WPC| 2QBVROZ|d 5f@8,?f\  P6G;?P"m+^8AM``AAA`k2A26``````````66kkkTwkAIwkkwwA6AX`AT`T`TA``66`6````AI6````T\&\hA2hXAAA2AAAAAAAA`6TTTTT}TwTwTwTwTA6A6A6A6``````````T`^```k`TTTTTTTywTwTwTwT````````A6A6A6A6kI`w6wMw6wAw6`q````AAAkIkIkIkIwQw6w6```````wTwTwT`w6`AkIw6``y``2``@#@WddddddddddddddddddddddddddddddddddddddddNEssEX`AT`````6=`:=`:AATT`BBs``uEssErkkAT`:"`soh`kss`HP LaserJet 4HPLAS4.PRS 4?f\  P6G;\*"P?P2$r Z  X` hp x (#%'0*,.8135@8:, P age,  s5  F ooter, B , E dit. Delete the "Project Name (ftr B)" text and replace  s5 it with the name of the project (bolded) . , until you arrive at the document text.(# D.The Guide Specifications are being reviewed and revised. Your technical comments on any guide spec would be greatly appreciated. Also, any specs that are written "from scratch" that would benefit others could be sent to either Dion Dishong or Lori Quayle, RS110.(#  s5  DRAWING DATA REQUIRED: Use the following standard drawings as appropriate; add location, grade and elevation of trench and detail drawings showing width of trench, bedding and backfill information: A. Drawing No. 02514-1: Pipeline Installation Types(# B. Drawing No. 02514-4: Concrete Thrust Blocks (For Pipelines)(# REVISIONS OF THIS SECTION:  r5   CSI format, editorial changes: 8/96 Metric: 3/96 Technical Update: 3/96 POINT OF CONTACT: Curt Wagner Phone: (303) 2369522   X` @ `@ !@  `@ `! X #d6X@8;Oe@# I. A. 1. a.(1)(a) i) a).1 A. 1. a. 1) a)(1)(a)J s4  `(#QTRENCHING Project Name (ftr B)` (#T[3/96]  s4N .02321  ă  b-SECTION 02321 */TRENCHING PART 1P GENERAL(# 1.1p  SUMMARY(#  @@ A.  Section Includes: Trenching, backfilling, and compacting for the installation of utility lines.(#  @@ B.  Related Sections:(#  ************************************************** DELETE EITHER 01009 OR 01010. EITHER SECTION 01300 OR 01410 MUST BE USED WHEN 01010 IS USED. ************************************************** @@   General Information and Requirements(# `(#MSection 01009 @@   Summary of Work(# `(#MSection 01010 @@   Testing Laboratory Services(# `(#MSection 01410 @@   Clearing and Grubbing(# `(#MSection 02231 @@   Explosives(# `(#MSection 02302 @@   Utility Line Marking(# `(#MSection 02501 @@   Testing of Piping Systems(# `(#MSection 02518 1.2p  DEFINITIONS(#  ***************************************************** UNCLASSIFIED MATERIAL CLASSIFICATION IS NOT USED WITH OTHER MATERIAL CLASSIFICATIONS. ***************************************************** @@ A.  Unclassified Excavation: Shall consist of the material excavated and its placement, regardless of its nature.(#  @@ B.  Rock Excavation: Removal of material shall be considered rock excavation when it consists of igneous, metamorphic, and sedimentary rock which cannot be excavated without blasting or the use of a tractor having a power rating in excess of 195 net hp, with a rearmounted, heavyduty, singletooth ripping attachment.(#  @@ C.  Common Excavation: Removal of materials which can be excavated using a rearmounted, heavyduty, singletooth, ripping attachment mounted on a crawler tractor with a power rating of 195 net hp or less shall be considered common excavation.(#  @@ D.  Muck Excavation: Shall consist of the removal and disposal of deposits of saturated or unsaturated mixtures of soils and organic matter not suitable for foundation material regardless of moisture content.(#  @@ E.  Fill Material: Shall be mineral soil, free from peat, frozen material, brush, trees, roots over 50 mm (2 inches) in diameter and rocks over 150mm (6inches) in greatest diameter obtained from the site during excavation.(#  @@ F.  Topsoil: Surface soil, approximately 150mm (6 inches) in depth that supports growth of vegetation and contains organic matter. Topsoil shall be free from subsoil, debris, and stones larger than 25mm (1 inch) in diameter.(#  1.3p  QUALITY ASSURANCE(#  @@ A.  Failure Criteria: Not limited to the following:(#  @@   1. Settlement of backfill below natural ground surface.(# @@   2. Evidence of leakage of the piping.(# )-**Ԍ@@   3. Malfunctioning of buried electrical or piping systems.(# 1.4p  PROJECT AND SITE CONDITIONS(#  @@ A.  