Construction_Specifications.pdf

Dog Tooth Bend EWP Alexander County, IL.

INDEX OF CONSTRUCTION SPECIFICATIONS

4 Channel Clearing

8 Mobilization and Demobilization

21 Excavation

INDEX OF MATERIAL SPECIFICATIONS

None

USDA-NRCS Dog Tooth Bend EWP Illinois 4-1 Alexander County, IL July 2016

Construction Specification 4—Channel Clearing and Shaping

1. Scope The work consists of clearing designated areas by the removal and disposal of trees, logs, stumps, shrubs, brush, and rubbish, and the shaping of the channel.

2. Protection of existing vegetation Trees and other vegetation designated to remain undisturbed shall be protected from damage throughout the duration of the construction period. Any damages resulting from the contractor's operations or neglect shall be repaired by the contractor.

Earthfill, stockpiling of materials, vehicle or equipment parking, and excessive foot or vehicle traffic shall not be allowed within the drip line of vegetation designated to remain in place.

Vegetation damaged by any of these or similar actions shall be replaced with viable vegetation of the same species, similar condition, and like size unless otherwise approved by the contracting officer.

Any cuts, skins, scrapes, or bruises to the bark of the vegetation shall be carefully trimmed and local nursery accepted procedures used to seal damaged bark.

Any limbs or branches 0.5 inch or larger in diameter that are broken, severed, or otherwise seriously damaged during construction shall be cut off at the base of the damaged limb or branch flush with the adjacent limb or tree trunk.

All roots 1 inch or larger in diameter that are cut, broken, or otherwise severed during channel shaping shall have the end smoothly cut perpendicular to the root. Roots exposed during channel shaping operations shall be covered with moist soil as soon as possible to prevent roots from drying out.

3. Marking The limits of the area(s) to be cleared and shaped are marked by stakes, flags, paint, tree markings, or other suitable methods or as specified in section 8 of this specification, or they will be shown on the drawings. Trees to remain standing, undisturbed, and uninjured are designated by special markings.

4. Clearing Trees and other vegetation marked for clearing shall be cut off as near the ground surface as conventional tools and equipment normally permit. All trees not marked for preservation and all snags, logs, brush, shrubs, stumps, and rubbish shall be cleared from within the area limits identified.

5. Disposal All woody material, vegetation, and rubbish resulting from clearing from designated areas shall be disposed of at the locations and in a manner shown on the drawings, or as specified in section 8 of this specification.

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6. Shaping The channel bottom and side slopes shall be shaped as shown on the drawings. The resulting shaped channel surface shall be reasonably smooth. Material excavated during the channel shaping operation shall be removed from the channel and disposed of as specified in section 8 of this specification.

7. Measurement and payment Method 1—For items of work for which specific unit prices are established by the contract, the designated cleared and shaped area is measured and the area determined to the nearest 0.1 acre.

Payment for clearing and shaping is made at the contract unit price for the item and shall constitute full compensation for all labor, equipment, tools, applicable permits and associated fees for burning and disposal of refuse, and all other items necessary and incidental to the satisfactory completion of the work.

Method 2—For items of work for which specific unit prices are established by the contract, the length of the cleared and shaped channel designated is measured to the nearest 100 feet. Payment for clearing and shaping is made at the contract unit price for the item and shall constitute full compensation for all labor, equipment, tools, applicable permits and associated fees for burning and disposal of refuse, and all other items necessary and incidental to the satisfactory performance of the work.

Method 3—For items of work for which specific unit prices are established by the contract, the cleared and shaped area(s) is measured and the area determined to the nearest 0.1 acre. The designated cleared and shaped area(s) is determined from the measured width at representative sections and the distance between the sections. Payment for clearing and shaping is made at the contract unit price for the item and shall constitute full compensation for all labor, equipment, tools, applicable permits and associated fees for burning and disposal of refuse, and all other items necessary and incidental to the satisfactory completion of the work.

