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Home My WebLink AboutR-402608O N TRENCH RESTORATION AND STREET OVERLAY REQUIREMENTS (CONT'D) TRENCH RESTORATION AND STREET OVERLAY REQUIREMENTS (CONT'D) TRENCH RESTORATION AND STREET OVERLAY REQUIREMENTS (CONT'D) O DEPARTMENT OF COMMUNITY CITY OF AND ECONOMIC DEVELOPMENT Renton .� CITY OF RENTON STANDARDS (3) If the outside of the trenching is within three feet (T) of any adjacent lane line, the entire adjacent twenty-four inch (24") lifts, up to the top six-foot (6) zone. All trench backfill shall be firm and unyielding IPlanning Division 1 1055 South Grady Way, 6t" Floor I Renton, WA 98057 1 425-430-7200 All materials and workmanship shall be in accordance with the City of Renton Standard and Supplemental Specifications traveled land affected will be overlaid. but in no case shall be compacted to more than ninety-two percent (92%) of maximum density in 0 Website: rentonwa.gov (current adopted version) except where otherwise noted in these standards. Materials and workmanship are required to 4 If the trenching Is greater than ore equal to 30% of lane per block 660 foot maximum block length),or () g� g q p ( permeable pavement areas. W be in conformance with standards for the Standard Specifications for Road, Bridge, and Municipal Construction prepared if the total patches exceed 12 per block, then the lanes affected will be overlaid. Minimum overlay f. All compaction shall be performed by mechanical methods. The compaction tests may be performed in TRENCH RESTORATION AND STREET OVERLAY by the Washington State Chapter of the American Public Works Association (APWA) and the Washington State Department shall include all patches within the block section. four -foot (4') vertical increments maximum. The test results shall be given to the Engineer for review and of Transportation (WSDOT) and shall comply with the current edition, as modified by the City of Renton Supplemental (5) The entire traveled lane width for the length of the trench and an additional ten feet (10) at each end approval prior to paving. The number and location of tests required shall be determined by the Engineer. REQUIREMENTS1. Specifications. An asphalt paver shall be used in accordance with Section 5-04.3(3) of Standard Specifications. A "Layton Box" of the trench will be ground down to a depth of two inches (2"). A two-inch (2") overlay of Class B will d. Temporary restoration of trenches for overnight use shall be accomplished by using MC mix (cold mix), or equal may be used in place of the power -propelled paver. Rollers shall be used in accordance with Section 5- be applied per City standards. Asphalt Treated Base (ATB), or steel plates, as approved by the Engineer. ATB used for temporary Published: 211612018 04.3(4) of the Standard Specifications. Plate Compactors and Jumping Jacks shall not be used in lieu of C. Potholing: restoration may be dumped directly into the trench, bladed out and rolled. After rolling, the trench must rollers. be filled flush with asphalt to provide a smooth riding surface. If the temporary trench restoration does It is the intent of the following policies, procedures and specifications to obtain satisfactory work with a Potholing shall meet the same requirements as trenching and pavement restoration. Potholing shall be a not hold up, the contractor shall repair the patch within eight hours of being notified of the problem by U minimum of delayto all parties concerned when performing trench restorations or street overlays. p p g Y 2. Trench backfill and resurfacing shall be as shown in the City of Renton Standard Details, unless modified by the minimum of one foot (1') beyond the excavation. All affected lanes will be ground down to a depth of two the City. This requirement applies 24 hours per da seven days per week. In the event that the City Y q pP P Y, Y P Y z — City permit. Surfacing depths shown in the standard details are minimums and may be increased by the Engineer inches (2") and paved not less than six and one half feet (6.5') wide for the entire width of the lane. Potholes determines to repair the temporary patch, the contractor shall reimburse the City in an amount that is _ to meet traffic loads or site conditions. greater than five feet (5') in length, width or diameter shall be restored to trench restoration standards. In double the City's costs in repairing the patch, with the second half of the reimbursement to represent City IPURPOSE 3. Requirement for Patching, Overlay, and Overlay Widths: all cases potholes shall be repaired per Renton Standard Plans. Restoration requirements utilizing vactor P p P q g overhead and hidden costs. The purpose of this Code Section is to establish guidelines for the restoration of City streets disturbed by installation of equipment will be determined by the Engineer. W utilities and other construction activities. Any public or private utilities, general contractors, or others permitted to work All trench and