Borrow Sources: Shall be as approved by the Contracting Officer prior to excavation.(#  @@ B.  Environmental Conditions:(#  @@   1. Excavate areas that have become saturated with oil, gasoline, or bituminous products to a depth of 300mm (12 inches) beyond contaminated materials; backfill with approved material.(# @@   2. [Finish slopes according to the drawings.] [The final surface shall be similar to a surface obtained by using a farm disk or harrow parallel to the contours and shall blend with the adjacent terrain.] [Hand rake as necessary to remove excess material in areas inaccessible to construction equipment.] [Grade to produce a well-drained surface.] [Excess material from trench excavation shall be placed over the backfill in an inverted "U" shape.](# PART 2.1 A. 1. a. 1) a)(1)(a).1 A. 1. a. 1) a)(1)(a)P PRODUCTS(# 2.1p  MATERIALS(#  @@ A.  General: Material excavated shall be considered unclassified.(#  ***************************************************** SELECT MAXIMUM ROCK SIZE ALLOWED IN BACKFILL. NOTE: ROUND AGGREGATE IS TO BE USED FOR PLASTIC PIPES AND ELECTRIC AND TELEPHONE CABLE INSTALLATIONS. ***************************************************** @@ B.  Fill Material: Shall be approved before use. Material from excavations shall be used, unless it contains ice or frozen earth, debris, high moisture content, or is specified in other sections to be replaced. Materials removed in clearing and grubbing shall not be used for backfill. Backfill shall not contain rock larger than [ ]mm ([à]inches) in diameter.(#  @@ C.  Crushed Rock Backfill:(#  @@   1. Plasticity Index shall be as determined by AASHTO T 90, not to exceed 9 for portion passing No. 40 sieve.(# @@   2. Gradation requirements:(# O ddx !TT<h O   "r Passing ~Sieve Designation"2Percentages By Weight )&Square Mesh Sieves (AASHTO T 27 & T 11)  1inch 100  3/4-incht 75-95   No. 4g! 35-55  t  No. 40Z" 6-25 # g! No. 200}# 0-6# Z" @@ D.  Bedding: Shall be [round] [or] [angular] [stone] [sand] [or] [gravel,] [or other angular] [fine-grained and free-draining soil.] [13mm (1/2-inch) minus crushed or pit-run aggregate.] [as shown on the drawings.] [materials from the excavation that passes a 1-1/2-inch sieve.] [material approved by the Contracting Officer, with a general size range from 6mm to 13mm (1/4 inch to 1/2 inch).] [One hundred percent of the material shall pass a [1/2]-inch sieve.] [Not more than 5 percent shall pass a No. 8 sieve.](#  \)-**Ԍ@@ E.  Sod Materials: Shall consist of the grass mat from a lawn or cultured grass area, which has sufficient root mat to remain together when rolled or removed from the trench area. Grass and soil, which will not reasonably remain intact, shall be considered topsoil.(#  PART 3.1 A. 1. a. 1) a)(1)(a).1 A. 1. a. 1) a)(1)(a)P EXECUTION(# 3.1p  PREPARATION(#  @@ A.  Clearing: [Maximum clearing width is 1200mm (4 feet) on each side of the trench. Provide minimum disturbance to existing grass and sod. Dispose of debris [ ]. [Clearing and grubbing shall be according to Section 02231 - Clearing and Grubbing.](#  @@ B.  Sod Conservation:(#  @@   1. Sod shall be cut in strips of sufficient width to allow trench construction without loss of remaining sod.(# @@   2. Sufficient soil shall remain on the root mat to cover the major root system and assure growth when replaced. In no case shall this mat be less than 75mm (3 inches) thick.(# @@   3. Length of sod strip shall be limited to produce a piece that can be reasonably removed and replaced by one person.(# @@   4. Trench work shall be planned to allow replacement of sod strip within 72 hours of its removal. Sod shall be kept moist and protected while removed from the trench area.(# @@ C.  Topsoil: Strip topsoil, or in the absence of topsoil, strip the top 100mm to 150mm (4 to 6 inches) of surface material and store in designated stockpile areas. Do not excavate into the underlying, original topsoil at stockpiles. Place previously stripped topsoil onto disturbedearth areas upon completion of the backfilling operation.(#  @@ D.  