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HomeMy WebLinkAboutSewer System Report AddendumAddendum to the Sewer System Report for The Barracks Subdivision Phase 2 College Station, Texas July, 2009 Prepared Bv: HARLE ENGINEERING COMPANY TBPE Firm Registration No. 4538 3002 Texas Avenue South College Station, Texas 77845 979.693.7191 Additional Information Attached is a revised Exhibit B with the pipe flow velocity for the anticipated flows and the pipes flowing full. The pipes meet the minimum design slope per the Design Guidelines and the minimum flow velocity for pipes flowing full in accordance with the State requirements. Linc I I !l !l .... u -g .3 .3 ~ z u ... ~-&. E -g From To .,,, l . .§ ez :i "" ..., s "fi "fl ·~ 3 0 er:: er::,!!. 0: 267 GPO per MH# MH# GPOnot Acre GPO MH9 MHIO 9 I 0 I 2,403 MH8 MH9 22 I 0 S,874 Ex 7 MH8 8 0 2,136 I Ex2 Ex 7 8 0 2,136 Exhibit B The Barracks Subdivison, Phase 2 Sanitary Sewer Analysis Flow Calculations n I i!l' E -g :& ,g ~ Average Daily Flows Infillration Peaking Peak ·g ~ u I (ADF) (l0%ADF) Factor Flows 0 -Q u I.I.. d.. ::J I GPO CFS CFS CFS -2,403 0.0037 0.0004 4.00 0.015 2,403 8,277 ' 0.0128 0.0013 4.00 0.053 8,277 10,413 0.0161 0.0016 4.00 0.066 10,413 12,549 0.0194 0.0019 4.00 0.080 Pipe Calculations Pipe Flows I Manning Min . Full Full Peak Inside I Friction Design Actual Pipe Flow Flow Full Flow Peak Size Material I Slope Slope Slope(if Slope FlowV FlowV Diameter Arca Q Q Peak Peak known) Check FPS FPS Sq.Ft. CFS CFS Flows Flows I I I (in.) Inches I % •;, % 6 03034 S.793 0.0009 0.80 0.85 OK 0.183 0.472 2.58 0.0152 1.42 6 03034 S.793 ! 0.0105 I 0.80 0.85 OK 0.183 0.472 2.58 0.0525 1.85 6 03034 S.793 0.0166 0.80 0.85 OK 0.183 0.472 2.58 0.0661 1.68 I 03034 7.754 0.0051 0.40 0.40 OK 0.3279 0.705 2.15 0.07961 1.28 Item r I 2 3 4 5 6 7 8 9 JO II 12 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 i 36 HARLE ENGINEERING COMPANY 3002 Texas Avenue South College Station, Texas 77845 TBPE Firm Registration No. 4538 The Barracks Subdivision, Phase 2 Engineer's Estimate Description Unit Estimated · Sitework & Pavement ---Mobilization/Construction Staking LS I .. -------·- Excavation/Grading LS I - Mixing & incorporation of lime, 6" deeo SY 3,396 ·---- Hydrated Lime (27 lb/sy) Ton 50 6" Crushed Limestone Base SY 2,260 8" Crushed Limestone Base SY 330 -· --· 2" Hot Mix AsEhaltic Concrete SY 2,590 ~ Curb & Gutter (Laydown) I LF 1,639 Curb & Gutter (Standard) LF 175 4" Sidewalk SF 4,781 ----ADA Ramp LS 1 ·-Landscape Sleeves LF 120 -Remove & Replace End of Street Signs _.