5. Estimate Prepared by: The CWEs were prepared by the Alaska District Cost Engineering Branch in accordance with ER

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1 Basis of Cost Estimate: 1. The purpose of this cost estimate basis is to document methods and reference materials used; and to describe how rates, prices and costs were developed to produce the Feasibility Study Alternatives Estimates (CWE). 2. Project Title: Kenai Bluffs Bank Stabilization, Alaska 3. Brief Description of Project: The purpose of this study is to identify a design to stabilize the bluff along a one-mile reach of riverbank at the mouth of the Kenai River that is subject to wave attack during storms. The proposed project location is just upstream of the mouth of the Kenai River where it meets Cook Inlet. The site is characterized by a steep eroding bluff approximately 70 feet high on the north side and a low lying wetland and tide flat on the south side. 4. Documents Referenced for Scope of Work: Alternatives Drawings, Technical Specifications, and the Feasibility Report. Quantities and dimensions were verified with the project designers. Project conditions and construction costing were based upon the alternatives presented in APPENDIX A, HYDRAULIC DESIGN. Lands and Damages costs, and quantities for Relocations were provided by the Real Estate branch. PED, SIOH and the Cultural Resources costs were provided by the PM/PF. 5. Estimate Prepared by: The CWEs were prepared by the Alaska District Cost Engineering Branch in accordance with ER Cost References: The following is a list of the various cost resources used to develop the Alternatives construction cost estimates: Historical Data A-E estimates CEDEP Vendor Quotes Estimators Judgment 7. Pricing for this estimate was developed through application of the markups below. Direct M/U: Productivity 100% Work Shift 6-12 s Sales Tax 0% Payroll Tax AK WCI Class Excavation LS&H 100% Contractor M/U: JOOH 65% HOOH 7% Profit 8.87% Bond 0.71% Owner M/U:

2 **** TOTAL PROJECT COST SUMMARY **** Printed:5/10/2017 Page 1 of 3 PROJECT: Kenai River Bluff Stabilization ALT#2 CWE - Revised DISTRICT: Alaska District PREPARED: 4/27/2017 PROJECT NO: P POC: CHIEF, COST ENGINEERING, Karl Harvey LOCATION: Kenai, AK This Estimate reflects the scope and schedule in report; Kenai River Bluff Stabilization Sec 116 Study May 2017 Civil Works Work Breakdown Structure ESTIMATED COST PROJECT FIRST COST (Constant Dollar Basis) TOTAL PROJECT COST (FULLY FUNDED) Program Year (Budget EC): 2018 Effective Price Level Date: 1 OCT 17 Spent Thru: TOTAL WBS Civil Works COST CNTG CNTG TOTAL ESC COST CNTG TOTAL 1-Oct-16 FIRST COST INFLATED COST CNTG FULL NUMBER Feature & Sub-Feature Description ($K) ($K) (%) ($K) (%) ($K) ($K) ($K) ($K) ($K) (%) ($K) ($K) ($K) A B C D E F G H I J K L M N O 02 RELOCATIONS $0 $0 - $0 - $0 $0 $0 $0 $0 - $0 $0 $0 09 CHANNELS & CANALS $1,101 $ % $1, % $1,121 $224 $1,345 $0 $1, % $1,143 $229 $1, CHANNELS & CANALS $336,519 $67, % $403, % $342,737 $68,547 $411,284 $0 $411, % $358,109 $71,622 $429,731 #N/A $0 $0 - $0 - $0 $0 $0 $0 $0 - $0 $0 $0 #N/A $0 $0 - $0 - $0 $0 $0 $0 $0 - $0 $0 $0 #N/A $0 $0 - $0 - $0 $0 $0 $0 $0 - $0 $0 $0 #N/A $0 $0 - $0 - $0 $0 $0 $0 $0 - $0 $0 $0 #N/A $0 $0 - $0 - $0 $0 $0 $0 $0 - $0 $0 $0 CONSTRUCTION ESTIMATE TOTALS: $337,619 $67,524 $405, % $343,858 $68,772 $412,630 $0 $412, % $359,252 $71,850 $431, LANDS AND DAMAGES $1,355 $ % $1, % $1,380 $276 $1,656 $0 $1, % $1,392 $278 $1, PLANNING, ENGINEERING & DESIGN $10,000 $2, % $12, % $10,361 $2,072 $12,433 $0 $12, % $10,537 $2,107 $12, CONSTRUCTION MANAGEMENT $5,000 $1, % $6, % $5,180 $1,036 $6,216 $0 $6, % $5,486 $1,097 $6,584 PROJECT COST TOTALS: $353,974 $70, % $424,769 $360,779 $72,156 $432,934 $0 $432, % $376,668 $75,334 $452,001 CHIEF, COST ENGINEERING, Karl Harvey PROJECT MANAGER, Ronnie Barcak ESTIMATED TOTAL PROJECT COST: $452,001 CHIEF, REAL ESTATE, Michael Coy CHIEF, PLANNING, Cindy Upah CHIEF, ENGINEERING SERVICES, Doug Bliss CHIEF, OPERATIONS, Julie Anderson CHIEF, CONSTRUCTION, Jim Jeffords CHIEF, CONTRACTING, Chris Tew CHIEF, RM, Karen Farmer CHIEF, DPM-CW, Bruce Sexauer Filename: Kenai River Bluffs Alt#2 TPCS May 2017 r1.xlsx TPCS

