STANDARD CONSTRUCTION SPECIFICATIONS FOR …

1 I STANDARD CONSTRUCTION SPECIFICATIONS FOR EARTHWORK DIVISION 20 INDEX SECTION GENERAL .. 1 Article Scope of 1 Article Definitions .. 1 Article Applicable 2 Article Equipment .. 3 Article Compaction 3 Article Subsurface Investigation .. 4 Article Weather Limitations .. 5 Article Underground 5 Article Contaminated Material .. 5 SECTION STORM WATER POLLUTION PREVENTION PLAN .. 6 Article General .. 6 Article Definitions and Web 6 Article Plan and Permit Submittals .. 9 Article Personnel Qualifications and Authority .. 10 Article Control and Prevention Plan Contents .. 11 Article Materials .. 14 Article CONSTRUCTION .. 14 Article SWPPP Inspections, Reports and 16 Article Measurement .. 19 Article Basis of 19 SECTION EXPLORATORY TEST PITS .. 20 Article General .. 20 Article Materials .. 20 Article CONSTRUCTION .. 20 Article Measurement .. 20 Article Basis of 20 SECTION CLEARING AND GRUBBING.

2 21 Article General .. 21 Article CONSTRUCTION .. 21 Article Measurement .. 21 Article Basis of 21 SECTION 22 Article General .. 22 Article CONSTRUCTION .. 22 Article Measurement .. 22 Article Basis of 23 ii SECTION REMOVAL OF 24 Article General .. 24 Article CONSTRUCTION .. 24 Article Measurement .. 24 Article Basis of 24 SECTION REMOVAL OF SIDEWALK AND CONCRETE APRON .. 25 Article General .. 25 Article CONSTRUCTION .. 25 Article Measurement .. 25 Article Basis of 25 SECTION REMOVAL OF CURB AND GUTTER .. 26 Article General .. 26 Article CONSTRUCTION .. 26 Article Measurement .. 26 Article Basis of 26 SECTION REMOVAL OF 27 Article General .. 27 Article CONSTRUCTION .. 27 Article Measurement .. 27 Article Basis of 28 SECTION EXCAVATION FOR TRAFFIC WAYS .. 29 Article General .. 29 Article Survey Stakes .. 29 Article Miscellaneous ..29 Article Unusable and Usable Excavation.

3 30 Article Utilization or Disposal of Excavated Material .. 30 Article 31 Article Measurement .. 31 Article Basis of 32 SECTION GRADING EXISTING SURFACES .. 33 Article General .. 33 Article CONSTRUCTION .. 33 Article Measurement .. 33 Article Basis of 33 SECTION 34 Article General .. 34 Article Materials .. 34 Article CONSTRUCTION .. 34 Article Measurement .. 35 Article Basis of 35 iii SECTION TRENCH EXCAVATION AND 36 Article General .. 36 Article Trench Excavation and Backfill - Description .. 36 Article CONSTRUCTION .. 37 Article Measurement .. 39 Article Basis of 40 SECTION TRENCH EXCAVATION, BACKFILL AND COMPACTION FOR SERVICE CONNECTIONS .. 41 Article General .. 41 Article CONSTRUCTION .. 41 Article Measurement .. 43 Article Basis of 43 SECTION FURNISH TRENCH BACKFILL .. 44 Article General .. 44 Article CONSTRUCTION .. 44 Article Measurement .. 44 Article Basis of 44 SECTION FURNISH BEDDING MATERIAL.

4 45 Article General .. 45 Article Materials .. 45 Article CONSTRUCTION .. 46 Article Measurement .. 47 Article Basis of 47 SECTION FURNISH FILTER MATERIAL .. 48 Article General .. 48 Article Materials .. 48 Article CONSTRUCTION .. 48 Article Measurement .. 48 Article Basis of 49 SECTION DRAIN/FILTER 50 Article General .. 50 Article Materials .. 50 Article CONSTRUCTION .. 50 Article Measurement .. 50 Article Basis of 51 SECTION FURNISH FOUNDATION 52 Article General .. 52 Article Materials .. 52 Article CONSTRUCTION .. 52 Article Measurement .. 52 Article Basis of 52 iv SECTION UNCLASSIFIED FILL AND BACKFILL .. 53 Article General .. 53 Article Material .. 53 Article CONSTRUCTION .. 53 Article Measurement .. 53 Article Basis of 53 SECTION CLASSIFIED FILL AND 54 Article General .. 54 Article Material .. 54 Article CONSTRUCTION .. 56 Article Measurement.

5 58 Article Basis of 58 SECTION LEVELING 59 Article General .. 59 Article Material .. 59 Article CONSTRUCTION .. 60 Article Measurement .. 61 Article Basis of 62 SECTION 63 Article General .. 63 Article Materials .. 63 Article CONSTRUCTION .. 63 Article Measurement .. 63 Article Basis of 63 SECTION 64 Article General .. 64 Article Materials .. 64 Article CONSTRUCTION .. 64 Article Method of Measurement .. 65 Article Basis of 65 SECTION GEOTEXTILE FABRIC .. 66 Article Description .. 66 Article Materials .. 66 Article CONSTRUCTION .. 71 Article Method of Measurement .. 73 Article Basis of 73 SECTION ROADWAY INSULATION .. 74 Article General .. 74 Article Materials .. 74 Article CONSTRUCTION .. 74 Article Measurement .. 75 Article Basis of 75 v SECTION DISPOSAL OF UNUSABLE OR SURPLUS MATERIAL .. 76 Article General .. 76 Article CONSTRUCTION .. 76 Article Measurement.

