Revised_pages_from_Aspring_Corrected_Final_Design_Construction_Specifications.pdf

NRCS Aspring Wetland Restoration Project 7-5 August 2016 Hendry County, FL modification area. Also include top width information for all dikes, the road modification, and concrete weir.

II. The maximum distance between cross sections for dikes, land smoothings, borrow areas, and the proposed channel shall be 100 feet. Individual shot elevations within each cross-section shall be taken at every change in topographical slope, or every 20 feet, whichever is shorter.

III. All drawings shall be submitted on CD in PDF and DWG format, four (4) signed sealed hard copies, 24 inch by 36 inch plan size, shall be provided to the Engineer.

The as-builts shall be overlaid on the design plan sheets.

(6) In section 8 of this specification, Payment, Method 2 will apply.

END OF SECTION

NRCS Aspring Wetland Restoration Project 21-4 August 2016

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 9 of this specification.

9. Items of work and construction details

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

a. Bid Item No. 17, Channel (CH1)

(1) This item shall consist of excavating the proposed channel to the neat lines and grades as shown on the construction drawings.

(2) Payment for Channel (CH1) as detailed on the Contract Documents will be made per each once the Engineer has approved the completion.

b. Subsidiary Item, Excavation, Common, Borrow

(1) This item shall consist of all required common excavation to obtain suitable earthfill material for constructing the ditch blocks, structure removal, dikes, concrete pipes, road modification, and concrete overflow weir as shown on the construction drawings.

(2) The earthfill borrow material will be excavated from within the WRP site at the locations shown on the drawings. This item shall include the hauling from the onsite borrow areas and berm modifications to the fill areas, shown on the engineering plans.

No other borrow areas shall be excavated without prior approval of the Engineer. No off-site disposal is anticipated unless unsuitable material is found.

(3) Edges of the borrow areas shall be graded to blend with the existing topography and graded as shown on the drawings.

(4) After the completion of excavation activities, the disturbed areas shall be smoothed and stabilized by seeding and mulching.

(5) All rocks larger than 6 inches in diameter must be stockpiled and removed from the site.

(6) The project is designed not to have excess material. The Contractor is to minimize over-excavation by limiting the depth of the borrow excavation.

(7) No separate payment shall be made for this item. Compensation shall be included for the respective bid item to which it is subsidiary:

Bid Item No. 7, Earthfill, Dike Construction Bid Item No. 8, Earthfill, Ditch Blocks Bid Item No. 9, Structure for Water Control (SWC1) Bid Item No. 10, Structure for Water Control (SWC2) Bid Item No. 11, Structure for Water Control (SWC3) Bid Item No. 13, Structure for Water Control (SWC5) Bid Item No. 15, Structural Removal

NRCS Aspring Wetland Restoration Project 21-5 August 2016

Bid Item No. 16, Road Modification (RM1) Bid Item No. 18, Berm Modification (BM1)

c. Subsidiary Item, Excavation, Common, Structural

(1) This item shall consist of all common excavation necessary and incidental to constructing the concrete pipes, concrete overflow weir and installing the riprap as shown on the construction drawings.

(2) All rocks larger than 6 inches in diameter must be stockpiled and removed from the site.

(3) No separate payment shall be made for this item. Compensation shall be included for the respective bid item to which it is subsidiary:

Bid Item No. 9, Structure for Water Control (SWC1) Bid Item No. 10, Structure for Water Control (SWC2) Bid Item No. 11, Structure for Water Control (SWC3)

d. Subsidiary Item, Excavation, Common, Foundation Stripping

(1) This item shall consist of all excavation necessary and incidental to stripping the foundation for the ditch blocks, rock riprap, structure removal, dikes, concrete pipes, concrete overflow weir, land smoothing and borrow areas as shown on the construction drawings.

(2) Suitable material stripped shall be used as topsoil on the dike, ditch blocks, and embankments.

(2) Disposal of unsuitable waste material shall be spread in locations approved by COR.

