Specs.pdf

N a t u r a l

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PLANNED CONCRETE SIGN PAD SEE SECTION C FOR DETAILS

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BRIDGER PLANT MATERIALS CENTER

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INGRESS/EGRESS

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SOUTH RIVER ROAD

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PLANNED CHEMICAL BUILDING & MIXING PAD SEE ENGINEERING PLANS FOR DETAILS

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MACHINE SHED

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PLANNED SIDEWALK REMOVAL & REPLACEMENT SEE SECTION B FOR DETAILS

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EXISTING FUEL STORAGE TANKS SEE SECTION E FOR DETAILS

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EXISTING WELL - MINIMUM 100' FROM PLANNED MIXING PAD

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PLANNED CONCRETE APRON REMOVAL & REPLACEMENT SEE SECTION D FOR DETAILS

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TBM

AutoCAD SHX Text TBM DESCRIPTIONS: #1.) NORTHWEST CORNER OF EXISTING CONCRETE SLAB AT FUEL TANKS. N - 16452779, E - 2184621 ELEV 3732.06 GPS SURVEY SETTINGS: UTM 12N, NAD83, NAVD88, GEOID09, INTERNATIONAL SURVEY FEET, AUTONOMOUS POSITION

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MONTANA

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NORTH

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SCALE - FEET

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LOCATION MAP

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AGRICHEMICAL HANDLING FACILITY

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BRIDGER PMC

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CARBON COUNTY

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AutoCAD SHX Text 4/18 t u r a l

R e s o u r c e s

C o n s e r v a t i o n

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D e p a r t m e n t o f

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#4 REBAR AT 12" SPACING O.C. BOTH DIRECTIONS (INTERRUPT AT CONTROL JOINTS)

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4" COMPACTED SAND/GRAVEL WELL GRADED AGGREGATE GRAVEL 1.5" MINUS

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PLANNED CONCRETE MIXING PAD

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NTS

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ROUNDED DRIVE OVER CURB AROUND MIXING PAD

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4" COMPACTED SAND/GRAVEL WELL GRADED AGGREGATE GRAVEL 1.5" MINUS

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FILL WITH JOINT SEALANT

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14" MAX

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FOAM BACKER ROD

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#4 REBAR DOWELS THROUGH JOINT COATED ONE SIDE TO PREVENT BOND 30" LONG, 24" O.C.

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INTERRUPT REBAR AT CONTROL JOINTS

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SAWN FLOOR CONTROL JOINT

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1.5" MIN

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PLANNED CONCRETE SLAB BOTH MIXING PAD AND CHEMICAL BUILDING PAD

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#4 REBAR AT 12" SPACING O.C. BOTH DIRECTIONS

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4" COMPACTED SAND/GRAVEL WELL GRADED AGGREGATE GRAVEL 1.5" MINUS

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MIN = 2", MAX = 3"

AutoCAD SHX Text #4 REBAR, 12" SPACING O.C. BOTH DIRECTIONS. GRADE 60 STEEL INTERRUPT REBAR AT CONTROL JOINTS

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CONCRETE SLAB - MIXING AND STORAGE PAD

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PLANNED CONCRETE SLAB BOTH MIXING PAD AND CHEMICAL BUILDING PAD

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NTS

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AGRICHEMICAL HANDLING FACILITY NOTES:

AutoCAD SHX Text 1.) CONSTRUCTION SPECIFICATION MT-106 REINFORCED CONCRETE SHALL BE FOLLOWED. 2.) ALL REBAR REINFORCEMENT MUST BE GRADE 60 STEEL. 3.) CONCRETE SHALL HAVE AIR ENTRAINMENT BETWEEN 5-7.5%. 4.) THE CONCRETE SLUMP SHALL BE 3-5". 5.) CONCRETE SHALL BE A MINIMUM 28 DAY COMPRESSIVE STRENGTH OF 400O PSI. 6.) MIXING PAD SHOULD BE POURED IN A CONTINUOUS POUR IN ONE DAY. 7.) CONCRETE MIX SHALL BE A MINIMUM 6.5 BAGS OF CEMENT PER CUBIC YARD. 8.) ALL REINFORCEMENT SHALL BE PROPERLY SUPPORTED AND SECURED TO AVOID DISPLACEMENT DURING THE CONCRETE PLACEMENT. TACK WELDING IS NOT ALLOWED. 9.) ALL REINFORCEMENT SPLICE LENGTHS SHALL BE A MINIMUM 30 DIAMETERS. 10.) NO MIXING WATER IN EXCESS OF THE AMOUNT CALLED FOR BY THE JOB MIX SHALL BE ADDED TO THE CONCRETE DURING MIXING, HAULING OR AFTER ARRIVAL TO THE SITE. 11.) GRAVEL SURFACE SHALL BE DAMP PRIOR TO CONCRETE PLACEMENT. 12.) CONCRETE SHALL NOT BE PLACED UNTIL THE SUBGRADE, FORMS, AND STEEL REINFORCEMENT HAVE BEEN INSPECTED AND APPROVED BY NRCS. 13.) PLACED CONCRETE SHALL BE PROPERLY CURED AS SPECIFIED IN MT-106. 14.) CONCRETE SHALL NOT BE PLACED WHEN THE DAILY TEMPERATURE IS LESS THAN 40 DEGREES FAHRENHEIT. 15.) COMPACTED GRAVEL SUBBASE SHALL BE MINIMUM 4" THICK AND BE A WELL GRADED SAND/GRAVEL MIX WITH ALL GRAVEL 1.5" MINUS. 16.) SUMP PUMP SHALL BE COMPATIBLE FOR FERTILIZERS AND PESTICIDES AND PROVIDE A MINIMUM OF 20' OF LIFT.

