Amendment_0003_Docs.pdf

NRCS-NEH-642 6-1 May 2001

Construction Specification 2—Clearing and Grubbing

1. Scope The work consists of clearing and grubbing and disposal of trees, snags, logs, brush, stumps, shrubs, and rubbish from the designated areas.

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, vehicular parking, and excessive foot or vehicular 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 construction operations shall have the end smoothly cut perpendicular to the root. Roots exposed during excavation or other operations shall be covered with moist earth or backfilled as soon as possible to prevent the roots from drying out.

3. Marking The limits of the area(s) to be cleared and grubbed will be marked by stakes, flags, tree markings, or other suitable methods. Trees to be left standing and uninjured will be designated by special markings placed on the trunk about 6 feet above the ground surface.

4. Clearing and grubbing All trees not marked for preservation and all snags, logs, brush, stumps, shrubs, rubbish, and similar materials shall be cleared from within the limits of the designated areas. Unless otherwise specified, all stumps, roots, and root clusters that have a diameter of 1 inch or larger shall be grubbed out to a depth of at least 2 feet below subgrade for concrete structures and 1 foot below the ground surface at embankment sites and other designated areas.

5. Disposal All materials cleared and grubbed from the designated areas shall be disposed of at locations shown on the drawings or in a manner specified in section 7. The contractor is responsible for complying with all local rules and regulations and the payment of any and all fees that may result from disposal at locations away from the project site.

6. Measurement and payment Method 1—For items of work for which specific units prices are established in the contract, the

NRCS-NEH-642 6-2 May 2001 cleared and grubbed area is measured to the nearest 0.1 acre. Payment for clearing and grubbing is made for the total area within the designated limits at the contract unit price. Such payment will constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 2—For items of work for which specific unit prices are established in the contract, the length of the cleared and grubbed area is measured to the nearest full station (100 feet) along the line designated on the drawing or identified in the specifications. Payment for clearing and grubbing is made for the total length within the designated limits at the contract unit price. Such payment will constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 3—For items of work for which specific unit prices are established in the contract, each tree, stump, and snag having a diameter of 4 inches or larger and each log having a diameter of 4 inches or larger and a length of 10 feet are measured before removal. The size of each tree and snag is determined by measuring its trunk at breast height above the natural ground surface. The size of each log is determined by measuring the butt and by measuring its length from butt to tip.

The size of each stump is measured at the top. Diameter is determined by dividing the measured circumference by 3.14.

Payment for clearing and grubbing of each tree, stump, and snag having a diameter of 4 inches or larger and each log having a diameter of 4 inches or larger and a length of 10 feet or larger is made at the contract unit price for its size designation as determined by the following schedule:

Measured diameter Size designation

(in) (in)

4 to 8 6 8 to 12 10 12 to 24 18 24 to 36 30 36 to 60 48 Over 60 60

The sum of such payments shall constitute full compensation for clearing and grubbing (including the clearing and grubbing of smaller trees, stumps, snags, logs, brush, shrubs, and roots), applicable permits and associated fees, and rubbish removal. Such payment shall constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 4—For items of work for which specific lump sum prices are established in the contract, payment for clearing and grubbing is made at the contract lump sum price. Such payment shall constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

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

NRCS-NEH-642 6-3 May 2001

Compensation for any item of work described in the contract, but not listed in the bid schedule will be 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 7.

NRCS-Montana Cedar Creek Diversion Channel Lining 6-4 August 2018

7. Items of Work and Construction Details

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

a. Bid Item 13, Clearing and Grubbing

1. This item shall consist of all work required by the contractor to remove and dispose of trees, wood, and other plant matter from the lined reaches where such material interferes with the excavation, liner, and earthfill lines and grades within the designated stations on the construction drawings. It shall also consist of all work required to fill voids resulting from grubbing that extend below liner grade.

2. In Section 3, MARKING, the NRCS will provide initial stake out of clearing and grubbing limits at the same time as construction stakeout described in Construction Specification 7, Construction Surveys. Marking will consist of designated beginning and ending stations where clearing and grubbing is likely to be required. The contractor shall be responsible for maintaining or re-establishing such marking as construction progresses.

3. In Section 4, CLEARING AND GRUBBING, the contractor shall clear and grub all materials described in this section that interfere with the excavation, liner, and earthfill lines and grades shown on the drawings within the designated stationing. All stumps, roots, and root clusters that have a diameter of 1 inch or larger shall be grubbed out to a depth at least 1 foot below the liner elevation. Voids extending below liner grade shall be filled in accordance with Construction Specification 21, Excavation, Section 8, Overexcavation.