6 76 Article Basis of 77 SECTION RECONSTRUCT 78 Article Description .. 78 Article Materials .. 78 Article CONSTRUCTION .. 78 Article Measurement .. 79 Article Basis of 79 SECTION PIPE CASING .. 80 Article General .. 80 Article Materials .. 80 Article CONSTRUCTION .. 80 Article Measurement .. 80 Article Basis of 80 SECTION SHORING, SHEETING AND BRACING/SHORING AND SHEETING LEFT IN THE TRENCH AND PORTABLE .. 81 Article General .. 81 Article Materials .. 81 Article CONSTRUCTION .. 81 Article Measurement .. 81 Article Basis of 82 Page 1 STANDARD CONSTRUCTION SPECIFICATIONS Division 20 - Earthwork revised 11/08 STANDARD CONSTRUCTION SPECIFICATIONS FOR EARTHWORK DIVISION 20 SECTION GENERAL Article Scope of Work The Work covered by this Division consists of providing all plant, labor, equipment, supplies, material, transportation, handling, and storage, and performing all operations pertaining to the: 1) CONSTRUCTION of subbase for parking lots, streets, alleys, curbs, gutters, sidewalks and bike trails, 2) CONSTRUCTION for all trench excavation, backfill, bedding, and foundation material for utility installation; and 3) excavation and backfill for building structures and retaining walls.

7 Article Definitions A. Backfill Material placed in an excavated area. B. Bedding Ground or support in which pipe is laid. C. Borrow Material used as fill and/or backfill which is obtained from a source other than required excavation. D. Compaction Tamping by hand or machine to achieve required density in soils. E. Disposal Site Any area where waste, unsuitable, unusable or surplus material from CONSTRUCTION is placed. Contractor provided disposal sites are delineated in Division 10, Section , Article Disposal Sites. F. Excavation Area or material removed to provide a suitable base for improvement. Page 2 STANDARD CONSTRUCTION SPECIFICATIONS Division 20 - Earthwork revised 11/08 G. Fill Fill is considered the material placed above the original or natural ground line. H. Leveling Course Leveling course is compacted material placed above the subbase and below the finishing surface of the improvement.

8 I. Non-Frost-Susceptible Material Non-organic soil containing less than three percent (3%) by weight of grains smaller than .02 mm obtained from minus three inches (-3") material. J. Service Connection Any connection from a main line utility or storm drain to a property line for the purpose of providing service to an individual property K. Subbase The subbase is compacted material placed above the subgrade and below the leveling course. L. Subgrade or Bottom Excavation The subgrade is material below the bottom of excavation and upon which the subbase material is placed. M. Trench Any excavation for a utility or drainage system. N. Unsuitable or Unusable Material Unsuitable or unusable material may consist of any material which is, in the opinion of the Engineer, inadequate for use in the proposed CONSTRUCTION . Article Applicable standards The latest revision of the following standards of the American Society for Testing and Materials (ASTM) and the American Association of State Highway Transportation Officials (AASHTO) are hereby made a part of these SPECIFICATIONS : ASTM C-29 Test for Unit Weight of Aggregate ASTM C-117 Test for Materials Finer than No.

9 200 Sieve in Aggregates by Washing ASTM C-131 Test for Resistance to Abrasion of Small Size Coarse Aggregate by Use of the Los Angeles Machine Page 3 STANDARD CONSTRUCTION SPECIFICATIONS Division 20 - Earthwork revised 11/08 ASTM C-136 Test for Sieve or Screen Analysis of Fine and Coarse Aggregates ASTM D-422 Test for Particle Size Analysis of Soil ASTM D-424 Test for Plastic Limit and Plasticity Index of Soils AASHTO M-147 Materials for Aggregate and Soil-Aggregate Subbase, Base, and Surface Courses AASHTO T-180-D Test for Moisture-Density Relations of Soils AASHTO T-205 Test for Field Determination of Density of Soil In-Place AASHTO T-238 Test for Density of Soil In-Place by Nuclear Method. Article Equipment All equipment, tools, and machines used in the performance of the Work covered by these SPECIFICATIONS shall be subject to the approval of the Engineer and shall comply with all applicable safety requirements.

10 All equipment used on the project shall be adequately maintained and shall be the proper equipment for the Work being accomplished so as to produce the result required by the Contract Documents. Article Compaction standards The required density of fill and backfill shall meet the requirements as outlined in Section - Classified Fill and Backfill. In areas outside of road rights-of-way, the density shall be as required by the Contract Documents or as directed by the Engineer. Where compaction density is specified, the maximum density shall be determined in accordance with the current requirements of AASHTO STANDARD Method T-180-D. The Diameter of the test mold in AASHTO T-180 Method D limits the size of particles which may be included in the test to that passing the three-quarter inch (3/4 ) sieve. In those instances where the particles are retained on the three-quarter inch (3/4 ) sieve, a correction must be applied to the STANDARD laboratory density prior to calculating the percent compaction.