public information meeting dam and surge tank public … · logan hydroelectric project no. 2 logan...

LOGAN HYDROELECTRIC PROJECT NO. 2

Logan City Light and Power Department

3rd Dam and Surge Tank Construction Improvements

Public Information Meeting

August 2, 2018

5:00 p.m.

Safety Share: Highway Work Zone Safety

Utah highways in 2016 experienced 3,024 vehicular crashes in work zones, causing 1,229 injuries and 11 fatalities

Tips for Drivers Traveling in Work Zones:• Stay alert and minimize distractions• Obey posted signs• Follow the posted speed limit

In order for all of us to go home safe to our families each night, we need everyone to do their part.

Purpose of 3rd Dam and Surge Tank

Construction Improvements

FERC Inspection Identified Concrete Deterioration

FERC Inspection Identified Surge Tank

Cover Concrete Deterioration

Logan City Plan Filed with FERC in Response to Inspection

Replace Gatehouse

Wall

Replace Spillway Gates

Replace Spillway Steps

Replace Spillway Walls

Replace Gatehouse

Remove Sediment

Replace Surge Tank Roof

Place Rock

Riprap

Remove Bypass

Pipe Install Stilling Basin

Public Information Meeting Overview

• Primary Construction Improvements Summary

• Construction Schedule Summary

• Public Safety Information Summary

– Temporary Trail Detours

– Temporary Public Road Closures

– Temporary Public Road Lane Closures

• Address Questions Following Presentation

Primary Construction Improvements Summary

Replace spillway crest gates with Obermeyer weir panels

Spillway crest gates

Obermeyer weir panels –view looking downstream

Obermeyer weir panels – view looking upstream

Air bladders inflated


Spillway abutment walls

Replace spillway abutment walls


Dam abutments

Protect dam abutments with

rock riprap


Spillway steps and concrete slabs

Stabilize spillway steps and replace

concrete slabs


End of spillway

Add a concrete stilling basin at end

of spillway for energy dissipation

of river flow


Gatehouse

Replace gatehouse, gatehouse wall, intake weir, and minimum flow

bypass

Intake weir (inside gatehouse)

Minimum flow bypass

Gatehouse wall


Replace intake trash rack and rehabilitate/raise

trash rake

Trash rake

Intake trash rack


Replace low-level sluice gate and sluiceway walls

Sluiceway walls

Low-level sluice gate (under wall)


Rehabilitate upstream concrete

dam face

Upstream concrete dam face

(below water surface)


Replace surge tank roof and repair surge tank walls

Surge tank roof

Surge tank walls

Future Construction Improvements

Sediment dredging in the reservoir

upstream from 3rd

Dam will be performed after

construction improvements are

completed

Sediment Bar

Sediment Deposit with Cattails

Construction Schedule Summary

Surge Tank Construction Improvements Started July 23, 2018

Surge Tank Construction Improvements Completed by August 31, 2018

Third Dam Construction Improvements Start September 1, 2018

Spillway Improvements Worked on First

Intake/Gatehouse Improvements Worked on Second

Third Dam Construction Improvements Completed by May 17, 2019

Logan City, Stantec, Gerber Construction, Forest Service, and UDOT have planned for public safety during 3rd Dam and surge tank construction improvements

• Local websites/social media will be provided with periodic construction updates

• Temporary Trail Detours

• Temporary Public Road Closures

• Highway 89 Traffic Safety – Lane Closures

Public Safety Information Summary

• Cache County Trails webpage (www.trails.cachecounty.org)

• Cache Hikers website (www.cachehikers.org)

• Cache Valley Visitors Bureau website (www.tourcachevalley.com)

• Utah Trailhead website (www.utahtrailhead.com)

• Stokes Nature Center website (www.logannature.org)

• Logan City 3rd Dam Project web-page (http://www.loganutah.org/government/departments/light_and_power/index.php)

• Forest Service Logan District Ranger and Recreation Specialist for posting on UWCNF Twitter and Facebook accounts

Local Websites/Social Media to be Provided with Updates

http://www.trails.cachecounty.org/

http://www.cachehikers.org/

http://www.tourcachevalley.com/

http://www.utahtrailhead.com/

http://www.logannature.org/

http://www.loganutah.org/government/departments/light_and_power/index.php

Temporary Trail Detours – September 1 to May 17

Temporary Trail Detours – Public Information Signs

Temporary Trail Detours – Detour Signs

Temporary Trail Detours – September 1 to May 17

Temporary Public Road Closures – FR 20125

FR 20125 and Gus Lind Flat Dispersed Camping Area closed from September 1, 2018to May 17, 2019

Temporary Public Road Closures – FR 27044

FR 27044 closed from September 1, 2018 to May 17, 2019

Temporary Public Road Closures – Highway 89

Highway 89 Flagger-Controlled Temporary Closures For Less Than 15 Minutes Each Direction During Critical Construction Activities from September 1, 2018 to May 17, 2019

Temporary Public Road Lane Closure – Highway 89

Highway 89 Temporary Eastbound Lane Closure With Flagger-Controlled Alternating Traffic Each Direction During Critical Construction Activities from September 1, 2018 to May 17, 2019

• Logan City appreciates your patience, understanding and help in

protecting public and contractor safety during 3rd Dam and surge

tank construction improvements.

• Local websites and social media will be provided with periodic

updates during construction to help keep the public informed of

Project progress.

Thank You For Your Interest in 3rd Dam and

Surge Tank Construction Improvements Project

Questions

and

Answers

Logan City Light and Power Department

public information meeting dam and surge tank public … · logan hydroelectric project no. 2 logan...

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