15-03 SAN20414 Technical Specs.pdf

CITY OF SAN ANGELO, TEXAS

TECHNICAL SPECIFICATIONS

FOR

LAKE NASWORTHY BOAT RAMP REPLACEMENTS

Brenda Gunter Mayor

COUNCIL MEMBERS

Tommy Hiebert Single Member District #1

Tom Thompson Single Member District #2

Harry Thomas Single Member District #3

Lucy Gonzales Single Member District #4

Karen Hesse Smith Single Member District #5

Larry Miller Single Member District #6

Daniel Valenzuela City Manager

JUNE 2023

PREPARED BY:

1500 BROADWAY STREET, SUITE 206

LUBBOCK, TX 79401

Phone - (806) 686-2700 Fax - (806) 686-2707

FIRM F-2144

SAN20414

6/23/2023

Table of Contents Page i

SAN20414 – Lake Nasworthy Boat Ramp Replacements

PART I –CITY STANDARD TRANSPORTATION TECHNICAL

SPECIFICATIONS

ITEM 100 – PREPARING RIGHT OF WAY

ITEM 107 – SEEDING FOR EROSION CONTROL

ITEM 110 – EXCAVATION

ITEM 132 – EMBANKMENT

ITEM 160 – FURNISHING AND PLACING TOPSOIL

ITEM 200 – SUBGRAGE PREPARATION

ITEM 210 – ROLLING (FLAT WHEEL)

ITEM 213 – ROLLING (PNEUMATIC TIRE)

ITEM 216 – ROLLING (PROOF)

ITEM 247 – FLEXIBLE BASE

ITEM 260 – LIME TREATMENT FOR MATERIALS USED AS SUBGRADE

ITEM 264 – LIME AND LIME SLURRY

ITEM 300 – ASPHALT OILS AND EMULSIONS

ITEM 301 – ASPHALT ANTISTRIPPING AGENTS

ITEM 302 – AGGREGATE FOR SURFACE TREATMENTS

ITEM 310 – ASPHALT PRIME COAT

ITEM 316 – SURFACE TREATMENT

ITEM 340 – HOT MIX ASPHALTIC CONCRETE PAVEMENT

ITEM 360 – CONCRETE PAVEMENT

ITEM 420 – CONCRETE STRUCTURES

ITEM 421 – PORTLAND CEMENT

ITEM 433 – JOINT SEALANTS

ITEM 437 – CONCRETE ADMIXTURES

ITEM 440 – REINFORCING STEEL

ITEM 529 – CONCRETE CURB, GUTTER AND COMBINED CURB AND GUTTER

ITEM 531 – SIDEWALKS

Table of Contents Page ii

PART II–CITY STANDARD UTILITIES TECHNICAL

ITEM 4.14 – SERVICE LINES ......................................................................................................................................... 4.14

ITEM 4.17 – WATER METER CHANGE OUT ........................................................................................................... 4.17

Table of Contents Page iii

PART III–TEXAS DEPARTMENT OF TRANSPORTATION

ITEM 104 – REMOVING CONCRETE

ITEM 105 – REMOVING TEATED AND UNTREATED BASE AND ASPHALT PAVEMENT

ITEM 432 – RIPRAP

ITEM 500 – MOBILIZATION

ITEM 506 – TEMPORARY EROSION, SEDIMENTATION, AND ENVIRONMENTAL CONTROLS

ITEM 636 – SIGNS

ITEM 644 – SMALL ROADSIDE SIGN ASSEMBLIES

DMS6200 – FILTER FABRIC

Table of Contents Page iv

PART IV–OTHER SPECIFICATIONS

DIV 10.14.00 – SITE SIGNAGE ............................................................................................................................. 10.14.00

DIV 31.23.19.01 – CARE OF WATER DURING CONSTRUCTION ...................................................... 31.23.19.01

DIV 32.17.23 – PAVEMENT MARKING ............................................................................................................. 32.17.23

Table of Contents Page v

APPENDIX

APPENDIX A – CITY OF SAN ANGELO APPROVED MATERIALS AND MANUFACTURERS FOR WATER

AND SEWER

PREPARING RIGHT-OF-WAY ITEM 100

100 - 1 REV JAN08

CITY OF SAN ANGELO

ITEM 100

PREPARING RIGHT-OF-WAY

100.1. DESCRIPTION.

This Item shall govern the clearing and grubbing for the preparation of the Right-of-Way for construction operations by the removal and disposal of all obstructions from the Right-of-Way and from designated easements, where removal of all such obstructions is not otherwise shown on the

Plans and specifications.

Such obstructions shall be considered to include remains of houses, foundations, floor slabs, concrete, brick, lumber, plaster, septic tank drain fields, basements, abandoned utility pipes or conduits, equipment, fences, retaining walls, outhouses, and shacks.

This Item shall also include the removal of trees and shrubs and other landscape features not designated for preservation, stumps, brush, roots, vegetation, logs, curb and gutter, driveways, paved parking areas, miscellaneous stone, sidewalks, drainage structures, manholes, inlets, abandoned railroad tracks, scrap iron and debris, whether above or below ground except live utility facilities.

100.2. CONSTRUCTION METHODS.

(1) General. All areas as shown on the Plans, shall be cleared of all structures and obstructions as defined above. Those trees, shrubs and other landscape features specifically designated by the

City for preservation shall be carefully protected from abuse, marring, or damage during construction operations. Continual parking and/or servicing of equipment under the branches of trees marked for preservation will not be permitted. When trees and shrubs are designated for preservation and require pruning, they shall be trimmed as directed by the City and all exposed cuts over two (2) inches in diameter shall be treated with a material approved by the City.