4. In Section 5, DISPOSAL, all vegetative and woody material generated during clearing and grubbing shall be hauled to and stockpiled within the disposal area designated on the construction drawings.

5. Clearing and grubbing quantity is 500 lineal feet.

6. In Section 6, MEASUREMENT AND PAYMENT, Method 2, shall apply and length shall be referenced to the channel centerline alignment established for this project and shown in the construction drawings.

NRCS-NEH-642 7-1 January 2009

Construction Specification 7—Construction Surveys

1. Scope The work consists of performing all surveys, measurements, and computations required by this specification.

2. Equipment and material Equipment for construction surveys shall be of a quality and condition to provide the required accuracy. The equipment shall be maintained in good working order and in proper adjustment at all times. Records of repairs, calibration tests, accuracy checks, and adjustments shall be maintained and be available for inspection by the engineer. Equipment shall be checked, tested, and adjusted as necessary in conformance with manufacturer's recommendations.

Material is field notebooks, stakes, templates, platforms, equipment, spikes, steel pins, tools, and all other items necessary to perform the work specified.

3. Quality of work All work shall follow recognized professional practice and the standards of the industry unless otherwise specified in section 9 of this specification. The work shall be performed to the accuracy and detail appropriate for the type of job.

notes, sketches, and other data shall be complete, recorded neatly, legible, reproducible and organized to facilitate ease in review and allow reproduction of copies for job documentation. Survey equipment that requires little or no manual recording of field data shall have survey information documented as outlined in section 9 of this specification.

All computations shall be mathematically correct and shall include information to identify the bid item, date, and who performed, checked, and approved the computations. Computations shall be legible, complete, and clearly document the source of all information used including assumptions and measurements collected.

If a computer program is used to perform the computations, the contractor shall provide the engineer with the software identification, vendor's name, version number, and other pertinent data before beginning survey activities. Computer generated computations shall show all input data including values assigned and assumptions made.

The elevations of permanent and temporary bench marks shall be determined and recorded to the nearest 0.01 foot.

Differential leveling and transit traverses shall be of such precision that the error of vertical closure in feet shall not exceed plus or minus 0.1 times the square root of the traverse distance in miles. Linear measurements shall be accurate to within 1 foot in 5,000 feet, unless otherwise specified in section 9 of this specification. The angular error of closure for transit traverses shall not exceed 1 minute times the square root of the number of angles turned.

The minimum requirements for placing slope stakes shall be at 100-foot stations for tangents, as little as 25 feet for sharp curves, breaks in the original ground surface and at any other intermediate stations necessary to ensure accurate location for construction layout and measurement. Slope stakes and cross sections shall be perpendicular to the centerline.

Significant breaks in grade shall be determined for cross sections. Distances shall be measured horizontally and recorded to the nearest 0.1 foot. Side shots for interim construction stakes may be taken with a hand level.

Unless otherwise specified in section 9 of this specification, measurements for stationing and establishing the location of structures shall be made to the nearest 0.1 foot.

Elevations for concrete work, pipes, and mechanical equipment shall be determined and recorded to the nearest 0.01 foot.

Elevations for earth work shall be determined and recorded to the nearest 0.1 foot.

4. Primary control The baselines and bench marks for primary control, necessary to establish lines and grades needed for construction, are shown on the drawings and have been located on the job site.

These baselines and bench marks shall be used as the origin of all surveys, layouts, and measurements to establish construction lines and grades. The contractor shall take all necessary precautions to prevent the loss or damage of primary control points. Any stakes or control points lost or damaged by construction activity will be reestablished by the contractor or at contractor expense.

NRCS-NEH-642 7-2 January 2009

5. Construction surveys Before work starts that requires contractor performed surveys, the contractor shall submit in writing for the engineer's review: the name, qualifications, and experience of the individuals to be assigned to the survey tasks.

