FLOOD01374

• Designation Number: 521
• County: Weld
• Community: Erie, Firestone, Dacono
• Stream Name: Tri-town drainageway, Godding Hollow Basin
• Title: South Weld I-25 Corridor Master Drainage Plan
• Date: 9/8/1999
• Prepared For: Weld County
• Prepared By: Anderson Consulting Engineers, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Figure 4,2
Figure 4.3
Figure 4.4
Figure 5.1
Figure 5.2
Figure 5.3
Figure 5.4
Figure 5.5
Figure 5.6
Figure 5.7
Figure 5.8
Figure 5.9
Figure 5.10
Figure 5,11
Figure 5.12
Figure 5.13
Figure 5.14
Figure 5.15
Figure 5.16
Figure 5,17
Figure 5,18

Figure 5.19

Table 3.1
Table 3.2
Table 4.1
Table 4.2
Table 4.3
Table 4.4
Table 4.5
Table 4.6
Table 4.7
Table 5.1
Table 5.2
Table 5,3
Table 5.4

TABLE OF CONTENTS (CONTINUED)

Discharge Profiles for Tri-Town Basin: Existing Conditions. . . . . . . .. 4.15
Discharge Profiles for Godding Hollow Basin: Future Conditions. .... 4.26
Discharge Profiles for Tri-Town Basin: Future Conditions. .... . . . .. 4,27
Godding Hollow and Tri-Town Basins Reach Locations, .....,...... 5.4
Godding Hollow Basin Proposed Drainage Improvements for Reach Gl. 5.5
Godding Hollow Basin Proposed Drainage Improvements for Reach G2, 5,6
Godding Hollow Basin Proposed Drainage Improvements for Reach G3. 5.7
Godding Hollow Basin Proposed Drainage Improvements for Reach G4. 5.8
Godding Hollow Basin Proposed Drainage Improvements for Reach G5. 5,9
Godding Hollow Basin Proposed Drainage Improvements for Reach G6. 5.10
Godding Hollow Basin Proposed Drainage Improvements for Reach G7. 5.11
Godding Hollow Basin Proposed Drainage Improvements for Reach G8. 5.12
Godding Hollow Basin Proposed Drainage Improvements for Reach G9. 5.13
Godding Hollow Basin Proposed Drainage Improvements for Reach GlO, 5.14
Tri-Town Basin Proposed Drainage Improvements for Reach T1 ' . . . .. 5.15
Tri-Town Basin Proposed Drainage Improvements for Reach T2. ,..., 5,16
Tri-TownBasin Proposed Drainage Improvements for ReachT3. ..... 5,17
Tri-Town Basin Proposed Drainage Improvements for Reach T4. .,... 5.18
Tri-TownBasin Proposed Drainage Improvements for Reach T5. ...,. 5.19
Tri-Town Basin Proposed Drainage Improvements for Reach T6, ...,. 5.20
Discharge Profiles for Godding Hollow Basin:
Future Conditions with Regional Detention, ,......,'......".. 5.39
Discharge Profiles for Tri-Town Basin:
Future Conditions with Regional Detention. ,...."...,.'"..., 5.40

TABLES

Inventory of Existing Drainage Facilities for the Godding Hollow Basin. .. 3.2
Inventory of Existing Drainage Facilities for the Tri-Town Basin. ...... 3.3
Hydrologic Parameters for Existing Conditions. . . . . . . . . . . . . . . . . . .4.4
Hydrologic Soil Groups Recommended Values (USDCM, Vol. I, 1978). . 4.6
Subbasin Peak Discharges for Existing Conditions. . . . . . . . , , . . . , ,. 4,11
Major Drainageway Peak Discharges for Existing Conditions . . . . . . .. 4,13
Hydrologic Parameters for Future Conditions. . . . . . . , . . . , , . , . . .. 4.20
Subbasin Peak Discharges for Future Conditions. ,. . . . . . . , , . . , . .. 4.23
Major Drainageway Peak Discharges for Future Conditions ......". 4.25
Cost Estimate for Godding Hollow Basin. . . . . . . . , , . . , . . . . . , . .. 5.31
Cost Estimate for Tri-Town Basin. ..,........"............ 5,32
Subbasin Peak Discharges for Future Conditions with Regional Detention. 5.34
Major Drainageway Peak Discharges for
Future Conditions with Regional Detention. ............"..... 5.36

IV

Janunry 17, 2000