1. REQUIREMENTS
    1. For all earthwork, the Designer shall include provisions for utilizing geotextile fabric, and over-excavation for times when conditions warrant.
    2. All aggregate base rock, asphalt, and other materials are to be specified in accordance with the latest version of standard construction specifications of the local jurisdiction.
    3. Pea gravel is not permitted as bedding or fill material.
    4. All base rock under asphalt and concrete paving sections should be ¾”-0”, and specified for compaction to a minimum 95% of ASTM D1557.
    5. All layers of base rock shall be compacted at a maximum depth of 12-inches.
    6. The Designer needs to include provisions in the specifications requiring the Contractor to coordinate for special testing, including compaction tests, asphalt placement, and concrete placement.

  2. EROSION CONTROL
    1. The Designer needs to show that the erosion control shall be installed in accordance with the local jurisdiction requirements, and be approved by the OSU Project Manager prior to the commencement of any grading.
    2. All erosion control information shall be clearly indicated on plans and specifications and designed in a manner consistent with all applicable code requirements.
    3. Designer shall show that sediment and erosion control barriers within tree protection areas shall not be installed below the existing soil surface utilizing trenching or other excavation methods that will adversely affect tree root zones. Sediment fencing shall be anchored utilizing surface weighted fiber filled mesh filtration bags or similar approved system.
    4. Designer shall show that the Contractor is responsible to apply and obtain an erosion control permit from the local jurisdiction prior to commencing any grading activities on the project site.  The approved permit shall be obtained from the local jurisdiction and provided to the OSU Project Manager prior to the beginning of construction.
    5. The Designer is responsible to determine if a NPDES 1200 – C permit is required for the project. Permit application to be coordinated with OSU Project Manager.
    6. All erosion control measures required for a NPDES 1200 – C permit shall be indicated on an Erosion Control Measures drawing which is to be prepared by the Designer, and included in the plan set.
    7. The Designer shall coordinate the preparation of the Erosion Control Measures drawing with the OSU Project Manager.
    8. The DEQ NPDES 1200-C permit shall be obtained prior to commencing any grading activities on the project site.
    9. Termination of the NPDES 1200-C permit shall be addressed in the Contract Documents and coordinated with the OSU Project Manager.

  3. GRADING
    1. The Designer shall show that the contractor is responsible to apply for and receive a grading permit from the local jurisdiction, and submit a copy to the OSU Project Manager prior to the commencement of any grading on the site.

  4. TREE PROTECTION
    1. The Designer needs to show clearly labeled six foot wire mesh tree protection fencing per the local jurisdiction requirements, with direction to the contractor for implementation.
    2. Refer to OSU Construction Standards 01 56 39 Temporary Tree and Plant Protection for additional guidance.