The URL can be used to link to this page

Home My WebLink About1980 03 01 Other - Blackhawk Regional Wastewater I 1 1 1 BLACKHAWK REGIONAL WASTEWATER TREATMENT PLANT AND COLLECTION SYSTEM WPC-TEX-1121 1 FIRST YEAR OPERATION AND MAINTENANCE COST 1 PROJECTIONS 1 1 11 F PREPARED FOR CITY OF FRIENDSWOOD/GULF COAST WASTE DISPOSAL AUTHORITY 1 i 1 1 1 1 BY 1 ENGINEERING-SCIENCE, INC. MARCH 1980 I ES ENGINES ING- IENCE R SC 111 16915 ELCAMINO REAL • HOUSTON,TEXAS 77058 • 713/488-2944 CABLE ADDRESS: ENGINSCI TELEX: 77-5381 March 4, 1980 Gulf Coast Waste Disposal Authority 190 Bay Area Boulevard Houston, TX. 77058 Subject: First Year 0 and M Cost Projections ' Blackhawk Regional Wastewater Plant & Collection System - WPC-TEX-1121 . Attention: Mr. Jim Thornton, Deputy General Manager Dear Jim: Pursuant to 40 CFR para,. 35.929, "Requirements for the User Charge System", the attached "First Year 0 and M Cost Projections" is submitted 11 for your use in establishing 0 and M cost recovery charges. These costs and proposed allocation should provide the basis for an p P equitable distribution among the participating entities. Sufficient de- ' tail has been presented to facilitate adjustments that may be required. Appropriate cost escalations have been included to provide 1981 operation costs as realistic as possible. Please contact me if you have any questions or require additional information. Sincerely, )t-S1-1 S ephen C. Hartman Project Engineer SCH:bls cc: Mr. James C. Morgan 1 I ARCADIA•ATLANTA•AUSTIN • BERKELEY•CLEVELAND• HOUSTON •McLEAN •SAN DIEGO•WASHINGTON, D.C. r I 1 TABLE OF CONTENTS I Section I - Introduction I-1 Section II - Summary and Conclusions II-1 Section III - Variable 0 and M Costs - Table 1 III-1 - Fixed 0 and M Costs - Table 2 III-2 - Total 0 and M Costs - Table 3 III-3 ' - Notes on 0 and M Cost Tables III-4 Appendix A - Chemical Costs A-1 Appendix B - Power Costs B-1 Appendix C - Labor Costs C-1 11 I 1 1 1 11 1 SECTION I INTRODUCTION Municipal wastewater treatment works funded under the Environmental ' Protection Agency Construction Grants Program are required, through a user charge system, to recover the operational and maintenance costs incurred. The first year projected 0 and M costs, presented here are to assist the Gulf Coast Waste Disposal Authority in determining and allocat- ' ing these costs among the user entities participating in the Blackhawk ' Treatment Plant and various E.P.A. funded components of the collection system. ' The E. P.A. funded components are identified in the Tables by Contract Number and subdivided by elements. Variable 0 and M Costs are estimated for each applicable element on Table 1 and fixed 0 and M Costs are estimated for 11 each element on Table 2. Costs are allocated among the entities on a ratio of an entity' s flow rate (based onplant capacity reserved) to the total flow Y p Y rate of the entities using that element. Total Estimated First Year 0 and M Costs are shown on Table 3 as totals per entity and per contract element. Unit 0 and M cost per 1000 gallons is also shown for each entity. 