(3) No separate payment shall be made for this item. Compensation shall be included for the respective bid item to which it is subsidiary:

Bid Item No. 7, Earthfill, Dike Construction Bid Item No. 8, Earthfill, Ditch Blocks Bid Item No. 9, Structure for Water Control (SWC1) Bid Item No. 10, Structure for Water Control (SWC2) Bid Item No. 11, Structure for Water Control (SWC3)

Bid Item No. 15, Structure Removal

e. Subsidiary Item, Excavation, Common, Structure Removal

(1) This item shall consist of the removal of four pumps, ductile iron pipes, corrugated metal pipes, reinforced concrete pipes, and surrounding soil as shown on the construction drawings.

(2) Disposal of unsuitable waste material shall be spread in locations approved by COR.

(3) All rocks larger than 6 inches in diameter must be stockpiled and removed from the

NRCS Aspring Wetland Restoration Project 21-6 August 2016 site.

(4) No separate payment shall be made for this item. Compensation shall be included for the respective bid item to which it is subsidiary:

NRCS Aspring Wetland Restoration Project 23-6 August 2016 surface of the completed earthfill.

Method 6—Payment for each type and compaction class of earthfill and earth backfill is made at the contract unit price for that type and compaction class of earthfill. Such payment will constitute full compensation for all labor, material, equipment, and all other items necessary and incidental to the performance of the work.

Method 7—Payment for each type and compaction class of earthfill and earth backfill is made at the contract unit price for that type and compaction class of earthfill. Such payment will constitute full compensation for all labor, material, equipment, and all other items necessary and incidental to the performance of the work except furnishing, transporting, and applying water to the foundation and earthfill material.

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 the items to which they are made subsidiary are identified in section 10 of this specification, Items of work and construction details.

10. Items of work and construction details

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

a. Bid Item No.7, Earthfill, Dike Construction Bid Item No.8, Earthfill, Ditch Block Bid Item No.18, Berm Modification (BM1);

(1) This item shall consist of the loading, hauling, placement and compaction of all earthfill required for construction of the dikes and ditch blocks to the neat lines and grades as shown on the construction drawings.

(2) The source of borrow shall be as stated in Construction Specification 21.9.b.(2).

(3) Compaction shall be Class C. Fill material shall be free of sod, brush, roots, or other perishable materials, large rocks and hard lumps or clods larger than 6 inches in size.

The moisture content of fill material shall be maintained within the limits necessary to permit efficient blending, bonding, and compaction of the materials. All fill material shall be deposited evenly in layers not exceeding 9-inches in depth before compaction. Each layer shall be thoroughly compacted by at least three (3) passes over the entire surface by at least an 8 ton vibrating steel-wheeled roller or crawler-type tractor to provide a uniformly dense fill.

(4) All materials are to be inclusive in the contract unit price. Neat lines and grades for all earthfills are defined as "Finished grade that has been compacted and stabilized per engineer specifications."

(5) All earthfill shall be placed in a manner so as to minimize air and water pollution.

NRCS Aspring Wetland Restoration Project 23-7 August 2016

(6) Measurement and payment method shall be calculated per linear foot to the nearest foot along the centerline of the dike. Measurement and payment method shall be calculated per each ditch block. Items subsidiary to this item are:

Excavation, Common, Borrow Excavation, Common, Foundation Stripping

b. Bid Item No. 16, Road Modification (RM1)

(1) This item shall consist of the loading, hauling, placement and compaction of all earthfill and shell required for construction of the road modification to the neat lines and grades as shown on the construction drawings.

(2) The source of borrow shall be as stated in Construction Specification 21.9.b.(2).

(3) Compaction shall be Class C. Fill material shall be free of sod, brush, roots, or other perishable materials, large rocks and hard lumps or clods larger than 6 inches in size.

The moisture content of fill material shall be maintained within the limits necessary to permit efficient blending, bonding, and compaction of the materials. All fill material shall be deposited evenly in layers not exceeding 9-inches in depth before compaction. Each layer shall be thoroughly compacted by at least three (3) passes over the entire surface by at least an 8 ton vibrating steel-wheeled roller or crawler-type tractor to provide a uniformly dense fill.

