Attch_2_RussellPondRd_PlanClarification.docx

Russell Pond Road Reconstruction Pemigewasset Ranger District White Mountain National Forest Thornton/Woodstock, New Hampshire

Plan Clarifications A. Design Plan Notes:

1. All Sheets: Scales may not be as indicated on the drawings.

2. Sheets 5&6: Item #33218 Crushed Stone/Stone Bedding is to conform to gradation for ADS pipe bedding/backfill requirements for Class I (structural) fill. Gradation can be found on Table 5-2 “Classes of Embedment and Backfill Materials” of the ADS, Inc. Drainage Handbook. A link to the current (Accessed December 2015.) version is below. Material shall conform to AASHTO M43 size #67 stone.

http://www.ads-pipe.com/pdf/en/ADH5-Installation_December_2015.pdf

3. Sheet 6: Items # 60203 Corrugated Metal Pipe Arches shall be 16 gauge (minimum structural thickness of 0.064”) or thicker.

4. Sheet 6: Ditch Block typical section Aggregate Base should read Item #30103.

5. Sheet 40: On the Plan View, the leader near Sta. 93+50 pointing at rock hatching should read “Construct stone lined ditch. See Detail Sheet 6 of 69.”

6. Sheet 43: Both roadway typical sections: Item #30319 Roadbed Reconditioning should read Compaction Method B.

7. Sheet 43: Both roadway typical sections: Recondition Existing Ditch leaders should read Item #30304.

8. Sheet 43: Add a note on the typical sections that Item # 30805 Bedding and Backfill Aggregate material shall be used where necessary to bring up vertical profile of roadbed.