3 **** TOTAL PROJECT COST SUMMARY **** Printed:5/10/2017 Page 2 of 3 **** CONTRACT COST SUMMARY **** PROJECT: Kenai River Bluff Stabilization ALT#2 CWE - Revised DISTRICT: Alaska District PREPARED: 4/27/2017 LOCATION: Kenai, AK POC: CHIEF, COST ENGINEERING, Karl Harvey This Estimate reflects the scope and schedule in report; Kenai River Bluff Stabilization Sec 116 Study May 2017 Civil Works Work Breakdown Structure ESTIMATED COST PROJECT FIRST COST (Constant Dollar Basis) TOTAL PROJECT COST (FULLY FUNDED) Estimate Prepared: Effective Price Level: 10-Apr-17 Program Year (Budget EC): Oct-16 Effective Price Level Date: 1 OCT 17 RISK BASED WBS Civil Works COST CNTG CNTG TOTAL ESC COST CNTG TOTAL Mid-Point INFLATED COST CNTG FULL NUMBER Feature & Sub-Feature Description ($K) ($K) (%) ($K) (%) ($K) ($K) ($K) Date (%) ($K) ($K) ($K) A B C D E F G H I J P L M N O FEDERAL SHARED COSTS 02 RELOCATIONS $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 09 CHANNELS & CANALS $1,101 $ % $1, % $1,121 $224 $1, Q1 1.9% $1,143 $229 $1, CHANNELS & CANALS $336,519 $67, % $403, % $342,737 $68,547 $411, Q2 4.5% $358,109 $71,622 $429,731 CONSTRUCTION ESTIMATE TOTALS: $337,619 $67, % $405,143 $343,858 $68,772 $412,630 $359,252 $71,850 $431, LANDS AND DAMAGES $1,355 $ % $1, % $1,380 $276 $1, Q3 0.9% $1,392 $278 $1, PLANNING, ENGINEERING & DESIGN 0.3% Project Management $1,054 $ % $1, % $1,092 $218 $1, Q2 0.9% $1,102 $220 $1, % Planning & Environmental Compliance $675 $ % $ % $699 $140 $ Q2 0.9% $706 $141 $ % Engineering & Design $2,026 $ % $2, % $2,099 $420 $2, Q2 0.9% $2,119 $424 $2, % Reviews, ATRs, IEPRs, VE $675 $ % $ % $699 $140 $ Q2 0.9% $706 $141 $ % Life Cycle Updates (cost, schedule, risks) $1,013 $ % $1, % $1,050 $210 $1, Q2 0.9% $1,059 $212 $1, % Contracting & Reprographics $1,350 $ % $1, % $1,399 $280 $1, Q2 0.9% $1,412 $282 $1, % Engineering During Construction $675 $ % $ % $699 $140 $ Q3 5.9% $741 $148 $ % Planning During Construction $844 $ % $1, % $874 $175 $1, Q3 5.9% $926 $185 $1, % Project Operations $1,688 $ % $2, % $1,749 $350 $2, Q2 0.9% $1,765 $353 $2, CONSTRUCTION MANAGEMENT 0.2% Construction Management $675 $ % $ % $699 $140 $ Q3 5.9% $741 $148 $ % Project Operation: $2,195 $ % $2, % $2,274 $455 $2, Q3 5.9% $2,408 $482 $2, % Project Management $2,130 $ % $2, % $2,207 $441 $2, Q3 5.9% $2,337 $467 $2,805 CONTRACT COST TOTALS: $353,974 $70,795 $424,769 $360,779 $72,156 $432,934 $376,668 $75,334 $452,001 Filename: Kenai River Bluffs Alt#2 TPCS May 2017 r1.xlsx TPCS

4 **** TOTAL PROJECT COST SUMMARY **** Printed:5/10/2017 Page 3 of 3 **** CONTRACT COST SUMMARY **** PROJECT: Kenai River Bluff Stabilization ALT#2 CWE - Revised DISTRICT: Alaska District PREPARED: 4/27/2017 LOCATION: Kenai, AK POC: CHIEF, COST ENGINEERING, Karl Harvey This Estimate reflects the scope and schedule in report; Kenai River Bluff Stabilization Sec 116 Study May 2017 Civil Works Work Breakdown Structure ESTIMATED COST PROJECT FIRST COST (Constant Dollar Basis) TOTAL PROJECT COST (FULLY FUNDED) Estimate Prepared: Effective Price Level: 10-Apr-17 Program Year (Budget EC): Oct-16 Effective Price Level Date: 1 OCT 17 WBS Civil Works COST CNTG CNTG TOTAL ESC COST CNTG TOTAL Mid-Point INFLATED COST CNTG FULL NUMBER Feature & Sub-Feature Description ($K) ($K) (%) ($K) (%) ($K) ($K) ($K) Date (%) ($K) ($K) ($K) A B C D E F G H I J P L M N O LOCAL SERVICE FACILITITES 02 RELOCATIONS $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 09 CHANNELS & CANALS $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 09 CHANNELS & CANALS $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 CONSTRUCTION ESTIMATE TOTALS: $0 $0 0.0% $0 $0 $0 $0 $0 $0 $0 01 LANDS AND DAMAGES $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 30 PLANNING, ENGINEERING & DESIGN 0.3% Project Management $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.2% Planning & Environmental Compliance $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.6% Engineering & Design $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.2% Reviews, ATRs, IEPRs, VE $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.3% Life Cycle Updates (cost, schedule, risks) $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.4% Contracting & Reprographics $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.2% Engineering During Construction $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.3% Planning During Construction $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.5% Project Operations $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 31 CONSTRUCTION MANAGEMENT 0.2% Construction Management $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.7% Project Operation: $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.6% Project Management $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 CONTRACT COST TOTALS: $0 $0 $0 $0 $0 $0 $0 $0 $0 Filename: Kenai River Bluffs Alt#2 TPCS May 2017 r1.xlsx TPCS

5 Contingency 20% SIOH 8% Escalation 5.15% 8. Factors impacting the estimate: The earthwork project includes materials, labor, and heavy equipment costs. Long transport distances for materials and mobilization translate to increased labor time and fuel costs. Fuel price is volatile in Alaska. Weather is a direct impact on working in the marine coastal environment with landbased and floating equipment. There are environmental windows to complete the work, and marine vessel traffic in Kenai River is busy in summer fishing season. This work has moderate to above average risk. 9. Major Assumptions: The Contractor will furnish all labor, equipment, supplies and materials to accomplish the work. There is no local material source and little competition for quarry materials. The earthwork is well understood, but access to the bluff toe is difficult with unstable slopes, tides, winds and eroding banks. To deliver materials and equipment to the slope toe, temporary pads will be needed at the river bank. A combination of land-based and floating marine equipment is needed. Construction mid-point is assumed to be Dec Off-season work may be required, but revetment construction in freezing weather is not satisfactory. A Cost and Schedule Risk Analysis will be required for the TSP and cost certification. Al Arruda, CCC. Date Karl J. Harvey, PE, CCE. Date Senior Cost Engineer Chief, Cost Engineering Branch

6 Print Date Wed 10 May 2017 U.S. Army Corps of Engineers Time 16:43:32 Eff. Date 4/15/2017 Project : Kenai River Mouth Relocation Alt#2 (4) CWE - River Mouth Relocation (Jetties) COE Standard Report Selections Title Page Kenai River Mouth Relocation Alt#2 (4) CWE - River Mouth Relocation (Jetties) The Secretary of the Army was directed in the Energy and Water Development Appropriations Act of 2002, Senate Report , to expend up to $500,000 to conduct a "special technical evaluation of bank stabilization needs along the lower Kenai River." Kenai is located on the western coast of the Kenai Peninsula, fronting Cook Inlet. It is approximately 65 air miles and 155 highway miles southwest of Anchorage. Problem Definition: For many years the City of Kenai has been concerned with the ongoing erosion of a one-mile portion of the steep bluff along the north bank of the Kenai River, just upstream of the river mouth. Over the past few decades the bluff has been significantly receding, requiring the relocation of privately owned buildings, as well as city infrastructure and utilities. Unless measures to control the erosion and protect the bluff are implemented, bluff erosion is expected to continue, further threatening existing buildings, infrastructure, and utilities within the city in proximity to the bluff. The top of the bluff intersects approximately 46 parcels in the project area. According to the Kenai Peninsula Borough s GIS maps, several parcels that appear to have previously been located at the top of the bluff are now along the bluff toe or in the water due to bluff recession. As such, all alternatives will involve temporary construction easements or permanent acquisition of some properties to accommodate the work and/or cut back slope. The project design life to be used in calculations of economic costs and benefits, as well as material specifications, is 50 years. Estimated maintenance costs for the duration of the project life will be amortized and compared as a present value. The cost of any material expected to need replacement within the project life will be added to the project costs. Climate data are compiled by the Western Regional Climate Center (WRCC). Extreme temperatures have ranged from -47ºF to 93ºF. Temperatures typically stay above freezing for approximately 100 days during the summer season. The area receives approximately 19 inches of precipitation annually. The mean annual total snowfall is approximately 61 inches, with an average of approximately 12 inches of snow depth during winter months. Tide elevations at Kenai typically fluctuate with a range of approximately twenty vertical feet, reaching the toe of the bluff at high tide. River ice is prominent in the Kenai River during winter months. Both sea ice and river ice collect at the toe of the bluff. The project shall withstand forces from river ice and sea ice. The design alternatives shall minimize adverse environmental impacts. Estimated by Designed by Prepared by Tetra Tech/POA-EC-CE Tetra Tech Al Arruda Preparation Date 5/10/2017 Effective Date of Pricing 4/15/2017 Estimated Construction Time 730 Days This report is not copyrighted, but the information contained herein is For Official Use Only.

