Water Supply Facilities No. of Population* Homes Type of Facility Units Served Served
4-inch PVC Pipe 17,008 Ft. 310 62 2-inch PVC Pipe 18,720 Ft. 310 62 6-inch Gate Valve, CI 57 Ea. 310 62 4-inch Gate Valve, CI 22 Ea. 310 62 2-inch Gate Valve, CI 32 Ea. 310 62 2-inch Flush Valve assembly 26 Ea. 310 62 1-inch ARV 10 Ea. 310 62 5/8-inch x ¾-inch Meters 62 Ea. 310 62 1-inch PE House Services 62 Ea. 310 62 _____ * Population is estimated at five persons per home. Table 3. Sewage Disposal Facilities No. of Population* Homes Type of Facility Units Served Served
Table 4. Plumbing No. of Population* Homes Type of Facility Units Served Served Kitchen Sinks 50 Ea. 250 50 Bathtubs 50 Ea. 250 50 Flush Toilets 50 Ea. 250 50 Lavatories 50 Ea. 250 50 Rough In 50 Ea. 250 50 Water Heaters 50 Ea. 250 50 Table 5. Project Participant List Water System Septic Tank/ Plumbing** Homeowner Service Name Drainfield R K W L B WH
(Continued) _____
* Population is estimated at five persons per home. ** Plumbing R = Rough-in K = Kitchen Sink W = Water Closet L = Lavatory B = Bathtub WH = Water Closet Table 5. Project Participant List - Continued Water System Septic Tank/ Plumbing** Homeowner Service Name Drainfield R K W L B WH
(Continued) _____
** Plumbing R = Rough-in K = Kitchen Sink W = Water Closet L = Lavatory B = Bathtub WH = Water Closet Table 5. Project Participant List - Continued Water System Septic Tank/ Plumbing** Homeowner Service Name Drainfield R K W L B WH
ANALYSIS OF PROJECT COSTS Project NA-97-L77 costs totaled $822,069. The average cost per home for this project was $13,259. The Environmental Protection Agency (EPA) contributed $329,000 to the project. Table 6 details Project NA-97-L77 costs. Table 6. Cost of Facilities Installed Item Description Total Construction and Materials $675,026 Support Services 139,481 Miscellaneous 7,562
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** Plumbing R = Rough-in K = Kitchen Sink W = Water Closet L = Lavatory B = Bathtub WH = Water Closet CONSTRUCTION EXPERIENCE Construction was completed without complications. OPERATION, MAINTENANCE, AND TRAINING The IHS, OEHE, offered training to the homeowner, emphasizing the proper use and maintenance of on-premise facilities and giving attention to the health benefits which result from the proper use of these facilities. The responsibility to operate and maintain the community facilities constructed under this project rests with the NTUA. The NTUA personnel involved in operation and maintenance of these facilities received initial training from the IHS and have the opportunity to participate in the IHS on-going training for water and sewer systems operation and maintenance. RIGHT-OF-WAY The IHS obtained right-of-way and archaeological clearance for all facilities constructed under this project. Copies of right-of-way documents including grants-of-easement and affidavits-of-completion are included in the Right-of-Way Appendix in this report. TRANSFER OF OWNERSHIP The community facilities were transferred to the Navajo Nation on May 30, 2000. The individual facilities were transferred to the individual homeowners at the same time. ACKNOWLEDGMENTS This Final Report was prepared by Rosalyn Roanhorse, Technical Writer, TSS, DSFC, OEHE, NAIHS, using information in the project files and a draft narrative prepared by Robert Morgan, Project Manager, OEHE, Many Farms Field Office. Yüklə 46,68 Kb. Dostları ilə paylaş:
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