(4) All materials are to be inclusive in the contract unit price. Neat lines and grades for all earthfills are defined as "Finished grade plus 5% for settlement."

(5) All earthfill shall be placed in a manner so as to minimize air and water pollution.

(6) Shell materials shall consist of naturally occurring deposits formed essentially of broken mollusk shell, corals and the skeletal remains of other marine invertebrates.

Live or steamed shell, or man-made deposits as a by-product of the shellfish industry will not be permitted. “Bank run shell” is defined as shell materials meeting the above requirements which are presently found as “dry land” deposits.

(7) Measurement and payment method shall be calculated per each road modification.

Items subsidiary to this item are:

Excavation, Common, Borrow

c. Subsidiary Item, Earthfill, Class A, Structural for Concrete Overflow Weir

(1) This item shall consist of the placement and compaction of all earthfill required for the installation of the concrete overflow weir to the specified neat lines and grades as shown on the construction drawings.

(2) The source of borrow shall be as stated in Construction Specification 21.9.b.(2).

(3) Compaction shall be Class A. Fill material shall be free of sod, brush, roots, or other perishable materials, large rocks and hard lumps or clods larger than 6 inches in size.

NRCS Aspring Wetland Restoration Project 23-8 August 2016

The moisture content of fill material shall be +/- 3 percent of the optimum necessary to permit efficient blending, bonding, and compaction of the materials. All fill material shall be deposited evenly in layers not exceeding 6-inches in depth before compaction. Each layer should be compacted to at least 95 percent of the Standard Proctor maximum dry density (ASTM D698). Frequency of compaction/natural moisture content tests shall be at each lift at a minimum of 1 test per 2,500 square feet.

(4) All earthfill shall be placed in a manner so as to minimize air and water pollution.

(5) No separate payment shall be made for this item. Compensation shall be included for the respective bid item to which it is subsidiary:

Bid Item No. 13, Structure for Water Control (SWC5)

d. Subsidiary Item, Earthfill, Class A, Structural for Concrete and Precast Structure

(1) This item shall consist of the placement and compaction of all earthfill required for the installation of the concrete pipes to the specified neat lines and grades as shown on the construction drawings.

(2) The source of borrow shall be as stated in Construction Specification 21.9.b.(2).

(3) Compaction shall be Class A. Fill material shall be free of sod, brush, roots, or other perishable materials, large rocks and hard lumps or clods larger than 6 inches in size.

The moisture content of fill material shall be +/- 3 percent of the optimum necessary to permit efficient blending, bonding, and compaction of the materials. Offset the position of adjacent concrete collars along the pipeline axis by approximately 2-feet to allow for tamping between zones that may overlap. All fill material shall be deposited evenly in layers not exceeding 6-inches in depth before compaction. Within 2 feet of the concrete structure, a vibratory plate shall be used to compact the fill material uniformly. Each layer should be compacted to at least 95 percent of the Standard Proctor maximum dry density (ASTM D698). Frequency of compaction/natural moisture content tests shall be at each lift at a minimum of 1 test per 30 lf of pipe.

(4) All earthfill shall be placed in a manner so as to minimize air and water pollution.

(5) No separate payment shall be made for this item. Compensation shall be included for the respective bid item to which it is subsidiary:

Bid Item No. 9, Structure for Water Control (SWC1) Bid Item No. 10, Structure for Water Control (SWC2)

e. Subsidiary Item, Earthfill, Class C, Structure Removal

(1) This item shall consist of the placement and compaction of all earthfill required for backfilling the voids created by removing the pipe structures.

(2) The source of borrow shall be as stated in Construction Specification 21.9.b.(2).

(3) Compaction shall be Class C. Fill material shall be free of sod, brush, roots, or other

NRCS Aspring Wetland Restoration Project 23-9 August 2016 perishable materials, large rocks and hard lumps or clods larger than 6 inches in size.

