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ROCK SPRINGS PIPELINE LEVEL II PRESEN'rATION TO WYOMING WATER DEVELOPMENT COMMISSION 1989 THE STATE '\~:1J - OF WYOMING Forsgren Associates 75 Yellow Creek Road, #302 Evanston, Wyoming 82930

~- ROCK SPRINGS PIPELINE LEVEL II STUDY FUNDED BY WYOMING WATER DEVELOPMENT COMMISSION SPONSORED BY GREEN RIVER * ROCK SPRINGS * SWEETWATER COUNTY JOINT POWERS WATER BOARD Ilia FOR S G R E N ASSOCIATES 7 P.A. _ -----------

ROCK SPRINGS WATER SYSTEM SUMMARY OF PROBLEMS 1) INADEQUATE SUPPLY CAPACITY (INTAKE & TRANSMISSION LINE) - PRESENT GROWTH LIMITATION - 12 1/2% OF POPULATION NOT SERVED - INABILITY TO ACCOMMODATE ECONOMIC EXPANSION 2) EXCESSIVE PUMPING COSTS - UNDERSIZED EXISTING TRANSMISSION LINE - DOUBLE PUMPING/CONTINUOUS PUMPING - 18 PUMP STATIONS - ONLY 7 NEEDED - LACK OF DEDICATED TRANSMISSION/PEAKING STORAGE 3) POOR SYSTEM RELIABILITY/ POTENTIAL SERVICE INTERRUPTION - LACK OF SYSTEM BACK-UP - LACK OF ADEQUATELY SIZED &: LOCATED BACK-UP STORAGE - RELIANCE ON CONTINUOUS PUMP OPERATION - AGING &- DETERIORATION SYSTEM COMPONENTS NO STANDBY POWER (2 DAYS WITHOUT WATER LAST SUMMER) - JIj! FOR S G R E N ASSOCIATES I P _ .A.

80~-~ ~MOEN PUMPING VS CAPACITY EXISTING 20" AC PIPELINE 2020 PEAK DAY - 15.14 7000 (VEL - 10.7 f'ps) 2020 AVE. SUMMER DAY - 13.14 MGD 6000 (VEL - 9.3 fps) 5000 1988 PEAK DAY INCLUDING AREAS NOT SERVED - 11.01 MGD (VEL - 7.8 fps) 4000 1988 PRESENT PEAK DAY - 9.78 MGD (VEL - 6,9 fps) 3000 DESIRABLE OPERATING RANGE (VEL - 2.8 TO 5.0 fps) 2000 1988 AVE. SUMMER DAY- 1000 8.52 MGD (VEL - 6.8 fps) o~-~-~-~-~-~-~-~-~ o 2 4 6 8 10 12 14 16 PIPELINE FLOw (MGD) FIGURE 5,2 __________________________________ .. __________________________________ _ .... __ ,,,.A.

ROCK SPRINGS LEVEL 11 SUMMARY OF RECOMMENDED IMPROVEMENTS * NEW 30" ROCK SPRINGS PIPELINE - SUPPLY FOR ENTIRE ROCK SPRINGS AREA - 4 MG PEAKING STORAGE - ELIMINATE 6 PUMP STATIONS * NORTHSIDE WATER SUPPLY - SUPPLY AREAS NOT SERVED - ALLOW FUTURE GROWTH - 2 MG STORAGE TANK - ELIMINATE 3 PUMP STATIONS * STASSINOS WATER SUPPLY - SUPPLY 10-MILE DISTRICT - 150, 000 GALLON STORAGE * EAST SIDE WATER SUPPLY ELIMINATE 5 PUMP STATIONS - SUPPLY EASTSIDE AREAS - - 3 MG STORAGE TANK * NEW RAW WATER INTAKE FACILITY - ABANDON EXISTING SEDIMENTATION POND - - INCREASED CAPACITY BETTER LOCATION & MAINTENANCE - JEri FOR S G R E N ASSOCIATES I P.A. ------------ = ----------

~ ROCK SPRINGS PIPELINE -- - \ . LEVEL ' 11 STUDY !' RECOM . MENDED' PROJECT OVERVIEW PROPOSED FACILITY LEGEND PROPOSED PIPELINE TANK PUMP STATION ROCK SPRINGS