Culverts, storm sewers, manholes and inlets shall be removed in proper sequence for maintenance of traffic and drainage.

Underground obstructions, except those items designated for preservation, shall be removed to the following depths:

(a) In areas to receive embankment: one (1) foot below natural ground, except when permitted by the Plans, trees and stumps may be cut off as close to natural ground as practicable on areas which are to be covered by at least three (3) feet of embankment.

(b) In areas to be excavated: one (1) foot below the low elevation of the excavation.

(c) All other areas: one (1) foot below natural ground.

ITEM 100 CLEARING AND GRUBBING

100 - 2 REV JAN08

(2) Disposal of Material. Unless otherwise shown herein, all materials and debris removed shall become the property of the Contractor, including all merchantable timber, and shall be removed from the Right-of-Way and disposed of in a manner satisfactory to the City, except that gravel, brick, stone, or broken concrete, when approved by the City, may be used in the roadway embankment. This material shall conform to the requirements of Item 132, “Embankment”.

(a) State or National Forest or Park: The provisions shown on the Plans for removal of the timber shall apply. No timber shall be cut or defaced outside of the Right-of-Way lines or material pit limits as indicated on the Plans or by the City.

(b) Burning of Brush: When burning of brush is permitted under applicable laws and by the City, the following shall govern.

(i) Where construction is on new location, the brush shall be piled and burned in the center of the work area.

(ii) When a portion of the project falls within the limits of a state or National Forest or

Park, the Contractor shall notify the responsible agencies prior to any burning.

(3) Backfill. Holes remaining after removal of all obstructions, objectionable material, trees, stumps, etc., shall be backfilled with approved material, compacted and restored to approximately its original contours by blading, bulldozing, or by other methods, as approved by the City. In areas to be immediately excavated, the backfilling of holes may not be required when approved by the

City.

Before backfilling, the remaining ends of all abandoned storm sewers, culverts, conduits, and water or gas pipes over 3 inches in diameter, shall be plugged with an adequate quantity of concrete to form a tight closure.

100.3 MEASUREMENT.

(1) Methods of Measurement. This Item will be measured by one of the following methods:

(a) Preparing Right-of-Way (Acre). The work performed will be measured by the by the nearest tenth of an acre of Right-of-Way as shown on the Plans.

(b) Preparing Right-of-Way (Station). The work performed will be measured by the “100-

Foot Station” regardless of the width of the Right-of-Way as shown on the Plans.

(c) Preparing Right-of-Way (Tree). The work performed will be measured by each tree removed of the diameter specified.

(2) General. Measurement for payment for “Preparing Right-of-Way (Acre)” and for “Preparing

Right-of-Way (Station)” will be made only on areas indicated and classified on the Plans as

“Preparing Right-of-Way”. Work required by the City on additional areas (such as additional

Right-of-Way, additional cut and embankment areas, etc.) shall be measured as specified above.

Areas other than those set forth above will not be measured for payment.

PREPARING RIGHT-OF-WAY ITEM 100

100 - 3 REV JAN08

100.4. PAYMENT.

The work performed and material furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Preparing Right-of-Way,” and/or

“Preparing Right-of-Way (Trees)” of the diameter specified. This price shall be full compensation for trimming designated trees and shrubs; for removal and disposal of all obstructions and debris; for backfilling all holes; for furnishing and placing all concrete for plugs; for restoring areas to original condition; and for all labor, equipment, tools and incidentals necessary to complete the work.

All work performed in areas not so designated on the Plans as “Preparing Right-of-Way,” except

“additional areas” as defined under “Measurement” or specifically covered otherwise, will not be paid for directly but shall be considered as subsidiary work pertaining to the various bid items.

The total payment for this Item will not exceed ten (10) percent of the original contract amount until after the completion of the entire contract work to the satisfaction of the City. That portion of the contract amount for this Item in excess of ten (10) percent of the total contract amount will then be paid on the next estimate after the work is accepted and after the partial release of retainage.

SEEDING FOR EROSION CONTROL ITEM 107

Rev JAN08 107-1

CITY OF SAN ANGELO

ITEM 107

SEEDING FOR EROSION CONTROL

107.1 DESCRIPTION.

Seeding for Erosion Control shall consist of preparing the areas, providing for sowing of seeds, mulching with straw, hay or cellulose fiber and other management practices for the cut slopes and for the bottom of the channel detention pond area, embankments, dikes, beams and the other areas as shown on the Plans or as directed by the City excluding the rock surface in accordance with these specifications.

107.2 SEEDS.

All seeds shall meet the requirements of the Texas Seed Law including the labeling requirements for showing pure live seed, name and type of seed.

The pure live seed mixture shall consist of the following seeds in the amount noted per acre of planting area.

Green Sprangletop - 1.2 lbs.

Common Bermuda - 8.0 lbs.

Klien - 1.0 lbs.

Perennial Rye - 2.0 lbs.

Fertilizer, if specified on the Plans, shall be delivered in bags or containers clearly labeled showing the analysis. The fertilizer, if requested by the City, will be subject to testing by the Texas

Department of Agriculture in accordance with the Texas Fertilizer Law. A pelleted or granulated fertilizer shall be used which has the analysis shown on the Plans. The rate of application shall be as shown on the Plans.

