Icicle Workgroup Presentation Eight-Mile Lake Appraisal Study - PowerPoint PPT Presentation

Icicle Workgroup Presentation Eight-Mile Lake Appraisal Study December 6, 2013 Mike Kaputa Dan Haller, PE Dave Rice, PE

OCR Grant Overview Eight-Mile Lake Restoration / Expansion Appraisal Study:  Build on TU reconnaissance / site investigation  Evaluate structural, operational, permitting, future use, and costs for four lake levels:  1,827 acre-feet  2,000 acre-feet  2,500 acre-feet  5,000 acre-feet Icicle Creek Water Resources Strategy Workgroup #7

Icicle Creek Water Resources Strategy Workgroup #7

Eight-Mile Lake Structural / Operational Overview  Masonry Rock/Concrete Wall and Earthen Embankment Dam  Earthen Embankment has Eroded at Masonry Rock/Concrete Wall  Masonry Rock/Concrete Wall is Partially Deteriorated  Spillway  Was Historically Controlled by Flash Boards at Opening in Masonry Rock / Concrete Wall  No Longer Controlled by Flash Boards, Debris in Spillway  Primary Spillway Well Appears to be Connected to Discharge Pipeline Icicle Creek Water Resources Strategy Workgroup #7

Eight-Mile Lake Structural / Operational Overview  Overflow Spillway Channel  Filled with Large Rock, Boulders  Cutoff Walls Downstream of Dam  Outlet Gate (Controls Flow to Discharge Pipeline)  Original Operator Damaged, Removed  Currently Operated by Inserting Come Along into Steel Piece Attached to Stem  Rock Above, Against Gate  Difficult to Operate and Fully Close Icicle Creek Water Resources Strategy Workgroup #7

Eight-Mile Lake Structural / Operational Overview  Discharge Pipeline  ~36” Corrugated Metal Pipe (CMP)  Submerged at Outlet, Rocks and Boulders  Unable to inspect submerged Inlet  Rough Measurements  ~10 Feet from Top of Wall to Spillway Inlet Crest  ~5 Feet from Spillway Inlet Crest to Water Surface  Outlet Pipe Invert ~8 to 9 Feet Below Water Surface Icicle Creek Water Resources Strategy Workgroup #7

Icicle Creek Water Resources Strategy Workgroup #7

Permitting Investigation Current focus is data gathering:  District files / institutional knowledge  Ecology files (water rights, dam safety, topic, adjudication files)  Chelan County Auditor (parcel ownership) and Superior Court (adjudication files)  DNR files  USFS files  BLM files Icicle Creek Water Resources Strategy Workgroup #7

Next Steps  Develop restoration / expansion approach  Conceptual design and cost estimates  Documentation of existing permit authority  Identification of required permit authority for each option  Documentation of benefits / beneficial uses  Operational changes  Appraisal Report Icicle Creek Water Resources Strategy Workgroup #7

Icicle Workgroup Presentation Eight-Mile Lake Appraisal Study - PowerPoint PPT Presentation

Icicle Workgroup Presentation Eight-Mile Lake Appraisal Study December 6, 2013 Mike Kaputa Dan Haller, PE Dave Rice, PE OCR Grant Overview Eight-Mile Lake Restoration / Expansion Appraisal Study: Build on TU reconnaissance / site

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Icicle Workgroup Presentation Eight-Mile Lake Appraisal Study - PowerPoint PPT Presentation

Icicle Workgroup Presentation Eight-Mile Lake Appraisal Study December 6, 2013 Mike Kaputa Dan Haller, PE Dave Rice, PE OCR Grant Overview Eight-Mile Lake Restoration / Expansion Appraisal Study: Build on TU reconnaissance / site

Icicle Creek Comprehensive Water Resources Strategy Workgroup Presentation Workshop #5 July

Icicle Workgroup Presentation IPID Pump Exchange Fatal Flaw Evaluation December 6, 2013 Mike

Principles of Conservation July 9, 2015 Dan Haller, PE Icicle Workgroup July 9, 2015

Programmatic EIS Update Icicle Work Group Meeting September 27, 2018 Note: Collation and

CD/MH Integration Workgroup The What and the How of integration CD Integration Workgroup

Flood Mitigation Workgroup 2 nd Workgroup Meeting Metro Hall, Room 106 May 18, 2015 Workgroup

Water Quality Standards Workgroup Introduction Purpose of WQS Workgroup This workgroup will

Flood Mitigation Workgroup 4th Workgroup Meeting Metro Hall, Room 106 June 1, 2015 Workgroup

Program &amp; Service Array Workgroup Workgroup Co-Chairs: Elizabeth Duryea 10/22/2020

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Jim Brown, WDFW Presentation Adapted from Tom Kahlers (Douglas PUD) Presentation to the Icicle

Flood Mitigation Workgroup 8 th Workgroup Meeting Louisville MSD Board Room July 20, 2015

Icicle Creek Water Resource Management Strategy January 14, 2015 Mike Kaputa Director Chelan

Total Cost of Care Workgroup January 25 th 2017 Workgroup Charge The initial charge of the TCOC

PASSE MEETING This event is sponsored by the TBI Advisory Board Workgroup, specifically the

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