SPECIFICATIONS AND SPECIAL PROVISIONS
1. Overburden removal and finish contouring in excess of bid item 6 at Dried Meat Lake Pit #1 located in lands legally described as NW24-45-20-W4M will be incidental to the Services. There will be no compensation expected of the County.
2. For the purpose of this contract, Overburden removal shall include all excavation and placement of common material (including topsoil stripping and stockpiling, subsoil stripping and stockpiling, overburden stripping and stockpiling, haul road earthworks, and waste material movement).
There is an estimated 7,000m3 subsoil pile to be moved approximately 500m northwest as identified in drawing GC-01-2023 (Bid Item 6).
Below the subsoil pile and over the gravel extraction area #2 there is approximately 1100m3 of topsoil and 1600m3 of subsoil to be stockpiled east of the excavation as identified in drawing GC-01-2023 and is incidental to the crushing. There is also an unknown quantity of overburden below the subsoil that increases in depth as it goes to the east to be stockpiled. The site test holes as shown in Schedule “F” will be open for inspection during the pre-tender meeting and is meant to show the extent of these quantities as identified on Drawing Number GC-02-2023. All Overburden removal will be incidental to the Services. All soil stockpile sites (as required) have been identified on Drawing Number GC-01-2023. All soils stockpiles should be appropriately contoured to promote positive drainage away from the piles and allow for an accurate survey.
The Contractor shall take care in maintaining the separation of “Topsoil” and “Subsoil” as determined by the Manager of Public Works or his designate. Admixing will not be permitted and the occurrence of such will be subject to penalty as deemed appropriate by the Manager of Public Works or his designate.
It shall be the Contractor’s responsibility to ensure acceptance of the Overburden removal quantities required. All Overburden removal shall be as per the current Code of Practice for Pits.
3. Mobilization and demobilization shall be lump sum and if additional equipment is required to complete the contract to specification it shall be at the expense of the contractor. There will be no compensation expected of the County.
4. The Contractor shall:
4.1. Mine, crush, screen, measure and stockpile 30,000 cubic meters of 4:20 modified specification gravel at Dried Meat Lake Pit #1 at NW24-45-20-W4M (Measured in place) for the unit price as indicated on bid item 2.
4.2. Mine, crush, screen, measure and stockpile 30,000 cubic meters of 4:25 modified specification gravel at Dried Meat Lake Pit #1 at NW24-45-20-W4M (Measured in place) for the unit price as indicated on bid item 3.
4.3. Mine, crush, screen, measure and stockpile 10,000 cubic meters of 4:30 modified specification gravel at Dried Meat Lake Pit #1 at NW24-45-20-W4M (Measured in place) for the unit price as indicated on bid item 4.
4.4. Mine, crush, screen, measure and stockpile 10,000 cubic meters of 2:20 AT specification gravel at Dried Meat Lake Pit #1 at NW24-45-20-W4M (Measured in place) for the unit price as indicated on bid item 5.
4.5. Mine, crush, screen, measure and stockpile 3,000 cubic meters of 6:80 AT specification gravel at Dried Meat Lake Pit #1 at NW24-45-20-W4M (Measured in place) for the unit price as indicated on bid item 6 (Deletable).
4.6. Move 7,000 cubic meters of existing subsoil piles from excavation area #2 to subsoil pile location #1 as indicated on Drawing GC-01-2023 as indicated on bid item 7.
5. The Contractor shall:
5.1. Slope all embankments caused by excavations created while crushing gravel in the aforementioned gravel pits and prior to moving any equipment away from the pit. The said embankments shall be sloped at no less than 3:1 with overburden or excess screenings or as otherwise specified by the Manager of Public Works or his designate.
5.2. Remove all equipment within 30 days of completion of all earthworks and crushing from the county pit unless otherwise approved by the manager of public works or his designate.
6. The order of extraction of in-situ Pitrun will start with raw material excavation in area #1 followed by raw material excavation in area #2. The material in area #1 is better suited for the 2:20 material and shall be used primarily for the 2:20 aggregate produced. The order of extraction for the raw material excavation area #2 will be from west to the east limit and then progressing north after the material to the east is exhausted. This is referenced in the Gravel Extraction area #2 as illustrated in Drawing Number GC-02-2023. In-situ material will be transported by the Contractor to the crusher by whatever means deemed appropriate by the Contractor and as approved by the Manager of Public Works.
7. In all locations of gravel extraction, the intent is that the gravel resource shall be removed to a depth in which there is no remaining gravel resource underlying the final excavation elevation. In the event there are resources below the water table, it is understood the water table shall be the limit of excavation. It is required that a track hoe be utilized to properly exhaust gravel resources to the final pit elevation. County personnel will confirm acceptance that all gravel has been satisfactorily mined. Pockets of interburden removal shall be considered incidental to the Services.
8. It is the contractor’s responsibility to verify the quantities to his own satisfaction.
9. It shall be mandatory that stacking conveyors be utilized for the final stockpiling of all crushed gravel. The stacking conveyor shall automatically and continuously move from one side of the pile to the other during crushing operations. In the event that a stacking conveyor is not being used in this manner the manager of public works or his designate may shut down the gravel crushing operation until such time as the stacking conveyor is fully functional.
