FLOOD03506 - Laserfiche WebLink

Home Browse Search

------ I TABLE VII~3 I BENEFIT/COST COMPARISON STORAGE/CHANNEL IMPROVEMENTS SOUTH lAKEWOOD GULCH PHASE-A-ADDENDUM I OCTOBER. 1977 9 I 2 3 4 5 6 7 8 Average 10 II 12 13 14 15 50 yr. 6- 3/8% 50 yr. 6-3/8% Annual Average (5+7+8) (lv-II) (10/11 ) (9+11 ) Annua I i zed Annua I j zed Annual Flood Annua 1 Annual Annua I 50 yr. 6-3/8% Benefit/ I ADDENDUM Des i gn Construction Construction R-O-W R-O-W o & M Dama ge Damage Improvements Net Present Worth Cost Ann~a 1 Reach A I ternat i ve Frequency Cost Cost Cost Cost Cost Cost Reductions Cost Benefit of Net Benef it Rat 10 Cost Nonstructural 100 3.900 260 -0- -0- 200 510 -0- 460 460 - 6.890 970 I Strategy Detention Storage 105.400 7.040 71 .500 4.780 5.000 -0- 140 16.820 -16.680 -249.740 16.820 at Addenbrooke I Pond 30,040 450 IIA Nonstructural 100 2.010 3.700 250 2,450 10.710 2.710 8.000 119.780 3.95 5.160 I Strategy liB Status Quo 100 -0- -0- -0- -0- 70 1.330 1.970 70 1,900 28,450 28.14 1.400 Detention Storage 49,630 3.310 4,880 320 10,510 -0- 2.120 14,140 -12,020 -179.970 0.15 14.140 I at Rockmont Ponds III Grass-lined Channel 100 172 .510 11,520 32.160 2.150 2,630 -0- 42 ,290 16.300 25,990 389.140 2.59 16.300 I with European Chan. at Constrictions Retention Storage 61,200 4,090 53.600 3.580 3,290 -0- 13.130 10.960 2.170 32.490 1. 20 10,960 I at FI rst Avenue IV Nons t ruc tu ra 1 100 144.420 9.640 7,770 520 720 690 3.730 10.880 - 7.150 -107.050 0.34 11,570 Strategy I VA Conduit 100 332,480 22.210 15.040 1.000 880 -0- 42.840 24.090 18.750 280.730 1. 78 24.090 I VB Grass-lined Chan. 100 73.060 4.880 15.340 1,020 1.640 -0- 10.960 7.540 3.420 51.210 1.45 7,540 Near Reed St. Non- structural Strategy I elsewhere VC Concrete Flood Wall 100 10.660 710 -0- -0- 60 -0- 13.820 770 13.050 195.390 17.95 770 at Townhouses, Non- I Structural Strategy Elsewhere I TOTAL FOR ADDENDUM 983.300 65.670 203,990 13.620 25.450 4,980 141.710 104.740 36.970 553.540 1. 35 109.720 Al TERNATI VE I I VII-3 I