Straw mulch shall be oat, wheat, or rice straw. Hay mulch shall be prairie grass, Bermuda grass or other acceptable hay. The mulch shall be free of noxious weeds and foreign materials. It shall be kept in a dry condition and shall not be molded or rooted.

107.3 CONSTRUCTION METHODS.

After the areas designated for seeding are cut to the lines, grades, cross sections and to the configurations shown on the Plans, the area shall be cultivated to a depth of at least four inches.

The seed bed shall be cultivated sufficiently to reduce the soil to a state of good tilth for proper germination of the grass seeds. The cross-section and configuration previously established shall be maintained throughout the process of cultivation and any necessary reshaping shall be done prior to planting of the seeds.

ITEM 107 SEEDING FOR EROSION CONTROL

Rev JAN08 107-2

The seed mixture shall be uniformly distributed over the areas shown on the Plans or where directed by the City by the mechanical equipment. Seed and fertilizer (if called on the Plans) may be distributed at the same time provided that each component is uniformly applied at the specified rate. After planting, the planted area shall be rolled with corrugated roller of the

“cultipacker” type. All rolling of the slope areas shall be on the contours. For areas smaller than half an acre, sowing of seeds by hand will be permitted. If sown by hand, the seeds shall be sown in two (2) directions at right angles to each other. Upon completion of planting of the seeds, straw or hay mulch shall be spread uniformly over the seeded area at the rate of approximately one half (1/2) to two (2) tons of hay or two (2) to two and a half tons (2 1/2)of straw per acre. The Contractor in lieu of placing the mulch by hand may use a mulching machine to shoot the mulch over the seeded area. If permitted by the City, cellulose fiber may be used in place of straw or hay mulch. The application rate for cellulose fiber as mulch shall be a minimum of twenty five hundred (2,500) lbs. per acre of area with flat surface and minimum of three thousand (3,000) lbs. per acre of area with sloped surfaces (greater than 10 percent).

Water shall be free of industrial wastes and other objectionable material. Water source to be approved by the City.

The criterion for acceptance of the work under this Item is “Good Stand of Grass.” The “Good

Stand of Grass” is defined as a minimum of one-half (1/2) inch of well established live grass covering at least 75 percent of the area designated for seeding. If it is necessary, the bald spots in the seeded area shall be selectively reseeded at the direction of the City.

107.4 METHOD OF MEASUREMENT.

The work performed in accordance with the specifications described herein will be measured by the acres, complete in place.

107.5 PAYMENT.

The work performed, materials furnished and measured will be paid for at the unit price bid for

“Seeding for Erosion Control” which shall be full compensation for furnishing all materials and for performing all operations necessary to complete the work in an acceptable manner.

If the Contractor were to fail to provide the requirements of this Item as specified herein, the Owner shall reserve the right to engage another Contractor to complete the work and the cost thereof shall be deducted from monies payable to the Contractor for this Item.

EXCAVATION ITEM 110

Rev JAN08 110-1

CITY OF SAN ANGELO

ITEM 110

EXCAVATION

110.1. DESCRIPTION.

This Item shall govern for the roadway, channel and/or special excavation of the required material in the areas shown on the Plans and cross sections to the lines, grades, and typical sections as specified. Excavation shall include all materials encountered regardless of their nature or of the manner in which they are removed.

110.2. CONSTRUCTION METHODS.

All excavation shall be performed as specified herein and the completed roadway and/or channels shall conform to the alignment, grades, and typical sections as shown on the Plans or project cross sections or as established by the City.

Unsuitable excavation and excavation in excess of that needed for construction shall be known as

“Waste” and shall become the property of the Contractor to be disposed of by him outside the limits of the right-of-way at a location approved by the City. Unsuitable material encountered below subgrade elevation in roadway cuts, when declared “Waste” by the City, shall be replaced with material from the roadway excavation or with other suitable material as approved by the City.

This work shall be done in accordance with the provisions of the applicable bid items.

When excavated materials, including topsoil, are utilized in constructing the required roadway sections, payment of replacement will be made under the pertinent placement specification.

During construction the roadbed and ditches shall be maintained in such condition as to insure proper drainage at all times. Ditches and channels shall be so constructed and maintained as to avoid damage to the roadway section. During construction, channels shall be kept drained, insofar as practicable, and the work shall be prosecuted in a neat and workmanlike manner.

All slopes shall be accurately shaped, and care shall be taken that no material is loosened below or outside the required slopes. Exceptions shall be those slopes in rock or other material where, in the judgment of the City, some variation may be permitted. All breakage and slides shall be removed and disposed of in a manner acceptable to the City.

(1) Rock Cuts. The Contractor shall have the following options:

(a) Nonhomogeneous Rocks:

(i) Excavate to finish subgrade elevation, manipulate and compact the subgrade in accordance with Section 132.3.(3).(a) without removal.

(ii) Excavate below grade (undercutting) and replace with embankment material approved by the City. Compaction shall be in accordance with Section 132.3.(3).(a).

EXCAVATION ITEM 110

Rev JAN08 110-2

(b) Homogeneous Rock.

(i) Excavate to finish subgrade elevation.

(ii) Excavate to finish subgrade elevation, manipulate and compact the subgrade in accordance with Section 132.3.(3).(a) without removal.

(iii) Excavate below grade (undercutting) and replace with embankment material, limestone base material, or other material approved by the City. Compaction shall be in accordance with Section 132.3(3).(a).

