S-15-0109_Plans-_Sheet_2_of_2.docx

Donner Summit PCT Trailhead Overlay Design Notes

1. Crack Cleaning and Sealing

a. Will be paid as lump sum as pay item 818(01).

b. Estimated linear feet for existing cracks.

i. < ¼” width 711 linear feet.

ii. ¼” – 1” width 3,983 linear feet.

iii. > 1” width 991 linear feet.

2. Tack coat (SS1H) shall be applied at a rate of 0.2 gallons per square yard.

3. Asphalt overlay shall

a. Meet Caltrans PG 64-16 ½ mix design.

b. Be installed at a depth of 2 inches.

c. Cover all existing asphalt within project area.

4. New AC areas shown on the Plan View (sheet 1 of 2) shall

a. Have 6 inches of compacted aggregate for base.

b. Have an asphalt depth of 3 inches.

c. Have the same finished elevation as the overlay.

5. Concrete pad shall

a. Have 4 inches of compacted aggregate for foundation.

b. Have a concrete depth of 4 inches.

c. Have #4 rebar every 18 inches on center. Rebar is incidental to pay item 601(03).

d. Have finished surface that matches the elevation of the finished asphalt surface.

6. Excavated material from the new AC areas and the concrete pad location shall be used as shoulder backing on all edges of the finished asphalt. Shoulders shall be 1 foot minimum width.

7. Sign and Delineators

a. All locations will be identified on the ground by the engineer.

b. All signs and delineators shall be installed on metal U-Channel sign posts at a depth of 2 feet.

c. RG-130 (Liter Container) sign shall be 18”x18” in size.

i. Install with bottom edge of sign at a height of 5 feet from finished AC surface.

d. Type 2 Delineators (OM2-2V) shall be white in color, retro reflective and 3”x12” in size.

i. Install with bottom edge of delineators at a height of 3 feet from finished AC surface.

ii. Delineators shall be facing oncoming traffic.

8. Access to the Pacific Crest Trail shall remain open to the public.

a. It is the contractor’s responsibility to identify and provide safe public access through the project area for pedestrians. Public parking for the trailhead will be available adjacent to the project area.

Sheet 2 of 2