Concrete Gutter, Curb, Median, and Paved Ditch Art. 606.04 REMOVING CATCH BASINS TO MAINTAIN FLOW, or REMOVING INLETS TO MAINTAIN FLOW. The work of filling existing manholes, catch basins, and inlets will be paid for at the contract unit price per each for FILLING MANHOLES, FILLING CATCH BASINS or FILLING INLETS. SECTION 606. CONCRETE GUTTER, CURB, MEDIAN, AND PAVED DITCH
606.01 Description. This work shall consist of constructing concrete curb,
concrete gutter, combination concrete curb and gutter, concrete median, or paved ditch.
606.02 Materials. Materials shall be according to the following.
Item Article/Section
606.03 Equipment. Equipment shall be according to the following.
Item Article/Section
606.04 Excavation. The subgrade shall be excavated according to the cross
section shown on the plans. All unsuitable material shall be removed and replaced with suitable material, and the subgrade shall be compacted and finished to a firm, smooth surface. Art. 606.05 Concrete Gutter, Curb, Median, and Paved Ditch
606.05 Forms. Forms shall be securely staked, braced and held firmly to the
required line and grade, and shall be tight. All forms shall be cleaned and oiled before the concrete is placed against them. With the approval of the Engineer, a slipform machine may be used. If a slipform paver is used, the concrete slump shall be adjusted to meet the tolerances for the type of work being performed. Vertical faces may be battered at the rate of six percent from vertical to aid in slipform operations.
606.06 Placing Concrete. The improved subgrade shall extend to the back
of the curb. The subgrade and forms will be checked and approved by the Engineer before the concrete is placed. The subgrade shall be moistened prior to concrete placement. The concrete shall be thoroughly tamped and spaded or mechanically vibrated and finished smooth and even. Before the concrete is given the final finish, the surface of the curb, curb and gutter, gutter, or median will be checked with a 10 ft (3 m) straightedge, and any irregularities of more than 1/4 in. in 10 ft (6 mm in 3 m) shall be eliminated.
606.07 Concrete Gutter, Curb, and Curb and Gutter. Joints in concrete
gutter, curb, and combination curb and gutter shall be a continuation of the joints in the adjacent portland cement concrete pavement, base course, base course widening, or shoulder. Expansion joints adjacent to drainage castings may be placed in prolongation with other joint types. When concrete gutter, curb, and combination curb and gutter are constructed adjacent to flexible pavement or shoulders, joints shall be constructed according to the details shown on the plans. At points where the proposed or existing sidewalk or driveway pavement occupies the entire space between the proposed curb and an adjacent building or permanent structure, 1 in. (25 mm) preformed expansion joint shall be placed between the sidewalk, building, or driveway pavement and the proposed curb. The expansion joint material shall extend the entire depth of the sidewalk, or driveway pavement, or to such depth as will allow 1 in. (25 mm) expansion between the proposed curb and adjacent sidewalk, building or driveway pavement. Longitudinal construction, transverse contraction, and transverse expansion joints shall be constructed according to the applicable portions of Article 420.05. Contraction joints shall be sawed to a depth equal to 1/3 the thickness of the gutter flag and to a width of not less than 1/8 in. (3 mm). The expansion joint filler material shall be cut to the exact cross section of the gutter, curb, or combination curb and gutter. Dowel bars for expansion and contraction joints in combination concrete curb and gutter shall be spaced as shown on the plans, except only one dowel bar will be required at a joint if the width of the gutter is less than 18 in. (450 mm). Transverse contraction and longitudinal construction joints shall be sealed according to Article 420.12, except transverse joints in concrete curb and gutter shall be sealed with polysulfide or polyurethane joint sealant. When combination concrete curb and gutter is constructed across alleys or private drives, the top of curbs shall be depressed according to the details shown on the plans. The transition from full height curb to depressed curb shall be made in a Concrete Gutter, Curb, Median, and Paved Ditch Art. 606.09 distance equal to at least four times the difference in height from the full height to the depressed curb. Where HMA base course or base course widening is specified to extend under the curb and gutter, the curb and gutter may be poured full depth of the pavement in lieu of the base course. Areas of adjacent portland cement concrete pavement, base course, or base course widening less than 12 in. (300 mm) in width shall be constructed monolithically with the curb or combination curb and gutter. Areas of adjacent portland cement concrete pavement, base course, or base course widening greater than 12 in. (300 mm) in width may be constructed monolithically with the curb or combination curb and gutter. When monolithic construction is performed, the following shall apply.
606.08 Inlets, Entrances, and Outlets for Gutter and Curb and Gutter.
Inlets, entrances, and outlets for concrete gutter, and outlets for combination concrete curb and gutter shall be constructed according to the details shown on the plans. The longitudinal and transverse joints shall be according to Article 606.07. Pipe drains for outlets of the drop-box type shall be either corrugated steel or aluminum alloy pipe constructed according to the applicable portions of Section 601. The grates and covers shall be according to the applicable portions of Section 604.