The moisture content of fill material shall be maintained within the limits necessary to permit efficient blending, bonding, and compaction of the materials. All fill material shall be deposited evenly in layers not exceeding 6-inches in depth before compaction. Each layer shall be thoroughly compacted by at least three (3) passes over the entire surface by at least an 8 ton vibrating steel-wheeled roller or crawler-type tractor to provide a uniformly dense fill.

(4) All earthfill shall be placed in a manner so as to minimize air and water pollution.

(5) Neat lines for the will be as shown on the construction drawings.

(6) No separate payment shall be made for this item. Compensation shall be included for

NRCS Aspring Wetland Restoration Project 42-5 August 2016

Method 3—Before the concrete or earth backfill is placed around the conduit, the conduit shall be tested at the specified test pressure for a period of at least 2 hours. Any leaks shall be repaired, and the conduit shall be retested. The procedure shall be repeated until the conduit is watertight.

Method 4—Before the concrete or earth backfill is placed around the conduit joint to be tested, the joint shall be tested in accordance to ASTM C 1103, Standard Practice for Joint Acceptance Testing of Installed Precast Concrete Pipe Sewer Lines. Any joints showing leaks shall be relaid or repaired, and the joint shall be retested. The procedure shall be repeated until the joint passes the test.

For methods 2, 3, and 4, the pipe joints shall show no leakage. Damp spots developing on the surface of the pipe are not considered leaks.

10. Measurement and payment

Method 1—For items of work for which specific unit prices are established in the contract, the quantity of each kind, size, and class of pipe or tile is determined to the nearest 0.l foot by measurement of the laid length along the invert centerline of the conduit. Payment for each kind, size, and class of pipe or tile is made at the contract unit price for that kind, size, and class.

Such payment constitutes full compensation for furnishing, transporting, and installing the pipe or tile complete in place.

Method 2—For items of work for which specific unit prices are established in the contract, the quantity of each kind, size, and class of pipe or tile is determined as the sum of the nominal laying lengths of the sections used. Payment for each kind, size, and class of pipe or tile is determined as the sum of the nominal laying lengths of the sections used. Payment for each kind, size, and class of pipe or tile is made at the contract unit price for that kind, size, and class.

Such payment constitutes full compensation for furnishing, transporting, and installing the pipe or tile complete in place.

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 the items to which they are made subsidiary are identified in section 11 of this specification, Items of work and construction details.

11. Items of work and construction details

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

a. Bid Item No. 9, Structure for Water Control (SWC1);

Bid Item No. 10, Structure for Water Control (SWC2);

Bid Item No. 11, Structure for Water Control (SWC3);

(1) This item shall consist of furnishing the specified materials and installing the concrete conduit to the neat lines and grades as shown on the construction drawings.

(2) The concrete pipes shall be Class III, with a wall thickness of 2.5-inches and a 28 day compressive strength of 4000 psi.

(3) In Section 3, Laying and bedding, the concrete pipe shall be placed to the neat lines and grades as shown on the construction drawings.

NRCS Aspring Wetland Restoration Project 42-6 August 2016

(4) In Section 5, Jointing bell and spigot pipe, Method 2 shall apply.

(5) In Section 9, Pressure testing, Method 1 shall apply.

(6) Measurement and payment method shall be calculated per each for the aforementioned bid item.

(7) Items of work subsidiary to this bid item are:

Excavation, Common, Foundation Stripping Excavation, Common, Borrow Excavation, Common, Structural Earthfill, Class A, Structural for Concrete and Precast Structure Vegetative Measures, Seeding and Mulching Rock Riprap Drainfill Geotextile

NRCS Aspring Wetland Restoration Project 61-4 August 2016

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

a. Subsidiary Item, Rock Riprap

(1) This item shall consist of furnishing the specified materials and installing rock riprap on the upstream and downstream sides of the concrete overflow weir (SWC5), the proposed culverts (SWC1, SWC2, and SWC3), and on the specified dike locations identified in the construction plans to the neat lines and grades as shown on the construction drawings.

(2) Riprap may be equipment placed with hand work to fill voids and provide uniformity.