1 1 1 1 I-1 II 1 IISECTION II IISUMMARY AND CONCLUSIONS II IIEstimated first year operation and maintenance costs for the Blackhawk IIRegional Wastewater Treatment Plant and E.P.A. funded components of the Col- lection System are $757,839, based on an average daily flow of 3.25 MGD. IICharges to each of the used entities required to recover the first year 0 and M costs for both the treatment plant (including the access read and the IIwater line) and the collection system are estimated to be: II Entity Capacity Treatment Plant Collection System MGD $/1000 gal . $/1000 gal . City of Friendswood 1 .415 0.571 0.094 IIWCID-108 0.46 0.571 0.059 IIClearwoods I.D. 0.5 0.571 0.118 MUD-55 0.625 0.571 0.000 IMUD-142 0.25 0.571 0.000 I These charges should provide for an equitable recovery of first year IIoperation and maintenance costs. Charges for subsequent yeqrs will be ad- justed by the actual 0 and M Costs incurred. II II II-1 ® M 1 1 11111 OLEO 1111 1 1 1 UM - - - ® 1 (1 � u Coast Was a-Disposal Authority 1111 ESTIMATED FIRST YEAR VARIABLE 0 & M COSTS Blackhawk Regional Wastewater Treat- IBER 1980 - SEPTEMBER 1981 ment Plant and Collection System - WPC-TEX-1121 sed On Capacity Reserved (5) act No. 2 Contract No. 3 Contract No. 4 Total Blackhawk N.I. 6"H2-0 Plant No.1 L.S. CID L.S. N.I . Access Road - $ - $ - $ - $ - $ - $195,209 - - 3,450 3,153 - - 91 ,462 - $ - $ 3,450 $ 3,153 $ - $ - $286,671 - - 1 .415 - _ 1 .415 $ 3,450 $127,799 $ 40,424 - - - 0.50 - - 0.50 - - - - $ 3,153 - - $ 47,093 - - - - - - $ 50,968 1 $ 20,387 NE 11111 NM MIMI LEA 11111 11111 11111 I EN 111111 MN M ® NM ESTIMATED FIRST YEAR FIXED 0 & M COSTS - SEPTEMBER 1981 acity Reserved ct No. 2 Contract No. 3 Contract No. 4 Total Blackhawk WTP N.I . 66"H0 Plant No.1 L.S. CID L.S. N.I. Access Road 837,779 _ $1 ,287,075 $510,945 timated) (Estimated) (Estimated) 43,658 $63,000 $65,000 $148,022 $1 ,074,053 $510,945 $11 ,229, 799 - FM LS FM LS 15,000 50,000 78,022 70,000 1% 1% 1% 3% 1% 3% 1% 2.5% 7,437 $ 630 $150 $1 ,500 $ 780 $2,100 $ -10,740 $ 12,773 $ 471 ,168 • 1 .415 1 .415 1 .415 1 .415 - - 1 .415 1 .415 1 .915 3.25 .415 1 .415 1 .915 3.25 5,495 $ 274 $ 150 1 ,500 $ 7,936 $ 5,561 $ 216,032 • - 0.46 - _ _ - - 0.46 3.25 3.25 $ 90 $ 1 ,808 $ 65,328 0.50 0.50 - - 0.50 0.50 . 0.50 0.50 1 .915 3.25 0.50 � -r5 3.25 ' 1 ,942 $ 97 $ 780 $2,100 $ 2,804 $ 1 ,965 $ 78,633 - 0.50 - - - - - 0.625 3.25 5 $ 121 $ 2,456 $ 79,410 0.25 0.25 3.25 5 $ 48 $ 983 $ 31 ,764 Mil 11.11 Ilia MI In 1111. ail lin MI lir ty k-iel!woortitlf glist Mit DIFIsalthoM Pue TABLE 3 ,,,1 Blackhawk Regional Wastewater Treatment Plant and "TIMATC11 'MST YEAR I 01 AL 0- & M COSTS k41 Collection System - WPC-TEX-1121 ER 1980 - SEPTEMBER 1981 )n Capacity Reserved (5) t :ONTRACT NO. 2 CONTRACT NO. 3 CONTRACT NO. 4 TOTALS ' Blackhawk N. I. 6" H20 Plant #1 L.S. CID L.S. N. I. Access Road $1 ,837,779 $1,287,075 $510,945 I ;, (Estimated) (Estimated) -(Estimated) : FM LS FM LS 1 743,658 $63,000 $157000 $50,,000 $78022 $70000 $1 ,074,053 $510,945 $11 ,229,799 $ - $ - - $ 3,450 $ - $ 3,153 $ - $ - $ 286,671 1 7,437 630 *150 1.,500 780 2,100 10,740 12,773 471 ,168 r $ 7,437, $ 630 $--5-6 $ 4,950- $ 780 $ 5,253 $10,740 $12,773 $ 757,8391 1 ii $ - $ - . $ - $3,450 - - $ - $ - $ 127,799 3 5,495 274 150 1 ,500 - - 7,936 5,561 i 216 032 , r $ 5,495 $274 $150 $4,950 - - $ 7,936 -$ 5,561 343,831 i $ - $ - - _ - - - - $ 40,424 ! 