606.09 Concrete Medians. Concrete medians shall be constructed at the
locations, of the types, and according to the details shown on the plans. For Type P surface median, grooves 1 in. (25 mm) deep shall be formed in the plastic concrete at 10 ft (3 m) maximum intervals both transversely and longitudinally. Grooves also shall be formed at the corner points of all holes boxed out for sign and signal posts. A 3/4 in. (19 mm) diameter plastic tube shall be installed through the back of the curb at 100 ft (30 m) intervals on the low side or sides of the median and two at the low end to provide drainage. Art. 606.09 Concrete Gutter, Curb, Median, and Paved Ditch Aggregate fill, when required under paved median, shall be gradation CA 7, CA 8, CA 11, CA 13, CA 14, CA 15, or CA 16 according to Article 1004.05 and shall be placed in layers 4 in. (100 mm) thick and compacted. Portland cement concrete pavement, base course, or base course widening less than 12 in. (300 mm) in width that is directly adjacent to concrete median shall be constructed monolithically with the median, but the area will be included in the measured area of the adjacent pavement, base course, or base course widening. The transverse joints in Type P surface median shall be expansion joints consisting of preformed expansion joint filler 3/4 in. (19 mm) thick, conforming to the full cross section of the median surface, and placed at intervals of 30 ft (9 m) in the median surface. At least one joint shall be constructed in each median island. For all other types of median when constructed adjacent to portland cement concrete pavement, base course, or base course widening, transverse joints shall be in prolongation with joints in the pavement, base course, or base course widening and shall be of the same type, except that dowel bars or tie bars will not be required. For corrugated medians, the Contractor has the option of constructing the joints with 3/4 in. (19 mm) preformed expansion joint filler conforming to the full cross section of the median. When constructed adjacent to flexible pavement, transverse joints shall be contraction joints at 20 ft (6 m) intervals. Contraction joints shall be formed by sawing to a depth of 1/3 the thickness of the median and sealed according to Article 420.12. Expansion joints shall be formed by placing 3/4 in. (19 mm) thick preformed expansion joint filler conforming to the full cross section of the median. When permitted by the Engineer, expansion joints may be substituted for contraction joints.
606.10 Paved Ditch. Paved ditch shall be constructed as shown on the
plans. Anchor walls shall be spaced at not more than 50 ft (15 m) intervals along the paved ditch. Anchor walls and the cut-off wall shall be constructed monolithically with the paved ditch. Welded wire fabric shall be 6 x 6 in. (150 x 150 mm) mesh, #4 gauge (5.74 mm), 58 lb (26 kg) per 100 sq ft (9 sq m) conforming to the requirements of AASHTO M 55 (M 55M). At the option of the Contractor, No. 3 (No. 10) reinforcing bars placed at 12 in. (300 mm) centers longitudinally in the paved ditch and vertically in the anchor and cut-off walls may be used in lieu of the welded wire reinforcement. A 1/2 in. (13 mm) thick preformed joint filler shall be placed at the junction of paved ditch with any other structure.
606.11 Finishing. All exposed surfaces shall be finished smooth and even,
and given a light brush finish while the concrete is still workable. The edges shall be rounded with approved finishing tools having the radii shown on the plans. Concrete Gutter, Curb, Median, and Paved Ditch Art. 606.15 Forms shall be removed within 24 hours after the concrete has been placed, and minor defects shall be filled with grout consisting of one part cement and two parts sand mixed with water.
606.12 Protective Coat. Protective coat, when required, shall be constructed
according to Article 420.18.
606.13 Backfill. After the concrete has obtained the specified strength, the
spaces in front and back of the construction shall be backfilled to the required elevation with suitable material, compacted, and neatly graded.
606.14 Method of Measurement. This work will be measured for payment as
follows.
Article 601 — 07. Tie bars will be measured according to Article 508.10.
606.15 Basis of Payment. Concrete gutter, curb, and combination curb and
gutter will be paid for at the contract unit price per foot (meter) for CONCRETE GUTTER, CONCRETE CURB or COMBINATION CONCRETE CURB AND GUTTER, of the type specified. Art. 607.01 Sluice Gate Concrete median will be paid for at the contract unit price per square foot (square meter) for CORRUGATED MEDIAN; CONCRETE MEDIAN SURFACE, 4 INCH (100 MM) or CONCRETE MEDIAN, of the type specified. For solid concrete median the unit price will also include concrete curb and gutter. Concrete inlets, entrances and outlets for gutter, and outlets for combination curb and gutter will be paid for at the contract unit price per cubic yard (cubic meter) for CLASS SI CONCRETE (OUTLET). Grates and grates and covers used with drop- box type outlets will be paid for according to Article 604.05. Pipe drains for drop-box type outlets will be paid for according to Article 601.08. Paved ditch will be paid for at the contract unit price per foot (meter) for PAVED DITCH, of the type specified. Protective coat will be paid for according to Article 420.20. Excavation required in the performance of the work will be measured and paid for according to Section 202. SECTION 607. SLUICE GATE
607.01 Description. This work shall consist of furnishing, fabricating,
transporting, and installing a sluice gate with all the necessary appurtenances.
607.02 Materials. Materials shall be according to AWWA C560 Section 4.3 -
Materials. CONSTRUCTION REQUIREMENTS
607.03 General. The sluice gate shall be constructed according to
AWWA C560 Section 4.4 - General Design and Section 4.5 - Manufacture. All wedges shall be provided with wedge adjusting screws and lock nuts. All manual floor stands shall be provided with clear butyrate plastic pipe covers with mylar position indicators. When required, a wall thimble shall be installed.
607.04 Painting. All cleaning, painting, and protecting of the sluice gate shall
be according to AWWA C560 Section 4.4.13 - Painting. A finish coat of black asphalt base coating shall be applied in the field to all submerged parts. The lifting device shall be painted with a machinery enamel suitable for outdoor service.
607.05 Installation. The sluice gate shall be installed and tested according to
AWWA C560 Section 4.6 - Installation and Field Testing.
607.06 Drawings and Manuals. Before any fabrication has begun, the
Contractor shall submit four complete sets of shop drawings to the Engineer for approval.
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