ROCK SPRINGS LEVEL 11 RECOMMENDATIONS PROJECT BUDGET * CONSTRUCTION COSTS: - 30" ROCK SPRINGS PIPELINE/ $ 9,248,000 BLAIRTOWN STORAGE 2,113,000 - NORTHSIDE WATER SUPPLY 2,830,000 - STASSINOS WATER SUPPLY 596,000 - EASTSIDE WATER SUPPLY - GREEN RIVER INTAKE FACILITY 2,417, 000 SUBTOTAL $ 17,204,000 * ENGINEERING COSTS~· $ 1,100,000 - DESIGN/SURVEY/PERMITTING - CONSTRUCTION SERVICES (10%) 1,720,000 $ 2,820,000 SUBTOTAL * 15% CONTINGENCY: $ 3, 000, 000 I $ 23,024,000 I TOTAL PROJECT BUDGET I 7,597,920 I 33% LOCAL SHARE $ I $ 383,873.00 I * ANNUAL LOAN PAYMENT (4% - 40 YEAR): * GREEN RIVER SHARE == $ 18,873/YEAR * ROCK SPRINGS 4REA SHARE == $ 365,000/YEAR jiii FOR S G R E N ASSOCIATES I P == .A.

ROCK SPRINGS LEVEL II RECOMMENDATIONS COST - BENEFIT ANALYSIS * NON-QUANTIFIABLE BENEFITS HEALTH & SAFETY - - FUTURE ECONOMIC GROWTH - PROPERTY VALUE INCREASE - CONSTRUCTION SPIN-OFF * COST BENEFIT RATIO 3D-YEAR, PRESENT WORTH, 1% GROWTH $ 18,960,000 ADDITIONAL TREATED WATER DELIVERED ELECTRICITY COST DIFFERENCE 6,133,000 PUMP STATION 0 & M REDUCTION 554,000 $ 25,647,000 /$ 23,024,000 11,11 I 30-YEAR, PRESENT WORTH, 1/2% GROWTH $ 13,411,000 ADDITIONAL TREATED WATER DELIVERED 5,041,000 ELECTRICITY COST DIFFERENCE PUMP STATION 0 &: M REDUCTION 554,000 $ 19,006,000 /$ 23,024,000 10.831 FOR S G R E N ASSOCIATEs 7 P .A.

j!i~ ROCK SPRINGS LEVEL 11 ABILITY TO PAY ANALYSIS "PRESENT POPULATION" * PRESENT "EQUIVALENT' WATER USERS CITY OF ROCK SPRINGS WATER USERS 11, 1 95 FUTURE SERVICE AREA WATER USERS 540 TOTAL E)(ISTING WATER USERS 11,735 * PROJECTED WATER USER RATES $ 22.95 EXISTING MONTHLY WATER BILLING ROCK SPRINGS PIPELINE PROJECT BILLING 2.59 $ 25.54 TOTAL PROJECTED MONTHLY BILLING * POTENTIAL ENERGY COST SA VINGS - 1.34 * POTENTIAL MONTHLY WATER USER RATE 1$ 24.20 I FOR S G R E N ASSOCIATES 7 P.A. ----------=-- ------------ ;

APPENDIX: Detailed Information

ROCK SPRINGS LEVEL II RECOMMENDATIONS ROCK SPRINGS TRANSMISSION LINE * NEW 30" T. W. STEEL OR D.I. PIPELINE * PREFERRED NORTHSIDE ROUTING * ABANDON SIX PUMP STATIONS - WEST, MIDDLE, EAST KANDA - INDUSTRIAL - SWEETS - BLAIRTOWN * REPLACE GREEN RIVER PUMPS * CONSTRUCT NEW 4 MG BLAIRTOWN TANK FORSGREN AssocIATES I p.A.

~G ~ 18 OPTIMAL PIPE SIZE = 30' 16 14 TOTAL 30-YEAR p,,,,, COST FUTURE 30- YEAR REPLACEMENT OF 20' AC LINE 12 r- (/.) D U 10 8 PIPELINE/PUMP STATION CONSTRUCTION COST 6 4 / 30-YEAR P • ..,. ENERGY COST • • 2 • • • 4 MG BLAIRTo'WN 30-YEAR COMPARITIVE o to. M TANK CONSTRUCTION o o 36// 24" 30" PIPE DIAMETER ROCK SPRINGS PIPELINE OPTIMAL PIPE SIZE FIGURE 8.1 ._. n~ R E N I P.A. OC T

~ .~1i ~ ROCK SPRINGS LEVEL II RECOMMENDATIONS NEW NORTHSIDE TRANSMISSION * NEW 14 TO 18 INCH PVC TRANS. LINE TO WHITE MOUNTAIN * DIRECT SUPPLY FOR CLEARVIEW & WHITE MOUNTAIN DISTRICTS * SUPPLEMENTAL SUPPLY TO ROCK SPRINGS NORTHSIDE AREA * NEW 2 MG WHITE MOUNTAIN TANK * TWO NEW PUMP STATIONS - RETROFIT INDUSTRIAL - CONSTRUCT WHITE MOUNTAIN * ABANDON THREE OLD PUMP STATIONS - ELK STREET - FOOTHILLS - OUTLAW * ABANDON CLEAR VIEW TANKS 1 S G R E N S oe ATES I P.A.