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4" COMPACTED SAND/GRAVEL WELL GRADED AGGREGATE GRAVEL 1.5" MINUS

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SUMP DETAIL

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SUMP REINFORCEMENT #4 REBAR AT 6" O.C. SPACING BOTH WAYS EXTEND 18" INTO PAD

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#4 REBAR IN SLAB 12" SPACING O.C. BOTH DIRECTIONS

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LEVEL WITH TOP OF CURB

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SUMP WITH STEEL GRATE (OPTIONAL SINGLE LINED STAINLESS STEEL SUMP)

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PLANNED CONCRETE MIXING PAD SLAB

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CONCRETE DETAILS

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BRIDGER PMC

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CARBON COUNTY

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t u r a l

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C o n s e r v a t i o n

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U n i t e d

S t a t e s

D e p a r t m e n t o f

A g r i c u l t u r e

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AutoCAD SHX Text ROUNDED DRIVE OVER CURB 3' WIDE, 2" HIGH AROUND ENTIRE MIXING PAD SEE SHEET 4 FOR DETAILS

AutoCAD SHX Text 2' DIA x 18" DEEP SUMP SEE SHEET 4 FOR DETAILS

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#4 REBAR 12" SPACING O.C. BOTH DIRECTIONS. SEE SHEET 4 FOR DETAILS

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CONTROL JOINT

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CONTROL JOINT

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SLOPE

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SLOPE

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SLOPE

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SLOPE

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PLAN VIEW - MIXING PAD & CHEMICAL STORAGE BUILDING PAD

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CHEMICAL STORAGE BUILDING PAD

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MIXING PAD

AutoCAD SHX Text NOTE: CHEMICAL BUILDING SHALL HAVE BOLLARDS INSTALLED AROUND IT AS DESCRIBED IN SECTION E OF THE STATEMENT OF WORK.

AutoCAD SHX Text NOTES: 1.) SLOPE CHEMICAL STORAGE BUILDING PAD TO DRAIN TO THE WEST AWAY FROM MIXING PAD. 2.) EXISTING GROUND AROUND MIXING PAD & CHEMICAL STORAGE BUILDING PAD SHALL BE SHAPED TO EXCLUDE ANY CLEAN WATER FROM ENTERING PAD. POSITIVE DRAINAGE SHALL BE MAINTAINED DURING USE.

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CONSTRUCTION SPECIFICATION Reinforced Concrete MT-106-1

USDA-NRCS-Montana November 2014

Reinforced Concrete

1. SCOPE

The work shall consist of furnishing, forming, placing, finishing and curing portland cement concrete and furnishing and placing steel reinforcement as required to build the structures as shown on the drawings.

2. MATERIALS

Steel Reinforcement

Steel bars for concrete reinforcement shall be grade 40, 50, or 60 deformed bars conforming to one of the following specifications:

• Deformed and plain billet-steel bars for concrete reinforcement—ASTM A-615

• Rail-steel deformed bars for concrete reinforcement—ASTM A-996

• Axle-steel deformed bars for concrete reinforcement—ASTM A-996

Dowels shall be plain round bars conforming to the same specifications listed above for steel bars.

Fabricated deformed steel bar mats for concrete reinforcement shall conform to the requirements of ASTM A 184.

Plain steel welded wire reinforcement for concrete reinforcement shall conform to the requirements of ASTM A 185.

Deformed steel welded wire reinforcement for concrete reinforcement shall conform to the requirements of ASTM A 497.

Epoxy-coated steel bars for concrete reinforcement shall conform to the requirements of ASTM A 775.

Gauges, diameters, spacing, and arrangement of wires for welded steel wire fabric shall be as defined for the specified style designations.

Portland Cement − Portland cement shall conform to the requirements of ASTM Specification C-150 for the specified type. If a type is not specified, Type I, Type II low alkali, or Type III high early strength shall be used.

Air-Entraining Admixtures − Air-entraining admixtures shall conform to the requirements of ASTM C-260.

Aggregates − Concrete aggregates shall conform to the requirements of ASTM C-33.

Where aggregates conforming to these specifications are not obtainable, aggregates that have been shown by tests or by actual service to produce concrete of the required strength, durability, watertightness, and abrasion resistance may be used if authorized by the Engineer.

Concrete aggregates approved for use by the Montana Highway Department are acceptable.

Water − Water shall be clean and free from injurious amounts of oil, salt, acid, alkali, organic matter, or other deleterious substances.

Storage of Materials − Steel reinforcement stored at the site of the work shall be stored above the ground surface on platforms, skids, or other supports and shall be protected from mechanical injury and corrosion.

Cement and aggregate shall be stored at the site in such a manner as to prevent deterioration or intrusion of foreign matter.

Damaged materials will be rejected and not permitted to be used in the work.

CONSTRUCTION SPECIFICATION Reinforced Concrete MT-106-2

3. BENDING BAR REINFORCEMENT

Reinforcing bars may not be field milled or field bent unless specifically authorized by the Engineer. All bends shall be made in accordance with standard approved practice and by approved machine methods. All bends shall be made without heating. Bars with kinks, cracks, or improper bends will be rejected.

4. SPLICING BAR REINFORCEMENT

The length of splices of reinforcing bars shall be as shown on the drawings. When not shown on the drawings, the length of splices shall provide an overlap equal to at least 36 diameters of the smaller bar being spliced.