(2) Earth Cuts. When base and/or pavement structure is placed under this project, all earth cuts shall be scarified to a uniform depth of at least six inches below the required finished subgrade elevation for the entire roadbed width. The material shall be mixed and reshaped by blading and then sprinkled and rolled in accordance with Section 132.3.(3).(a) or as shown on the Plans.

(3) Subgrade Tolerances. Tolerances shall be as follows:

(a) Stage Construction. Any deviation in excess of 0.1 foot in cross section and 0.1 foot in 16 feet measured longitudinally shall be corrected by loosening, adding or removing the material, reshaping and recompacting by sprinkling and rolling.

(b) Turn Key Construction. Any deviation in excess of half inch in cross section and half inch in 16 feet measured longitudinally shall be corrected by loosening, adding or removing the material, reshaping and recompacting by sprinkling and rolling.

110.3. MEASUREMENT.

This Item will be measured by the cubic yard in its original position as computed by the method of average end areas.

This is a Plans quantity measurement Item and the quantity to be paid for will be that quantity shown in the proposal and on the “Estimate and Quantity” sheet of the contract Plans, except as may be modified by special condition. If no adjustment of quantities is required, additional measurements or calculations will not be required.

Shrinkage or swellage factors will not be considered in determining the calculated quantities.

110.4. PAYMENT.

The work performed and materials furnished in accordance with the Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Excavation (Roadway),”

“Excavation (Channel).” “Excavation (Special)” or “Excavation (Roadway and Channel).” This price shall be full compensation for all authorized excavation; for the undercutting subgrade and reworking or replacing the undercut material; for all hauling; for all work required for disposal of material not used elsewhere on the project and for furnishing all labor, materials, tools, equipment and incidentals necessary to complete the work.

EMBANKMENT ITEM 132

Rev JAN08 132-1

CITY OF SAN ANGELO

ITEM 132

EMBANKMENT

132.1 DESCRIPTION.

This Item shall govern for the placement and compaction of all materials necessary for the construction of roadway embankments, levees, and dykes or any designated section of the roadway where additional material is required.

132.2 MATERIAL.

Materials may be furnished from required excavation in the areas shown in the Plans or from off right-of-way sources obtained by the Contractor and meeting the requirements herein. All embankment shall consist of suitable earth material such as rock, loam, clay, or other such materials as approved by the City that will form a stable embankment.

132.3 CONSTRUCTION METHODS.

(1) General. Prior to placing any embankment, all work in accordance with Part II – Construction

Details, Item 100, “Prepare Right-of-Way”, shall have been completed on the areas over which the embankment is to be placed. Stump holes or other small excavation in the limits of the embankments shall be backfilled with suitable material and thoroughly tamped by approved methods before commencing embankment construction. The surface of the ground, including disk-loosened ground or any surface roughened by small washes or otherwise, shall be restored to approximately its original slope by blading or other methods. Where shown on the Plans or required by the City, the ground surface thus prepared shall be compacted by sprinkling and rolling.

The City shall be notified sufficiently in advance of opening any material source to allow performance of any required testing.

Unless otherwise shown on the Plans, the surfaces of unpaved areas (except rock) which are to receive embankment shall be loosened by scarifying to a depth of at least six inches. Hillsides shall be cut into steps before embankment materials are placed. Placement of embankment materials shall begin at the low side of hillside and slopes. Materials which have been loosened shall be recompacted simultaneously with the new embankment materials placed upon it. The total depth of loosened and new materials shall not exceed the permissible depth of the layer to be compacted.

Trees, stumps, roots, vegetation or other unsuitable materials shall not be placed in embankment.

Unless otherwise shown on the Plans, all embankments shall be constructed in layers approximately parallel to the finished grade of the roadbed.

Rev JAN08 132-2

Embankments shall be constructed to the grade sections shown on the Plans or as established by the City. Each section of the embankment shall correspond to the detailed section or slopes established by the City. After completion of the roadway, it shall be continuously maintained to its finished section and grade until the project is accepted.

(2) Constructing Embankments.

(a) Earth Embankments: Earth embankments shall be defined as those composed principally of material other than rock, and shall be constructed of acceptable material from approved sources.

Unless otherwise specified, earth embankments shall be constructed in successive layers for the full width of the individual roadway cross section and in such lengths as are best suited to the sprinkling and compacting methods utilized.

Layers of embankment may be formed by utilizing equipment and methods which will evenly distribute the material.

A minor quantity of rock or broken concrete encountered in the construction of this project may be incorporated in the lower layers of the embankment if acceptable to the City. Or, it may be placed in the deeper fills, in accordance with the requirements for the construction of rock embankments, provided such placement of rock is not immediately adjacent to structures or in areas where bridge foundations are to be constructed. Also, rock or broken concrete may be placed in the portions of embankments outside the limits of the completed roadbed width where the size of the rock or broken concrete prohibits its incorporation in the normal embankment layers. All exposed reinforced steel shall be cut and removed from the broken concrete.

Each layer of embankment shall be uniform as to material, density and moisture content before beginning compaction. Where layers of unlike materials abut each other, each layer shall be featheredged for at least 100 feet, or the material shall be so mixed as to prevent abrupt changes in the soil. No material placed in the embankment by dumping in a pile or windrow shall be incorporated in a layer in that position, but all such piles or windrows shall be moved by blading or similar methods. Clods or lumps of material shall be broken and the embankment material mixed by blading, harrowing, disking or similar methods until a uniform material of uniform density is achieved in each layer.

It shall be the responsibility of the Contractor to secure a uniform moisture content throughout the layer by such methods as may be necessary.