___g_A I Hydromulch Seeding (back of curb to ROW, easements) SY 3,000 Unit Price 5,ooo.ool 10,000.00 2.00 130.00 9.00 12.00 10.25 10.00 10.00 3.75 250.00 6.00 500.00 0.60 Sitework and Paving Subtotal Drainage System 18" HDPE PiEe, structural backfill LF 40 28.001 18" RCP, structural backfill LF 31 42.00 24" RCP, structural backfill LF 207 57.00 24" RCP, non-structural backfill LF 742 50.00 30" RCP, structural backfill LF 7 63.00 30" RCP, non-structural backfill LF 61 56.00 --36" HDPE Pipe, structural backfil~ LF 336 60.00 ··-36" HOPE Pipe, non-structural backfill ' LF 148 52.00 36" RCP,structural backfill LF 31 j 80.00 Junction Box EA 2 2,600.00 5' Recessed Inlet EA I 2,600.00 20' Recessed Inlet EA 2 3,600.00 10' Recessed Inlet EA 4 3,100.00 Concrete Channel SF 656 6.00 ·-Concrete Riprap SF 200 5.50 ... Connect to existing 24" pi e i EA 2 100.00 .. - Connect to existing 30" EiEe EA I 100.00 ---· Remove and ReElace Roe~ RiEraE LS I 1,000.00 -· Silt Fence LF I 600 ~-3.00 --E I -; Inlet Protection 75.00 ---Construction Exit 1,000.00 ,_____ ___ SWPPP Implementation & Maintenance 1,000.00 ..._ ____ TV Inspection LF i 922 5.00 Drainage Subtotal Page I of2 Total 5,ooo l 10,000 6,792 6,500 20,340 3,960 26,548 16,390 1,750 17,929 250 720 ·-500 1,800 $118,478 1,120 1,302 11,799 37,100 441 --3,416 20,130 7,701 2,480 5,200 2,600 7,200 12,400 3,936 1,100 200 --100 1,000 1,800 .. 450 2,000 1,000 4,609 $129,084 Item 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 The Barracks Subdivision, Phase 2 Engineer's Estimate I Unit Estimated Description uantit w s ater .ystem 6" C909 Water Pipe, non-structural backfill LF 720 8" C909 Water Pipe, non-structural backfill LF 70 Fire Hydrant Assembly (w/valve, vert. extension) EA I 6" M.J. Gate Valve ' EA 2 6"x 6" M.J. Tee EA l 6" x 45° M.J. Bend EA 2 ---->-----2" Blowoff Assembly EA I Connect to Existing Water Line EA 3 I" Water Service -LS (avg. length= 48 ft) EA I 1.5" Water Service -SS (avg. length = 5 ft) Add to Existing Line EA I I .5" Water Service -SS (avg. length = 5 ft) EA 11 1.5" Water Service -LS (avg. length= 48 ft) EA 9 s s ewer ;ystem 6" PVC Sewer Line, 03034, SOR 26, non-structural backfill LF 670 6" PVC Sewer Line, 03034, SOR 26, structural backfill LF 63 Standard 4' Manhole, 6.0-8.0 ft depth EA 3 Adjust Existing Manhole EA I TV Inspection LF 733 4" Sewer Service-_SS-Single (avg. length = 12 ft) EA l 4" Sewer Service-SS-Double (avg length = 4 ft) EA 7 4" Sewer Service-LS-Single (avg length= 47 ft) EA I 4 4" Sewer Service-LS-Double (avg length = 47 ft) EA 10 --4" Sewer Service-SS-Single add to existing 8" line ( length = 4 ft) EA I 4" Sewer Service-SS-Double add to existing 8" line ( length = 4 ft) EA I 4" Sewer Service-SS-Double add to exist 12" line (length= 214 ft) EA I -4" Sewer Service-SS-Double from existing stack (length= 4 ft) EA 3 4" Sewer Service-SS-Single from existing stack (length = 4 ft) EA 2 Unit Price Total 22.00 15,840 25.00 1,750 2,500.00 2,500 750.00 1,500 450.00 450 350.00 700 700.00 700 --400.00 1,200 1,150.00 1,150 800.00 800 700.00 7,700 1,350.00 12,150 Water Subtotal $46,440 23.00 15,410 29.00 1,827 -- 2,800.00 8,400 750.00 750 3.50 2,566 350.00 350 --400.00 2,800 950.00 3,800 1,000.00 10,000 800.00 800 800.00 800 1,200.00 1,200 250.00 750 200.00 400 Sewer Subtotal $49,853 TOTAL ESTIMATED CONSTRUCTION cosTll $343,85411 Page 2 of2