7 Print Date Wed 10 May 2017 U.S. Army Corps of Engineers Time 16:43:32 Eff. Date 4/15/2017 Project : Kenai River Mouth Relocation Alt#2 (4) CWE - River Mouth Relocation (Jetties) COE Standard Report Selections Project Cost Summary Report Page 1 Description Quantity UOM ContractCost Contingency MiscOwner Escalation ProjectCost Project Cost Summary Report 353,974,345 70,794, ,769,214 1,354, ,625, LANDS AND DAMAGES 1.00 EA 1,354, , ,625,826 1,042, ,250, AQUISITIONS 1.00 EA 1,042, , ,250, , , ADMINISTRATION 1.00 EA 312,500 62, , MOBILIZATION & DEMOBILIZATION 1.00 LS 1,100, , ,321,076 Mobilization 1.00 LS 550, , ,538 Demobilization 1.00 LS 550, , , CHANNELS AND CANALS 1.00 LS 336,518,593 67,303, ,822, ,518, ,822, River Channel Relocation 1.00 EA 336,518,593 67,303, ,822, Excavate New Nav Channel 3,912, BCY 34,397,931 6,879, ,277, Excavate Dry 3,842, BCY 29,795,200 5,959, ,754, Excavate Wet 70, BCY 647, , , Dredging 136, CY 3,917, , ,700,678 38, , Hydrographic Survey 1.00 EA 38,278 7, , Jetties 1,163, ECY 302,120,662 60,424, ,544, Armor 10.5 Ton 281, CY 12,881,872 2,576, ,458, Construct Jetty New A Rock 295, ECY 12,635,444 2,527, ,162, Environmental Observers 3, HR 246,428 49, ,714

8 Print Date Wed 10 May 2017 U.S. Army Corps of Engineers Time 16:43:32 Eff. Date 4/15/2017 Project : Kenai River Mouth Relocation Alt#2 (4) CWE - River Mouth Relocation (Jetties) COE Standard Report Selections Project Cost Summary Report Page 2 Description Quantity UOM ContractCost Contingency MiscOwner Escalation ProjectCost Armor 5 Ton 189, CY 11,187,337 2,237, ,424, Construct Breakwater repairs with new quarry run rock , CY 10,952,779 2,190, ,143, Environmental Observers 2, HR 234,558 46, , B Rock 1 Ton 117, CY 5,417,728 1,083, ,501, Construct Breakwater repairs with new quarry run rock , CY 5,324,916 1,064, ,389, Environmental Observers 1, HR 92,812 18, , B Rock 0.5 Ton 58, CY 3,134, , ,761, Construct Breakwater repairs with new quarry run rock , CY 3,088, , ,706, Environmental Observers HR 45,931 9, , C Rock 100 LB 204, CY 8,522,227 1,704, ,226, Construct Breakwater repairs with new quarry run rock , CY 8,368,105 1,673, ,041, Environmental Observers 1, HR 154,122 30, , C Rock 40 LB 85, CY 4,085, , ,902, Construct Breakwater repairs with new quarry run rock , CY 4,021, , ,825,423

9 Print Date Wed 10 May 2017 U.S. Army Corps of Engineers Time 16:43:32 Eff. Date 4/15/2017 Project : Kenai River Mouth Relocation Alt#2 (4) CWE - River Mouth Relocation (Jetties) COE Standard Report Selections Project Cost Summary Report Page 3 Description Quantity UOM ContractCost Contingency MiscOwner Escalation ProjectCost Environmental Observers HR 64,501 12, , Gravel 95, CY 14,324,514 2,864, ,189, Construct Breakwater repairs with new quarry run rock , CY 5,841,604 1,168, ,009,925 5, , Environmental Observers 1, HR 8,482,909 1,696, ,179, Construct Breakwater repairs with new quarry run rock , CY 8,368,105 1,673, ,041, Quarry Rock Fee 2,095, TON 209,085,007 41,817, ,902,008 47, , Transport between quarry and placement site EA 33,481,897 6,696, ,178,276 Crew for Transport between quarry and placement site , , HR 33,481,897 6,696, ,178, Equipment Standby HR 102,748 20, ,297 10,000, ,000, PED 1.00 EA 10,000,000 2,000, ,000,000 5,000, ,000, SIOH 1.00 EA 5,000,000 1,000, ,000,000

10 Print Date Wed 10 May 2017 U.S. Army Corps of Engineers Time 16:43:32 Eff. Date 4/15/2017 Project : Kenai River Mouth Relocation Alt#2 (4) CWE - River Mouth Relocation (Jetties) COE Standard Report Selections Table of Contents Description Page Project Cost Summary Report 1 01 LANDS AND DAMAGES 1 AQUISITIONS 1 ADMINISTRATION 1 09 MOBILIZATION & DEMOBILIZATION 1 Mobilization 1 Demobilization 1 09 CHANNELS AND CANALS 1 River Channel Relocation 1 Excavate New Nav Channel 1 Excavate Dry 1 Excavate Wet 1 Dredging 1 13 Hydrographic Survey 1 Jetties 1 Armor 10.5 Ton 1 Construct Jetty New A Rock 1 Environmental Observers 1 Armor 5 Ton Construct Breakwater repairs with new quarry run rock 2 Environmental Observers 2 B Rock 1 Ton Construct Breakwater repairs with new quarry run rock 2 Environmental Observers 2 B Rock 0.5 Ton Construct Breakwater repairs with new quarry run rock 2 Environmental Observers 2 C Rock 100 LB Construct Breakwater repairs with new quarry run rock 2 Environmental Observers 2 C Rock 40 LB Construct Breakwater repairs with new quarry run rock 2 Environmental Observers 3 Gravel Construct Breakwater repairs with new quarry run rock 3 Environmental Observers Construct Breakwater repairs with new quarry run rock 3 Quarry Rock Fee 3 Transport between quarry and placement site 3 Crew for Transport between quarry and placement site 3 Equipment Standby 3

