Question_Responses.pdf
PDF 89 KB Posted
- Attached to
- Avian Array Line Repair - John Day Dam Federal contract opportunity
- Solicitation number
- W9127N-17-R-0007
About this file
Question Responses 01-04
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Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| A.07.24_Amendment_03_SF30.pdf | ||
| Attachment_D_-Rev_01_05_Dec_Vectran_Factory_Cut_Length_Material_Properties.pdf | ||
| A.07.24_Amendment_04_SF30.pdf | ||
| JDD1.109_S500XXX.pdf | ||
| A.07.24_W9127N-17-R-0007_Am_0002_Avian_Array_Rope_Replacement.pdf | ||
| A.07.24_Amendment_01_SF30.pdf | ||
| A.07.24_Revised_S-500_JDD1.109_G500XXX.pdf | ||
| Attachment_B_CDR_dd2772.pdf | ||
| Attachment_C_-_BRZ.pdf | ||
| Attachment_A_-_Drawing_Packet.pdf | ||
| A.07.23_W9127N-17-R-0007_Avian_Array_Rope_Replacement_RFP.pdf | ||
| Attachment_D_-_Vectran_12_Strand_Factory_Cut_Length_per_Line.pdf | ||
| Appendix_E_-_Reference_As-Builts.pdf | ||
| A.01.23_JDD1_109_G100XXX_Draft.pdf | ||
| A.01.28_PWS_John_Day_Avian_Array_Improvements_Phase_I_Draft_02.pdf |
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Text version
1.) What is the elevation (above MSL) at which the 3/16" Vectran (Cortland cable) ropes are terminated at on the South shore of the Columbia river?
ANSWER: Elevations vary per tower. For the South Shore, anchor points have an elevation between 229.15’ and 230.42’ MSL. Elevation of anchor points per tower will be provided in the solicitation.
2.) What is the different elevations (above MSL) at which the 3/16" Vectran (Cortland cable) ropes are terminated at on the North side of the Columbia river along the Navigation Lock wall and over the spillways?
ANSWER: Elevations vary per tower and section. For the Peninsula towers (lines 10‐12) the elevation is 265’ MSL. For the spillway towers, the anchor point is at 304’ MSL. Details of anchor point elevation per section will be provided in the solicitation.
3.) Has the USACE's checked or measured the tension on the existing 3/16" Vectran ropes across the Columbia river?
ANSWER: Periodic maintenance does not check for tension in existing lines.
1.) 3/16" Vectran rope failures
A.) Did all fifteen (15) Avian Array ropes fail?
ANSWER: Yes
B.) Did they all fail at the same time or at different times, over several months or over one (1) to six
(6) years? During the Spring, Summer, Fall or Winter months?
ANSWER: Since original 2010 installation, the majority of lines were lost in the past two years. A trend seems to occur during the summer where 7 were lost in 2015 and 10 were lost in 2016.
C.) What caused the failures?
ANSWER: Exact cause is unknown.
D.) Did they fail in the middle of their spans over the Columbia river?
ANSWER: All lines failed within a couple feet of the anchor point.
E.) Did they fail at their termination points on either the North side along the lock wall, over the spillway gates OR on the South side along the Oregon shore line?
ANSWER: Lines have failed at their termination points for both the North side and the South side.
2.) Concerning the manufacturer being Cortland cable.
A.) Is the 3/16" Vectran rope their commercial fishing lines, utility line or what?
ANSWER: Vectran Cable is a synthetic cable constructed of LCP (Liquid Crystal Polymer). The manufacturer specifically recommends this cable applications where low stretch and creep are required.
For further detail and application of rope, please consult Cortland Cable Co.
B.) Is each of the fifteen (15), 3/16" Vectran ropes on a separate spool or drum?
ANSWER: Unknown
How big are the spools OR drums?
ANSWER: Unknown
Has there any terminations been already done to the ends of the ropes that are to be furnished by the USACE's and installed by the contractor?
ANSWER: The government furnished rope will be provided to the contractor unspliced. The contractor shall cut and splice the rope to meet the PWS requirements.
3.) Is there any problem with the new ropes that are to be furnished by the USACE's getting wet in getting them across from the south shore of the Columbia river to either the lock wall or to the their anchor points over the spillway gates?
ANSWER: No.
4.) What is the length of rope numbers 9, 42, 55, 62, 69 and 75? These are the ropes I would take out in order to pull in Group No's. ‐ Group "A" ‐ 9, 10, 11, 12; Group "B" ‐ 39, 42, 45; Group "C" ‐ 54, 55, 56; Group "D" ‐ 59, 60, 61, 62, 63; Group "E" ‐ 68, 69, 70; Group "F" ‐ 73, 75, 77.
ANSWER: Horizontal spans and factory cut lengths of line will be provided in the solicitation.
File details come from the government source that posted it. Updated .