5. SPLICING WELDED WIRE

REINFORCEMENT

Unless otherwise specified, welded wire fabric shall be spliced in the following manner:

Adjacent sections shall be spliced end to end (longitudinal lap) by overlapping a minimum of one full mesh plus 2 inches plus the length of the two end overhangs.

The splice length is measured from the end of the longitudinal wires in one piece of fabric to the end of the longitudinal wires in the lapped piece of fabric.

Adjacent sections shall be spliced side to side (transverse lap) a minimum of one full mesh plus 2 inches. The splice length shall be measured from the centerline of the first longitudinal wire in one piece of fabric to the centerline of the first longitudinal wire in the lapped piece of fabric.

6. SUPPORTING REINFORCEMENT

Reinforcement shall be accurately placed and secured in position in a manner that will prevent its displacement during the placement of concrete. Tack welding of bars will not be permitted.

Metal chairs, metal hangers, metal spacers and concrete chairs may be used to support the reinforcement. Metal hangers, spacers and ties shall be placed in such a manner that they will not be exposed in the finished concrete surface. The legs of metal chairs or side form spacers that may be exposed on any face of slabs, walls, beams or other concrete surfaces shall have a protective coating or finish by means of hot dip galvanizing, epoxy coating, plastic coating, or be stainless steel. Metal chairs and spacers not fully covered by a protective coating or finish shall have a minimum cover of 3/4-inch of concrete over the unprotected metal portion except for those with plastic coatings may have a minimum cover of 1/2-inch of concrete over the unprotected metal portion.

Precast concrete chairs shall be manufactured of the same class of concrete as that specified for the structure and shall have tie wires securely anchored in the chair or a V-shaped groove at least 3/4-inch in depth molded into the upper surface to receive the steel bar at the point of support.

Precast concrete chairs shall be clean and moist at the time concrete is placed.

7. PLACING REINFORCEMENT

The following tolerances will be permitted in the placement of bars as shown on the drawings:

CONSTRUCTION SPECIFICATION Reinforced Concrete MT-106-3

TABLE 1

Maximum Net Water Content (gallons/bag)

Minimum Cement Content (bags/cubic yard)

Class of Concrete Without Air Entrainment

With Air Entrainment

Without Strength Test

With Strength Test

3000 7 6 6 5 4000 6 5 6.5 6

Note: A bag of cement weighs 94 pounds.

7. PLACING REINFORCEMENT

(continued)

Variation in protective cover:

1/4 inch for 2-inch cover 1/2 inch for 3-inch cover

Variation of spacing:

1/12 of indicated spacing

Before reinforcement is placed, the surfaces of the bars and fabric and any metal supports shall be cleaned to remove any loose, flaky rust, mill scale, oil, grease or other coatings or foreign substances. After placement, the reinforcement shall be maintained in a clean condition until it is completely embedded in the concrete. On structures exceeding 2 cubic yards in concrete volume, the subgrade and placement of the reinforcing material shall be inspected by the Technician prior to placing the concrete.

8. DESIGN OF CONCRETE MIX

Concrete shall be classified as shown in Table 1.

Concrete shall be composed of portland cement, fine and coarse aggregates, water, and unless otherwise specified, an air-entraining admixture mixed in such proportions so as to produce the specified minimum compressive strength at the end of 28 days.

Calcium chloride or other corrosive accelerators shall not be used unless otherwise specified.

The maximum gallons of water per bag of cement and the minimum number of bags of cement per cubic yard of concrete for the specified class of concrete shall be as tabulated in Table 1.

Concrete mixtures shall be designed to use a maximum size of coarse aggregate of 1-1/2 inches. The proportioning of cement, sand, and coarse aggregate shall produce a concrete mixture, neither too sandy nor too harsh, that will work readily into the corners and angles of the forms and around reinforcement when consolidated, but will not segregate or exude free water during consolidation.

Unless otherwise specified, the slump at the time of placement shall be 3 to 5 inches. Air content by volume shall be 5-7% of the volume of the concrete.

9. QUALITY OF CONCRETE

Control − Prior to placement of any concrete, the Contractor shall furnish a statement to the Technician giving the proportions by dry weight of cement, aggregates, water and admixtures that they intend to use. If requested by the Technician, the Contractor shall furnish evidence satisfactory to the Technician that the proportions selected will produce concrete of the quality specified. The materials and

CONSTRUCTION SPECIFICATION Reinforced Concrete MT-106-4 proportions so stated shall constitute the "job mix."

After a job mix has been approved, neither the source, character, grading of the aggregates nor the type or brand of cement or admixture shall be changed without prior notice to the Technician. If such changes are necessary, no concrete containing such new or altered materials shall be placed until the Technician has approved a revised job mix.

10. INSPECTION AND TESTING

The Technician shall have free entry to the plant and equipment furnishing concrete.

Proper facilities shall be provided for the Technician to inspect materials, equipment, and processes and to obtain samples of the concrete. All tests and inspections will be conducted so as not to interfere unnecessarily with manufacture and delivery of the concrete.

If specified in the special provisions, standard tests of the compressive strength of the concrete will be made by the Contractor from concrete test cylinders cast by the Technician in conformance with ASTM C-

31. The Contractor shall provide cylinder molds and shall have the cylinders tested by an approved laboratory (the Contractor bearing the costs of such testing).

One strength test shall consist of three standard cylinders made from a composite sample secured from a single load of concrete in accordance with ASTM C-172 and tested at 28 days. The test results at 28 days shall be the average of the strength of three specimens determined in accordance with ASTM C-39, except that if one specimen shows manifest evidence of improper sampling, molding, or testing, it shall be discarded and the strengths of the remaining two specimens shall be averaged.

