2006-06-12_REVISION - M1982015 ‎(25)‎

• Permit No: M1982015
• IBM Index Class Name: Revision
• Doc Date: 6/12/2006
• Doc Name: Response to Adequacy Review - Main Packet
• From: Meurer & Associates Inc
• To: DMG
• Type & Sequence: AM1
• Media Type: D
• Archive: No

Ms. Deb GBnima
June 12, 2006
Page 10 of 12
11.The proposed spillway
overtopping locations
spillways were model
hydraulic model conta
total inflow of approx
where it re-enters the
spillway is located at
enclosed CLOMR stuc
along the St. Vrain Rig
have been located and provided at the historic
at currently exist along the lake/river embankment. The
as a lateral wier condition within the HEC-RAS
ed within the CLOMR. Three inflow spillways allow a
ately 730 cfs. This flow is routed within the lakes,
per channel at the outflow spillway. The outflow
e easterly end of the large lake. Please refer to the
for detailed hydraulic information related to flood events
r and lake edge.
12.A structural analysis for minimum width of soils between slurry wall and river is
included in Terracon's "Global Slope Stability Analysis for Embankment/Slurry
Wall Construction and Impact Assessment for Existing Manmade Structures".
Enclosed
13.Reference June 5, 2006 memorandum from Applegate Group, Inc. Tab 6
14.Reference June 5, 20Q6 memorandum from Applegate Group, Inc. Tab 6
15.Reference June 5, 2006 memorandum from Applegate Group, Inc. Tab 6
16.Cross Sections of the (ponds are included in this response. Tab 13
17.Reference June 5, 20i 6 memorandum from Applegate Group, Inc. Tab 6
18.The rip rap protectionfor the lake embankment (St. Vrain river side) was
designed for the 100-year storm event. See Terracon Report dated June 2,
2006 that addresses global stability and impact assessment for existing
manmade structures. We have provided a proposed condition map from the
CLOMR study that includes the floodway, 100-floodplain and elevations, and
slurry wall location. Enclosed
19.A revised opinion of probable cost for the pond reclamation is attached. The
total opinion of cost for the reclamation of the ponds is 52,167,022. Tab 15
r
20.Carma is working with ERO Resources to delineate wetlands and jurisdictional
waters along the St. Vrain Creek. Efforts will be taken so that wetlands are not
disturbed and that nog construction will take place below the creek's high water
line. Coordination efforts will take place with the Army Corps of Engineers.
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