11 Print Date Wed 10 May 2017 U.S. Army Corps of Engineers Time 16:43:32 Eff. Date 4/15/2017 Project : Kenai River Mouth Relocation Alt#2 (4) CWE - River Mouth Relocation (Jetties) COE Standard Report Selections Table of Contents Description Page 30 PED 3 31 SIOH 3

12 **** TOTAL PROJECT COST SUMMARY **** Printed:5/10/2017 Page 1 of 3 PROJECT: Kenai River Bluff Stabilization ALT#3 CWE - Revised DISTRICT: Alaska District PREPARED: 4/27/2017 PROJECT NO:P POC: CHIEF, COST ENGINEERING, Karl Harvey LOCATION: Kenai, AK This Estimate reflects the scope and schedule in report; Kenai River Bluff Stabilization Sec 116 Study May 2017 Civil Works Work Breakdown Structure ESTIMATED COST PROJECT FIRST COST (Constant Dollar Basis) TOTAL PROJECT COST (FULLY FUNDED) Program Year (Budget EC): 2018 Effective Price Level Date: 1 OCT 17 TOTAL Spent Thru: FIRST WBS Civil Works COST CNTG CNTG TOTAL ESC COST CNTG TOTAL 1-Oct-16 COST INFLATED COST CNTG FULL NUMBER Feature & Sub-Feature Description ($K) ($K) (%) ($K) (%) ($K) ($K) ($K) ($K) ($K) (%) ($K) ($K) ($K) A B C D E F G H I J K L M N O 02 RELOCATIONS $363 $ % $ % $369 $74 $443 $0 $ % $386 $77 $ BANK STABILIZATION $1,765 $ % $2, % $1,798 $360 $2,157 $0 $2, % $1,878 $376 $2, BANK STABILIZATION $25,563 $5, % $30, % $26,035 $5,207 $31,242 $0 $31, % $27,203 $5,441 $32, CULTURAL RESOURCE PRESERVATION $2,908 $ % $3, % $2,962 $592 $3,554 $0 $3, % $3,095 $619 $3,714 #N/A $0 $0 - $0 - $0 $0 $0 $0 $0 - $0 $0 $0 #N/A $0 $0 - $0 - $0 $0 $0 $0 $0 - $0 $0 $0 #N/A $0 $0 - $0 - $0 $0 $0 $0 $0 - $0 $0 $0 #N/A $0 $0 - $0 - $0 $0 $0 $0 $0 - $0 $0 $0 CONSTRUCTION ESTIMATE TOTALS: $30,598 $6,120 $36, % $31,164 $6,233 $37,397 $0 $37, % $32,562 $6,512 $39, LANDS AND DAMAGES $6,259 $1, % $7, % $6,375 $1,275 $7,650 $0 $7, % $6,433 $1,287 $7, PLANNING, ENGINEERING & DESIGN $4,000 $ % $4, % $4,144 $829 $4,973 $0 $4, % $4,246 $849 $5, CONSTRUCTION MANAGEMENT $2,000 $ % $2, % $2,072 $414 $2,487 $0 $2, % $2,258 $452 $2,710 PROJECT COST TOTALS: $42,858 $8, % $51,429 $43,755 $8,751 $52,506 $0 $52, % $45,498 $9,100 $54,598 CHIEF, COST ENGINEERING, Karl Harvey PROJECT MANAGER, Ronnie Barcak ESTIMATED TOTAL PROJECT COST: $54,598 CHIEF, REAL ESTATE, Michael Coy CHIEF, PLANNING, Cindy Upah CHIEF, ENGINEERING SERVICES, Doug Bliss CHIEF, OPERATIONS, Julie Anderson CHIEF, CONSTRUCTION, Jim Jeffords CHIEF, CONTRACTING, Chris Tew CHIEF, RM, Karen Farmer Filename: Kenai River Bluffs Alt#3 TPCS May 2017 r1.xlsx TPCS CHIEF, DPM-CW, Bruce Sexauer

13 **** TOTAL PROJECT COST SUMMARY **** Printed:5/10/2017 Page 2 of 3 **** CONTRACT COST SUMMARY **** PROJECT: Kenai River Bluff Stabilization ALT#3 CWE - Revised DISTRICT: Alaska District PREPARED: 4/27/2017 LOCATION: Kenai, AK POC: CHIEF, COST ENGINEERING, Karl Harvey This Estimate reflects the scope and schedule in report; Kenai River Bluff Stabilization Sec 116 Study May 2017 Civil Works Work Breakdown Structure ESTIMATED COST PROJECT FIRST COST (Constant Dollar Basis) TOTAL PROJECT COST (FULLY FUNDED) Estimate Prepared: Effective Price Level: 10-Apr-17 Program Year (Budget EC): Oct-16 Effective Price Level Date: 1 OCT 17 RISK BASED WBS Civil Works COST CNTG CNTG TOTAL ESC COST CNTG TOTAL Mid-Point INFLATED COST CNTG FULL NUMBER Feature & Sub-Feature Description ($K) ($K) (%) ($K) (%) ($K) ($K) ($K) Date (%) ($K) ($K) ($K) A B C D E F G H I J P L M N O FEDERAL SHARED COSTS 02 RELOCATIONS $363 $ % $ % $369 $74 $ Q2 4.5% $386 $77 $ BANK STABILIZATION $1,765 $ % $2, % $1,798 $360 $2, Q2 4.5% $1,878 $376 $2, BANK STABILIZATION $25,563 $5, % $30, % $26,035 $5,207 $31, Q2 4.5% $27,203 $5,441 $32, CULTURAL RESOURCE PRESERVATION $2,908 $ % $3, % $2,962 $592 $3, Q2 4.5% $3,095 $619 $3,714 CONSTRUCTION ESTIMATE TOTALS: $30,598 $6, % $36,718 $31,164 $6,233 $37,397 $32,562 $6,512 $39, LANDS AND DAMAGES $6,259 $1, % $7, % $6,375 $1,275 $7, Q3 0.9% $6,433 $1,287 $7, PLANNING, ENGINEERING & DESIGN 2.3% Project Management $696 $ % $ % $721 $144 $ Q2 0.9% $728 $146 $ % Planning & Environmental Compliance $259 $ % $ % $268 $54 $ Q2 0.9% $271 $54 $ % Engineering & Design $1,530 $ % $1, % $1,585 $317 $1, Q2 0.9% $1,600 $320 $1, % Reviews, ATRs, IEPRs, VE $153 $ % $ % $159 $32 $ Q2 0.9% $160 $32 $ % Life Cycle Updates (cost, schedule, risks) $153 $ % $ % $159 $32 $ Q2 0.9% $160 $32 $ % Contracting & Reprographics $153 $ % $ % $159 $32 $ Q2 0.9% $160 $32 $ % Engineering During Construction $153 $ % $ % $159 $32 $ Q2 9.0% $173 $35 $ % Planning During Construction $597 $ % $ % $619 $124 $ Q2 9.0% $674 $135 $ % Project Operations $306 $ % $ % $317 $63 $ Q2 0.9% $320 $64 $ CONSTRUCTION MANAGEMENT 2.5% Construction Management $752 $ % $ % $779 $156 $ Q2 9.0% $849 $170 $1, % Project Operation: $800 $ % $ % $829 $166 $ Q2 9.0% $903 $181 $1, % Project Management $448 $ % $ % $464 $93 $ Q2 9.0% $506 $101 $607 CONTRACT COST TOTALS: $42,858 $8,572 $51,429 $43,755 $8,751 $52,506 $45,498 $9,100 $54,598 Filename: Kenai River Bluffs Alt#3 TPCS May 2017 r1.xlsx TPCS

