FLOOD03098

• County: Larimer
• Community: Fort Collins
• Stream Name: Cooper Slough, Boxelder Creek
• Basin: South Platte
• Title: Master Drainageway Planning Study
• Date: 8/1/1981
• Prepared For: Larimer County
• Prepared By: Simons Li & Associates Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

~

I

I

I

LIST OF TABLES (continued)

Table 22. Alternative 2, Design Data for Conceptualized
Grasslined Channel ...... .....

. . .

I

Table 23.

I

Table 24.

Table 25.

I

Table 26.

I

Table 27.

I

Alternative 2, Design Data for Conceptualized
Crossings for Cooper Slough . . . . . . . . .

. ...

Alternatives 2 an 3, Design Data for Conceptualized
Channel Crossings for Boxelder Creek " . . . . .

. . . . .

Alternative 3, Design Data for Sizing Detention
Pond . . . . . . . . . . . .. ...

. . . .

Alternative 3, Design Data for Culverts Along
Slough . . . . . . . . . .

Cooper

Summary of Unit Costs for Construction

. . . . . . .

Table 28. Alternatives 2 and 3, Boxelder Creek Reach 1 Quantities
and Cost Estimate for 2000 cfs Design Channel Improvements

I

Table 29.

I

Table 30.

I

Table 31.

I

Table 32.

I

Table 33.

I

Table 34.

I

Table 35.

Alternatives 2 and 3, Boxelder Creek Reach 2 and 3,
Channel Crossing Improvements at Lake Canal and
Larimer-Weld Ditch (not included in economic analysis)

Alternatives 2 and
Storage Quantities
of Cooper Slough

3, Cooper Slough Reach 2 Detention
and Cost Estimate for Pond West

. . . . . . . . .

. . . . .

Alternative 2, Cooper Slough Reach 1 Quantities and
Cost Estimate for 10-Year Design Channel Improvements

. . . .

Alternative 2, Cooper Slough Reach 1 Quantities and
Cost Estimate for 50-Year Design Channel Improvements

Alternative 2, Cooper Slough Reach 1 Quantities and
Cost Estimate for 100-Year Design Channel Improvements

. . .

Alternative 2, Cooper Slough Reach 2 Quantities and
Cost Estimate for 10-Year Design Channel Improvements

. . . .

Alternative 2, Cooper Slough Reach 2 Quantities and
Cost Estimate for 50-Year Design Channel Improvements

I

Table 36. Alternative 2, Cooper Slough Reach 2 Quantities and
Cost Estimate for 100-Year Design Channel Improvements

I

Table 37. Alternative 3, Cooper Slough Reach 2 Detention Storage
Quantity and Cost Estimate, State Highway 14 .....

I

I

x

Page

65

66

66

68

68

70

71

72

73

74

75

76

77

78

79

80

I

I

LIST OF TABLES (continued)

Page

I

Table 38. Alternative 3, Cooper Slough Reach 2 Detention Storage
Quantity and Cost Estimate, Upstream of Colorado
and Southern Railroad . . . . . . . . . . . .

81

I

Table 39. Alternative 3, Cooper Slough Reach 1 Quantity and
Cost Estimate for Channel from State Highway 14 to
Boxelder Creek . . . . . . . . . . . . . . 82
Table 40. Summary of Cost Estimates for Alternative 2 for 10-Year
Design Frequency . . . . . . . . . . . . . . . . . . . 83
Table 41. Summary of Cost Estimates for Alternative 2 for 50-Year
Design Frequency . . . . . . . . . . . . . . 84
Table 42. Summary of Cost Estimates for Alternative 2 for 100-Year
Design Frequency . . . . . . . . . . 85
Table 43. summary of Cost Estimates for Alternative 3 86
Table 44. Benefit/Cost Comparison . . . . . . 90
Table 45. Total Improvement Economic Analysis 90

I

I

I

I

I

I

I

I

I

I

'.

I

I

I

xi

I

_I