Should more than one specimen representing a test show such defects, the entire test shall be discarded.

One strength test, consisting of three test cylinders, shall be made for (1) each day's run or (2) for each 25 cubic yards of concrete placed, or fraction thereof.

A record shall be made of the particular load of concrete tested, and the exact location in the work at which each load represented by a strength test is deposited.

In the event that concrete tested in accordance with the requirements stated above fails to meet the strength requirements of these specifications, the contractor shall provide an acceptable new or adjusted mix.

11. HANDLING AND MEASUREMENT

OF MATERIALS

Materials shall be stockpiled and batched by methods that will prevent segregation or contamination of aggregates and insure accurate proportioning of the ingredients of the mix.

Cement shall be measured by weight or in bags of 94 pounds each. When cement is measured in bags, no fraction of a bag shall be used unless weighed.

Aggregates shall be measured by weight.

Mix proportions shall be based on saturated, surface-dry weights. The batch weight of each aggregate shall be the required saturated, surface-dry weight plus the weight of surface moisture it contains.

Water shall be measured, by volume or by weight, to accuracy within 1% of the total quantity of water required for the batch.

Admixtures shall be measured within a limit of accuracy of 3%.

12. MIXERS AND MIXING

Concrete may be furnished by batch mixing at the site of the work or by ready-mix methods.

CONSTRUCTION SPECIFICATION Reinforced Concrete MT-106-5

Mixers shall be capable of thoroughly mixing the concrete ingredients into a uniform mass and of discharging the mix without segregation.

Concrete shall be uniform and thoroughly mixed when delivered to the work site.

Variations in slump of more than l inch within a batch will be considered evidence of inadequate mixing and shall be corrected by changing batching procedures, increasing mixing time, changing mixers, or other means.

For stationary mixers, the mixing time after all cement and aggregates are in the mixer drum shall be not less than 1-1/2 minutes.

When concrete is mixed in a truck mixer, the number of revolutions of the drum or blades at mixing speed shall be not less than 70 nor more than 100.

Unless otherwise specified, volumetric batching and continuous mixing at the construction site will be permitted. The batching and mixing equipment shall conform to the requirements of ASTM Specification C-685 and shall be demonstrated prior to placement of concrete, by tests with the job mix, to produce concrete meeting the specified proportioning and uniformity requirements. Concrete made by this method shall be produced, inspected, and certified in conformance with Sections 6, 7, 8, 13, and 14 of ASTM Specification C-685.

No mixing water in excess of the amount called for by the job mix shall be added to the concrete during mixing or hauling or after arrival at the delivery point.

When truck ready-mixed or truck-mixed concrete is used, the Contractor shall submit to the Technician, with each mixer load, a certified delivery ticket giving the quantities of cement, fine aggregate, coarse aggregate, water, and admixtures, if any, contained in the batch and the time the cement was introduced to the aggregates.

13. FORMS

Forms shall be of wood, plywood, steel, or other approved material and shall be mortar tight. The forms and associated false-work shall be substantial, unyielding and shall be constructed so that the finished concrete will conform to the specified dimensions and contours. Form surfaces shall be smooth and free from holes, dents, sags or other irregularities. Forms shall be coated with a non-staining form release agent before being set into place.

Metal ties or anchorages within the forms shall be equipped with cones, she-bolts or other devices that permit their removal to a depth of at least 1 inch without injury to the concrete. Ties designed to break off below the surface of the concrete shall not be used without cones.

All edges that will be exposed to view when the structure is completed shall be chamfered, unless finished with molding tools.

14. PREPARATION OF FORMS AND

SUBGRADE

Prior to placement of concrete the forms and subgrade shall be free of chips, sawdust, debris, water, ice, snow, extraneous oil, mortar, or other harmful substances or coatings. The temperature of all surfaces to be in contact with the new concrete shall be no colder than 40 degrees Fahrenheit. Any oil on the reinforcing steel or other surfaces required to be bonded to the concrete shall be removed. Rock surfaces shall be cleaned by air-water cutting, wet sandblasting or wire brush scrubbing, as necessary, and shall be wetted immediately prior to placement of concrete. Earth surfaces shall be firm and damp. Placement of concrete on mud, dried

CONSTRUCTION SPECIFICATION Reinforced Concrete MT-106-6 earth or un-compacted fill or frozen subgrade will not be permitted.

Items to be embedded in the concrete shall be positioned accurately and anchored firmly.

Weep holes in walls or slabs shall be formed with non-ferrous materials.

15. CONVEYING

Concrete shall be delivered to the site and discharged into the forms within 1-1/2 hours after the introduction of the cement to the aggregates. In hot weather or under conditions contributing to quick stiffening of the concrete, or when the temperature of the concrete is 85 degrees Fahrenheit or above, the time between the introduction of the cement to the aggregates and discharge shall not exceed 45 minutes.

The Technician may allow a longer time, provided the setting time of the concrete is increased a corresponding amount by the addition of an approved set-retarding admixture. In any case, concrete shall be conveyed from the mixer to the forms as rapidly as practicable by methods that will prevent segregation of the aggregates or loss of mortar.

16. PLACING

Concrete shall not be placed until the subgrade; forms and steel reinforcement have been inspected and approved by the Technician. The Contractor shall give reasonable notice to the Technician each time he or she intends to place concrete.

The concrete shall be deposited as closely as possible to its final position in the forms and shall be worked into the corners and angles of the forms and around all reinforcement and embedded items in a manner to prevent segregation of aggregates or excessive laitance. Formed concrete shall be placed in horizontal layers not more than 20 inches thick. Concrete shall not be dropped more than 5 feet vertically unless suitable equipment is used to prevent segregation.