pavement cuts shall be made by sawcut or by grinding. Sawcuts or grinding shall be a minimum e. Asphalt Concrete Class E or Class B shall be placed to the compacted depth as required and indicated on in the public right-of-waywill adhere to the procedures set forth in this olic p p policy. of one foot 1' outside the trench width. The to two inches 2" of as halt shall be round down to a minimum ( ) p ( ) p g 4. Pavement Removal in Lieu of Grinding: City of Renton Standard Plans or as directed b the Engineer. The grade of asphalt shall be AR-4000W. The Y Y g� g p Odistance of one foot (1') beyond the actual outside edges of the trench and shall be replaced with two inches The contractor in all cases can remove the pavement in the replacement area instead of grinding out the materials shall be made in conformance with Section 9-02.1(4) of the Standard Specifications. = DEFINITION "engineer" (2") of Class B asphalt, per City of Renton Standard Plans. At the discretion of the engineer, a full street width specified two inches (2") of asphalt. Full pavement replacement to meet or exceed the existing pavement depth f. Tack coat shall be applied to the existing pavement at edge of saw cuts and shall be emulsified asphalt I Engineer: The term shall denote the City project manager, inspector and/or plan reviewer, or their designated overlay may be required. will be required for the area of pavement removal. Patching of pervious concrete shall follow American Concrete grade CSS-1, as specified in Section 9-02.1(6) of the Standard Specifications. Tack shall be applied as Q representative. Lane -width or a full street -width overlay will be determined based upon the location and length of the proposed 1-13 .. - Institute (ACI) 522Porous asphalt shall be specified on a project -by -project basis by the engineer. specified in Section 5-04 of the Standard Specifications. APPLICATION trench within the roadway cross-section. Changes in field conditions may warrant implementation of additional Permeable materials should be replaced in -kind where feasible. Patching porous asphalt with conventional g. Asphalt Concrete Class E or Class B shall be placed in accordance with Section 5-04 of the Standard 0/ overlay requirements. asphalt is acceptable if it is no more than ten percent (10%) of the total facility area or does not impact the . W The following standards in this Section shall be followed when doing trench or excavation work within the paved portion overall facility function. Appropriate precautions shall be taken during pavement repair and replacement e efforts Specifications; except those longitudinal joints between successive layers of asphalt concrete shall be _ of any City of Renton right-of-way. Modifications or exemptions to these standards may be authorized by the Community a. Trenches (Road Crossings); to prevent clogging of adjacent surfaces. displaced laterally a minimum of twelve inches (12"), unless otherwise approved by the Engineer. Fine (� and Economic Development Administrator, or authorized representative, upon written request by the permittee, the (1) The minimum width of a transverse patch (road crossing) shall be six and one-half feet (6.5'). See City and coarse aggregate shall be in accordance with Section 9-03.8 of the Standard Specifications. permittee's contractor or engineer, and demonstration of an equivalent alternative. of Renton Standard Plans. 5. Trench Backfill and Restoration Construction Re uirements: q All street surfaces, walks or driveways within the street trenching areas shall be feathered and shimmed a. Trench restoration shall be either by a patch or overlay method, as required and indicated on City of to an extent that provides a smooth -riding connection and expeditious drainage flow for the newly paved HOURS OF OPERATIONS (2) Any affected lane will be ground down two inches (2") and paved for the entire width of the lane. Renton Standard Plans. surface. Hours for work within the roadway for asphalt overlays or trench restoration shall be as directed by the Traffic Control Plan requirements and the Traffic Operations Engineer. (3) The patch shall be a minimum of one foot (1') beyond the excavation and patch length shall be a b. All trench and pavement cuts, which will not be overlaid, shall be made by sawcut or grinding. Sawcuts Feathering and shimming shall not decrease the minimum vertical curb depth below four inches (4") for minimum of an entire traveled lane. shall be a minimum of two feet 2' outside the excavated trench width. ( ) storm water flow. The Engineer may require additional grinding to increase the curb depth available for INSPECTION (4) If the outside of the trenching is within three feet (T) of any adjacent lane line, the entire adjacent c. All trenching within the top four feet (4') shall be backfilled with crushed surfacing materials conforming storm water flow in areas that are inadequate. Shimming and feathering as required by the Engineer shall The Engineer may determine