Utilities: Before starting excavation, establish the location and extent of underground utilities in the work area. Protect active utility services uncovered by excavation. Notify the Contracting Officer immediately if utilities are damaged. Damage to utilities shall be repaired or replaced at the Contractor's expense. [Repair to damaged utilities shall be started immediately unless otherwise authorized by the Contracting Officer.](#  @@ E.  Cutting Pavement, Curbs, and Gutters: Make cuts with parallel, straight lines, 300mm (1 foot) wider than trench width on each side of trenches [and 300mm (1 foot) beyond each edge of pits].(#  @@ F.  Protection of Excavation: Construct and maintain shoring, bracing, underpinning, and sheet piling necessary to protect the [excavation.] [and] [adjacent structures.] Remove protection devices when safe to do so, or as authorized by the Contracting Officer. Portions wholly buried by earth and at a distance of at least 450mm (18 inches) from permanent structures may be left in place in the completed work. The exposed portion of the sheeting and shoring must be removed before completing the backfill.(#  @@ G.  Dewatering: Keep the excavation dewatered so that pipe, forming, and concrete work can be carried on under dewatered conditions. Dispose of excess water [by using natural drainageways near the site to the extent of their natural capacity, when no erosion or other damage will be encountered.] [in a manner that will avoid damage to adjacent property.] [Contain water on Government property.](#  3.2p  INSTALLATION(#  @@ A.  General:(# )-**Ԍ@@   1. Restore disturbed areas of existing bituminous pavements.(# @@   2. Restore disturbed areas of existing concrete structures.(# @@   3. Do not install bedding material above [water] [electrical] [telephone] [and] [sewer] systems until system testing is completed and approval granted by the Contracting Officer.(# @@ B.  Trench Excavation: Shall be as [shown on the drawings.] [staked in the field.] [Pipe] [and] [electrical] [and] [telephone] [cable] shall be 1500mm (5feet) below natural ground except drainpipes which are daylighted.] Excavate trenches in rock to a depth of at least 100mm (4 inches), but not exceeding 300mm (12 inches), below pipe bottom.(#  @@   1. When overexcavation occurs, repair the area by backfilling with approved bedding material and compacting to 95 percent maximum dry density according to AASHTO T 99, Method C.(# @@   2. When frost action occurs, remove frozen soil and replace with approved soil compacted to 95% of maximum dry density as determined by AASHTO T 99, Method C.(# @@   3. When soil becomes saturated above the optimum moisture content, compact after it has dried, or remove soil down to firm material and place backfill before construction proceeds.(# @@   4. Directburial cable trenches shall be excavated 150mm (6 inches) below required minimum cable depth. [Cables shall be installed in conduit under roads or paved areas.](# @@ C.  Removal of Materials by Explosives: [The use of explosives to remove materials, which cannot be excavated without blasting, shall be done according to Section 02302 - Explosives.] [The use of explosives is prohibited.](#  ***************************************************** SELECT APPLICABLE WORDS AND PHRASES. USUALLY BEDDING IS SPECIFIED AS TYPE A, B, OR C AND REFERENCED HERE AND ON THE DRAWING. ***************************************************** @@ D.  Bedding: [Shall be placed as shown on the drawings.] [Shall be placed in 150mm (6-inch) maximum loose lifts.] [Bedding shall extend from 150mm (6inches) below the lowest utility to 150mm (6 inches) above the highest utility.] [Place cable or conduit in the center zone of the bedding material.] [Fine grade the trench bottom throughout and provide uniform and continuous support for each section of [pipe] [and] [electrical] [and] [telephone] [cable] [conduit] [except at] [bell holes] [or] [depressions necessary for making proper joints.] [Compact to 95 percent maximum dry density as determined by AASHTO T 99, Method C.](#  @@ E.  