Method 4—For items of work for which specific lump sum prices are established by the contract, the extent of clearing and shaping is not measured or determined for payment. Payment for clearing and shaping is made at the contract lump sum price for the item and shall constitute full compensation for all labor, equipment, tools, applicable permits and associated fees for burning and disposal of refuse, and all other items necessary and incidental to the satisfactory completion of the work.

All Methods—The following provisions apply to all methods of measurement and payment.

Compensation for any item of work described in the contract, but not listed in the bid schedule is included in the payment for the item of work to which it is made subsidiary. Such items and items to which they have been made subsidiary are identified in section 8 of this specification.

8. Items of work and construction details Items of work to be performed in conformance with this specification and the construction details thereof are:

A. Bid Item 2, Channel Clearing – Reach A

(1) This item shall consist of the removal and stacking of all debris, woody vegetation, and trees and root wads from the channel cross-section reach A from Station 0+00 to

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Station 28+30 as shown on the drawings.

(2) All material removed from the channel cross-section shall be stacked in piles a minimum distance of 50 feet from the channel bank. Piles shall not be placed closer than 300 feet of each other.

(3) Burning of the piles is not required. Material only needs to be stacked in preparation for burning.

(4) Channel clearing shall be performed from the west side of channel only, as shown on the drawings.

(5) No channel shaping or excavation is required.

(6) Measurement and payment shall be by Method 2, Section 7 as shown above.

B. Subsidiary Item, Incidental Clearing

(1) This item shall consist of any necessary minor clearing or debris removal required to complete Bid Item 3- Excavation in the reaches below:

• Reach C Main, Station 25+00 to 55+35

• Reach D Main, Station 0+00 to 25+00

• Reach D Main, Station 57+00 to 85+91

• Reach D4 Lateral, Station 0+00 to 6+08

(2) All material removed from the channel cross-section shall be stacked, within the work area limits, in piles a minimum distance of 20 feet from the channel bank. Piles shall not be placed closer than 300 feet of each other.

(3) Burning of the piles is not required. Material only needs to be stacked in preparation for burning.

(4) No separate compensation shall be made for this item. All compensation for labor, tools, equipment and other items necessary to perform the work, shall be included in Bid Item 3-Excavation for each individual reach.

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Construction Specification 8—Mobilization and Demobilization

The work consists of the mobilization and demobilization of the contractor's forces and equipment necessary for performing the work required under the contract. It does not include mobilization and demobilization for specific items of work for which payment is provided elsewhere in the contract. Mobilization will not be considered as work in fulfilling the contract requirements for commencement of work.

2. Equipment and material Mobilization shall include all activities and associated costs for transportation of contractor's personnel, equipment, and operating supplies to the site; establishment of offices, buildings, and other necessary general facilities for the contractor's operations at the site; premiums paid for performance and payment bonds including coinsurance and reinsurance agreements as applicable; and other items specified in section 4 of this specification.

Demobilization shall include all activities and costs for transportation of personnel, equipment, and supplies not required or included in the contract from the site; including the disassembly, removal, and site cleanup of offices, buildings, and other facilities assembled on the site specifically for this contract.

This work includes mobilization and demobilization required by the contract at the time of award. If additional mobilization and demobilization activities and costs are required during the performance of the contract as a result of changed, deleted, or added items of work for which the contractor is entitled to an adjustment in contract price, compensation for such costs will be included in the price adjustment for the item or items of work changed or added.

3. Payment Payment will be made as the work proceeds, after presentation of paid invoices or documentation of direct costs by the contractor showing specific mobilization and demobilization costs and supporting evidence of the charges of suppliers, subcontractors, and others. When the total of such payments is less than the lump sum contract price, the balance remaining will be included in the final contract payment. Payment of the lump sum contract price for mobilization and demobilization will constitute full compensation for completion of the work.

Payment will not be made under this item for the purchase costs of materials having a residual value, the purchase costs of materials to be incorporated in the project, or the purchase costs of operating supplies.