10. Aggregate shall be crushed and screened to the Following Specifications:
9.1 4:20 Modified Specification
Sieve Size – µm Percent Passing
20,000 100
10,000 35 - 77
5,000 15 - 55
1,250 0 - 28
80 0 - 10
Fractures - %
70+
9.2 4:25 Modified Specification
Sieve Size – µm Percent Passing
25,000 100
10,000 30 – 65
5,000 15– 45
1,250 0 – 27
80 0 – 10
Fractures - %
60+
9.3 4:30 Modified Specification
Sieve Size – µm Percent Passing
31,500 100
20,000 50 – 90
10,000 30 – 70
5,000 10– 45
1,250 0 – 26
80 0 – 10
Fractures - %
60+
9.4 2:20 Specification (Granular Base Course)
Sieve Size – µm Percent Passing
20,000 100
16,000 84 - 94
10,000 63 - 86
5,000 40 - 67
1,250 20 - 43
630 14 - 34
315 9 - 26
160 5 - 18
80 2 - 10
Fractures - %
60+
9.5 6:80 Modified Specification
Sieve Size – µm Percent Passing
80,000 100
50,000 55 - 100
25,000 38 - 85
16,000 32 - 70
5,000 20 - 55
315 6 - 30
80 2 - 10
Fractures - %
N/A
11. For crushed 4:20 and 2:20 aggregate a tolerance of three percent in the amount passing the maximum size sieve will be permitted provided all oversize material pass the next larger standard sieve size.
12. All stockpile sites will be surveyed prior to the placement of any crushed gravel. Upon completion of the gravel crushing, the actual volume will be calculated by surveying and plotting the produced gravel stockpile less the existing gravel stockpile site. The method of survey / data collection will be done by a Geographical Positioning System and/or Drone and the volume calculated by a 3D modeling program using TIN / Surface subtraction i.e.: Surface 1- Survey of stockpile site, Surface 2 – Survey of Stockpile after crushing on site.
13. The Contractor shall provide the county with the volume of aggregate crushed and soil moved for invoicing, and it will be verified by the county. In the event that the contractors’ volumes exceed that of the counties verified volume, the volume paid will be the lesser of the two volumes. The contractor may hire an independent professional Engineering Consultant to verify the stockpile volumes at their cost should they wish. In the event discrepancy regarding finished quantities arises, the stockpile volume used by the independent professional Engineering Consultant shall incorporate a pre-stockpile base or shall be deemed invalid.
14. The Contractor shall not level the top of the stockpile with equipment after crushing and as must use the stacking conveyor to ensure the top is reasonably level during crushing without exceeding the maximum height allowed.
15. All finished aggregate stockpiles shall be stacked between 9.14m (30’) minimum height and a maximum height of 10.98 meters (36’).
16. The County reserves the right to increase or decrease the volume crushed at Dried Meat Lake Pit #1 located at NW24-45-20-W4M at its sole discretion without explanation.
17. The Contractor shall crush all rock with a diameter of 200 mm. (8”) or less.
18. The Contractor shall separate all rock in excess of 200 mm. (8”) to produce clean rip rap and stockpile the material at the location identified in drawing GC-01-2023 or designated by the Manager of Public Works or his designate. The County reserves the right to limit the amount of rip rap being produced and direct the Contractor to crush the balance of the oversize to the contract specification.
19. Aggregate produced shall comply fully with the specifications, and the Contractor shall recognize and satisfy himself as to the type and amount of work that may be necessary to produce the material required.
20. The Contractor shall adjust and modify aggregates as required in order to meet specification requirements, including but not limited to, splitting of aggregate, and/or rejection of fine aggregate.
21. Gravel shall be stockpiled at the site shown on Drawing Number GC-01-2023. The location of the stockpile or stockpiles can be changed at any time by the Manager of Public Works or his designate giving the Contractor one day written notice of change of location, but no such new stockpile shall be located at a distance more than 500 meters from the excavation area.
22. The mining, crushing, screening, stockpiling and cleanup of the said quantities of gravel shall be completed in full by 12:01PM October 27, 2023. All material crushed and stockpiled after this date will incur a penalty of $1.50/m3.
23. All areas in which the Contractor will have operated during the project shall be fully levelled and left in a neat and tidy manner. This would include, but not be limited to: areas of gravel extraction, haul routes, traveled areas, and crusher laydown and operation site.
24. The gravel may be loaded directly from the crusher onto the trucks utilized by the County should it be required. Quantities will be based on legal tare in conjunction with an average density rate as determined by a third-party testing agency. Moisture content in this regard will be based on an overall project average.
25. The Contractor shall employ and keep on the job sites at all times that work is in progress under this contract, a competent person or persons who shall give efficient supervision to the crushing and stockpiling operation, and who will be able to receive and act upon directions, instructions, and notices which may be given by the County.