(b) Embankment Adjacent to Culverts: As a general practice, embankment material placed adjacent to any portion of any structure and in the first two (2) layers above the top of any culvert or similar structure shall be free of any appreciable amount of gravel or stone particles more than four inches in greatest dimension and of such gradation as to permit thorough compaction. When, in the opinion of the City, such material is not readily available, the use of rock or gravel mixed with earth will be permitted, in which case no particle larger than 12 inches in greatest dimension and six (6) inches in least dimension may be used. The percentage of fines shall be sufficient to fill all voids and insure a uniform and thoroughly compacted mass of proper density.

Rev JAN08 132-3

(3) Compaction Method. Compaction of embankments shall be by “Ordinary Compaction” or

“Density Control” as shown on the Plans.

(a) Ordinary Compaction. When “Ordinary Compaction” is shown on the Plans, the following provisions shall govern:

Each layer shall not exceed eight (8) inches of loose depth, unless otherwise directed by the City.

Each layer shall be compacted in accordance with the provisions governing the Item or Items of

“Rolling”. Unless otherwise specified on the Plans, the rolling equipment shall be as approved by the City. Compaction shall continue until there is no evidence of further compaction. Prior to and in conjunction with the rolling operation, each layer shall be brought to the moisture content directed by the City, and shall be kept leveled with suitable equipment to insure uniform compaction over the entire layer. Should the subgrade, for any reason or cause, lose the required stability or finish, it shall be recompacted and finished at the Contractor's expense.

(b) Density Control. When “Density Control” is shown on the Plans, the following provisions shall apply:

Each layer shall be compacted to the required density by any method, type and size of equipment which will give the required compaction. The depth of layers, prior to compaction, shall depend upon the type of sprinkling, mixing and compacting equipment used. However, maximum depth

(16 inches loose and 12 inches compacted) shall not be exceeded unless approved by the City.

Prior to and in conjunction with the rolling operation, each layer shall be brought to the moisture content necessary to obtain the required density and shall be kept leveled with suitable equipment to insure uniform compaction over the entire layer.

Each layer shall be sprinkled and compacted to the extent necessary to provide the density specified below, unless otherwise shown on the Plans.

DESCRIPTION DENSITY, PERCENT MOISTURE

Non-Swelling Soils with plasticity index less than 20 Not less than 95 +/- 2% of optimum

Swelling soils with plasticity index of 20 to 35 Not less than 95 +/- 2% of optimum

Swelling soils with plasticity index over

Not less than 95 +/- 2% of optimum

The density determination will be made in accordance with Test Method Tex-114-E / ASTM D 698.

Field density determination by nuclear gage will be made in accordance with Test Method

Tex-115-E / ASTM D 2922 for field density and ASTM D 3017 for moisture content.

After each layer of earth embankment is complete, tests as necessary may be made by the City.

When the material fails to meet the density requirements or should the material lose the required stability, density, moisture or finish before the next course is placed or the project is accepted, the

Rev JAN08 132-4 layer shall be reworked as necessary to obtain the specified compaction, and the compaction method shall be altered on subsequent work to obtain specified density. Such procedure shall be subject to the approval of the City.

Excessive loss of moisture shall be construed to exist when the subgrade soil moisture content is four percent less than the optimum.

The Contractor may be required to remove a small area of the layer in order to facilitate the taking of density tests. Replacement and compaction of the removed material in the small area shall be at the Contractor's expense.

132.4 TOLERANCES.

The tolerances shall be as follows:

(1) Grade Tolerances.

(a) Stage Construction: Any deviation in excess of 0.1 foot in cross section and 0.1 foot in 16 feet measured longitudinally shall be corrected by loosening, adding or removing the material, reshaping and recompacting by sprinkling and rolling.

(b) Turnkey Construction: Any deviation in excess of 1/2 inch in cross section and

1/2 inch in 16 feet measured longitudinally shall be corrected by loosening, adding or removing the material, reshaping and recompacting by sprinkling and rolling.

(2) Density Tolerances. The City may accept the work provided not more than one out of the most recent three (3) density tests performed is outside the specified density and provided that the failing test is no more than three (3) pounds per cubic foot outside the specified density.

132.5. MEASUREMENT.

This Item will be measured as follows:

(1) General. Shrinkage or swellage factors will not be considered in determining the calculated quantities.

(2) Class 1. Embankment will be measured in its original, natural position, and the volume computed in cubic yards by the method of average end area.

(3) Class 2. Embankment will be measured by the cubic yard in vehicles as delivered on the road.

(4) Class 3. Is a Plans quantity measurement Item and the quantity to be paid for will be that quantity shown in the proposal and on the “Estimate and Quantity” sheet of the contract Plans, except as may be modified by General Note. If no adjustment of quantities is required, additional measurements or calculations will not be required.

Rev JAN08 132-5

132.6. PAYMENT.

The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Embankment”, of the compaction method, type and class specified. This price shall be full compensation for furnishing embankment; for hauling; for placing, compacting, finishing and reworking; and for all labor, royalty, tools, equipment and incidentals necessary to complete the work.

When “Ordinary Compaction” is shown on the Plans, all sprinkling and rolling will not be paid for directly, but will be considered subsidiary to this Item, unless shown on the Plans.

When “Density Control” is shown on the Plans, all sprinkling and rolling will be considered subsidiary to this Item.

When subgrade is constructed under this project, correction of soft spots in the subgrade will be at the Contractor's expense.