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4. Items of work and construction details Items of work to be performed in conformance with this specification and the construction details thereof are:

A. Bid Item 1, Mobilization and Demobilization

(1) This item shall consist of the mobilization and demobilization of the contractor's forces and equipment as well as all permitting, bonding and insurance requirements necessary to perform the work required under this contract.

(2) Access to the site shall be as shown on the drawings. During all operations, it will be the contractor’s responsibility to keep all public roads open except as approved by Alexander County Highway Engineer. Work shall only be performed within the work area limits as shown on the drawings. Crop damage within the work area limits shall be kept to a minimum as required to perform the work.

(3) All earthmoving equipment utilized for the work shall meet the requirements of

OSHA, Paragraph 1926.602. In addition, roll-over protection and safety belts shall be installed, maintained, and utilized regardless of the equipment age or struck capacity.

This includes earthmoving equipment as mentioned in Part 1926, Subpart 0, Sections

1926.602 and Subpart W, Sections 1000, 1001, and 1002, to include skid-steer and self-propelled compactor equipment.

(4) Prior to commencement of construction, the contractor is responsible for contacting

John Grab, COR, at 618-791-1436 a minimum of 48 hours before operations on-site begin.

(5) All invoices submitted by the contractor shall be subject to the approval of the

Contracting Officer.

(6) The contractor shall perform the work in such a manner as to control erosion and minimize the production of sediments and other pollutants to the water and air during construction operations.

(7) The contractor should take all precautions necessary to protect existing utilities, including proper notification of the Illinois 1-call system.

(8) Payment for Bid Item 1, Mobilization and Demobilization shall be lump sum. Such payment shall constitute full compensation for all labor, equipment, materials, tools and other items necessary to complete the work.

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Construction Specification 21—Excavation

The work shall consist of the excavation required by the drawings and specifications and disposal of the excavated materials.

2. Classification Excavation is classified as common excavation, rock excavation, or unclassified excavation in accordance with the following definitions.

Common excavation is defined as the excavation of all materials that can be excavated, transported, and unloaded using heavy ripping equipment and wheel tractor-scrapers with pusher tractors or that can be excavated and dumped into place or loaded onto hauling equipment by excavators having a rated capacity of one cubic yard or larger and equipped with attachments (shovel, bucket, backhoe, dragline, or clam shell) appropriate to the material type, character, and nature of the materials.

Rock excavation is defined as the excavation of all hard, compacted, or cemented materials that require blasting or the use of ripping and excavating equipment larger than defined for common excavation. The excavation and removal of isolated boulders or rock fragments larger than 1 cubic yard encountered in materials otherwise conforming to the definition of common excavation shall be classified as rock excavation. The presence of isolated boulders or rock fragments larger than 1 cubic yard is not in itself sufficient cause to change the classification of the surrounding material.

For the purpose of these classifications, the following definitions shall apply:

Heavy ripping equipment is a rear-mounted, heavy duty, single-tooth, ripping attachment mounted on a track type tractor having a power rating of at least 250 flywheel horsepower unless otherwise specified in section 10.

Wheel tractor-scraper is a self-loading (not elevating) and unloading scraper having a struck bowl capacity of at least 12 cubic yards.

Pusher tractor is a track type tractor having a power rating of at least 250 flywheel horsepower equipped with appropriate attachments.

Unclassified excavation is defined as the excavation of all materials encountered, including rock materials, regardless of their nature or the manner in which they are removed.

3. Blasting The transportation, handling, storage, and use of dynamite and other explosives shall be directed and supervised by a person(s) of proven experience and ability who is authorized and qualified to conduct blasting operations.

Blasting shall be done in a manner as to prevent damage to the work or unnecessary fracturing of

Illinois 21-2 Alexander County, IL the underlying rock materials and shall conform to any special requirements in section 10 of this specification. When specified in section 10, the contractor shall furnish the engineer, in writing, a blasting plan before blasting operations begin.