Method 1—Contractor performed surveys shall include:

• checking and any supplemental or interim staking

• performing quantity surveys, measurements, and computations for progress payment

• other surveys as described in section 9 of this specification

Method 2—Contractor performed surveys shall consist of all work necessary for:

• establishing line and grade for all work

• setting slope stakes for all work

• checking and any supplemental or interim staking

• establishing final grade stakes

• performing quantity surveys, measurements, and computations for progress payment

• other surveys as described in section 9 of this specification

Method 3—Contractor performed surveys shall consist of all work necessary for:

• establishing line and grade for all work

• setting slope stakes for all work

• checking and any supplemental or interim staking

• establishing final grade stakes

• performing quantity surveys, measurements, and computations for progress payments

• performing original (initial) and final surveys for determinations of final quantities

• other surveys as described in section 9 of this specification

6. Staking The construction staking required for the item shall be completed before work on any item starts. Construction staking shall be completed as follows or as otherwise specified in section 9 of this specification:

Clearing and grubbing—The boundary of the area(s) to be cleared and grubbed shall be staked or flagged at a maximum interval of 200 feet, closer if needed, to clearly mark the limits of work. When contractor staking is the basis for determining the area for final payment, all boundary stakes will be reviewed by the engineer before start of this work item.

Excavation and fill—Slope stakes shall be placed at the intersection of the specified slopes and ground line. Slope stakes and the reference stakes for slopes shall be marked with the stationing, required cut or fill, slope ratio, and horizontal distance from the centerline or other control line. The minimum requirements for placing slope stakes is outlined in section 3, Quality of work.

Structures—Centerline and offset reference line stakes for location, alignment, and elevation shall be placed for all structures.

7. Records All survey data shall be recorded in fully identified standard hard-bound engineering survey field notebooks with consecutively numbered pages. All field notes and printed data shall include the purpose or description of the work, the date the work was performed, weather data, sketches, and the personnel who performed and checked the work.

Electronically generated survey data and computations shall be bound, page numbered, and cross referenced in a bound field notebook containing the index for all survey activities. All work shall follow recognized professional practice.

The construction survey records shall be available at all times during the progress of the work for examination and use by the engineer and when requested, copies shall be made available. The original field notebooks and other records shall be provided to and become the property of the owner before final payment and acceptance of all work.

NRCS-NEH-642 7-3 January 2009

Complete documentation of computations and supporting data for progress payments shall be submitted to the engineer with each invoice for payment as specified in section 9 of the specification. When the contractor is required to conduct initial and final surveys as outlined in section 5, Construction Surveys, notes shall be provided as soon as possible after completion to the engineer for the purpose of determining final payment quantities.

8. Payment Method 1—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds, after presentation of correct and accurate invoices by the contractor showing related costs and evidence of the charges of suppliers, subcontractors, and others for supplies furnished and work performed. Invoices for the total amount of the contract price will not be accepted until all surveys are complete and required documentation has been determined complete. If the total of such payments is less than the lump sum contract price for this item, the unpaid balance will be included in the final contract payment. Payment of the lump sum contract price will constitute full compensation for completion of all work under the bid item.

Method 2—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds with progress payment amounts determined as a percentage of the total work planned as projected from the contractor's approved construction schedule. Payment of the lump sum contract price will constitute full compensation for completion of all work under this bid item.

All Methods—Payment will not be provided under this item for the purchase price of materials or equipment having a residual value.

Compensation for any item of work described in the contract, but not listed in the bid schedule will be included in the payment for the item of work to which it is made subsidiary. Such items and the item to which they are made subsidiary are identified in section 9 of this specification.

NRCS-Montana Cedar Creek Diversion Channel Lining 7-4 August 2018

9. ITEMS OF WORK AND CONSTRUCTION DETAILS

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

a. Bid Item 1, Construction Surveys

1. This item shall consist of all contractor performed surveying.

2. In section 5, CONSTRUCTION SURVEYS, Method 2 shall apply. The NRCS shall perform initial staking once prior to construction in accordance with this specification and shall provide a list of the coordinates establishing such staking to the contractor. At contractor’s request, the NRCS will provide TIN surfaces depicting finished liner grade and finished cover soil grade in Autodesk Civil3D 2016 format. These surfaces will be provided as a courtesy and shall not override the NRCS staking, staking coordinates, construction drawings, or specifications as representation of required work within the contract or establishment of quantities. The contractor shall be responsible for surveying finished excavation and earthfill surfaces within the lined reaches. This data shall be submitted to the NRCS with all invoices to support quantity computations.

3. The contractor shall request initial stakeout by NRCS a minimum of 10 business days prior to construction.

4. In section 8, MEASUREMENT AND PAYMENT, Method 2 shall apply.

b. Bid Item 8, Additive Construction Surveys

1. This item shall consist of all contractor performed surveying within the additive lined reach, Stations 33+60 to 37+60.