14 **** TOTAL PROJECT COST SUMMARY **** Printed:5/10/2017 Page 3 of 3 **** CONTRACT COST SUMMARY **** PROJECT: Kenai River Bluff Stabilization ALT#3 CWE - Revised DISTRICT: Alaska District PREPARED: 4/27/2017 LOCATION: Kenai, AK POC: CHIEF, COST ENGINEERING, Karl Harvey This Estimate reflects the scope and schedule in report; Kenai River Bluff Stabilization Sec 116 Study May 2017 Civil Works Work Breakdown Structure ESTIMATED COST PROJECT FIRST COST (Constant Dollar Basis) TOTAL PROJECT COST (FULLY FUNDED) Estimate Prepared: Effective Price Level: 10-Apr-17 Program Year (Budget EC): Oct-16 Effective Price Level Date: 1 OCT 17 WBS Civil Works COST CNTG CNTG TOTAL ESC COST CNTG TOTAL Mid-Point INFLATED COST CNTG FULL NUMBER Feature & Sub-Feature Description ($K) ($K) (%) ($K) (%) ($K) ($K) ($K) Date (%) ($K) ($K) ($K) A B C D E F G H I J P L M N O LOCAL SERVICE FACILITIES 02 RELOCATIONS $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 16 BANK STABILIZATION $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 16 BANK STABILIZATION $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 18 CULTURAL RESOURCE PRESERVATION $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 CONSTRUCTION ESTIMATE TOTALS: $0 $0 0.0% $0 $0 $0 $0 $0 $0 $0 01 LANDS AND DAMAGES $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 30 PLANNING, ENGINEERING & DESIGN 2.3% Project Management $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.8% Planning & Environmental Compliance $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 5.0% Engineering & Design $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.5% Reviews, ATRs, IEPRs, VE $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.5% Life Cycle Updates (cost, schedule, risks) $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.5% Contracting & Reprographics $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.5% Engineering During Construction $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 2.0% Planning During Construction $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 1.0% Project Operations $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 31 CONSTRUCTION MANAGEMENT 2.5% Construction Management $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 2.6% Project Operation: $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 1.5% Project Management $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 CONTRACT COST TOTALS: $0 $0 $0 $0 $0 $0 $0 $0 $0 Filename: Kenai River Bluffs Alt#3 TPCS May 2017 r1.xlsx TPCS

15 Print Date Wed 10 May 2017 U.S. Army Corps of Engineers Time 16:59:27 Eff. Date 4/15/2017 Project : Kenai River Bluff Stabilization, Alt#3 (2) CWE - Revetting and Vegetating the Bluff Face - Buried Toe (Stone Buttress) - Revised - No Rec COE Standard Report Selections Title Page Kenai River Bluff Stabilization, Alt#3 (2) CWE - Revetting and Vegetating the Bluff Face - Buried Toe (Stone Buttress) - Revised - No Rec The Secretary of the Army was directed in the Energy and Water Development Appropriations Act of 2002, Senate Report , to expend up to $500,000 to conduct a "special technical evaluation of bank stabilization needs along the lower Kenai River." Kenai is located on the western coast of the Kenai Peninsula, fronting Cook Inlet. It is approximately 65 air miles and 155 highway miles southwest of Anchorage. "Kenai River Bluff Erosion, Bluff Stabilization Design Alternatives, Design Alternatives Report", U.S. Army Corps of Engineers, Alaska District, June 2011, prepared by Tetra Tech provides the design of bluff stabilization along with detailed engineering drawings for the preliminary design. "Kenai River Bluff Stabilization, Kenai, Alaska, Cost Engineering Report Draft Submittal", U.S. Army Corps of Engineers, Alaska District, June 2011 contains detailed cost estimates of the construction features presented in the Design Alternatives Report dated June 2011; performed by Tetra Tech. Estimated by Designed by Prepared by Tetra Tech / POA-EC-CE Tetra Tech Al Arruda Preparation Date 5/9/2017 Effective Date of Pricing 4/15/2017 Estimated Construction Time 730 Days This report is not copyrighted, but the information contained herein is For Official Use Only.

16 Print Date Wed 10 May 2017 U.S. Army Corps of Engineers Time 16:59:27 Eff. Date 4/15/2017 Project : Kenai River Bluff Stabilization, Alt#3 (2) CWE - Revetting and Vegetating the Bluff Face - Buried Toe (Stone Buttress) - Revised - No Rec COE Standard Report Selections Project Cost Summary Report Page 1 Description Quantity UOM ContractCost Contingency MiscOwner Escalation ProjectCost Project Cost Summary Report 42,857,641 8,571, ,429,169 6,259, ,511, LANDS AND DAMAGES 1.00 EA 6,259,248 1,251, ,511,098 5,196, ,236, AQUISITIONS 1.00 EA 5,196,748 1,039, ,236,098 1,062, ,275, ADMINISTRATION 1.00 EA 1,062, , ,275, RELOCATIONS 1.00 LS 362,552 72, , Relocations 1.00 LS 362,552 72, , Pipe Demolition LF 21,948 4, , Pipe Demo Earthwork CY 12,633 2, , Pipe Demolition 1.00 LS 9,315 1, , Building and Pad Demolition 1.00 LS 295,859 59, , Overlook Demolition 1.00 LS 2, , Roadway Demolition 1.00 LS 41,816 8, , MOBILIZATION & DEMOBILIZATION 1.00 LS 1,765, , ,118,074 Mobilization 1.00 LS 882, , ,059,037 Demobilization 1.00 LS 882, , ,059, BANK STABILIZATION 1.00 LS 25,562,619 5,112, ,675, Bank Stabilization 1.00 LS 25,562,619 5,112, ,675, Site Preparation 1.00 LS 1,336, , ,603, Silt Fence 2, LF 18,158 3, , Temporary Road 5, LF 163,747 32, , Pumping 1.00 LS 701, , ,970

