2009 - Illinois DNR - State of Illinois

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damages for 59 structures currently located in the 100-year frequency floodplain,including most of the floodprone structures around Lake Mary Anne on Farmers Creek.Project costs of this alternative are estimated at $5,862,513 including $1,036,277 inestimated land rights costs, as detailed on Table 22. Although this alternative eliminatesmany of the flood damages in the watershed, the benefit to cost ratio (B/C ratio) for thisalternative is low ( 0.33) due to many overlapping project benefits for the samefloodprone structures.Exhibit 27: Alternative D1 - Combine Alternatives C2, C6 and S1181
Table 22: Alternative D1 - Combine Alternatives C2, C6 and S11 Cost EstimateFarmer/Prairie CreekAlternative D1 Cost Estimate Aug 04Line Unit TotalItem Item Quantity Unit Price CostAlt. S1 Dude Ranch Alternative 1 Each $244,825 $244,825Alt. S3 LGH Alternative 1 Each $227,117 $227,117Alt. S5 High School Alternative 1 Each $1,472,885 $1,472,885Alt. S8 Belleau Lake Alternative 1 Each $66,651 $66,65154213723 Precast Reinf. Conc. End 1 Each $3,000 $3,00054010504 60" Concrete Pipe 4200 Ft $255 $1,071,00060248000 Junction Chamber N1 1 Each $12,000 $12,00060221100 Manhole 9 Each $2,200 $19,80020800150 Trench Backfill (Road) 2178 CY $28 $60,97844000100 Pavement Removal 3267 SQ $6 $19,56744100100 Pavement Replacement 3267 SQ $75 $245,000C2 Contingencies (15%) and Mobilization (6%) of subtotal $300,58254010706 Concrete Box Culvert 7X6 28 Ft $300 $8,40050300225 Concrete Structures 22 CU $550 $12,10050800105 Reinforcement bars 1070 Lbs $1 $1,07044000100 Pavement Removal 22 SQ $6 $13044100100 Pavement Replacement 22 SQ $75 $1,63320200100 Excavation 984 CY $11 $10,726250***** Seeding/Mulching/Fertilizin 0.28 Acres $2,000 $550C6 Contingencies (15%) and Mobilization (6%) of subtotal $7,268Construction Cost $3,785,283Engineering (20%) and Construction Supervision (7.5%) $1,040,953Alts. S1,S3,S5 Right-of-Way Cost* 976377 SQ FT $1 $976,377Alt. C6 Right-of-Way Cost 11980 SQ FT $5 $59,900Alts. S8, C2 Right-of-Way Cost** 749320 SQ FT $0 $0Total Project Cost $5,862,513Alternative Average Annual Cost (5.375% For 50 Years) $339,912O&M (1%) $37,853Alternative Average Annual Cost and O&M (1%) $377,765Baseline Average Annual Damages (Direct and Indirect) $144,531Alternative Average Annual Damages (Direct and Indirect) $18,038Alternative Average Annual Benefits $126,493Benefit Cost Ratio 0.3382
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Alternative C5 - Pipe From Lutheran
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27. Alternative D6 - Combine Altern
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As shown in Exhibit 1, the study ar
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construct addition flood water stor
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PURPOSE AND AUTHORITYThis report hi
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infrastructure and commercial devel
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Central Road20120220620420710110410
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TABLE 3: CRITICAL DURATION DETERMIN
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Prairie Creek is modeled as a singl
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TABLE 5 CONTINUED: CALIBRATION DATA
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average annual damages under existi
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EXHIBIT 5: SAMPLE FLOOD DAMAGE COMP
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DAMAGE RESULTS TABLE 8PLAN DESCRIPT
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FLOOD DAMAGE REDUCTION ALTERNATIVES
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STORAGE IMPROVEMENTSALTERNATIVE S1
Page 38 and 39: Table 9: Alternative S1 - Dude Ranc
Page 40 and 41: Exhibit 7: Alternative S2 - Good Av
Page 42 and 43: ALTERNATIVE S3 - LUTHERAN GENERAL H
Page 44 and 45: Table 11: Alternative S3 - Lutheran
Page 46 and 47: Exhibit 9: Alternative S4 - Luthera
Page 48 and 49: ALTERNATIVE S5 - HIGH SCHOOL RESERV
Page 50 and 51: Table 13: Alternative S5 - High Sch
Page 52 and 53: Exhibit 11: Alternative S6 - Bellea
Page 54 and 55: ALTERNATIVE S7 - LAKE MARY ANNE PUM
Page 56 and 57: Table 15: Alternative S7 - Lake Mar
Page 58 and 59: Exhibit 13: Alternative S8 - Bellea
Page 60 and 61: ALTERNATIVE S9 -COMBINED STORAGE AT
Page 62 and 63: normal flows to bypass the lake in
Page 64 and 65: Table 17: Alternative S9 - Combined
Page 66 and 67: An additional 50 acre-feet flood st
Page 68 and 69: Table 18: Alternative S10 - Combine
Page 70 and 71: the flood storage at the site by ap
Page 72 and 73: Table 19: Alternative S11 - Combine
Page 74 and 75: Exhibit 17: Alternative S12 - Dude
Page 76 and 77: CONVEYANCE IMPROVEMENTSALTERNATIVE
Page 78 and 79: ALTERNATIVE C3 - DEMPSTER STORM SEW
Page 80 and 81: ALTERNATIVE C5 - PIPE FROM LUTHERAN
Page 82 and 83: ALTERNATIVE C7 - REPLACE RANCHO LAN
Page 84 and 85: OTHER IMPROVEMENTSALTERNATIVE L1- P
Page 86 and 87: COMBINATION IMPROVEMENTSALTERNATIVE
Page 90 and 91: Table 22 Continued: Alternative D1F
Page 92 and 93: Hospital property, north of Dempste
Page 94 and 95: Table 23: Alternative D2 - Combine
Page 96 and 97: sewer system would be restricted to
Page 100 and 101: sewer system would be restricted to
Page 104 and 105: Exhibit 31: Alternative D5 - Combin
Page 106 and 107: ALTERNATIVE D6 - COMBINE STORAGE AL
Page 114 and 115: Exhibit 34: Alternative D8 - Combin
Page 116 and 117: ALTERNATIVE D9 - COMBINE STORAGE AL
Page 118 and 119: Existing flood damages along Lower
Page 120 and 121: Table 30 Continued: Alternative D9F
Page 126 and 127: ALTERNATIVE D11 - COMBINE STORAGE A
Page 128 and 129: Exhibit 37: Alternative D11 - Combi
Page 130 and 131: Table 32 Continued: Alternative D11
Page 133: ALTERNATIVE D13: PRAIRIE CREEK CULV
Page 136 and 137: community can realize additional re
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concrete block or brick veneer over
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CONCLUSIONSFarmers and Prairie Cree
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costs to construct these improvemen
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S1S2S3S7S8S12S11S9D7TABLE 33 Farmer
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2009 - Illinois DNR - State of Illinois

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