2. Construction details of Bid Item 1 shall also apply to Bid Item 8.

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CEDAR CREEK DAM

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DIVERSION

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CHANNEL

AutoCAD SHX Text Columbia Falls Aluminum Company Property

AutoCAD SHX Text City of Columbia Falls Property

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TO DEHLBOM LANE --->

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<---TO N. FORK ROAD

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MONTANA

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MT-SO-29-18

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SMIDANSKY

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SMIDANSKY

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KRUEGER

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HOFFMAN

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FLATHEAD COUNTY

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CEDAR CREEK DIV. CHANNEL LINING

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CITY OF COLUMBIA FALLS

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PROJECT LAYOUT-REVISED

AutoCAD SHX Text PROJECT CONTROL POINT DESCRIPTIONS GPS Base Station: "X" scratched in the top of the concrete vault cover east of the City Water Tank "X" scratched in the top of the concrete vault cover east of the City Water Tank FS MON: Forest Service corner monument located midway across auxiliary spillway cross section Forest Service corner monument located midway across auxiliary spillway cross section TBM 4: " rebar in ground with yellow cap, approximately 230 ft north of Station 37+63, left side of the 12" rebar in ground with yellow cap, approximately 230 ft north of Station 37+63, left side of the channel bank while looking down channel channel bank while looking down channel TBM 5: " rebar in ground with yellow cap, approximately 87 ft south of Station 42+74. left side of the 12" rebar in ground with yellow cap, approximately 87 ft south of Station 42+74. left side of the channel bank while looking down channel TBM 7: " rebar in ground with yellow cap, approximately 37 ft right offset of Station 19+10 while looking down 12" rebar in ground with yellow cap, approximately 37 ft right offset of Station 19+10 while looking down channel UTM Zone: Zone 11N Zone 11N Horizontal Datum: NAD83 NAD83 Vertical Datum: NAVD88 (Elevations referenced to NGVD 29) NAVD88 (Elevations referenced to NGVD 29) Horizontal Distance: International Ft International Ft Vertical Distance: US Survey Ft US Survey Ft Geoid Model: Geoid09Geoid09

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TEMPORARY STAGING/ STOCKPILING AREA

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UPPER LINING REACH SEE SHEET 3

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BORROW AREA EXCAVATE NO LOWER THAN ELEVATION 3247.5 SEE SHEET 6

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TEMPORARY STAGING/ STOCKPILING AREAS

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LOWER LINING REACH SEE SHEET 4

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CHANNEL CROSSING AND TURNAROUND

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CONSTRUCTION ACCESS ROADS

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WORK LIMITS

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NOTE: WORK LIMITS ALONG CHANNEL ARE DEFINED AS

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50' OFFSET TO EACH SIDE OF CHANNEL CENTERLINE

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UNLESS SHOWN OTHERWISE.

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ADDITIVE LINING REACH SEE SHEET 5

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CLEARING/GRUBBING DISPOSAL AREA

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OUTLET WORKS

AutoCAD SHX Text WASTE DISPOSAL NOTES: Stockpile excavation waste material in temporary staging/stockpiling areas as required during construction. When borrowing of earthfill is completed, haul and spread waste material into excavations within borrow area. Rocky waste material shall be placed first and shall then be capped by soil and organic waste material. Dispose of vegetative and woody material generated during clearing and grubbing within the clearing/grubbing disposal area.

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AutoCAD SHX Text 14+84

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CUTOFF TRENCH SEE DETAIL SHEET 6

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CUTOFF TRENCH SEE DETAIL SHEET 6

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EXISTING GROUND

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CHANNEL INVERT

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CANAL3 123012 COMPOSITE LINER

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EARTHFILL COVER

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CHANNEL INVERT/ EARTHFILL COVER ELEVATION

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LINER ELEVATION

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MONTANA

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MT-SO-29-18

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SMIDANSKY

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SMIDANSKY

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KRUEGER

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HOFFMAN

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FLATHEAD COUNTY

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CEDAR CREEK DIV. CHANNEL LINING

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CITY OF COLUMBIA FALLS

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UPPER PLAN AND PROFILE

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TBM7

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CHANNEL BOTTOM SAMPLE 17-826

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SEEP HOLE SAMPLE 17-827

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CHANNEL CL

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STA 12+50 BEGIN COMPOSITE LINER BEGIN CLEARING AND GRUBBING

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STA 17+50 END COMPOSITE LINER END CLEARING AND GRUBBING

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