FLOOD09085

• Designation Number: 97
• County: Adams
• Community: Thornton
• Stream Name: Grange Hall Creek
• Basin: South Platte
• Title: Major Drainageway Planning - Grange Hall Creek, Phase B, Thornton, Adams County
• Date: 12/1/1977
• Designation Date: 1/19/1978
• Floodplain - Doc Type: Floodplain Report/Masterplan

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11-1

11-2

111-1

111-2
111-3

111-40

11I-4b

III-Sa

III-sb

III-sc

III-sd

IV-I

IV-2
IV-3

LIST OF TABLES

Basin - Jurisdiction Breakdown

Figure II-I

Land Use Summary

Figure 11-2

Figure 11-3

Bosin Characteristics Summary

Design Total Rainfall
Sample Computer Output Storm Hydrograph

Figure 111-1

Figure 111-2

Design Runoff Summary

Figure 111-3

Design Runoff Summary

Figure 111-4

Floodwoy Data
Floodway Data
Floodway Data

Figure 111-5

Figure 111-6

Floodway Data

Carpenter Dam Cost Comparisons

Unit Price Data

Summary of Improvement Costs

LIST OF FIGURES

General Location

General Study Area
Land Use Map

Drainage Basins

Rainfall Depth-Duration-Frequency Graph

Storm Hydrograph --
Grange Hall at 1-25

Storm Hydrograph --
Grange Hall at I~iverdale Hoad

Storm Hydrograph--
Tributary Sat 1-25

Storm Hydrograph --
Tributary S at 104th Avenue