4. Use of excavated material Method 1—To the extent they are needed, all suitable material from the specified excavations shall be used in the construction of required permanent earthfill or rockfill. The suitability of material for specific purposes is determined by the engineer. The contractor shall not waste or otherwise dispose of suitable excavated material.

Method 2—Suitable material from the specified excavations may be used in the construction of required earthfill or rockfill. The suitability of material for specific purposes is determined by the engineer.

5. Disposal of waste materials Method 1—All surplus or unsuitable excavated materials are designated as waste and shall be disposed of at the locations shown on the drawings.

Method 2—All surplus or unsuitable excavated materials are designated as waste and shall be disposed of by the contractor at sites of his own choosing away from the site of the work. The disposal shall be in an environmentally acceptable manner that does not violate local rules and regulations.

6. Excavation limits Excavations shall comply with OSHA Construction Industry Standards (29CFR Part 1926) Subpart P, Excavations, Trenching, and Shoring. All excavations shall be completed and maintained in a safe and stable condition throughout the total construction phase. Structure and trench excavations shall be completed to the specified elevations and to the length and width required to safely install, adjust, and remove any forms, bracing, or supports necessary for the installation of the work. Excavations outside the lines and limits shown on the drawings or specified herein required to meet safety requirements shall be the responsibility of the contractor in constructing and maintaining a safe and stable excavation.

7. Borrow excavation When the quantities of suitable material obtained from specified excavations are insufficient to construct the specified earthfills and earth backfills, additional material shall be obtained from the designated borrow areas. The extent and depth of borrow pits within the limits of the designated borrow areas shall be as specified in section 10 or as approved by the engineer.

Borrow pits shall be excavated and finally dressed to blend with the existing topography and sloped to prevent ponding and to provide drainage.

8. Overexcavation Excavation in rock beyond the specified lines and grades shall be corrected by filling the resulting voids with portland cement concrete made of materials and mix proportions approved by the engineer. Concrete that will be exposed to the atmosphere when construction is completed shall meet the requirements of concrete selected for use under Construction Specification 31, Concrete for Major Structures, or 32, Structure Concrete, as appropriate.

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Concrete that will be permanently covered shall contain not less than five bags of cement per cubic yard. The concrete shall be placed and cured as specified by the engineer.

Excavation in earth beyond the specified lines and grades shall be corrected by filling the resulting voids with approved, compacted earthfill. The exception to this is that if the earth is to become the subgrade for riprap, rockfill, sand or gravel bedding, or drainfill, the voids may be filled with material conforming to the specifications for the riprap, rockfill, bedding, or drainfill.

Before correcting an overexcavation condition, the contractor shall review the planned corrective action with the engineer and obtain approval of the corrective measures.

9. Measurement and payment For items of work for which specific unit prices are established in the contract, the volume of each type and class of excavation within the specified pay limits is measured and computed to the nearest cubic yard by the method of average cross-sectional end areas or by methods outlined in section 10 of this specification. Regardless of quantities excavated, the measurement for payment is made to the specified pay limits except that excavation outside the specified lines and grades directed by the engineer to remove unsuitable material is included. Excavation required because unsuitable conditions result from the contractor's improper construction operations, as determined by the engineer, is not included for measurement and payment.

Method 1—The pay limits shall be as designated on the drawings.

Method 2—The pay limits shall be defined as follows:

a. The upper limit shall be the original ground surface as it existed before the start of construction operations except that where excavation is performed within areas designated for previous excavation or earthfill, the upper limit shall be the modified ground surface resulting from the specified previous excavation or earthfill.

b. The lower and lateral limits shall be the neat lines and grades shown on the drawings.

Method 3—The pay limits shall be defined as follows:

a. The upper limit shall be the original ground surface as it existed before the start of construction operations except that where excavation is performed within areas designated for previous excavation or earthfill, the upper limit shall be the modified ground surface resulting from the specified previous excavation or earthfill.

b. The lower and lateral limits shall be the true surface of the completed excavation as directed by the engineer.

