-I-II I r.J.rJ I I rJIrl rI-rJIr I I - rI-r rJ rJII-r?l rI- . rl rI-rrl - -r Jr - -r -r -rJIl -I'II-'h--I-I--I??I?lhIrl-Jrl Ilif?JIIJ .lfll+ Illf?rlfl'fl'dl EI- "'lfl'fl'rlfl?iflff?l I rlrlIrrllI-r I If! JII-JI- ?Ilfl'lJ?rJII'rJIl-IIrl r: Ir I'll 'llJ'llJ'llL: I?ll-Ill" :Jlll-I-ldl- I--.-- II lu-IJ i. ii: l-d'a "Illfd'lfl rJ- rl lJ-mJIEII-IIJIIJ r. lJ- 1 JIllrJIrJIll lEIrll JIWPI rl JII r.J lJm-I rJIrJIrl JII I I 5 I IH?-?rull ?aw- .- II -.IIJIEIJI rEr :lI -JJI-JI---IIJI rrIIsr I I- rI-rJIl IJI JII IIJ II- JIJI :flff'f? I II iI_r-Ir?I-II II-I-II-JII--J lr'h-EII-I- -EJJI - I--JI I I- JII-I-JEIJ rJ-Jrl - I-JI'hI.III-IEIJIJJIIIJ-IJJIJI Irl'ln'nld II-II-I- I I-II-- I-I JI-JJIJ-JJ--JI JIJ-rJ-llJ-I-wrll UrIIaf . IIll -JIEJI .- JIJII-IJIJIIJI --JI.1IJIIJIIJJIIFII-Ir-I-J-rrI-I-rJrr- r-Co-astalGen Inc Estlmatura..Appraisers'of &.Canstruc?om inar Gen Equipment! 2425 Sada Canynn Rd Hume fo 94553 Wa Project Planners. Napa Ca 797-237.3433 JCIB .SHEET ND. ca 5; EALGULATED HY GHEGHEEI B'r .Ej?mLuI DATE . IL ZQ/iz {dim April 21, 2017 OROVILLE DAM EMERGENCY CONTAINMENT AND GATED BROKEN SPILLWAY ALTERNATE REPAIR CONSTRUCTION DESIGN CONCEPT FOR DWR Attention: David Capra Director Our firm appraises power generation assets, construction machinery and large civil construction plans and projects. We have studied CA. DEPT. of WATER RESOURCES plans to repair the OROVILLE and are very critical of the design. Even though the plans are not complete in our opinion the whole plan concept is poor and has safety issues which we have addressedby the construction of AN ALTERNATE REPAIR DESIGN CONCEPT including the construction of a NEW SPILLWM CH UTE with a degree of detail complete with measures of unit volumes to determine if this structure could be completely repaired and improved by the Dec. deadline if approved by DWR using our design. Our criticism of the DWR plan is based on'three issues: 1) The DWR plan does not allow the contractor to start work to repair the controlled spillway on May 1 because DWR wants to use the spiliway as is in May and possibly June to control the height of the water level behind the dam so it does not overtop the EMERGENCY is not controlled or contained. Scheduled start constrains he contractor. 2) The BWR plan does not address the issue of containment of the EMERGENCY SPILLWAY this year even though the plans only allow release of 100.000 cu ft. per second through the partially repaired controlled spillway by Dec.1 2017. The plans allow the contractor to complete all repairs next year after the rainy season. in our opinion this is dangerous as the Hyatt Power Plant can only discharge approx? 10,000 at this present time and a repeat of this year? 5 weather next season could overtop the EMERGENCY SPILLWAY cause further damage to the emergency spillway and Thermolito Tail Race channel. Our quantity take off shows this project can be complete in 200 days if contractor works 7 it 24 hours per day. 3) The DWR plan forces the contractor to vibrate RCC under a 200 ft. overhanging broken concrete chute and overhanging rock outcrops. Whether or not the contractor can complete this 200 ft. deep ?ll with RCC which will not result in differential settlement which allows the repaired controlled spillway to fail in time is an additional safety issue. Our design would not ?ll the erosion canyon until next summer if required. Our design address these issues completely this year by building a new EMERGENCY SPILLWAY large enough to contain 250,000 plus another 250,000 from the broken controlled spillway meters west of the existing broken spillway without interfering with discharge from the gated control spillway so it can be used until Sept. 1 201?. see attached concept drawings. Thanks. Kenneth Viney Engineering Manager - OFFICE 707-237-3433 CEL 70??342?0335 20170424-5040 FERC PDF (Unofficial) 4/21/2017 6:55:16 PM Document Content(s) FERC OROVILLE DAM EMERGENCY AND GATED SPILLWAY CONCEPT 2.PDF..........1-1 FERC OROVILLE DAM EMERGENCY.PDF.......................................2-2