FURNISHING AND PLACING TOPSOIL ITEM 160

Rev JAN08 160-1

CITY OF SAN ANGELO

ITEM 160

FURNISHING AND PLACING TOPSOIL

160.1 DESCRIPTION.

This Item shall govern for the furnishing and placing of approved topsoil to the depths and area shown on the Plans or as directed by the City.

160.2 MATERIALS.

(1) Topsoil. The topsoil shall be fertile soil, be easily cultivated, be free from objectionable material, have a relatively high erosion resistance and be readily able to support the growth of planting, seeding or sodding.

(2) Water. Water shall be free of industrial wastes and other objectionable material. Water source to be approved by the City.

160.3 SOURCES.

The topsoil may be obtained from the right-of-way at sites of proposed excavation or embankment when shown on the Plans or designated by the City.

The approximate quantity of acceptable topsoil to be salvaged from the project will be shown on the Plans. The topsoil may also be obtained from approved sources, which are outside of the right-of-way and have been secured by the Contractor.

160.4 CONSTRUCTION METHODS.

Any trash, wood, brush, stumps or other objectionable materials encountered at the source shall be removed and disposed of as approved by the City prior to beginning of work required by this

Item. The source and stockpile areas shall be kept drained, insofar as practicable, during the period of topsoil removal. The source and stockpile areas shall be left in a neat and presentable condition upon completion of the removal of all material required.

The placement of the topsoil shall be undertaken as soon as the grading operations have been completed or at such time as specified by the City. The topsoil shall be spread so as to form a cover of uniform thickness (loose) as shown on the Plans. After the topsoil has been placed and shaped, it shall be sprinkled and/or rolled if directed by the City. Rolling shall be performed with a light corrugated drum roller of the type approved by the City.

(1) Right-of-Way Sources. The existing topsoil shall be moved from within the limits of construction as shown on the Plans and stockpiled in a windrow along the right-of-way line, or at designated locations. It also may be spread over an area that is ready for topsoil application in accordance with the Plans or as directed by the City.

Rev JAN08 160-2

(2) Contractor-Obtained Sources. The Contractor shall notify the City sufficiently in advance of the opening of any material source to permit inspection of the site and to prepare for any necessary measurement. Only material, which meets the approval of the City, shall be utilized.

160.5 MEASUREMENT.

This Item will be measured by one of the following methods as shown on the Plans.

When Class 1 measurement is specified, topsoil will be measured by the 100-foot station as measured along the baseline of each roadbed.

When Class 2 measurement is specified, topsoil will be measured by the square yard complete in place.

When Class 3 measurement is specified, topsoil will be measured by the cubic yard in vehicles at the point of delivery.

When Class 4 measurement is specified, topsoil will be measured in the stockpile and the volume computed in cubic yards by the method of average end areas.

When Class 5 measurement is specified, topsoil will be measured in its original position at the source and the volume computed in cubic yards by the method of average end areas.

160.6 PAYMENT.

The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Furnishing and placing

Topsoil” of the class and depth specified. This price shall be full compensation for securing any necessary source(s) and any royalty involved; for furnishing all materials, for all excavation, loading, hauling, stockpiling and placing; and for furnishing all labor, tools, equipment and incidentals necessary to complete the work.

“Rolling” and “Sprinkling” will not be paid for directly, but will be considered subsidiary to this

Item, unless otherwise shown on the Plans.

Payment will not be made for any material, which is used for purposes other than, that which is required by this Item.

Excavation required by this Item in cut sections will be measured and paid for in accordance with the provisions of the various excavation items involved, with the provision that excavation will be measured and paid for once only, regardless of the manipulations involved.

Excavation which will be paid for directly, in accordance with the various excavation Items involved, will include the original in-place volume of topsoil salvaged from cut sections, as well as the additional volume of excavation made necessary for placing the topsoil, in cut areas.

Excavation, for topsoil, in areas upon which embankment will be placed will neither be measured nor paid for directly; its cost will be included in the unit price bid for this Item. The foregoing provisions are depicted in Figure 1.

Rev JAN08 160-3

Figure 1

Roadway Cross Sections Showing Payment for

Excavation and Embankment

SUBGRADE PREPARATION Item 200

Rev JAN08

200-1

CITY OF SAN ANGELO

ITEM 200

SUBGRADE PREPARATION

200.1 DESCRIPTION.

This Item shall govern the scarifying, blading, and rolling of the subgrade to obtain uniform texture and density throughout the required depth as shown on the Plans.

200.2 TESTING.

The subgrade under areas to be paved shall be compacted to a minimum depth of 8 inches and to a density of not less than 95 percent for cohesive soils or 100 percent for noncohesive soils of the maximum density as determined by Test Method Tex-114-E / ASTM D 698. Noncohesive soils, for the purpose of determining compaction control, are those with a plasticity index (PI) of less than 6. The material to be compacted shall be within +/- 2 percent of optimum moisture content before rolled to obtain the prescribed compaction (except for expansive soils).

Field density determination will be made in accordance with Test Method Tex-115-E / ASTM D

2922 for field density and ASTM D 3017 for moisture content using a nuclear gage. If nuclear gages are to be used for density determination, the machines shall be calibrated in accordance with

ASTM D 2922 using blocks of materials with densities that extend through a range representative of the density of the proposed embankment material.

Compaction is to be tested for density and moisture content acceptance as per Detail S-EE-1.

