2009 - Illinois DNR - State of Illinois

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Table 19: Alternative S11 - Combined Storage at Dude Ranch Pond Expansion WithLake Mary Anne Pump Station, Lutheran GeneralHospital Pond, High School Reservoir, and Belleau LakeLowered Cost EstimateFarmers/Prairie CreekAlternative S11 Cost Estimate Aug 04Line Unit TotalItem Item Quantity Unit Price CostAlt. S1 Dude Ranch Alternative 1 Each $244,825 $244,825Alt. S4 LGH with High School Alt. 1 Each $1,700,002 $1,700,002Alt. S8 Belleau Lake Alternative 1 Each $66,651 $66,651Construction Cost $2,011,478Engineering (20%) and Construction Supervision (7.5%) $553,157Right-of-Way Cost* 976377 SQ FT $1 $976,377Right-of-Way Cost** 719920 SQ FT $0 $0Total Project Cost $3,541,012Alternative Average Annual Cost (5.375% For 50 Years) $205,310O&M (1%) $20,115Alternative Average Annual Cost and O&M (1%) $225,425Baseline Average Annual Damages (Direct and Indirect) $144,531Alternative Average Annual Damages (Direct and Indirect) $22,904Alternative Average Annual Benefits $121,627Benefit Cost Ratio 0.54Frequency 1 2 5 10 25 50 100Existing Damaged Structures 0 1 2 11 38 64 96Alternative Damaged Structures 0 0 0 0 7 13 50Structures Removed from Floodplain 0 1 2 11 31 51 46* Estimated cost of securing a permanent flood easement.**$0.00 Assessed value because of current public ownership.65
ALTERNATIVE S12 - DUDE RANCH POND EXPANSIONThe Dude Ranch Pond, located south of Golf Road and east of the Tri-State Tollway,would be enlarged and connected to Farmers Creek to increase upper Farmers Creekstorage by 30 acre-feet. Storage in the pond would be controlled by a new 12-inchdiameter outlet pipe through a provisional Class 1 dam structure constructed in theFarmers Creek channel just downstream of the pond. Overflows from the existing IDOTGolf Road interceptor sewer would also be controlled by the expanded Dude RanchPond site.Added flood storage on Farmers Creek created by this alternative would provide $15,432in average annual flood damage reduction benefits in the watershed, representing an 11%reduction in average annual flood damages. This alternative would benefit all 43floodprone structures along Farmers Creek. Existing flood damages along LowerFarmers Creek would be reduced 29% Existing flood damages along Upper FarmersCreek would be reduced 12%. This alternative would eliminate flood damages for 7structures currently located in the 100-year frequency floodplain. Eight structures onLower Prairie Creek would also be slightly benefitted.Project costs of this alternative are estimated at $438,126, including 312,816 in landrights costs, as detailed on Table 20. The benefit to cost ratio (B/C ratio) for thisalternative is 0.58.66
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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
Page 21 and 22: TABLE 3: CRITICAL DURATION DETERMIN
Page 23 and 24: Prairie Creek is modeled as a singl
Page 25 and 26: TABLE 5 CONTINUED: CALIBRATION DATA
Page 27 and 28: average annual damages under existi
Page 29 and 30: EXHIBIT 5: SAMPLE FLOOD DAMAGE COMP
Page 31 and 32: DAMAGE RESULTS TABLE 8PLAN DESCRIPT
Page 33 and 34: FLOOD DAMAGE REDUCTION ALTERNATIVES
Page 36 and 37: 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 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 88 and 89: damages for 59 structures currently
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 110 and 111: Hospital property, north of Dempste
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
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Hospital property, north of Dempste
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Table 31: Alternative D10 - Combine
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ALTERNATIVE D11 - COMBINE STORAGE A
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Exhibit 37: Alternative D11 - Combi
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Table 32 Continued: Alternative D11
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ALTERNATIVE D13: PRAIRIE CREEK CULV
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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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