17 Print Date Wed 10 May 2017 U.S. Army Corps of Engineers Time 16:59:27 Eff. Date 4/15/2017 Project : Kenai River Bluff Stabilization, Alt#3 (2) CWE - Revetting and Vegetating the Bluff Face - Buried Toe (Stone Buttress) - Revised - No Rec COE Standard Report Selections Project Cost Summary Report Page 2 Description Quantity UOM ContractCost Contingency MiscOwner Escalation ProjectCost 28, , Clearing and Grubbing 6.80 ACR 194,276 38, , Fencing 5, LF 258,741 51, , Earthwork 1.00 LS 6,287,940 1,257, ,545, Alluvial Deposits 140, BCY 2,534, , ,041, Excavation 140, CY 1,140, , ,368, Backfill 144, CY 1,378, , ,654, Dispose of Unusable Material CY 15,350 3, , Glacial Till 67, BCY 2,280, , ,736, Excavation 67, CY 542, , , Backfill 15, CY 144,094 28, , Dispose of Unused Material 51, CY 1,594, , ,913, Borrow Material 8, BCY 629, , , Soil Stabilization 1.00 LS 843, , ,012, Erosion Protection 56, LCY 14,563,771 2,912, ,476, Land Based Placement 28, LCY 6,478,356 1,295, ,774, Water Based Placement 28, LCY 7,417,355 1,483, ,900, Rock Loading on Barge 28, LCY 433,453 86, ,143

18 Print Date Wed 10 May 2017 U.S. Army Corps of Engineers Time 16:59:27 Eff. Date 4/15/2017 Project : Kenai River Bluff Stabilization, Alt#3 (2) CWE - Revetting and Vegetating the Bluff Face - Buried Toe (Stone Buttress) - Revised - No Rec COE Standard Report Selections Project Cost Summary Report Page 3 Description Quantity UOM ContractCost Contingency MiscOwner Escalation ProjectCost Geotextile Fabric 34, SY 234,608 46, , Vegetation 1.00 LS 3,374, , ,049,213 2,908, ,489, CULTURAL RESOURCES PRESERVATION 1.00 EA 2,908, , ,489,792 1,040, ,248, HISTORICAL AMERICAN BUILDING SURVEY 1.00 EA 1,040, , ,248, , ,120, SALVAGE RECOVERY 2.00 EA 1,868, , ,241,792 2, , Archaeological Survey 8.00 DAY 20,480 4, ,576 32, , Excavation WK 384,000 76, ,800 16, , Artifact Analysis WK 480,000 96, ,000 16, , Faunal Analysis WK 480,000 96, ,000 16, , Data Recovery Report WK 480,000 96, ,000 8, , Accession to Repository 2.00 WK 16,000 3, ,200 1, , Present Data to Community 4.00 DAY 5,120 1, , Present Data to Professionals 4.00 DAY 2, , PED 1.00 LS 4,000, , ,800, SIOH 1.00 LS 2,000, , ,400,000

19 Print Date Wed 10 May 2017 U.S. Army Corps of Engineers Time 16:59:27 Eff. Date 4/15/2017 Project : Kenai River Bluff Stabilization, Alt#3 (2) CWE - Revetting and Vegetating the Bluff Face - Buried Toe (Stone Buttress) - Revised - No Rec COE Standard Report Selections Table of Contents Description Page Project Cost Summary Report 1 01 LANDS AND DAMAGES 1 AQUISITIONS 1 ADMINISTRATION 1 02 RELOCATIONS Relocations Pipe Demolition Pipe Demo Earthwork Pipe Demolition Building and Pad Demolition Overlook Demolition Roadway Demolition 1 16 MOBILIZATION & DEMOBILIZATION 1 Mobilization 1 Demobilization 1 16 BANK STABILIZATION Bank Stabilization Site Preparation Silt Fence Temporary Road Pumping Clearing and Grubbing Fencing Earthwork Alluvial Deposits Excavation Backfill Dispose of Unusable Material Glacial Till Excavation Backfill Dispose of Unused Material Borrow Material Soil Stabilization Erosion Protection Land Based Placement Water Based Placement Rock Loading on Barge Geotextile Fabric Vegetation 3 18 CULTURAL RESOURCES PRESERVATION 3

20 Print Date Wed 10 May 2017 U.S. Army Corps of Engineers Time 16:59:27 Eff. Date 4/15/2017 Project : Kenai River Bluff Stabilization, Alt#3 (2) CWE - Revetting and Vegetating the Bluff Face - Buried Toe (Stone Buttress) - Revised - No Rec COE Standard Report Selections Table of Contents Description Page HISTORICAL AMERICAN BUILDING SURVEY 3 SALVAGE RECOVERY 3 Archaeological Survey 3 Excavation 3 Artifact Analysis 3 Faunal Analysis 3 Data Recovery Report 3 Accession to Repository 3 Present Data to Community 3 Present Data to Professionals 3 30 PED 3 31 SIOH 3

21 **** TOTAL PROJECT COST SUMMARY **** Printed:5/10/2017 Page 1 of 3 PROJECT: Kenai River Bluff Stabilization ALT#4 CWE - Revised DISTRICT: Alaska District PREPARED: 4/27/2017 PROJECT NO:P POC: CHIEF, COST ENGINEERING, Karl Harvey LOCATION: Kenai, AK This Estimate reflects the scope and schedule in report; Kenai River Bluff Stabilization Sec 116 Study May 2017 Civil Works Work Breakdown Structure ESTIMATED COST PROJECT FIRST COST (Constant Dollar Basis) TOTAL PROJECT COST (FULLY FUNDED) Program Year (Budget EC): 2018 Effective Price Level Date: 1 OCT 17 TOTAL Spent Thru: FIRST WBS Civil Works COST CNTG CNTG TOTAL ESC COST CNTG TOTAL 1-Oct-16 COST INFLATED COST CNTG FULL NUMBER Feature & Sub-Feature Description ($K) ($K) (%) ($K) (%) ($K) ($K) ($K) ($K) ($K) (%) ($K) ($K) ($K) A B C D E F G H I J K L M N O 02 RELOCATIONS $357 $ % $ % $363 $73 $436 $0 $ % $379 $76 $ BANK STABILIZATION $1,716 $ % $2, % $1,748 $350 $2,098 $0 $2, % $1,826 $365 $2, BANK STABILIZATION $28,626 $5, % $34, % $29,155 $5,831 $34,986 $0 $34, % $30,463 $6,093 $36, CULTURAL RESOURCE PRESERVATION $2,908 $ % $3, % $2,962 $592 $3,554 $0 $3, % $3,095 $619 $3,714 #N/A $0 $0 - $0 - $0 $0 $0 $0 $0 - $0 $0 $0 #N/A $0 $0 - $0 - $0 $0 $0 $0 $0 - $0 $0 $0 #N/A $0 $0 - $0 - $0 $0 $0 $0 $0 - $0 $0 $0 #N/A $0 $0 - $0 - $0 $0 $0 $0 $0 - $0 $0 $0 CONSTRUCTION ESTIMATE TOTALS: $33,607 $6,721 $40, % $34,228 $6,846 $41,074 $0 $41, % $35,763 $7,153 $42, LANDS AND DAMAGES $6,259 $1, % $7, % $6,375 $1,275 $7,650 $0 $7, % $6,433 $1,287 $7, PLANNING, ENGINEERING & DESIGN $4,000 $ % $4, % $4,144 $829 $4,973 $0 $4, % $4,252 $850 $5, CONSTRUCTION MANAGEMENT $2,000 $ % $2, % $2,072 $414 $2,487 $0 $2, % $2,258 $452 $2,710 PROJECT COST TOTALS: $45,866 $9, % $55,040 $46,819 $9,364 $56,183 $0 $56, % $48,706 $9,741 $58,447 CHIEF, COST ENGINEERING, Karl Harvey PROJECT MANAGER, Ronnie Barcak ESTIMATED TOTAL PROJECT COST: $58,447 CHIEF, REAL ESTATE, Michael Coy CHIEF, PLANNING, Cindy Upah CHIEF, ENGINEERING SERVICES, Doug Bliss CHIEF, OPERATIONS, Julie Anderson CHIEF, CONSTRUCTION, Jim Jeffords CHIEF, CONTRACTING, Chris Tew CHIEF, RM, Karen Farmer Filename: Kenai River Bluffs Alt#4 TPCS May 2017 r1.xlsx TPCS CHIEF, DPM-CW, Bruce Sexauer

