FLOOD01452

• County: Larimer
• Community: Fort Collins
• Stream Name: Fossil Creek Drainageway Basin
• Title: Master Drainageway Planning Study
• Date: 8/1/1982
• Prepared For: Larimer County
• Prepared By: Simons Li & Associates Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Table 23.

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Table 24.

Table 25.

Table 26.

LIST OF TABLES (continued)

Page

Aggradation-Degradation Potentials for Fossil Creek and
Tributaries, Developed Conditions . . . . . .

. . .

48

Detention Data for Embankments, 100-year Flood -
Developed Conditions ....

50

Flood Damage Summary in Dollars

.

52

.

. .

.

Average Annual Flood Damage . .

53

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Table 27. Alternative 2, Design Data for Conceptualized Vegetated
Channel . . . . . . . . . . . . . . . . . . . . . . . 58

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Table 28. Alternative 2, Design Data for Conceptualized Channel
Crossings for Fossil Creek . . . . . . . . . . . . . . . . . 58

Table 29. Alternative 3, Design Data for Sizing Detention Ponds
and Outlets . . . . . . . . . . . . . . . . . 60

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Table 30.

Table 31.

Table 32.

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Table 33.

Alternative 4, Design Data for Raising Roads

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62

Summary of Unit Costs for Construction

.

63

. .

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Summary of Cost Estimates for Alternative 2, Channel
Improvements .............

64

Summary of Cost Estimates for Alternative 3 .

64

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Table 34. Summary of Cost Estimates for Alternative 4

65

Table 35. Benefit/Cost Comparison, Fossil Creek

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67

Table 36. Summary for Economic Analysis, Fossil Creek

69

68

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Table 37. Advantages and Disadvantages of Proposed Alternatives

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LIST OF PLATES

Plates

Flood Profiles Fossil Creek, Existing Conditions

1-18

Flood Profiles Fossil Creek, Developed Conditions

19-36

Flood Profiles Stanton Creek, Existing Conditions

37-39

Flood Profiles Stanton Creek, Developed Conditions

40-42

Flood Profiles Lang Gulch, Existing Conditions

43-50

Flood Profiles Lang Gulch, Developed Conditions

51-58

Flood Profiles Smith Creek, Existing Conditions

59-61

Flood Profiles Smith Creek, Developed Conditions

62-64

Flood Profiles Burns Tributary, Existing Conditions

65-69

Flood Profiles Burns Tributary, Developed Conditions

70-74

Index Map, Flooded Area

75

Flooded Area

76-106

Index Map, Preliminary Design

107

Preliminary Design, Alternative 3

108-125

Detail Sheet

126-127