Hand placement of the rock will be required adjacent to the concrete overflow weir outfall.

(3) Provide sound, hard, durable rubble, free of open or incipient cracks, soft seams, or other structural defects, consisting of broken stone with a specific gravity of at least 2.4.

Ensure that stones are rough and angular and the diameter of the largest stone size should be no greater than one and one-half times the D50 size, which is 6-inches for FDOT Type A and 12-inches for FDOT Type B.

(4) Contractor will provide engineer with FDOT certification letter prior to beginning riprap work.

(5) Bedding for the riprap will be prepared using FDOT No. 57 stone placed on top of the geotextile layer as shown on the construction drawings. Depth of the bedding surface shall be 6 inches. The geotextile shall be keyed into the ground at the edges and then wrapped over the bedding stone prior to cover with larger riprap stone, as shown on the construction drawing detail.

(6) No separate payment shall be made for this item. Compensation shall be included for

Bid Item No. 7, Earthfill, Dike Construction (DK1) Bid Item No. 9, Structure for Water Control (SWC1)

Bid Item No. 10, Structure for Water Control (SWC2)

NRCS Aspring Wetland Restoration Project 441-1 August 2016

Construction Specification 441-Invasive Exotic Plant Species

1. Scope Work shall consist of implementing methods to reduce or eliminate the spread of invasive exotic plant species on the project site. All work will be performed in accordance with this specification. All methods of chemical and mechanical treatments shall comply with Federal, State, and local laws, rules, and regulations. This specification applies to Florida Exotic Pest Plant Council (FLEPPC) Category I and selected Category II species.

2. Equipment Standard equipment to control and/or eradicate invasive exotic plant species include but are not limited to the following.

• Tracked Excavator

• Tracked Front-end Loader

• Mower or bush hog

• Chainsaw

• Machete

• Protective equipment, such as head gear, eye protection, clothing and gloves shall be used by all mechanical and chemical applicators.

The contractor shall practice proper sanitation procedures for equipment and by workers to avoid unnecessary spreading of invasive exotic pest plant species within and from the treatment sites. Prior to entry into the site areas, earth moving and excavation equipment (motorized or hand powered) will be inspected and cleaned of extraneous soil and debris.

Earth moving and excavation equipment used in areas where invasive species are present will be cleaned free of debris and soil within an upland area near the infected area prior to removal of the equipment from the area. Equipment cleaning will include a combination of mechanical removal of excess dirt and washing with a mobile pressure washer, if necessary.

This protocol will help prevent the transport of invasive species seeds or propagules (roots, tubers, etc.) to unaffected areas.

All Federal, State, and local regulations will be followed and authorizations obtained to ascertain the successful and safe application for burning these materials.

3. Site preparation The contractor shall coordinate delivery of necessary equipment and personnel to make required mechanical treatments.

Mechanically removed vegetation shall be stockpiled in a suitable location(s) within the project site as designated by the Engineer for removing offsite or for burning as needed.

4. Treatment The contractor must submit to the COR an Exotic Plants Species Plan that includes the methods and equipment to be used for removal and/or treatment of invasive exotic plant species identified at the site. The plan shall include such items as:

NRCS Aspring Wetland Restoration Project 441-2 August 2016

• Types of equipment used on the project site.

• The plan shall include methods and procedures to prevent the introduction and spread of invasive exotic plant species to new locations within the project site by construction and operational activities.

• Schedule and sequence of vegetation removal and or treatment tasks and procedures.

• A controlled burn plan complying with County ordinances, if proposed.

• Identify methods and locations for the disposal of cut vegetation.

• Identify and locate access sites to the treatment areas.

5. Quality Control System

On a weekly basis, in conjunction with the daily logs, the contractor shall identify (delineate on a map and/or flag, and describe) for the NRCS Inspector, which portion of the area has been completed. The contractor shall notify the NRCS Inspector at least 48 hours in advance of his work schedule, including area where the contractor will be working and hours of work.

The contractor shall submit to the NRCS Inspector daily logs at the end of each week, listing location within exotic species were treated and method of treatment.

