13. NEW VIA AMENDMENT A00003 - RFI Responses.pdf

M6 ROAD SLIDE REPAIR - 127EAW26Q0006

NEW VIA AMENDMENT A00003

REQUEST FOR INFORMATION RESPONSES

Question 1A. What is the tie in method to native soil on each side of excavation base limits?

Response: The excavations extend beyond the apparent limits of slope movement. There is no “tie-in” method specified other than at the finish grade.

Question 1B. Will the slope be 2H-1V with geofab extending the length of the excavated area?

Response: If this refers to the GeoGrid, it covers the entire horizontal surface of each constructed back fill tier. If it refers to the constructed 2:1 slopes, other than erosion control materials, no design feature intends to place geotex (geofab) on any 2:1 slope

Question 2A. Will perf pipe be required the length of the excavated width?

Response: The perforated HDPE drain pipe extends the full length of the backwall (parallel to the road center line). Non-perforated double-walled drain pipe runs under the road approximately perpendicular the road centerline.

Question 2B. Drawings show perf pipe exiting at the midpoints of excavation base at S1, G2, and S2; will a T fitting be used in place of an elbow to provide full width drainage, i.e. what is the expected perf pipe drainage length per site?

Response: The drawings on sheets D4, D5, & D6 are apparently not rendering correctly. The lines showing the 6” double-wall drain pipe should be dashes indicating relative vertical alignment but not at the indicated location. Corrected drawings have been included. The double-walled HDPE drain pipes are located at the end(s) of the drain walls.

Question 3. What is the material type and expected quantity surrounding the perf pipe? What is the required coverage in vertical and horizontal directions?

Response: The amount of filter fabric required will depend on various factors as the structures are constructed.

The estimated maximum quantity is 2,000 SF of Type 2 fabric. See revised drawings

Question 4. What is the coating type required on WWM?

Response: At a minimum, mats must be fabricated from zinc coated (Commercial Galvanized) wire. See revised drawings.

Question 5. In the special project specifications section 157.04 it states, “thirty (30) days prior to the start of construction, submit a written plan according to subsection 104.03 with all necessary permits that provides permanent and temporary erosion control measures to minimize erosion and sedimentation during and after construction. What permits will be required?

Response: Required permits shall be obtained in accordance with all applicable State and County regulations in effect at the time of construction.

Question 6. Special project specifications section 301.05 ‘Compacting.” ( See PDF page 31-32 ), as well as, the schedule of items on drawings sheet G-2. Item 30102 is Aggregate Surfacing Grade : T. In section 301.05 the list of compaction methods A through E are given. What compaction method will be required?

Response: Compaction method B, will be added to the Schedule of Items. In section 30102.

Question 7. Special project specifications section 109 ( See PDF page 10 ). Subsection 109.08 is deleted. In standard specification ( FS-14) section 109.08 are progress payments. If progress payments are deleted, how is the contractor paid? Note, the solicitation has a period of performance of 180 calendar days.

Response: Progress payments are authorized. The contractor may submit partial invoices—limited to one per month—or a single final invoice upon project completion and successful final inspection.

Question 8. Special project specifications section 152-05 (d)(2) ( see PDF page 12 ). Slope staking is required.

Both method I and II state, “Use the template information shown in the plans or other Government-provided data to calculate the actual location of the catchpoint.” There is no template information shown on the plans.

Will there be Government-provided data to calculate the actual location of the catchpoint? Please confirm there will be control points for the project.

Response: The government staked station 0+00, G2,G3 and G1.

Question 9. Special project specifications section 240-11( see PDF page 22-23 ). There are 6 methods of compaction for earthwork. Placement method 1 through 6. Please confirm the required compaction method.

Response: It’s in the schedule of items 204 and its method 1 compaction.

Question 10. Revised drawing sheet D-5 per amendment 001. The note states, “The depth (perpendicular) to road cl of the base WWM reinforcement must be a minimum of 10’ and laid under the geogrid. The WWM cap (shown at tier 1 level) must also be a minimum of 10’ deep. The face of the WWM is designed for a 2’ height and must be buried no less than 18” into the slope/backfill.” Please confirm the WWM and cap will be placed at tier 1 level only? Also, the WWM and cap will be placed at station G2 only. Not S1 and S2.

Response: Correct only at station G2. Yes ,cap will be placed at tier 1 level only.

Question 11. Section 301 of the special project specifications. Subsection 301.03 states, “Develop and use Government furnished sources according to Section 105.” Please confirm the location of government furnished sources? Next, it states, “If the aggregate is produced and stockpiled before placement, handle and stockpile according to Section 314. “ Are we to assume we will have to produce, and stockpile the aggregate before placing it onsite?