22 **** TOTAL PROJECT COST SUMMARY **** Printed:5/10/2017 Page 2 of 3 **** CONTRACT COST SUMMARY **** PROJECT: Kenai River Bluff Stabilization ALT#4 CWE - Revised DISTRICT: Alaska District PREPARED: 4/27/2017 LOCATION: Kenai, AK POC: CHIEF, COST ENGINEERING, Karl Harvey This Estimate reflects the scope and schedule in report; Kenai River Bluff Stabilization Sec 116 Study May 2017 Civil Works Work Breakdown Structure ESTIMATED COST PROJECT FIRST COST (Constant Dollar Basis) TOTAL PROJECT COST (FULLY FUNDED) Estimate Prepared: Effective Price Level: 10-Apr-17 Program Year (Budget EC): Oct-16 Effective Price Level Date: 1 OCT 17 RISK BASED WBS Civil Works COST CNTG CNTG TOTAL ESC COST CNTG TOTAL Mid-Point INFLATED COST CNTG FULL NUMBER Feature & Sub-Feature Description ($K) ($K) (%) ($K) (%) ($K) ($K) ($K) Date (%) ($K) ($K) ($K) A B C D E F G H I J P L M N O FEDERAL SHARED COSTS 02 RELOCATIONS $357 $ % $ % $363 $73 $ Q2 4.5% $379 $76 $ BANK STABILIZATION $1,716 $ % $2, % $1,748 $350 $2, Q2 4.5% $1,826 $365 $2, BANK STABILIZATION $28,626 $5, % $34, % $29,155 $5,831 $34, Q2 4.5% $30,463 $6,093 $36, CULTURAL RESOURCE PRESERVATION $2,908 $ % $3, % $2,962 $592 $3, Q2 4.5% $3,095 $619 $3,714 CONSTRUCTION ESTIMATE TOTALS: $33,607 $6, % $40,328 $34,228 $6,846 $41,074 $35,763 $7,153 $42, LANDS AND DAMAGES $6,259 $1, % $7, % $6,375 $1,275 $7, Q3 0.9% $6,433 $1,287 $7, PLANNING, ENGINEERING & DESIGN 2.2% Project Management $742 $ % $ % $769 $154 $ Q2 0.9% $776 $155 $ % Planning & Environmental Compliance $284 $ % $ % $294 $59 $ Q2 0.9% $297 $59 $ % Engineering & Design $1,311 $ % $1, % $1,358 $272 $1, Q2 0.9% $1,371 $274 $1, % Reviews, ATRs, IEPRs, VE $168 $ % $ % $174 $35 $ Q2 0.9% $176 $35 $ % Life Cycle Updates (cost, schedule, risks) $168 $ % $ % $174 $35 $ Q2 0.9% $176 $35 $ % Contracting & Reprographics $168 $ % $ % $174 $35 $ Q2 0.9% $176 $35 $ % Engineering During Construction $168 $ % $ % $174 $35 $ Q2 9.0% $190 $38 $ % Planning During Construction $655 $ % $ % $679 $136 $ Q2 9.0% $740 $148 $ % Project Operations $336 $ % $ % $348 $70 $ Q2 0.9% $351 $70 $ CONSTRUCTION MANAGEMENT 1.7% Construction Management $562 $ % $ % $582 $116 $ Q2 9.0% $635 $127 $ % Project Operation: $946 $ % $1, % $980 $196 $1, Q2 9.0% $1,068 $214 $1, % Project Management $492 $ % $ % $510 $102 $ Q2 9.0% $555 $111 $667 CONTRACT COST TOTALS: $45,866 $9,173 $55,040 $46,819 $9,364 $56,183 $48,706 $9,741 $58,447 Filename: Kenai River Bluffs Alt#4 TPCS May 2017 r1.xlsx TPCS

23 **** TOTAL PROJECT COST SUMMARY **** Printed:5/10/2017 Page 3 of 3 **** CONTRACT COST SUMMARY **** PROJECT: Kenai River Bluff Stabilization ALT#4 CWE - Revised DISTRICT: Alaska District PREPARED: 4/27/2017 LOCATION: Kenai, AK POC: CHIEF, COST ENGINEERING, Karl Harvey This Estimate reflects the scope and schedule in report; Kenai River Bluff Stabilization Sec 116 Study May 2017 Civil Works Work Breakdown Structure ESTIMATED COST PROJECT FIRST COST (Constant Dollar Basis) TOTAL PROJECT COST (FULLY FUNDED) Estimate Prepared: Effective Price Level: 10-Apr-17 Program Year (Budget EC): Oct-16 Effective Price Level Date: 1 OCT 17 WBS Civil Works COST CNTG CNTG TOTAL ESC COST CNTG TOTAL Mid-Point INFLATED COST CNTG FULL NUMBER Feature & Sub-Feature Description ($K) ($K) (%) ($K) (%) ($K) ($K) ($K) Date (%) ($K) ($K) ($K) A B C D E F G H I J P L M N O LOCAL SERVICE FACILITIES 02 RELOCATIONS $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 16 BANK STABILIZATION $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 16 BANK STABILIZATION $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 18 CULTURAL RESOURCE PRESERVATION $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 CONSTRUCTION ESTIMATE TOTALS: $0 $0 0.0% $0 $0 $0 $0 $0 $0 $0 01 LANDS AND DAMAGES $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 30 PLANNING, ENGINEERING & DESIGN 2.2% Project Management $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.8% Planning & Environmental Compliance $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 3.9% Engineering & Design $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.5% Reviews, ATRs, IEPRs, VE $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.5% Life Cycle Updates (cost, schedule, risks) $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.5% Contracting & Reprographics $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 0.5% Engineering During Construction $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 2.0% Planning During Construction $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 1.0% Project Operations $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 31 CONSTRUCTION MANAGEMENT 1.7% Construction Management $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 2.8% Project Operation: $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 1.5% Project Management $0 $0 0.0% $0 0.0% $0 $0 $ % $0 $0 $0 CONTRACT COST TOTALS: $0 $0 $0 $0 $0 $0 $0 $0 $0 Filename: Kenai River Bluffs Alt#4 TPCS May 2017 r1.xlsx TPCS

