20071470_Reports_20071127

Attachment A
R-2635, Western Wake Tollway
Wake County, N C
I Analysis of NCTA's Estimated Impacts
1 ) Data from Reevaluation Report (Table 17)
All Systems
Uplands (Terrestrial forests) 645 7 acres
Man-altered 279 3 acres
Wetlands 20 1 acres
Ponds +12 1 acres
957.2 acres
2 ) Project length 12 6 miles x 5,280 feet/mile = 66,528 feet
3 ) Corridor width 300 feet (?) x 66,528 feet = 19,958,400 square feet
4 ) Corridor impact area 19,958,400 sq ft /43,560 sq ft /acre = 458 2 acres
5 ) Interchange (5) estimates from various Figures in the report
A) Green Level Road 58 1 acres
B) US 64 63 8 acres
C) Old US 1 26 9 acres
D) US 1 139 9 acres
E) NC 55 Bypass + 82 9 acres
3716 acres
6 ) Total construction `footprint' 458 2 acres + 3716 acres = 829.8 acres
II NCTA's Proposed Typical Section (from Table 18)
1) Six-lanes 12 feet/lane x 6 lanes = 72 feet
2) Median width 78 feet
3) Shoulders Outside 14 feet + Median 12 feet = 26 feet
4) Construction slope stakes (typical) 25 feet on each side = 50 feet
Total 226 feet
III Adjusted Corridor Impact Area
1 ) 226 feet construction footprint x 66,528 feet = 15,035,328 square feet
2 ) 15,035,328 square feet / 43,560 sq ft / acre = 345.2 acres
IV Adjusted Total Construction Impact Area (including Interchanges)
1 ) 458 2 acres + 345 2 acres = 803.4 acres
957.2 acres vs. 803.4 acres?