26. All directions, instructions, and notices on behalf of the County shall be given to the Contractor or his supervisor in writing by the Manager of Public Works, or in his absence, any other authorized person on his behalf.
27. The Contractor shall keep a daily record of the gravel crushed, screened and stockpiled. The said daily record is subject to the approval of the Manager of Public Works his designate or an appointed checker. The Manager of Public Works and designate shall at all times have access to the records of the Contractor, and shall have a reasonable time at the commencement of each working day to inspect, test, balance or do any other thing necessary to ensure the accurate measurement and specifications of the gravel crushed.
28. The Manager of Public Works or any other authorized person acting on his behalf shall at all times have access to the crushing, and stockpiling operation, and may give any instructions or directions he deems necessary to protect the property of the County or of others on or near the gravel pits, and such instructions or directions shall be binding on the Contractor. The County may inspect the crushing and stockpiling operation at any time and may cause such testing of the crush as is necessary. The Contractor shall rectify, at his own expense, his operation if in the opinion of the County the crush produced does not meet the requirements.
29. The Contractor will at all times pay, and be responsible for all losses, claims, demands, actions, suits, costs, expenses and damages which may be incurred by or by reason of any action or other proceeding which shall or may be brought or instituted in respect of injury to persons or damages to property on or near any of the said gravel pits or stockpiles arising out of the excavation for, crushing and stockpiling of gravel by the Contractor, directly or indirectly, and the Contractor shall at all times hereafter save harmless and keep indemnified the County from and against all such losses, claims, demands, actions, suits, costs, expenses and damages.
30. The Contractor shall be responsible for the care and protection of all material, and equipment on the job sites, and all damage to the said material and equipment, howsoever caused, shall be made good at the expense of the Contractor.
31. Acceptance of processed aggregates shall take place when such aggregates are in their final position and have met all the requirements of the Contract. Final position for a crushing and stockpiling contract will be the stockpile.
32. The Contractor shall license all vehicles and equipment in accordance with the laws of the Province of Alberta.
33. The Contractor shall dispose of all waste materials produced by or incidental to the crushing and stockpiling operation as directed by the Manager of Public Works or his designate. Upon completion of the crushing, the site is to be inspected by a representative of the Contractor and the Manager of Public Works or his designate to ensure the work site is left in a condition satisfactory to the County.
34. The Contractor will give the County at least two (2) days’ notice of his intention to move the crushing operation from any location, and simultaneously the County will be informed of the location where the crushing operation will resume.
35. The Contractor is responsible for the overall safety of their workers. The Contractor is responsible to comply with applicable Environmental, Health, and Safety Legislation as applicable in the Province of Alberta.
36. The Contractor shall prepare and implement an Environmental Construction Operations Plan in accordance with the Department manual entitled “Environmental Construction Operations Plan (ECO Plan) Framework” dated Sept. 2008 version. The plan must be submitted and approved by the County prior to the Contractor moving into the pit.
37. Should this Tender be accepted, the undersigned agrees to enter into a written agreement with the County for the faithful performance of the Services covered by this Tender.
38. The hours of operation permitted for the crushing portion of the Services shall be determined by the option accepted by the county.
38.1. Option A: would be 6 days per week (Monday thru Saturday) and hours of operation permitted between 6:00 AM and 11:00 PM.
38.2. Option B: 7 days per week (Monday thru Sunday) and hours of operation permitted 24hours per day 7 days per week.
39. The Contractor shall provide safe and convenient means for accurately and representatively sampling each aggregate stream being produced during all screening, splitting and crushing processes.
40. Crushing operations shall be controlled to prevent segregation of the various particle sizes. The stacking conveyor used to stockpile the final product should not have a discharge point of more than 2.0 meters above the stockpile.
41. The Contractor shall dispose of all reject material by piling it adjacent to the existing reject stockpile as identified on Drawing Number GC-01-2023. Reject material may also be used for back sloping in excavations at the approval of the Manager of Public Works or his designate.
42. To accommodate fuel cost changes over the course of this agreement, for each $0.05/l of price increase for #2 dyed diesel there will be a premium of $0.05/m3 for produced aggregate. For every $0.05/l of price decrease there will be a credit to the County of $0.05/m3. The unit price fuel adjustment will be based on the average #2 dyed diesel fuel price (including GST) on the date of tender closing less the average #2 dyed diesel fuel price (including GST) from the start of crushing to the crushing completion date. If the crusher is not crushing for a period of 5days or longer that period will be excluded from the average fuel price. The price of fuel will be determined by using an average of the #2 dyed diesel County rate from Petro Canada bulk station (Drever’s Agencies) and the UFA bulk station in Camrose, Alberta. The premium or credit will be adjusted on the final progress payment and applied to all aggregate produced.
43. A pre-Tender meeting will be held April 5, 2023 at 10:00 a.m. at Dried Meat Lake Pit #1. Attendance to this meeting is MANDATORY for prospective bidders. Attendance will be taken, and failure to attend this meeting will be cause for the rejection of a tender.