Response: There are no government-furnished aggregate sources available for this contract.

Question 12. Section 703 of the special project specifications. There is a gradation for base aggregate. Do we follow that material gradation specification or use government provided aggregate base?

Response: There are no government-furnished aggregate material available for this contract.

Question 13. There are two given locations for construction water for the project. There is another source 5 miles North of the project site? Is this an acceptable source for water?

Response: There is on drafting site closer. 1.4 miles from the site. Lat and long 39.496303, -122.858842

Question 14. Section 201.06 of the special project specifications ( PDF page 17 ). There it states, “Dispose of merchantable timber designated for removal according to the provisions of the timber sale contract.” Please provide the provisions for the timber sale? There is only one tree that may be merchantable.

Response: F and J scattered tops and limbs and merchantable timber is decked at the disposal location.

Question 15. Section 109.02 of the special project specifications ( PDF page 11 ). There it states, “Contract quantities will be adjusted only when there are errors in the original design of 15% or more.” Bid item 20401 Roadway excavation and embankment, Compaction Method: 1 has a quantity of 5,220 CY. If there needs to be additional quantity for embankment ( i.e. the excavation is not sufficient for embankment) please identify that borrow source. GPF coordinates.

Response: If additional material is needed sources will be identified by government within ½ mile of site.

Question 16. Section 203.05 of the special project specifications ( PDF page 18 ). There, given; are the three methods of slash disposal methods. In the pre bid meeting the contracting officers representative (COR) indicated the location of the slash disposal area. That is, pile the slash near the intersection of forest service road ( FS ) 19N50 and M6. Please confirm that the contractor will not be required to windrow, scatter and /or chip slash from clearing operations and will stockpile slash.

Response: That disposal area for merchantable timber. Treat other smaller limbs or martial by Scattering and or chipping.

Question 17. Will the roads from Upper Lake and Elk Creek be cleared to the project site prior to the contract start date? Roadways need significant tree removal/trimming and load leveling in order for semi-trucks to access the construction site.

Response: The road from Upper Lake to Lake Pillsbury is a County-maintained road. From the airfield at Lake Pillsbury, a contract is currently in development to perform necessary road repairs. We are awaiting confirmation from our specialists before proceeding. Alternatively, our force account crew may be assigned to improve accessibility as needed.

Question 18. Drawing G-1 note 2 and 3 references to section H. Please provide section H or link to the file.

Response: A copy of M6_Road Repair_Sec-H will be attached. This document is now issued as part of Amendment A00003 – Special Contract Requirements.

Question 19. Please specify the aggregate type required to backfill the base WWM at section G-2.

Response: No aggregate base for backfill. Just the excavated native material.

Question 20. Will a permit be required to draw construction water from the designated areas on drawing G-1.

Response: No, but we will need to fallow BMP’s for drafting water .

Question 21. What are the insurance requirements for this project? Mention is made to amounts within the FAR Clause, but no amounts are provided.

Response: For this project, the contractor shall maintain insurance coverage in at least the minimum amounts required by the State of California for licensed construction contractors. This requirement includes, but is not limited to:

1. Workers’ Compensation Insurance in compliance with the California Labor Code.

2. Commercial General Liability Insurance meeting California’s minimum statutory and regulatory thresholds for licensed contractors.

3. Automobile Liability Insurance meeting California’s minimum requirements for vehicles used in the performance of construction work.

The contractor is responsible for ensuring that all required policies remain active for the duration of contract performance and that coverage meets or exceeds California’s minimum licensing and operational standards for construction contractors.

Question 22. Are there any special endorsements, if any?

Response: This question is unclear and no formal response can be provided.

Question 23. Are drivers for material deliveries / off haul to be paid under teamster rates? The provided table appears to indicate that that is the case. Please confirm if teamster rates apply to offsite services.

Response: Truck drivers hauling aggregate from an off-site quarry to the project stockpile are considered material delivery drivers and are not subject to Davis-Bacon prevailing wages, provided their time on the project site is limited to brief, incidental unloading. If the drivers perform any additional on-site construction-related tasks, haul materials from the project site away (e.g., removal of excess material or debris), or spend more than de minimis time on site, Davis-Bacon prevailing wages would apply.

Question 24. Can you provide intended dimensions of WWM? Sheets D-5 and D-7 are unclear on widths of lower and upper portions.

Response: The design details provided in the contract documents are based on the welded wire wall system developed by Hilfiker Retaining Walls. The contractor may submit an alternative system for review and approval by the Contracting Officer, provided that the proposed system meets or exceeds all specified performance requirements.

All steel welded-wire mesh utilized in the wall system shall be either commercially manufactured galvanized material or hot-dipped galvanized, in accordance with applicable specifications.