33.Contractor to review soils report prepared by , and conform to all recommendations listed in the report.
34.The Contractor shall be responsible for managing construction activities to insure that public streets and right-of-ways are kept clean of mud, dust or debris. Dust abatement shall be maintained by adequate watering of the site by the Contractor.
35.Unless otherwise noted, all grading, rocking and paving to conform to OSSC (ODOT/APWA) Specifications, 2015 edition.
36.Clear and grub within work limits all surface vegetation, trees, stumps, brush, roots, etc. Do not damage or remove trees except as approved by the engineer or as shown on the drawings. Protect all roots two inches in diameter or larger on trees which are not scheduled for removal.
37.Strip work limits, removing all organic matter which cannot be compacted into a stable mass. All trees, brush and debris associated with clearing, stripping or grading shall be removed and disposed of off-site. Fills are not to be placed prior to approval of striping limits and depths and concurrence of such approval by the City.
38.Immediately following fine grading operations, compact subgrade to 95% of the maximum dry density per AASHTO T-180 test method (Modified Proctor). Subgrade must be inspected and approved by the City prior to placing embankments or base rock.
39.Engineered fills shall be constructed and compacted in 6" lifts over approved subgrade. All fills within public right-of-ways and easements shall be engineered, with each lift compacted to 95% of the maximum dry density per AASHTO T-180 test method (Modified Proctor).
40.All fills outside of public right-of-ways which are within potential building envelopes shall be engineered and comply with the Oregon Structural Specialty Code, with each lift compacted to 90% of the maximum dry density per AASHTO T-180 test method (Modified Proctor). Fills outside of building envelopes which are over 12-inches in depth shall also be engineered and compacted.
41.Unless otherwise shown on the drawings, straight grades shall be run between all finish grade elevations and/or finish contour lines shown. Finish pavement grades at transition to existing pavement shall match existing pavement grades or be feathered past joints with existing pavement as required to provide a smooth, free draining surface.
42.Contractor is responsible for coordinating with the City for the following proof-rolls (witnessed by the City, with a fully loaded rock truck). Performance of proof-rolls summarized below are required for all public street, fire lane or common use driveway improvements. Performance of a proof-roll does not replace the requirement for density testing where specified or where required by City standards.
--Subgrade proof-roll - prior to fabric or baserock placement
--Curbline proof-roll - prior to placement of curb & gutter
--Finished rock proof-roll-prior to paving
If the subgrade is disturbed after the subgrade proofroll, or if inclement weather (ie. significant rain) occurs between the time any proof roll is performed and baserock placement, curb placement or paving, another proof roll may be required by the City.
43.Crushed granular baserock shall conform to the requirements of OSSC (ODOT/APWA) 02630.10 (Dense Graded Base Aggregate), with no more than 10% passing the #40 sieve and no more than 5% passing the #200 sieve, and shall be approved by the City prior to placement.
44.Compact granular baserock to 95% of the maximum dry density per AASHTO T-180 test method (Modified Proctor). Prior to placing AC pavement, written compaction test results for baserock and trench backfill must be received by the City, and a finished rock grade proof-roll (witnessed by the City) must be performed.
45.Paving of streets shall not be allowed until after completion 1of all of the following as a minimum, including submittal of acceptable written test results to the City where applicable:
--all required testing, inspection and proofroll of baserock;
--installation and testing of all new water, sewer and storm drain lines under paved areas (including trench compaction testing and submittal of test results to the City, and testing of toning wire by the City);
--review and approval of the franchise and/or private utility plans by the Public Works Director; and
--installation of all franchise utilities or sleeves located under or crossing paved areas, curbs or sidewalks.
46.AC Pavement shall conform to OSSC (ODOT/APWA) 00744 (hot mixed Asphalt Concrete (HMAC) Pavements) for standard duty mix, and shall be approved by the City prior to placement. Unless otherwise approved in writing by the City (prior to paving), base course paving shall be 3/4 inch dense graded mix and wearing/leveling course paving shall be 1/2 inch dense graded mix (Level 2 JMF for local streets/parking lots/fires lanes, and Level 3 JMF for collector/arterial streets).
47.AC Pavement shall be compacted to a minimum of 91% of maximum density (at all locations) as determined by the Rice standard method, based on nuclear density testing.
48.Pavement surface shall be a smooth, well-sealed, tight mat without depressions or bird baths. Bony or open graded pavement surfaces shall be repaired to the satisfaction of the City, prior to final acceptance of the work.
49.HMAC mixtures shall be placed only when the surface is dry and weather conditions are such that proper handling, finishing and compaction can be accomplished. In no case shall HMAC mixtures be placed when the surface temperature is below the minimum established under 2015 OSSC (ODOT/APWA) 00744.40 (Season and Temperature Limitations) or the project specifications, whichever is more stringent.
50.Contractor shall protect new pavement against traffic as required, until it has cooled sufficiently to avoid tracking.
51.All existing or constructed manholes, cleanouts, monuments, gas valves, water valves and similar structures shall be adjusted to match finish grade of the pavement, sidewalk, landscaped area or median strip wherein they lie.
52.Street pavement widening cross slope shall be a minimum of 2% and a maximum of 5% except at intersections, where the street cross slopes shall not exceed 2% maximum (intersection defined from end of curb radius both directions) to comply with ADA and PROWAG standards. Prior to placing curbs, Contractor shall field verify pavement widening cross slope and contact City if the design pavement widening cross slope is not within the limits stated above.
53.All street signs, traffic control signs, curb & pavement painting or striping, and/or reflectors shall be installed (in conformance with City and MUTCD standards) prior to requesting final inspection by the City. All crosswalk striping and roadway emblems shall be thermoplastic.
54.Unless otherwise shown on the drawings, no cut or fill slopes shall be constructed steeper than 2H:1V maximum.
55.All planter areas shall be backfilled with approved top soil minimum 8" thick. Stripping materials shall not be used for planter backfill.
56.Contractor shall hydroseed all exposed slopes and disturbed areas which are not scheduled to be landscaped.
57.Grading shown on the drawings is critical to functioning of detention system and shall be strictly followed.
58.Contractor shall coordinate and ensure that detention volumes are inspected and approved by public agencies having jurisdiction prior to paving and landscaping.