Hoppers and chutes, pipes or "elephant trunks" shall be used as necessary to prevent segregation and the splashing of mortar on the forms and reinforcing steel above the layer being placed.

Immediately after the concrete is placed in the forms, it shall be consolidated by spading, hand tamping or vibration as necessary to insure smooth surfaces and dense concrete. Each layer shall be consolidated to insure a monolithic bond with the preceding layer. If the surface of a layer of concrete in place sets to the degree that it will not flow and merge with the succeeding layer when spaded or vibrated, the Contractor shall discontinue placing concrete and shall make a construction joint according to the procedure specified herein.

If placing is discontinued when an incomplete horizontal layer is in place, the unfinished end of the layer shall be formed by a vertical bulkhead.

17. CONSTRUCTION JOINTS

Construction joints shall be made at the locations shown on the drawings. If construction joints are needed which are not shown on the drawings, they shall be placed in locations approved by the Technician.

Where a feather edge would be produced at a construction joint, as in the top surface of a sloping wall, an insert form shall be used so that the resulting edge thickness on either side of the joint is not less than 3 inches.

In walls and columns, as each lift is completed, the top surfaces shall be immediately and carefully protected from any condition that might adversely affect the hardening of the concrete.

CONSTRUCTION SPECIFICATION Reinforced Concrete MT-106-7

Steel tying and form construction adjacent to concrete in-place shall not be started until the concrete has cured at least 12 hours.

Before new concrete is deposited on or against concrete that has hardened, the forms shall be retightened. New concrete shall not be placed until the hardened concrete has cured at least 12 hours.

Surfaces of construction joints shall be cleaned of all unsatisfactory concrete, laitance, coatings or debris by washing and scrubbing with a wire brush or wire broom or by other means approved by the Technician. The surfaces shall be kept moist for at least 1 hour prior to placement of the new concrete.

18. EXPANSION AND CONTRACTION

Expansion and contraction joints shall be made only at locations shown on the drawings.

Exposed concrete edges at expansion and contraction joints shall be carefully tooled or chamfered, and the joints shall be free of mortar and concrete. Joint filler shall be left exposed for its full length with clean and true edges.

Preformed expansion joint filler shall be held firmly in the correct position as the concrete is placed.

When open joints are specified, they shall be constructed by the insertion and subsequent removal of a wooden strip, metal plate or other suitable template in such a manner that the corners of the concrete will not be chipped or broken. The edges of open joints shall be finished with an edging tool prior to removal of the joint strips.

19. WATERSTOPS

Waterstops shall be held firmly in the correct position as the concrete is placed.

Joints in metal waterstops shall be soldered, brazed or welded. Joints in rubber or plastic waterstops shall be cemented, welded or vulcanized as recommended by the manufacturer.

20. REMOVAL OF FORMS

Forms shall be removed in such a way as to prevent damage to the concrete. Supports shall be removed in a manner that will permit the concrete to take the stresses due to its own weight uniformly and gradually.

Forms shall not be removed sooner than the following minimum times after the concrete is placed. These periods represent cumulative number of days and fractions of days, not necessarily consecutive, during which the temperature of the air adjacent to the concrete is above 50 degrees Fahrenheit.

Element Time

Beams, arches--supporting 14 days forms and shoring

Conduits, deck slabs--supporting 7 days (inside) forms and shoring

Conduits, (outside forms), 24 hours sides of beams, small structures

Columns, walls, spillway 7 days risers--with side or vertical load

Columns, walls, spillway risers --with no side or vertical load:

Concrete supporting more 7 days than 30 feet of wall in place above it

Concrete supporting 20 to 30 3 days feet of wall in place above it

CONSTRUCTION SPECIFICATION Reinforced Concrete MT-106-8

Element (continued) Time

Concrete supporting not 24 hours more than 20 feet of wall in place above it1 1Age of stripped concrete shall be at least 7 days before any load is applied other than the weight of the column or wall itself and the forms and scaffolds for succeeding lifts.

22. FINISHING FORMED SURFACES

All concrete surfaces shall be true and even and shall be free from open or rough spaces, depressions or projections.

Immediately after the removal of the forms:

a. All fins and irregular projections shall be removed from exposed surfaces.

b. The holes produced on all surfaces by the removal of form ties, cone-bolts, and she-bolts shall be cleaned, wetted and filled with a dry-pack mortar consisting of one part portland cement, three parts sand that will pass a No. 16 sieve, and just sufficient water to produce a consistency such that the filling is at the point of becoming rubbery when the material is solidly packed.

22. FINISHING UNFORMED

SURFACES

All exposed surfaces of the concrete shall be accurately screeded to grade and then wood or magnesium float finished, unless specified otherwise.

Excessive floating or troweling of surfaces while the concrete is soft will not be permitted.

The addition of dry cement or water to the surface of the screeded concrete to expedite finishing will not be allowed.

Joints and edges on unformed surfaces that will be exposed to view shall be chamfered or finished with molding tools.

23. CURING

Concrete shall be prevented from drying for a curing period of at least 7 days after it is placed. Exposed surfaces shall be kept continuously moist for the entire period, or until curing compound is applied as specified below.

Moisture shall be maintained by sprinkling, flooding or fog spraying or by covering with continuously moistened canvas, cloth mats, straw, sand or other approved material.

Wood forms left in place during the curing period shall be kept continuously wet.