90 - - - - - 1 ,808 65,328 ' $ - T90 - - - - 1 ,808 105,752 $ - $ - - - $ - $3,153 $ - $ - $ 47,093 1 ,942 97 780 2,100 12 804 1 ,965 78,633 $1 ,942 $ 97 - - T786 $5,253 $2,804 r1 ,965 125,726 ! - $121. - - - - - $ - $ 50,968 _ - - - 2,456 79,410 - $121 - - - - - $ 2,456 130,378 _ $ - - - - - $ - $ 20,387 - 48 - - - - 983 31 ,764 - $ 48 - - - - - 983 $ 52,151 i 1 1 MIN 1 — V _ M I MIN — — 1 r M — M ® M sm.! thority ;lu j ;1 %j ion of volume treated or conveyed, and include chemical ,' : Appendix 13). of installed capacity and include costs for labor, ative services. i''i 111)1 are distributed by system component as a percentage of Annual fixed 0 & M costs will vary widely over the life aken as one percent for force mains and gravity sewers, tion of capacity range and type of treatment for plants. 1 ' d to be 20 years. � } ulated in Appendix C and are escalated at an annual rate .ies is based on the contracted capacity distribution of I In is that the entities will require the full 3.25 R1GD at fu ,cted distribution. �E I . ti j 1 1 1 APPENDIX A — CHEMICAL COSTS @ 3.25 1-1-0 1 Slaked lime - 8,828 lb/day at $61/ton plus $36/20 ton delivery surcharge $ 277/day Liquid Polymer - 47 lb/day at $2.50/lb. $ 118/day 1 Chlorine - 216 lb/day at $0.125/lb. $ 27/day City Water - 20,000 gal ./day at $1 .00/1000 gal . $ 20/day 1 Total $ 472/day 1 Chemical Costs at 10% escalation for 2 years $ 195,209/yr. 1 1 1 1 1 1 i 1 1 1 1 APPENDIX R (Continued) POWER COSTS 3. Plant No. 1 Lift Station Power Requirements ' Service: 120/240 V, 3 phase, 4 Watts I Load Description: 25 HP Service Pump 25 HP Standby Pump 50 A. , 125 Volt L-P ' Estimated Demand: Lighting: 7 KVA Pumps: 40 KVA 47 KVA on line I1 Pump @ 1000 gpm = 1 .4 RGD Average Daily Flow = 1 MGD ipump Demand Factor: 114 = 0.72 (27 KVA) (p.72) (24 hr/day) = 467 KWH/day ' (467)(30) = 13,996 KWH Calculate Power Costs: Ref: HL&P Miscellaneous General Services Rate (MGS) Rate Charge: 800 KWH @ :3.4t = $ 27.20 1 ,500 KWH @ 2.35¢ = 35.25 11 ,696 KWH @ 2.88t = 102.92 $165.37 tSystem Demand Charge: Assummed Peak Demand = 27 KUA 1 20 - 10 = 10 KVA 10 KVA x 100 = 1 ,000 KWH 1 ,000 KWH @ 3.4 = $ 34.00/mo Rate Charge $165.37 Demand Charge 34.00 1 $199.37/mo ($199.37/mo) (12) (1 .44) = $3,450 (1981 ) 6-3 !' APPENDIX B i POWER COSTS ' 1 . Blackhawk RWTP Estimated Power Consumption/Cost (1981) @ 3.25 MGD. BRWTP Service: 277/480 volt, 3 phase, 4 watt 1200 amp service, 600 KVA Drawing E-102 Load Description: 771 HP, 325 A. @ 277 V. lighting circuits 12 percent reserve capacity. Estimated Demand: Lighting Load (277 V) (300)A = 83 KVA Motor Load 771 x 746 W/HP = 575 KVA 658 KVA 11 Assume 60% demand factor: 395 KVA Calculate Power Costs 11 Ref: HL&P Miscellaneous General Service Rate (MGS) 11 Rate Charge: 395 KVA x 24 hrs/day x 30 days/mo. = 284,000 KWH/mo. 0-800 KVA at 3.4t/KWH = $ 27.70 800-2300 KWH at 2.35t/KWH = 35.25 ' 282,100 KWH at 0.88t/KWH = 2,482.48 $2,544.93/mo. ' System Demand Charge Assume peak demand @ 450 KVA 450-10 = 440 KVA 440 x 100 = 44,000 KWH 44,000 x 3.4¢ = $1 ,496/mo. demand charge. ' Rate Charge: $2,544.93 Demand Charge: 1 ,496.00 ' $4,040.93/mo. Assume 20 percent escalation for two years (1 .44) . ($4040.93)(12 months/yr. )(1 .44) = $69,827 (1981) = Average 2t/KWH B-1 APPENDIX B (Continued) POWER COSTS 2. Blackhawk Lift Station Estimated Power Consumption/Cost (1981). B.L.S. Service: 277/480 V, 3 phase, 4 W. 600 A. service, 300 KVA 1 Drawing No. E-119 Load Description: 3 pumps at 150 HP 50 A. at 120/240, 1 phase, 3W L.P. Estimated Demand: Lighting 50 x 240 = 12 KVA ' Pumps 150 HP Spare 150 HP Standby 150 HP Service= 112 KVA 124 KVA Pump Demand Factor: 2000 gal/min x 60 min/hr x 24 hrs/day = 2.8 MGD 11 Average Daily Flow @ B.L.S. = 1.8 MGD Demand Factor: 2.8 = 64% ' Estimated Daily Consumption: (120)(0.64)(24) = 1843 KWH or (1843 KWH)(30 day/mo) = 55,290 KWH/mo. 11 Calculate Power Costs Ref: HL&P Miscellaneous General Service Rate (MGS) Rate Charge: 800 KWH @ 3.4¢ = $ 27.70 11 1100 KWH @ 2.354 = 25.85 54,190 KWH @ 0.88t = 476.90 • $529.95/mo. System Demand Charge Assumed Peak Demand = 110 KVA 110 - 10 = 100 KVA ' 100 KVA x 100 = 10,000 KWH 10,000 KWH @ 3.44 _ $340/mo. ' Rate Charge = $529.95 Demand Charge = 340.00 ' $869.95/mo. ($869.95)(12)(1 .44) = $15,032.74 (1981) = Average Cost 2.2t/KWH B-2 i, 11 APPENDIX B (Continued) POWER COSTS 4. Clearwoods Improvement District Lift Station Power Requirements Service: 480 Volt, 3" Phase Load Description: 1 - 10 HP Pump 3 - 25 HP Pump 50 Amp, 125 Volt L.P. Estimated Demand: 1 - 10 HP Standby 1 - 25 HP Standby 2 - 25 HP Lead-Lag Service 11 2 x 25 = 50 HP = 37.3 KVA 50 Amp @ 125 V = 6.2 KVA • 43.5 KVA Pump Demand Factor: ' Average Daily Flow: 0.42 MGD = 292 gpm 1 Pump @ 520 GPM: 520 = 0. 56 ' (18.7 KVA)(0.56) = 10.47 KVA Lighting = 3. 5 11 14 KVA (14 KVA)(24)(30) = 10,080 KWH/mo. Power Costs: Rate Schedule: $121 .51 Demand Charge: 60.97 $182.48 ' ($182.48)(12)(1 .44) = 3153/year (1981 ) ' Average Cost: 2.6(t/KWH I 1 B-4 I I • APPENDIX C FIXED 0 & M COSTS LABOR I4.7 Operators @ $10/hr. each - 40 hr/wk. $ 8,150/month 2.0 Maintenance Workers @ $12/hr. each - 40 hr/wk. 4,160/month I0.1 Secretary @ $10/hr. - 40 hr/wk. 170/month 0.9 Lab Tech @ $10/hr. - 40 hr/wk. 1,560/month I0.7 Supervisor @$18 /hr. - 40 hr/wk. 2,000/month Subtotal $ 16,240/month MAINTENANCE IMaterial and Supplies $ 3,400/month One Pickup Truck (leased) 250/month IElectric Cart ($3,000 over 5 years 10 percent) 66/month Subtotal 3,715/nonth 1 SLUDGE DISPOSAL One tandem diesel truck with hoist - $68,000 over 5 years at 10 percent $ 1 ,500/month I Five Dumpsters (22 cu. yd. each) - $15,000 over 5 years at 10 percent 330/month Diesel fuel - 5 mpg, 2500 mi/month, $1 .20 gal . 600/month IDump fee - $1 .50/cu. yd. , 1400 cu. yd./month 2,100/month Truck driver at $10/hour 1 ,730/month Subtotal $ 6,260/month I I I APPENDIX C FIXED 0 & M COSTS ADMINISTRATIVE ' Management Fee $ 900/month Accounting Fee 400/month Subtotal $ 1 ,300/month Total $27,516/month ' Fixed 0 & M Costs at 10% escalation for 2 years $399,532/yr. 1 1 1 1