Trench Backfill: After testing and approval of interconnected [piping] [and] [electrical] [and] [telephone] systems, the trench backfilling shall be completed. [Where shown on the drawings, the backfill shall be placed without compaction.] [The excavated material shall be placed in the trench and shall be mounded as shown on the drawings.] Puddling or flooding of trench for consolidation of backfill or use of wheel rolling by construction equipment will not be permitted.(#  @@   1. Provide uniform and continuous support for each section of [pipe] [except at] [bell holes] [or] [depressions necessary for making proper joints.] Place backfill in 150mm (6-inch) maximum loose lifts to a depth of 300mm (1 foot) over the top of the pipe. Compact to 95 percent maximum dry density as determined by AASHTO T 99, Method C. Prevent lateral displacement during compaction.(# @@   2. Provide uniform and continuous support for each section of [electrical] [and] [telephone] [cable] [conduit], except at depressions necessary for making proper connections. Place backfill in 150mm (6-inch) maximum loose lifts to a depth of 1 ft over the top of the cable or conduit. Place cable or conduit in center of 150mm (6-inch) minimum diameter zone of bedding)-** material. Compact to 95 percent maximum dry density as determined by AASHTO T 99, Method C. Prevent lateral displacement during compaction.(# @@ F.  Utility Line Marking: Shall be done according to Section 02501 - Utility Line Marking.(#  3.3p  FIELD QUALITY CONTROL(#  @@ A.  Testing: [The Government will perform the required testing, recording, and distributing of the results.] [The Government will make arrangements for a certified, independent testing laboratory to perform the required testing, recording, and distributing of the results.] [Conduct the performance and acceptance tests of the [ .] Furnish necessary equipment, labor, and materials to conduct the testing. Testing shall be conducted in the presence of the Contracting Officer, who shall be given 49 hours notice before any test is to be conducted.] [Arrange for a certified, independent testing laboratory, according to the requirements of Section 01410 Testing Laboratory Services, to perform the required testing, recording, and distributing of the results.](#  @@ B.  Testing of Pipe Lines: Shall be done according to Section 02518 - Testing of Piping Systems.(#  PART 4.1 A. 1. a. 1) a)(1)(a).1 A. 1. a. 1) a)(1)(a)P MEASUREMENT AND PAYMENT(# 4.1p  METHOD OF MEASUREMENT(#  ***************************************************** WHEN A "LUMP SUM" CONTRACT IS USED, DELETE THE TITLE PART 4: MEASUREMENT AND PAYMENT, AND BOTH ARTICLES FROM THIS SECTION. MEASUREMENT AND PAYMENT WILL BE ADDRESSED IN PART 4 OF SECTION 01009 OR SECTION 01010. WHEN NOT A "LUMP SUM" CONTRACT, SELECT APPLICABLE PHRASES; USE THE "NO MEASUREMENT" PHRASE WHEN NONE OF THE PAY ITEMS IN THIS SECTION ARE INCLUDED IN THE BID SCHEDULE. ***************************************************** @@ A.  Units: The work described in this section will [not be measured for payment.] [be measured and paid for] [on a lump sum basis.] [by the linear millimeter (foot) as measured along the ground surface over the completed utility.](#  p 4.2p  BASIS OF PAYMENT(#  ***************************************************** WHEN NOT A "LUMP SUM" CONTRACT, SELECT APPLICABLE PHRASES; USE THE "NO DIRECT PAYMENT" PHRASE WHEN NONE OF THE PAY ITEMS IN THIS SECTION ARE INCLUDED IN THE BID SCHEDULE. WHEN NOT A "LUMP SUM" CONTRACT AND PAYMENT IS TO BE MADE UNDER THIS SECTION, SELECT APPLICABLE PAY ITEMS. DO NOT CHANGE PAY ITEM NUMBER. WHEN THERE IS MORE THAN ONE SIZE OF TRENCH OR BEDDING SPECIFIED ON THE PROJECT, THERE SHOULD BE SEPARATE PAY ITEMS FOR EACH TYPE. ***************************************************** @@ A.  Payment: [No direct payment for the work described under this section will be made. Consideration for this item shall be included in the bid price for other items of the Contract.] [Prices and payment will be p full compensation for the work described in this section. Payment will be made under:](#  @@   Pay Item  Pay Unit(# @@   02321(01) Trenching(# p (#RLump Sum)-**Ԍ@@   02321(02) Trenchingƈ p(#BLinear Millimeter (Foot) 0,END OF SECTION