Formed surfaces shall be thoroughly wetted immediately after forms are removed and shall be kept wet until patching and repairs are completed. Water or covering shall be applied in such a way that the concrete surface is not eroded or otherwise damaged.

Concrete, except at construction joints, may be coated with an approved curing compound in lieu of continued application of moisture except as otherwise specified in the special provisions. The compound shall be sprayed on the moist concrete surfaces as soon as free water has disappeared, but shall not be applied to any surface until patching, repairs and finishing of that surface are completed. The compound shall be applied at a uniform rate of not less than 1 gallon per 150 square feet of surface and shall form a continuous adherent membrane over the entire surface. Curing compound shall be thoroughly mixed before applying and continuously agitated during application.

Curing compound shall not be applied to surfaces requiring a bond to subsequently placed concrete, such as construction joints, shear plates, reinforcing steel and other embedded items. If the membrane is damaged during the curing period, the

CONSTRUCTION SPECIFICATION Reinforced Concrete MT-106-9 damaged area shall be re-sprayed at the rate of application specified above. Surfaces covered by the membrane shall not be trafficked unless protected from wear.

24. REMOVAL AND REPLACEMENT

OR REPAIR

When concrete is honeycombed, damaged or otherwise defective, the Contractor shall remove and replace the structure or structural member containing the defective concrete or, where feasible, correct or repair the defective parts. The Technician will determine the required extent of removal, replacement or repair.

25. CONCRETING IN COLD

WEATHER

Concrete shall not be mixed nor placed when the daily minimum atmospheric temperature is less than 40 degrees Fahrenheit unless facilities are provided to prevent the concrete from freezing. The temperature of the concrete at the time of placing shall not be less than 50 degrees Fahrenheit nor more than 90 degrees Fahrenheit. Concrete shall not be deposited on frozen ground nor in forms containing ice or frost. The use of accelerators or antifreeze compounds will not be allowed.

The air and forms in contact with the concrete shall be maintained at temperatures greater than 50 degrees Fahrenheit but less than 90 degrees Fahrenheit for at least 5 days and at a temperature above freezing for the remainder of the specified curing period.

Concrete permitted to be cured with curing compounds shall be provided the same protection against freezing and low temperatures as provided herein. No fire or excessive heat shall be permitted near or in direct contact with concrete at any time.

26. CONCRETING IN HOT WEATHER

The Contractor shall apply effective means to maintain the temperature of the concrete below 90 degrees Fahrenheit during mixing, conveying and placing.

Formed surfaces shall be kept completely and continuously wet for the duration of curing period (prior to, during and after form removal) or until curing compound is applied.

Concrete surfaces, especially flat work placed with large areas of surface, shall be covered as soon as the concrete has sufficiently hardened and shall be kept continuously wet for at least 24 hours of the curing period. This protective method may be continued for the required curing period or until curing compound is applied.

Moist curing may be discontinued before the end of the curing period if white pigmented curing compound is applied immediately, in accordance with the procedures specified in Section 23.

27. MEASUREMENT AND PAYMENT

(Used only if applicable)

For items of work for which specific unit prices are established, reinforced concrete will be measured to the neat lines shown on the drawings and the volume of concrete will be computed to the nearest 0.1 cubic yard. Measurement of concrete placed against the sides of an excavation without the use of intervening forms will be made only to the neat lines or pay limits shown on the drawings. No deduction in volume will be made for chamfers, rounded or beveled edges or for any void or embedded item that is less than 3 cubic feet in volume.

Payment for each item of concrete will be made at the agreed-to unit price or the agreed-to lump sum, whichever is applicable, for that item. Such payment will

CONSTRUCTION SPECIFICATION Reinforced Concrete MT-106-10 constitute full compensation for all labor, materials, including steel, equipment, transportation, tools, forms, falsework, bracing and all other items necessary and incidental to the completion of the work.

CONSTRUCTION SPECIFICATION General Requirements MT-100-1

USDA-NRCS-Montana March 2014

General Requirements

1. SCOPE

Work shall consist of furnishing all equipment and materials and performing all operations in connection with construction of the project as shown on the drawings, described in the special provisions and as staked in the field.

2. DEFINITIONS

Owner/Operator—official spokesperson for the project who enters into all contractual agreements, obtains all permits and easements necessary for construction, ensures construction in accordance with the plan drawings and specifications, and is financially responsible for the project.

Technician— Natural Resources Conservation Service (NRCS) representative who is authorized to conduct quality assurance activities. The technician makes recommendations to the owner/operator concerning changes and acceptance of the work.

Contractor— individual who has an agreement with the owner/operator to construct the project.

Technical Service Provider (TSP)— individual who is voluntarily hired by the owner/operator for design, installation, and check-out services in accordance with the Statement of Work (SOW) approved by the

NRCS.

3. SAFETY

Equipment and methods used in construction shall be in accordance with the United States Department of Labor, Occupational Safety and Health Administration (OSHA) regulations.

The contractor shall comply with OSHA Parts 1910 and 1926, Construction Industry Standards and Interpretations. The contractor shall ensure a safe working environment and operate under a construction safety program that is in compliance with Federal, State, and local laws and regulations.

When personnel must enter confined spaces, trenches, or other excavations, the contractor shall comply with OSHA Safety and Health Standards, Part 1926, Safety and Health Regulations for Construction, Subpart P, Excavations.

A potential hazard to life and property exists from the disturbance of utilities by construction.

The excavator is responsible for calling the Utility Notification Center at least two full business days before excavation begins to ensure that all publicly-owned underground utilities are marked. The “Call Before You Dig” phone number for Montana (except for Lincoln and Flathead Counties) is 811 or 1- 800-551-8344. The “Call Before You Dig” phone number for Flathead and Lincoln Counties is: 1-800-551-8344 (there is no 811 equivalent for this area). The excavator will be held responsible for damages to utilities and property if such notice is not provided.

