FLOOD10330

• County: Summit
• Community: Silverthorne
• Stream Name: Blue River, Straight Creek, Willow Creek
• Title: Flood Insurance Restudy, Technical Support Data Notebook, Silverthorne, Summit County, Colorado
• Date: 1/16/1998
• Prepared For: Silverthorne
• Prepared By: Army Corps of Engineers
• Floodplain - Doc Type: Floodplain Report/Masterplan

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

Table 11. FIS Update Bridge Information
Stream Bridge Span Width No. HEC
Piers Method
Blue River
Wildernest Road 90' 42' Norm.
Pedestrian Bridge 131 ' 8' Norm.
Hi~hway 9 70' 67' 3 Spec.
6t Street 103' 49' 7 Spec.
Hamilton Cr. 64' 28' Norm.
Subdiv. Br. 45' IS' Norm.
Winegard Rd. 42' 15' Norm.
Straight Cr.
Ped. Br. I 24' 8' Norm.
River Rd. 12' 34' Norm.
Ped. Br. 2 64' 10' Norm.
Stephen's Way Br. 25' 28' Norm.
U.S. 6 24' 110' Norm.
Willow Cr.
Ranch Bridge 2 27' 12' Norm.
Ranch Bridge 1 15' 11 ' Norm.
Highway 9 75' 111 ' Norm.
Subdiv. Road 17' 41 ' Norm.

The majority ofthe bridges are simple structures, often with single spans. The
Normal Bridge method was used for these cases. The Special Bridge method was used
for two bridges across the Blue River at Highway 9 and 6th Street. Both bridges have
multiple piers. The Special Bridge method provides a better estimate of energy losses
associated with piers, so it was used in these cases.

2.3 Supporting Analysis

2.4 Key to Cross-Section Labeling

2.5 Key to Transect I..abeling