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80 Long Questionnaire A P P E N D I X C The following questions have been prepared with multiple choice answers for ease of use but should in no way limit your response. We do not have all the answers so the proper response for your agency may not be listed. Please detail the response under "Other". You may use as much space as necessary. 1. Transit agency name, contact person name, email, title, and telephone number. 2. Any special weather condition criteria or design requirement? For example, special concrete additives, switch heating units, reduced service, different seasonal track-to-earth resistances, etc. 3. What is the age of the system (Please define all systems and lines. Take as much room as needed)? a. Light rail b. Heavy rail Line 1, (name) ____ - ____ years Line 1, (name) ____ - ____ years Line 2, (name) ____ - ____ years Line 2, (name) ____ - ____ years Line 3, (name) ____ - ____ years c. Trolley / Commuter - ____ years d. Other ___________ - ____ years 4. What is the length of the total system (provide breakdown by system type)? a. Light rail miles ____ b. Heavy rail miles____ c. Trolley / Commuter ____ d. Other: ______________ - miles 5. What are the type, size and cross-section of the rail used? If sketches are available, please send along with this response. 6. Number of substations? Please breakdown by service line. 7. What is the average spacing of the substations? Please breakdown by each service line. 8. What is the largest spacing between two power stations?
Long Questionnaire 81 11. What guidelines and/or national/international standards were followed for the baseline survey? 12. What were the limiting values identified for track-to-earth resistance during the baseline survey? 13. What were the limiting values identified for track-to-earth resistance during subsequent maintenance tests? 14. What design measures were incorporated to mitigate stray current corrosion? 15. What other design measures/stray current provisions are incorporated to control stray current leakage? a. None, per se b. Ungrounded negative return circuit c. Diode grounded negative return circuit d. Insulated rail fasteners e. Structure stray current drainage f. Utility stray current drainage g. Electrically bonded reinforced concrete structures h. Yard traction power positive and negative distribution circuits normally electrically isolated from mainline i. Shop traction power positive and negative distribution circuits normally electrically isolated from yard j. Electrical segregation of mainline traction power (positive and or negative distribution circuits) k. Others _________________ 16. Is there a program for track maintenance? If yes, what is it? 17. Do you routinely perform stray current control testing/monitoring for operating portions of your rail system? a. No, not at all b. No, unless a stray current problem is suspected or reported c. Yes, typically on an annual basis d. Yes, typically every few years e. Yes (indicate typical frequency) â every ___ years 9. What is the spacing between the power stations and passenger stations, if any? 10. What tests were conducted in the baseline survey (pre-revenue service testing)? Which of those tests were recommended for future maintenance testing?
82 Stray Current Control of Direct Current-Powered Rail Transit Systems: A Guidebook 19. What is the track-to-earth resistance for the system currently? Please breakdown by service line if there is a difference. 20. Is track-to-earth resistance measured as part of the testing/maintenance plan? 21. Can stray current corrosion be differentiated from other corrosions to the metal structures for your system? a. No b. Yes 22. Have you encountered stray current corrosion-related problems on the system? If yes, how so? a. No b. Yes 23. Who is responsible (entity) for the stray current corrosion control, maintenance, testing and monitoring? a. We do not have a stray current control program, per se b. Engineering Department c. Electrical Maintenance Department d. Trackwork Maintenance Department e. Other: ______________ 24. Do neighboring utilities currently believe they are experiencing transit-caused stray current effects? a. Donât know b. No c. Yes, things are under control d. Yes, and they have reported problems that have not yet been addressed e. Other: ______________ f. Additional Comments: ______________ 25. When was the first stray current corrosion-related problem noticed? When was it repaired? 26. What measures were taken to control and/or remove the stray current corrosion issues? 27. How long have the repairs been on-going? 28. Is historical corrosion and repair data available? Can it be reviewed? 29. Is there a log of the maintenance conducted to address the stray current corrosion? 18. Do you have written procedures for your stray current control testing, monitoring and maintenance? If yes, please send a copy with this response. a. No b. Yes, general framework only c. Yes, including detailed procedures
Long Questionnaire 83 30. Is there a log of total cost of the corrosion repairs to-date? Can they be reviewed? 31. Currently, are there any stray current corrosion problems? 32. Have stray current corrosion issues caused you to modify your maintenance plan or stray current control methodology? Can the maintenance plan be reviewed? 33. Has the present stray current corrosion problem been repaired/fixed? 34. What was the total cost for the most recent stray current corrosion repair? 35. How many stray current corrosion repairs are typically made per year? 36. Has the frequency of stray current corrosion related problems decreased or increased with time? 37. How many route miles of light or heavy rail are currently under construction and or planned over the next few years? (Check all that apply and make additions, as needed) a. Donât know b. Nothing currently under construction c. Nothing planned over the next few years d. LRT miles e. HRT miles f. Trolley / Commuter __ g. Other: ____ miles 38. For in-progress transit construction and/or planned extensions over the next few years (if any), what stray current control provisions are expected and/or engaged? (Check all that apply and make additions, as needed) a. None, per se b. Donât know c. Ungrounded negative return circuit d. Structure stray current drainage e. Utility stray current drainage f. Electrically bonded reinforced concrete structures g. Other 1: ________________ h. Other 2: ________________ i. Other 3: ________________ 39. What is the latest total annual operating cost for the rail system? 40. What part of the total operating cost is for non-vehicle maintenance?
84 Stray Current Control of Direct Current-Powered Rail Transit Systems: A Guidebook 41. What is the estimated annual cost for stray current corrosion repairs excluding the consultant fee? 42. What do you estimate the repair costs due to stray current corrosion to be for the next 5 years? 43. What percentage of this cost will be the consultant fee? 44. Is there a certain budget to address the on-going stray current corrosion issues? 45. Is the transit system still in need of any repair/mitigation to control the stray current issues? 46. âLessons learnedâ from the stray current corrosion incidents and/or repairs? 47. What changes or modifications other than above lessons learned would you like to see or recommend to the industry? 48. Is there a local electrolysis committee to discuss stray current issues? 49. Do you participate in this local committee? 50. What stray current design specifications or manuals have been the most helpful in the past? Which ones have guided your design and maintenance methodology? 51. Do any Federal guidelines impact your design and maintenance approaches? Are there any that have a negative impact?