The excavator is the person who actually performs the excavation, soil borings, or similar construction activity.

The locate ticket number shall be provided by the excavator to the NRCS prior to the start of construction inspection by the NRCS. The ticket number should be provided to the owner/operator on projects where NRCS employees are not present during construction, or inspection is provided by a TSP.

CONSTRUCTION SPECIFICATION General Requirements MT-100-2

The owner/operator is responsible for marking private underground utilities (e.g.

propane and water lines) affected by the project. In addition to buried private utilities, there may be additional buried lines for such things as oil fields and the Air Force Missile Control System.

Known utilities are shown on the plan drawings. The NRCS makes no assurances or representation of the existence or non-existence of utilities.

The Utility Notification Center and the Montana NRCS have adopted the American Public Works Association Uniform Color Code for the purpose of marking specific utilities and avoiding confusion, particularly within road right-of-way. Pink and white are the colors designated for temporary survey markings and proposed excavation limits.

The Contractor and Owner/Operator shall respect and apply these colors during construction. Color code reservations are listed below:

PINK – Temporary Survey Markings WHITE – Proposed Limits or Routes RED – Electric Power YELLOW – Gas, Oil, Steam, Petroleum ORANGE – Communications BLUE – Potable Water GREEN – Sewers and Drains

4. PROJECT MODIFICATIONS

Project modifications to the plan drawings and specifications must be approved by the NRCS or TSP and the owner/operator prior to implementation. Differing site conditions, weather, materials, workmanship, value engineering proposals, or other issues may justify project modifications.

5. ENVIRONMENTAL

CONSIDERATIONS

Construction shall be carried out in a manner which minimizes water, land, and air pollution in compliance with Federal, State, and local laws and regulations. The owner/operator is responsible to secure all necessary permits prior to construction.

One or more permits may be applicable on a project. These permits may include, but are not limited to:

A. Montana Natural Streambed and Land Preservation Act (310)

B. Montana Stream Protection Act (SPA 124 Permit)

C. Montana Floodplain and Floodway Management Act (Floodplain Permit)

D. Federal Clean Water Act (Section 404 Permit)

E. Federal Rivers and Harbors Act (Section 10 Permit)

F. Short-Term Water Quality Standard for Turbidity (318 Authorization Permit)

G. Montana Land-Use License or Easement on Navigable Waters

H. Montana Water Use Act (Water Right Permit and Change Authorization)

I. Montana Water Use Act (Water Reservations)

J. Montana Point Discharge Elimination System (MPDES) Stormwater and Construction Dewatering Discharge Permits http://dnrc.mt.gov/Permits/StreamPermitting/NaturalStreambedLandPreservationAct.asp http://dnrc.mt.gov/Permits/StreamPermitting/NaturalStreambedLandPreservationAct.asp http://dnrc.mt.gov/Permits/StreamPermitting/StreamProtectionAct.asp http://dnrc.mt.gov/Permits/StreamPermitting/StreamProtectionAct.asp http://dnrc.mt.gov/Permits/StreamPermitting/FederalCleanWaterAct.asp http://dnrc.mt.gov/Permits/StreamPermitting/FederalCleanWaterAct.asp http://dnrc.mt.gov/Permits/StreamPermitting/FederalRiversAndHarborsAct.asp http://dnrc.mt.gov/Permits/StreamPermitting/FederalRiversAndHarborsAct.asp http://dnrc.mt.gov/Permits/StreamPermitting/ShortTermWaterQualityStandardTurbidity.asp http://dnrc.mt.gov/Permits/StreamPermitting/ShortTermWaterQualityStandardTurbidity.asp http://dnrc.mt.gov/Permits/StreamPermitting/lulEasementOnNavigableWaters.asp http://dnrc.mt.gov/Permits/StreamPermitting/lulEasementOnNavigableWaters.asp http://dnrc.mt.gov/Permits/StreamPermitting/WaterUseAct.asp http://dnrc.mt.gov/Permits/StreamPermitting/WaterUseAct.asp http://dnrc.mt.gov/Permits/StreamPermitting/WaterUseAct2.asp http://dnrc.mt.gov/Permits/StreamPermitting/WaterUseAct2.asp

CONSTRUCTION SPECIFICATION General Requirements MT-100-3

K. Montana Streamside Management Zone Law (SMZ)

L. Open Burning Permit.

These permits have similar information requirements and a “Joint Application Form” is available to process some of these applications.

The contractor is responsible for the identification of hazardous materials discovered during construction. The contractor shall immediately notify the NRCS and owner/operator of the presence of hazardous materials. The owner/operator is responsible for the proper handling and disposal of these materials.

6. CULTURAL RESOURCES

NRCS field personnel have reviewed the project area for cultural resources (archaeological and historic). However, the possibility exists for accidental discoveries during construction. If cultural material (cut or burned bones, fire cracked rocks, projectile points, foundations, fire hearths, etc.) is discovered by the contractor, owner/operator or NRCS technician, the work must stop. The NRCS technician shall contact the NRCS Cultural Resource Specialist for further instructions and establish the actions necessary to assess the cultural resources. Work shall not resume within 300 feet of the discovery until the owner/operator receives written notification from the NRCS technician. The notification may contain special provisions for protecting the cultural resource.

