2009 - Illinois DNR - State of Illinois

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Alternative C5 - Pipe From Lutheran General Hospital Pond Along Ballard ToPotter RoadAlternative C6 - Replace Rancho Lane CulvertsAlternative C7 - Replace Rancho Lane Culverts and Additional Dee Road PipeAlternative C8 - Confluence to Belleau Lake ConveyanceOTHER IMPROVEMENTSAlternative L1 - Parkview Lane CulvertCOMBINATION IMPROVEMENTSAlternative D1 - Combine Alternatives C2, C6 and S11Alternative D2 - Combine Alternatives C2 and S11Alternative D3 - Combine Alternatives C6 and S11Alternative D4 - Combine Alternatives C7 and S11Alternative D5 - Combine Alternatives C2 and S8Alternative D6 - Combine Alternatives C7 and S4Alternative D7 - Combine Alternatives C4 and S11Alternative D8 - Combine Alternatives C8 and S8Alternative D9 - Combine Alternatives C7, C8 and S11Alternative D10 - Combine Alternatives C6, C8 and S11Alternative D11 - Combine Alternatives C6, C8, S2, S5 and S8Alternative D12 - Prairie Creek Channel Improvement and Confluence ReservoirAlternative D13 - Prairie Creek Culvert/Swale and Confluence ReservoirNon-structural mitigation measures including such options as acquisition and demolitionof flood prone structures, relocation of flood prone structures, elevating flood pronestructures, flood insurance, and/or floodproofing of flood prone structures are alsoconsidered as a potential flood damage reduction alternative in the report.Based on the history of recurring Farmers and Prairie Creek flooding and flood damagesin the watershed, it is anticipated that substantial flooding and flood damages willcontinue to occur in Des Plaines, Park Ridge and unincorporated Maine Township unlessmeasures are implemented to prevent such damages. Exhibit 2 illustrates how theFarmers and Prairie Creek floodplains impact each of these communities.Table 33 provides a break down of estimated project and construction costs as well aswhat portion of each alternative’s construction costs could be covered by the capitalizedvalue of the flood damage reduction benefits potentially produced by that alternative.The capitalized value of the flood damage reduction benefits exceed the costs to3
construct addition flood water storage capacity at the Dude Ranch (alternative S1 andS12), Good Avenue Pond (Alterative S2), Lutheran General Hospital Pond (AlternativeS3), and at Belleau Lake (Alternative S8). Combined storage alternatives (AlternativesS9 and S11) and some of the combined storage and conveyance alternatives(Alternatives D3, D4 and D7), have capitalized flood damage reduction benefits thatexceed 75% of the costs to construct these improvements.To reduce the risk of flood damages in the watershed, Cook County MWRDGC and/orthe city of Des Plaines and/or the city of Park Ridge should:1. Work with the Illinois Department of Natural Resources, Office of Water Resourcesto further plan and implement additional flood storage capacity modifications atBelleau Lake, Dude Ranch, Good Avenue Pond, Lutheran General Hospital pond, ora combinations of these sites where the capitalized value of the flood damagereduction benefits exceed 75% the costs to construct addition flood water storagecapacity. Such work would be completed in accordance with the terms of a localproject sponsorship agreement outlined in this report;2. Work with the Illinois Department of Natural Resources, Office of Water Resourcesto further plan and implement combined storage and conveyance alternatives atRancho Lane and/or Dee Road where the capitalized value of the flood damagereduction benefits exceed 75% the costs to construct the improvements. Such workwould be completed in accordance with the terms of a local project sponsorshipagreement outlined in this report;3. Install a flap gate on the downstream (east) end of the 15-inch culvert underParkview Lane near Busse Highway, and consider raising portions of Parkview Laneand Busse Highway to provide additional freeboard protection against FarmersCreek flooding;4. Encourage the purchase of National Flood Insurance and enforce local floodplainordinances in accordance with National Flood Insurance Program guidelines toprevent future floodway encroachments (including temporary storage of equipmentand materials), diminish future flood damage potential, and minimize floodplaindevelopment in the watershed;5. Actively remove debris and logs from the Farmers and Prairie Creek to minimize thepotential for temporary flood profile increases due to log and debris jams in thechannel.4
Page 4: Alternative C5 - Pipe From Lutheran
Page 7 and 8: 27. Alternative D6 - Combine Altern
Page 9: As shown in Exhibit 1, the study ar
Page 14 and 15: PURPOSE AND AUTHORITYThis report hi
Page 16 and 17: infrastructure and commercial devel
Page 18 and 19: 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
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normal flows to bypass the lake in
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Table 17: Alternative S9 - Combined
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An additional 50 acre-feet flood st
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Table 18: Alternative S10 - Combine
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the flood storage at the site by ap
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Table 19: Alternative S11 - Combine
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Exhibit 17: Alternative S12 - Dude
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CONVEYANCE IMPROVEMENTSALTERNATIVE
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ALTERNATIVE C3 - DEMPSTER STORM SEW
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ALTERNATIVE C5 - PIPE FROM LUTHERAN
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ALTERNATIVE C7 - REPLACE RANCHO LAN
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OTHER IMPROVEMENTSALTERNATIVE L1- P
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COMBINATION IMPROVEMENTSALTERNATIVE
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damages for 59 structures currently
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Table 22 Continued: Alternative D1F
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Hospital property, north of Dempste
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Table 23: Alternative D2 - Combine
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sewer system would be restricted to
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sewer system would be restricted to
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Exhibit 31: Alternative D5 - Combin
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ALTERNATIVE D6 - COMBINE STORAGE AL
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Exhibit 34: Alternative D8 - Combin
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ALTERNATIVE D9 - COMBINE STORAGE AL
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Existing flood damages along Lower
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Table 30 Continued: Alternative D9F
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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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