in the field that a full street -width (edge -of -pavement to edge -of -pavement) overlay is traveled lane affected will be repaved. to Section 4-04 of the Standard Specifications. Any trenching over four feet (4') in depth may use materials be accomplished by raking out the oversized aggregates from the Class B mix as appropriate. required due to changes in the permit conditions such as, but not limited to the following: (5) An area including the trench and one foot (1') on each side of the trench but not less than six and one- approved by the Engineer or Materials Lab for backfilling below the four -foot (4') depth. Surface smoothness shall be per Section 5-04.3(13) of the Standard Specifications. The paving shall be 1. There has been damage to the existing asphalt surface due to the contractor's equipment. half feet (6.5') e entire wofe affected we round down to a depth ( ) total fthe tiwidth the traveled lill b g p d. If the existing material (or other material) is determined by the Engineer to be suitable for backfill, the corrected by removal and repaving of the trench only. Asphalt patch depths will vary based upon the 2. The trench width was increased significantly or the existing pavement is undermined or damaged. of two inches (2"). A two-inch 2" overly of Class B asphalt will be applied per City standards. ( ) ( ) Y P Pp p Y contractor may use the native material except that the top six inches (6") shall be crushed surfacing top streets being trenched. The actual depths of asphalt and the work to be performed shall be as required 3. Any other construction related activities that require additional pavement restoration. b. Trenches Running Parallel with the Street: course material. and indicated on City of Renton Standard Plans. Y (1) The minimum width of a longitudinal patch shall be four and one-half feet (4.5'). See City of Renton e. The trench shall be compacted to a minimum ninety-five percent (95%) density, as described in Section 2- Compaction of all lifts of asphalt shall be a minimum ninety-two percent (92%) of density as determined Standard Plans. 03 of the Standard Specifications. In the top six feet (6') of any trench, backfill compaction shall be by WSDOT Test Method 705. The number of tests required shall be determined by the Engineer. performed in eight (8) to twelve -inch (12") lifts. Any trench deeper than six feet (G) may be compacted in (2) If the trenching is within a single traveled lane, an entire lane -width overlay will be required. Page 2 of 10 1 Published: 2/16/2018 Page 3 of 10 1 Published: 2/16/2018 Page 4 of 10 1 Published: 2/16/2018 Page 1 of 10 1 Published: 2/16/2018 TRENCH RESTORATION AND STREET OVERLAY REQUIREMENTS (CONT'D) Testing shall be performed by an independent testing lab with the results being supplied to the Engineer. Testing is not intended to relieve the contractor from any liability for the trench restoration. It is intended to show the inspector, and the City, that the restoration meets these specifications. h. All joints, except those associated with permeable pavement, shall be sealed using paving asphalt AR- 4000W. i. When trenching within the unpaved roadway shoulder(s), the shoulder shall be restored to its original condition, or better. j. The final patch shall be completed as soon as possible and shall not exceed fifteen (15) working days after first opening the trench. This time frame may be adjusted if delays are due to inclement paving weather or other adverse conditions that may exist. However, delaying of final patch or overlay work is subject to the Engineer's approval. The Engineer may deem it necessary to complete the work within the fifteen (15) working day time frame and not allow any time extension. Should this occur, the contractor shall perform the necessary work, as directed by the Engineer. k. A City of Renton Temporary Traffic Control Plan (from Renton Transportation Engineering) shall be submitted and approved by the Engineer a minimum of three (3) working days prior to commencement of work. 6. Removal of Utility Locate Markings from Sidewalks Required: The permittee will be required to remove utility locate marks on sidewalks only within the Center Downtown Zone. The permittee shall remove the utility locate marks within 14 days of job completion. R-402608 IN COMPLIANCE WITH CITY OF RENTON STANDARDS FDEVELOPMENT ENGINEERING ` +11 jchavez 11 /12/2019 1 RESPOND TO CITY COMMENTS 2 RESPOND TO CITY COMMENTS /21/2019 SURVEYED: SCALE: VERTICADATE: >> HORIZONTALLY NAD D1983/1991 ' C T Y 0 F /21/2019 1 =20' SIERRA HOMES , INC. 8/31 /2018 Page 5 of 10 1 Published: 2/16/2018 3 RESPOND TO CITY COMMENTS DESIGNED: Q /16/2019 RENTON FIELDBOOK: 3802 MONTEREY PL NE RENTON WA. 98056 PAGE: 4 RESPOND TO CITY COMMENTS DRAWN: 0/31/201 ' DRAWING NO: ONE INCH DATUM CHECKED: AT FULL SCALE Planning/Buiding/Public Works Dept. C7 IF NOT ONE INCH N 0. REVISION BY DATE A P P R APPROVED: SCALE ACCORDINGLY SHEET: OF: NOTE 8 12 U Z U) CW G O 2 QI ry ry W ,rjo";,