AASHTO T99 or T-180 (Moisture-Density) is required for soils that have more than 30 percent retained on the 3/4-inch sieve. The moisture-density relationship test procedures ASTM D 698 and D1557 are not applicable for materials with greater than 30 percent retained on the 3/4-inch sieve. A replacement procedure (ASTM D 4718) for the coarse material (greater than 3/4-inch) is used with ASTM methods but only until up to 30 percent is retained. Maximum density testing

(ASTM D 4253) may be used but it also limits the material retained on the 1-1/2-inch sieve to

30 percent. The AASHTO T-99 and T-180 are similar to ASTM D 698 and D 1557, except they do not limit the replacement of the coarse material.

Stones or rock fragments larger than 4 inches (100 mm) in their greatest dimension will not be permitted in the top 6 inches (150 mm) of the subgrade. The finished grading operations, conforming to the typical cross section, shall be completed and maintained at least 1,000 feet

(300 m) ahead of the paving operations or as directed by the City.

200-2

200.3 CONSTRUCTION METHODS.

The roadbed or parking lot subgrade, as case may be, shall be excavated and shaped in conformity with the typical sections shown on the Plans and to the lines and grades established by the City. All unstable or otherwise objectionable material shall be removed or otherwise broken off to a depth of not less than six (6) inches below the surface of the subgrade. Holes or depressions resulting from the removal of such material shall be backfilled with suitable material compacted in layers not to exceed six (6) inches. All soft and unstable material and other portions of the subgrade, which will not compact readily or serve the intended purpose, shall be removed as directed. No direct payment will be made for such removal.

The subgrade shall be scarified to the depth shown on the Plans, then bladed and compacted in the manner outlined in the following paragraph, “Finishing and Compaction”. The surface of the subgrade shall be finished to line and grade as established, and be in conformity with the typical sections shown on the Plans. Any deviation in excess of one-half (1/2) inch in cross section and in a length of sixteen feet measured longitudinally shall be corrected by loosening, adding or removing material, reshaping and compacting by sprinkling and rolling. Material excavated in the preparation of the subgrade shall be disposed in a manner acceptable to the City.

200.4 FINISHING AND COMPACTION.

The subgrade course, including an area one foot back of the proposed curb line, or as the case may be, shall be sprinkled as required and rolled as directed until a uniform compaction and the required density is obtained. Compaction of the subgrade may be done using any of the rolling equipment acceptable to the City. Rolling shall continue until the subgrade has been compacted to the required testing minimums per Section 200.2.

Tests will be made at the times and locations selected by the City. Notification will be a minimum of

24 hours.

Rolling shall progress gradually from the sides to the center of the lane under construction by lapping uniformly each preceding tract by at least 12 inches.

After rolling and watering, the subgrade shall be checked by the use of string line or instrument and all portions that do not conform to the lines and grades as shown on the Plans shall be scarified for at least six (6) inches, corrected and recompacted to correct elevations.

Until the base course or pavement is placed, the subgrade shall be maintained free from cuts and depressions, in a smooth and compacted condition true to lines and grade and to the density requirements contained herein. All of the Contractor's hauling and other equipment used in such a way as to cause rutting and raveling of the subgrade shall either be removed from the work or suitable run-ways or other equivalent means shall be provided to prevent rutting.

The Contractor shall be responsible for maintaining and protecting the roadbed or the parking lot subgrade, as the case may be, for the entire length of the project.

200-3

During construction, grading of the subgrade shall be conducted so that berms of earth or other material do not substantially impede the flow of storm waters. Ditches and drains along the subgrade shall be maintained so as to drain effectively.

200.5. MEASUREMENT.

The subgrade preparation will be measured by the number of square yards of subgrade prepared and accepted by the Owner.

200.6. PAYMENT.

The amount of subgrade area measured as outlined under “Measurement” will be paid for at a unit price bid for this Item which will be full compensation for removing excess material, shaping, fine grading and compacting the subgrade; for furnishing and hauling all materials, blading and finishing and all labor, tools and incidentals necessary to complete the work.

ROLLING (FLAT WHEEL) ITEM 210

Rev JAN08 210-1

CITY OF SAN ANGELO

ITEM 210

ROLLING (FLAT WHEEL)

210.1 DESCRIPTION.

This Item shall govern for the compaction of embankment, flexible base, or surface treatments, by the operation of approved power rollers as herein specified and as directed by the City.

210.2 EQUIPMENT.

(1) Embankments and Flexible Bases. Power rollers shall be of the three-wheel, self-propelled type, weighing not less than ten (10) tons and shall provide compression on the rear wheels of not less than 325 pounds per linear inch of tire width. All wheels shall be flat; the rear wheels shall have a diameter of not less than 48 inches, and each shall have a tire width of not less than 20 inches.

210.3 CONSTRUCTION METHODS.

This work shall be done only when directed by the City. Sufficient rollers shall be provided to compact the material in a satisfactory manner. When operations are so isolated from one another that one roller unit cannot perform the required compaction satisfactorily, additional roller units shall be provided.

(1) Embankments and flexible Bases. The embankment layer or the base course shall be sprinkled if directed, and rolling with a power roller shall start longitudinally at the sides and proceed towards the center overlapping on successive trips by at least one-half (1/2) of the width of the rear wheel of the power roller. On superelevated curves, rolling shall begin at the low sides and progress toward the high sides. Alternate trips of the roller shall be slightly different in length.

Rolling shall continue until discontinued by the City. The rollers, unless otherwise directed, shall be operated at a speed between two (2) and three (3) miles per hour.