Method 4—The pay limits shall be defined as follows:

a. The upper limit shall be the original ground surface as it existed before the start of construction operations except that where excavation is performed within areas designated for previous excavation or earthfill, the upper limit shall be the modified ground surface resulting from the specified previous excavation or earthfill.

b. The lower limit shall be at the bottom surface of the proposed structure.

c. The lateral limits shall be 18 inches outside of the outside surface of the proposed structure or shall be vertical planes 18 inches outside of and parallel to the footings, whichever gives the larger pay quantity, except as provided in d below.

d. For trapezoidal channel linings or similar structures that are to be supported upon the sides

Illinois 21-4 Alexander County, IL of the excavation without intervening forms, the lateral limits shall be at the underside of the proposed lining or structure.

e. For the purposes of the definitions in b, c, and d, above, any specified bedding or drainfill directly beneath or beside the structure will be considered to be a part of the structure.

All methods—The following provisions apply to all methods of measurement and payment.

Payment for each type and class of excavation is made at the contract unit price for that type and class of excavation. Such payment will constitute full compensation for all labor, materials, equipment, and all other items necessary and incidental to the performance of the work except that extra payment for backfilling overexcavation will be made in accordance with the following provisions.

Payment for backfilling overexcavation, as specified in section 8 of this specification, is made only if the excavation outside specified lines and grades is directed by the engineer to remove unsuitable material and if the unsuitable condition is not a result of the contractor's improper construction operations as determined by the engineer.

Compensation for any item of work described in the contract, but not listed in the bid schedule is included in the payment for the item of work to which it is made subsidiary. Such items and the items to which they are made subsidiary are identified in section 10 of this specification.

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10. Items of work and construction details

A. Bid Item #3 – Excavation Items, a. – h.

(1) Bid Item #3 shall consist of excavation and placing spoil in the designated spoil areas in order to clean out the existing channels to the lines, grades and cross-sections shown on the drawings. Measurement and payment for Bid Item #3 are as shown below.

(2) The disposal of excavated material will be by Method 1. All excavated material shall be placed in a linear spoil pile a minimum of 12 feet from the top of excavated channel to the work area limits as shown on the drawings. Finished spoil piles shall be 6 feet or less in height. Spreading of the spoil is not required.

(3) Reaches with one sided access, as shown on the drawing, shall have spoil placed on the same side as the access only.

(4) Contractor shall leave breaks in the spoil as needed to allow all lateral surface drainage flows to enter the channel.

(5) All excavation in this contract is anticipated to meet the definition of common excavation as described in Section 2 of this specification.

(6) The Contractor shall take great care to not overexcavate beyond the specified maximum depth in the excavation areas.

(7) The estimated cubic yards of excavation for Excavation Items a. – h. are shown on the drawings.

(8) Paragraph 9 above shall be modified as follows. Measurement and payment for Bid Item #3 – Excavation Items, a. – h. shall be by linear feet. This payment shall constitute full compensation for all labor, equipment, tools and other incidental items required to perform the work in this bid item.

B. Bid Item #4 – Culvert Cleaning

(1) Bid Item #4 shall consist of excavation and removal of all sand and sediments from the interior of culverts at road crossings designated on the drawings in order to restore full and open flow through the culverts.

(2) A table of culvert sizes, lengths and locations are provided in the drawings.

(3) No road closings are allowed unless coordinated with the Alexander County Highway Engineer.

(4) The disposal of excavated material will be by Method 1. All excavated material shall be placed in a linear spoil pile a minimum of 12 feet from the top of excavated channel to the work area limits as shown on the drawings. Finished spoil piles shall be 6 feet or less in height. Spreading of the spoil is not required. No excavated material shall be placed

Illinois 21-6 Alexander County, IL on the road surface.