6. Quality Control Personnel

The contractor or someone knowledgeable in invasive exotic plant species identification shall be on-site during the treatment of invasive exotic plant species. The contractor shall document the invasive exotic plant species present, extent, and method of disposal.

7. Measurement and payment

Method 1—For items of work for which specific unit prices are established in the contract, each area treated is measured as specified in section 8 of this specification, Items of work and construction details, and the area calculated to the nearest 0.1 acre. Payment for treatment is made at the contract unit price for the designated treatment, which will constitute full compensation for all labor, equipment, materials, tools, and all other items necessary and incidental for completion of the work.

When specified as an item of work, mesh or netting is measured to the nearest square yard of surface area covered and accepted. Payment is made at the contract unit price and will constitute full compensation for all labor, equipment, materials, tools, and all other items necessary and incidental for completion of the work.

Method 2—For items of work for which specific lump sum prices are established in the contract, the quantity of work will not be measured for payment. Payment for this item is made at the contract lump sum price for the item and will constitute full compensation for all labor, equipment, materials, tools, and all other items necessary and incidental to the completion of the work.

Method 3—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds. Progress payments will be determined as specified in

NRCS Aspring Wetland Restoration Project 441-3 August 2016 section 8 of this specification, Items of work and construction details. Payment of the lump sum contract price will constitute full compensation for all labor, equipment, materials, tools, and all other items necessary and incidental for 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 the item(s) to which they are made subsidiary are identified in section 8 of this specification, Items of work and construction details.

8. Items of work and construction details

FLEPPC Category I invasive species identified present within the Aspring WRP project area include: brazilian peppertree, cogon grass, napier grass, para grass, Peruvian primrose-willow, torpedo grass, tropical soda apple, water-hyacinth, and West Indian marsh grass.

The Contractor shall be responsible for confirming the extent of the infestation and the nature of the exotic plant species prior to submitting a bid and verify prior to commence of construction.

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

a. Subsidiary Item, Invasive Exotic Plant Species

(1) This item shall consist of developing and implementing an Exotic Species Plan to identify measures the Contractor will undertake to reduce or eliminate the further spread of invasive exotic plant species on the site.

(2) Prior to start of work, the contractor shall submit to the COR and COR’s representative for approval of the proposed Exotic Plant Species Plan.

(3) The plan shall include measures the Contractor will implement to avoid transport and dispersal of invasive exotic species.

(4) The Exotic Plant Species Plan shall identify the location and areas for exotics removal, list materials and methods to address the invasive species present that are currently listed on the FLEPPC Category I lists.

(5) No separate payment shall be made for this item. Compensation shall be included in the payment for the respective bid item to which it is incidental:

Bid Item No.1, Clearing and Grubbing

NRCS Aspring Wetland Restoration Project 442-6 August 2016

a. Bid Item No. 12, Structure for Water Control (SWC4)

(1) This item shall consist of providing and installing the geocell, earthfill and appurtenances to the neat lines and grades as shown on the construction drawings.

(2) The Contractor shall use Presto/ATRA geosystems or equivalent. The geocell depth shall be a minimum 3-inch thick and the material shall be perforated.

(3) Compaction shall be Class C. Fill material shall be free of sod, brush, roots, or other perishable materials, large rocks and hard lumps or clods larger than 6 inches in size. The moisture content of fill material shall be maintained within the limits necessary to permit efficient blending, bonding, and compaction of the materials.

All fill material shall be deposited evenly in layers not exceeding 9-inches in depth before compaction. Each layer shall be thoroughly compacted by at least three (3) passes over the entire surface by at least an 8 ton vibrating steel-wheeled roller or crawler-type tractor to provide a uniformly dense fill.

(4) The stakes used for anchoring the geocell shall be a minimum of 30 inches in length. Stakes shall be installed every other cell along the width of the weir and on 4 feet centers along the length. Installation of stakes shall be at every other cell at slope termination.

(5) Payment for Structure for Water Control (SWC4) as detailed on the Contract Documents will be made per each once the Engineer has approved the completion.