FLOOD01339

• County: Larimer
• Community: Loveland
• Stream Name: Big Thompson River
• Title: Application to the Federal Energy Regulatory Commission for a License to Re-construct, Operate, and Maintain the Loveland Project
• Date: 11/1/1977
• Prepared For: FERC
• Prepared By: Loveland
• Floodplain - Doc Type: Miscellaneous

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ATTACHMENT A

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COLORADO · 80537

· (303) 667-613C

. LOVElAND

Maurice E. Day
August 24, 1977

Idrlwilde Dnm, Loveland, CDlorado
Big Tho,npson River

CHANGES IN BASIC DESlr.N

Th8 following changes in basic design of Idylwilde Dam were
proposed in Conferenc8 with Jean Marchand, John Deines, Brad Seitz
Dnd myself Dn MDnday, August 22, 1977. Marchand later called me
indicating apprDval by the City Df Loveland.

The crest Df the DverflDw weir is IDwered 7 feet to elevatiDn
W17.

The nDrmal pDDl level is set at 6016.5 allDwing 6 inches Df
freebDard to be used if required for regulation.

The penstock invert remains at elevatiDn 6009.5 and the tDP of
the 36-inch piP8 roughly elevation 6012.5. This prDvides 4 feDt
which is ample subm~rgence since the required energy head ct the in-
let is less than 2 feet.

The butt8rfly cDntrDl valve is eliminated and shutoff cDntrol
at the inlet will be accDmplished by a sliele gate. The gate will be
mDtor operat3d with a pushbutton contrDl station on the left bank
(highway sido).

A trashrnck will be providaj at the penstDck inlGt, A platfDrm
will be prDvided fDr raking. Bar spacing will be determined after the
recommendations of the turbir.s mC!!'lUfacturei" al'e received. The trash-
rack may be used fDr stcplD~ging the inlet tD parmit r8~Dval Df the
gata if required. A grating will be prDvided in the plutform for