7. ADDITIONAL RESPONSIBILITIES

NRCS is responsible for technical certification of the project for USDA program payments. The NRCS shall conduct original and final quantity surveys and measurements. The data derived from these surveys and measurements shall be used to certify quantities for program payments.

The contractor, on behalf of the owner/operator, is responsible for scheduling an NRCS technician for periodic or continuous inspection of materials, workmanship, and quantities that facilitate technical certification of the project. For example, concrete shall not be poured until an NRCS technician has inspected the subgrade, steel reinforcement, and form dimensions. If an NRCS technician is unavailable during underground work, the contractor is responsible for leaving all or portions of underground work exposed to facilitate inspection.

The contractor is responsible for the construction staking and measurements from NRCS or TSP-established base lines and bench marks indicated on the plan drawings.

The NRCS or TSP may assist with construction staking and measurements.

The contractor or TSP is obligated to immediately notify the NRCS and owner/operator of construction problems in order to facilitate practical, functional, and cost-effective project modifications. These problems may be associated with differing site conditions, construction staking and measurements, conflicts between plan drawings and specifications, defective materials, or other issues.

8. REFERENCES

The following abbreviations will be used in the construction and material specifications to designate the organizations who publish the referenced "Standard Specifications":

ASTM American Society for Testing and Materials

AWWA American Water Works Association http://dnrc.mt.gov/Permits/StreamPermitting/StreamsideManagementZoneLaw.asp http://dnrc.mt.gov/Permits/StreamPermitting/StreamsideManagementZoneLaw.asp

CONSTRUCTION SPECIFICATION General Requirements MT-100-4

AWS American Welding Society

ACI American Concrete Institute

ANSI American National Standard Institute (American Society of Mechanical Engineers)

AASHTO American Association of State Highway and Transportation Officials

The following abbreviations are used to designate technical or regulatory agencies:

NRCS United States Department of Agriculture, Natural Resources Conservation Service

TSP Technical Service Provider

OSHA United States Department of Labor, Occupational Safety and Health Administration

EPA United States Environmental Protection Agency

CONSTRUCTION SPECIFICATION Pollution Control MT-102-1

USDA-NRCS-Montana February 2014

Pollution Control

1. SCOPE

The work shall consist of installing measures or performing work to control erosion and minimize the production of sediment and other pollutants to water and air during construction operations.

2. MATERIALS

All materials furnished shall meet the requirements in the Special Provisions.

3. EROSION AND SEDIMENT

CONTROL MEASURES AND

WORKS

The Contractor shall obtain a Montana Storm Water Discharge Permit (MPDES) from the Montana Department of Environmental Quality (DEQ) when areas of disturbance exceed 1 acre in size and pose a threat for discharge to State Waters. A permit is required in cases where potential water and sediment discharge can: a) occur across property boundaries, b) flow into public rights-of-way or c) enter channels with defined bank and streambed characteristics. A permit application requires development of a Storm Water Pollution Prevention Plan (SWPPP) and application fee.

Appropriate application of erosion and sediment control measures are specified as follows:

Staging of Earthwork Activities--The excavation and moving of soil materials shall be scheduled so as to minimize the size of areas disturbed and susceptible to erosion.

Seeding--Seedings to protect disturbed areas shall be done as specified on the drawings or in the Special Provisions.

Mulching--Mulching shall be used to provide temporary protection to soil surfaces from erosion.

Diversions--Diversions shall be used to divert water away from work areas, limit contribution of clean water to the site, control flow length and erosive nature of uncontrolled runoff, and/or to collect runoff from work areas for treatment and safe disposition.

Stream Crossings--Properly sized culverts or bridges shall be used where equipment must cross streams.

A 310 permit (Montana Natural Streambed and Land Preservation Act) shall be obtained from the local Conservation District when work results in ground disturbance within the high water mark of the stream.

Sediment Basins--Sediment basins shall be used to settle and filter out sediment from eroding areas in order to protect properties and streams below the construction site.

Sediment Filters--Straw bale filters, straw wattles, coconut rolls or geotextile sediment fences shall be used to trap sediment from areas of limited runoff. Straw bale filters and geotextile sediment fence shall be anchored into the ground a minimum of 6 inches in order to prevent erosion under or around them. Straw wattles and coconut rolls shall be set in the ground a minimum of 3 inches and staked according to manufacturers’ guidelines.

Waterways--Waterways shall be used for the safe disposal of runoff from fields, diversions and other structures or measures.

Other--Additional protection measures as specified in the Special Provisions or as required Federal, State, or local government regulations.

CONSTRUCTION SPECIFICATION Pollution Control MT-102-2

4. CHEMICAL POLLUTION

The Contractor shall provide watertight tanks or barrels or construct a sump sealed with plastic sheets to be used to dispose of chemical pollutants (such as drained lubricating or transmission fluids, greases, oils, soaps, asphalt, etc.) produced as a by-product of the project's work. Pollutants shall be disposed of without causing pollution and in accordance with appropriate State and Federal regulations.

Sanitary facilities such as pit toilets, chemical toilets, or septic tanks shall not be placed adjacent to live streams, wells, or springs. They shall be located at a distance sufficient to prevent contamination of any water sources. Facility contents shall be disposed of without causing pollution.

5. AIR POLLUTION

The burning of brush or slash or disposal of other materials shall adhere to State and local regulations.

Fire prevention measures shall be taken to prevent the start or the spreading of fires which result from construction activities.

Fire breaks or guards shall be constructed and maintained at locations shown on the drawings or as specified in the Special Provisions.

All public access or haul roads used by the contractor during construction of the project shall be sprinkled or otherwise treated to suppress dust. All dust control methods shall ensure safe construction operations at all times.