ROCK SPRINGS LEVEL II RECOMMENDATIONS 10-MILE WATER & SEWER DISTRICT (STASSINOS) * NEW 8-INCH PVC TRANS. LINE FROM WHITE MOUNTAIN TO STASSINOS * NEW 0.15 MG STORAGE TANK AT STASSINOS * GRAVITY-FED SUPPLY - NO PUMP STATIONS FOR S G R E N ASSOCIATES I P.A.

ROCK SPRINGS LEVEL II RECOMMENDATIONS NEW EASTSIDE TRANSMISSION * NEW 18" PVC TRANSMISSION * HIGHWAY 376 ROUTING * NEW 3 MG EASTSIDE STORAGE * CONSTRUCT NEW EASTSIDE PUMP STATION * ABANDON FIVE OLD PUMP STATIONS - THOMPSON - D STREET - SUNSET - BIGHORN - EDGAR * ABANDON THREE TANKS - EDGAR - SUNSET - PALISADES FORSGREN ASSOCIATEs J P.A.

ROCK SPRINGS LEVEL II RECOMMENDATIONS NEW RAW WATER INTAKE FACILITY * ABANDON EXISTING INTAKE FACILITY * CONSTRUCT NEW FACILITY NEAR TREATMENT PLANT - 90,000 SF SETTLEMENT BASIN - 16,000 GPM CAPACITY - CUT-OFF WALL/CHANNEL STABILIZATION - AUTOMATED MAINTENANCE FEATURES - SLUDGE DRYING BEDS FORSGREN ASSOCIATES I P .A.

j_~FORSQREN ~ ~ 32 33 34 20 N. 5 8 11 LIONKOL • RESERVOIR 16 17 -- LEGEND ZONE 1 EXISTING BASE ZONE ZONE 2 EXISTING FOOTHILLS ZON:: ZONE 3 EXISTING 'w'ASHINGTON AVE. ZONE ZONE .. EXISTING THOMPSON STREET ZONE ZONE 5 EXISTING BIG HORN ZONE ZONE 6 EXISTING SPRINGS DRIVE ZONE 21 22 19 24 ZONE 7 EXISTING EDGER STREET ZONE ZONE 8 EXISTING SUNSET ZONE ZONE 9 EXISTING COLLEGE ZONE ZONE 10 EXISTING OUTLA'w' ZONE ZONE 11 EXISTING ELK STREET ZONE ZONE 12 EXISTING S'w'EETS ZONE ZONE 13 EXISTING HILL TOP ZONE ZONE H EXISTING RELIANCE ZONE 30 29 SUNSET PUMP STATlDN CLEARVIE'J 31 SOUTH RESERVOIR T. 19 N. 6 If) o .. .. . INDUSTRIAL PUMP STATION OF CITY ROCK SPRINGS PRESENT SERVICE ZONES AND SYSTEM COMPONENTS Fl_G_URl _____ 5_.3 ________________ -, __________________________________ ________ 5£ AeeoCIATa I ,. ...

~".A. ~ ~ IFO~EN ~ DIR ~ .R L L ~ ~ ~ ~ ~ ~ - MATC \ 32 33 34 • 5 T. 20 N. • • ZO 2 ~ I • t:J • 6 5 1 • CJ • • I • ZONE 5 • ..J ;::; • • • • 8 20 11 \ • • ZONE 5 17 4 29 - • • ZONE 5 LEGEND I 19 ZONE 1 PROPOSED BASE ZONE 1 22 24 ZONE 2 PROPOSED WIND RIVER ZONE ZONE 3 PROPOSED WASHINGTON AVE . ZONE • ZONE 4 PROPOSED EAST SIDE ZONE • ZONE 5 PROPOSED "HLTE MOUNTAIN ZONE ZONE 6 ' PROPOSED GATEWAY ZONE I PR[1POSED IMPROVEMENTS X rACIUTlES TO BE ABANDONED 30 29 TIE T(] CLEARVIE'w' 31 T. 19 N. 6 Lf) o ....... L- .. """' .. INDUSTRIAL PUMP STATION CITY OF ROCK SPRINGS PROPOSED SERVICE ZONES AND SYSTEM COMPONENTS ________________________________ __________ r_lG_U_R_£_8_._2 ______________