24 Print Date Fri 12 May 2017 U.S. Army Corps of Engineers Time 10:25:29 Eff. Date 4/15/2017 Project : Kenai River Bluff Stabilization, Alt#4 CWE - Revetting and Vegetating the Bluff Face - Weighted Toe (3A Longitudinal Dike) COE Standard Report Selections Title Page Kenai River Bluff Stabilization, Alt#4 CWE - Revetting and Vegetating the Bluff Face - Weighted Toe (3A Longitudinal Dike) The Secretary of the Army was directed in the Energy and Water Development Appropriations Act of 2002, Senate Report , to expend up to $500,000 to conduct a "special technical evaluation of bank stabilization needs along the lower Kenai River." Kenai is located on the western coast of the Kenai Peninsula, fronting Cook Inlet. It is approximately 65 air miles and 155 highway miles southwest of Anchorage. "Kenai River Bluff Erosion, Bluff Stabilization Design Alternatives, Design Alternatives Report", U.S. Army Corps of Engineers, Alaska District, June 2011, prepared by Tetra Tech provides the design of bluff stabilization along with detailed engineering drawings for the preliminary design. "Kenai River Bluff Stabilization, Kenai, Alaska, Cost Engineering Report Draft Submittal", U.S. Army Corps of Engineers, Alaska District, June 2011 contains detailed cost estimates of the construction features presented in the Design Alternatives Report dated June 2011; performed by Tetra Tech. Estimated by Designed by Prepared by POA-EC-CE / Tetra Tech Brian Ball / Tetra Tech Al Arruda Preparation Date 5/9/2017 Effective Date of Pricing 4/15/2017 Estimated Construction Time 730 Days This report is not copyrighted, but the information contained herein is For Official Use Only.

25 Print Date Fri 12 May 2017 U.S. Army Corps of Engineers Time 10:25:29 Eff. Date 4/15/2017 Project : Kenai River Bluff Stabilization, Alt#4 CWE - Revetting and Vegetating the Bluff Face - Weighted Toe (3A Longitudinal Dike) COE Standard Report Selections Project Cost Summary Report Page 1 Description Quantity UOM ContractCost Contingency MiscOwner Escalation ProjectCost Project Cost Summary Report 45,866,296 9,173, ,039,555 6,259, ,511, LANDS AND DAMAGES 1.00 EA 6,259,248 1,251, ,511,098 5,196, ,236, AQUISITIONS 1.00 EA 5,196,748 1,039, ,236,098 1,062, ,275, ADMINISTRATION 1.00 EA 1,062, , ,275, RELOCATIONS 1.00 LS 356,606 71, , Relocations 1.00 LS 356,606 71, , Pipe Demolition LF 21,588 4, , Pipe Demo Earthwork CY 12,425 2, , Pipe Demolition 1.00 LS 9,162 1, , Building and Pad Demolition 1.00 LS 291,007 58, , Overlook Demolition 1.00 LS 2, , Roadway Demolition 1.00 LS 41,130 8, , MOBILIZATION & DEMOBILIZATION 1.00 LS 1,716, , ,059,597 Mobilization 1.00 LS 858, , ,029,798 Demobilization 1.00 LS 858, , ,029, BANK STABILIZATION 1.00 LS 28,625,951 5,725, ,351, Bank Stabilization 1.00 LS 28,067,338 5,613, ,680, Site Preparation 1.00 LS 1,794, , ,153, Silt Fence 2, LF 16,332 3, , Temporary Road 5, LF 154,025 30, ,

26 Print Date Fri 12 May 2017 U.S. Army Corps of Engineers Time 10:25:29 Eff. Date 4/15/2017 Project : Kenai River Bluff Stabilization, Alt#4 CWE - Revetting and Vegetating the Bluff Face - Weighted Toe (3A Longitudinal Dike) COE Standard Report Selections Project Cost Summary Report Page 2 Description Quantity UOM ContractCost Contingency MiscOwner Escalation ProjectCost Pumping 1, DAY 613, , ,620 26, , Clearing and Grubbing 6.80 ACR 180,954 36, , Fencing 5, LF 242,139 48, , Haul Roads 7, LF 587, , , Rock - Land Based Placement 2, LCY 427,037 85, , Soil Stabilization 13, SY 123,375 24, ,051 12, , Culverts 3.00 EA 36,799 7, , Earthwork 233, CY 11,929,101 2,385, ,314, Excavation 125, BCY 4,616, , ,540, Excavation 125, CY 963, , ,155, Dispose of Unused Material 125, CY 3,653, , ,384, Borrow Material 108, BCY 7,312,188 1,462, ,774, ARMOR DIKE - Erosion Protection Rock 59, LCY 14,080,880 2,816, ,897, Rock - Land Based Placement 29, LCY 6,354,643 1,270, ,625, Rock - Water Based Placement 29, LCY 7,688,505 1,537, ,226, Rock Loading on Barge 29, LCY 436,972 87, ,

27 Print Date Fri 12 May 2017 U.S. Army Corps of Engineers Time 10:25:29 Eff. Date 4/15/2017 Project : Kenai River Bluff Stabilization, Alt#4 CWE - Revetting and Vegetating the Bluff Face - Weighted Toe (3A Longitudinal Dike) COE Standard Report Selections Project Cost Summary Report Page 3 Description Quantity UOM ContractCost Contingency MiscOwner Escalation ProjectCost Soil Stabilization - Geotex 3, SY 37,732 7, , STONE DRAIN 4, LF 262,846 52, , Rock - Land Based Placement 1, LCY 243,924 48, , Soil Stabilization - Geotex 2, SY 18,922 3, ,706 1, , Ryan s Creek Stabilization LF 558, , , Rock - Water Based Placement 1, LCY 349,359 69, , Rock Loading on Barge 1, LCY 20,494 4, ,593 1, , Steel Sheet Pile LF 209,255 41, , Steel Sheet Piles 1, VLF 78,613 15, ,335 3, , Ship steel Piles from Seattle Docks to Kenai TON 66,990 13, , Pile Driving 1, VLF 59,554 11, , Weld Piles EA 3, , Cutoffs & Cutouts LF ,908, ,489, CULTURAL RESOURCES PRESERVATION 1.00 EA 2,908, , ,489,792 1,040, ,248, HISTORICAL AMERICAN BUILDING SURVEY 1.00 EA 1,040, , ,248, , ,120, SALVAGE RECOVERY 2.00 EA 1,868, , ,241,792 2, ,072.00