(2) Surface Treatments. Rolling shall be done as called for in surface treatment items. The sequence of work shall be as specified for embankment layer or base course in accordance with

Subarticle 210.3.(1) or as directed by the City. The operating speed shall be as directed by the

City.

210.4 MEASUREMENT.

When shown on the Plans to be a pay item, this Item will be measured by the actual hours the power roller works as directed by the City.

ROLLING (FLAT WHEEL) ITEM 210

Rev JAN08 210-2

210.5 PAYMENT.

The cost of furnishing and operating the equipment as prescribed by this Item will not be paid for directly but will be considered subsidiary to the various bid items of the contract, unless this Item is specified as a pay item in the contract.

When flat wheel rolling is specified as a pay item, the equipment furnished and operated in accordance with this item and measured and provided under “Measurement” will be paid for at the unit price bid for “Rolling (Flat Wheel)”. This price shall be compensation for furnishing and operating all equipment; and for all labor, fuel, tools and incidentals necessary to satisfactorily perform the work.

ROLLING (PNEUMATIC TIRE) ITEM 213

REV JAN08 213-1

CITY OF SAN ANGELO

ITEM 213

ROLLING (PNEUMATIC TIRE)

213.1 DESCRIPTION.

This Item shall govern for the compaction of embankment, flexible base, surface treatments, or pavements by the operation of approved pneumatic tire rollers as herein specified and as directed by the City.

213.2 EQUIPMENT.

(1) General. When used on seal coats, asphaltic surface treatments and bituminous mixture pavements, the roller shall be self-propelled and equipped with smooth tread tires whether “Rolling

(Light Pneumatic Tire)” or “Rolling (Medium Pneumatic Tire)” is specified on the plans. The roller shall be so constructed as to be capable of being operated in both a forward and a reverse direction.

When used on bituminous mixture pavements, the roller shall have suitable provisions for moistening the surface of the tires while operating.

Where turning is impractical or detrimental to the work, and when specifically directed by the

City, the roller shall be capable of being operated in a forward or backward motion.

In lieu of the rolling equipment specified, the Contractor may, upon written permission from the

City, operate other compacting equipment that will produce equivalent relative compaction in the same period of time as would be expected of the specified equipment, as determined by the City, its use shall be discontinued and the Contractor will be required to furnish the specified equipment.

(2) The Light Pneumatic Tire Roller. It shall consist of not less than nine pneumatic tired wheels, running on axles in such manner that the rear group of tires will cover the entire gap between adjacent tires of the forward group, and mounted in a rigid frame and provided with a loading platform or body suitable for ballast loading. The front axle shall be attached to the frame in such manner that the roller may be turned within a minimum circle. The pneumatic tire roller under working conditions shall have an effective rolling width of approximately sixty inches and shall be so designed that by ballast loading, the total load may be varied uniformly from 9,000 to 18,000 pounds. The roller shall be equipped with tires that will afford ground contact pressures of 45 pounds per square inch (p.s.i.) or more. The operating load and tire air pressure shall be within the range of the manufacturer’s charts or tabulations showing the contact areas and contact pressures for the full range of tire inflation pressures and for the full range of loadings for the particular tires furnished. The roller under working conditions shall provide a uniform compression under all wheels. Individual tire inflation pressures shall be within plus or minus five (5) p.s.i. of each other. The pneumatic tire roller shall be drawn by either a suitable crawler type tractor, a pneumatic tired tractor or a truck of adequate tractive effort, or may be of the self-propelled type, and the roller, when drawn or propelled by either type of equipment, shall be considered a light pneumatic tire roller unit.

REV JAN08 213-2

(3) The Medium Pneumatic Tire Roller (Type A). It shall consist of not less than seven

(7) pneumatic tired wheels, running on axles in such manner that the rear group of tires will cover the entire gap between adjacent tires of the forward group, and mounted in a rigid frame and provided with a loading platform or body suitable for ballast loading. The front axle shall be attached to the frame in such manner that the roller may be turned within a minimum circle. The pneumatic tire roller under working conditions shall have an effective rolling width of approximately 84 inches and shall be so designed that by ballast loading the total load may be varied uniformly from 23,500 to

50,000 pounds. The roller shall be equipped with tires that will afford ground contact pressures to 80 p.s.i. or more. The operating load and tire air pressure shall be within the range of the manufacturer’s chart as approved by the City. The roller under working conditions shall provide a uniform compression under all wheels. Individual tire inflation pressures shall be within plus or minus five

(5) p.s.i. of each other.

The pneumatic tire roller shall be drawn by either a suitable crawler-type tractor, a pneumatic tired tractor or a truck of adequate tractive effort, or may be of the self-propelled type; and the roller, when drawn or propelled by either type of equipment, shall be considered a medium pneumatic tire roller unit. The power unit shall have adequate tractive effort to properly move the operating roller at variable uniform speeds up to approximately five (5) miles per hour.

(4) The Medium Pneumatic Tire Roller (Type B). It shall conform to the requirements for Medium

Pneumatic Tire Roller, Type A as specified in Subarticle 213.2, except that the roller shall be equipped with tires that will afford ground contact pressures to 90 p.s.i. or more.

213.3 CONSTRUCTION METHODS.

This work shall be done only when directed by the City. The embankment layer or the base course shall be sprinkled if directed, and rolling with a pneumatic tire roller shall start longitudinally at the sides and proceed towards the center, overlapping on successive trips by at least one-half (1/2) of the width of the pneumatic tire roller.