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Exhibit MSD 84N - Stormwater Conceptual and Preliminary Design Information
Exhibit MSD 84N 1,450 1,400 1,350 1,300 1,250 1,200 1,150 1,100 1,050 1,000 LT 950 41 900 0 850 800 c. 750 0 700 650 600 550 500 450 400 350 300 250 200 Cost per foot Reinforced Concrete Wall (based on 11/2005 preliminary costs) 4 9 10 11 12 13 14 15 16 17 18 19 20 Average Height (ft) Legend Existing Sideslope —e-- Ex Slope Vertical — Ex Slope 0.5:1 —-- Ex Slope 1:1 August 25, 2008 Cost per foot ($/LF) $1,600 $1,550 $1,500 $1,450 $1,400 $1,350 $1,300 $1,250 $1,200 $1,150 $1,100 $1,050 $1,000 $950 $900 $850 $800 $750 $700 $650 $600 $550 $500 $450 $400 $350 $300 $250 6 Cost per foot Gabion Wall (based on 1112005 preliminary costs) 7 8 9 10 11 12 Average Height (ft) 13 14 15 16 Legend Existing Sideslope —40— Ex Slope Vertical t Ex Slope = 0.5:1 Ex Slope = 1:1 August 25, 2008 Cost per foot (VLF) $1,100 $1,050 $1,000 $950 $900 $850 $800 $750 $700 $650 $600 $550 $500 $450 $400 $350 $300 $250 6 8 10 Cost per foot Modular Block Wall (based on 11/2005 preliminary costs) 12 14 16 Average Height (ft) 18 20 22 Legend Existing Sideslope — 6- Ex Slope Vertical • -0— Ex Slope = 0.5:1 — -Ex Slope = 1:1 August 25, 2008 400 375 350 325 300 - 457, 275 _ "° 250 _ 0. ti c 225 - 200 Cost per foot Under Pavement (12"-30") RCP (based on 11/2005 preliminary costs) 175 or- 150 �er �0 125 100 - 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Average Depth (ft) — ►-12"RCP —0--15" RCP —&.-18" RCP —X-- 21" RCP - -•24"RCP — — 27" RCP — e--30"RCP 800 750 700 650 600 Cost per Foot Under Pavement (36"-72") RCP (based on 11/2005 preliminary costs) E 550 _ 500 u a 450 v 400 - 350 300-` 250 f t 200 -+� 150 410 —r— at ' x 4 5 6 7 8 9 '10 11 12 13 14 15 16 17 18 19 20 21 22 23 2 25 Average Depth (ft) 36" RCP — �-42"RCP 48" RCP — *-54"RCP — 60" RCP — ♦ - 66" RCP —e-- 72" RCP 200 175 150 75 Cost per foot with Sodding (12"-30") RCP (based on 11/2005 preliminary costs) 50 a I r I F I I I 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Average Depth (ft) -�� 12" RCP — o--15"RCP - 18" RCP — *-21"RCP - 24" RCP — ♦ - 27" RCP - 30" RCP Cost per Foot with Sodding (36"-72") RCP (based on 11/2005 preliminary costs) 500 450 400 - 350 y r --• 15 — �x- oo� -- it a300 , -�t� —x- — -x — —xr a _-m_—)(- o u 250 — 200 150 100 -- r' X ►cam LAIA • — 1 4 5 8 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Average Depth (ft) -+- 36" RCP - MI- -42" RCP -A- 48" RCP - - 54" RCP - 60" RCP - ♦-66"RCP -O- 72" RCP Cost per foot ($Ift) 1100 1000 900 800 700 600 500 400 300 200 J► �� r 100 4 5 6 r • Cost per foot Heavy Stone Revetment Proposed Sideslope = Existing Sideslope (based on 11/2005 preliminary costs) ► ► ►• 7 8 9 10 11 12 13 14 Average Height (ft) 15 16 4 17 18 19 20 — —1.5:1 slope —0-- 2:1 slope - 1�- 2.5:1 slope 3:1 slope January 2009 Cost per foot ($/ft) 1400 1300 1200 1100 1000 900 800 700 600 500 - 400 300 200 r- 100 �r- 4 5 6 r r - _ Cost per foot Heavy Stone Revetment Existing Sideslope = Vertical (based on 1112005 preliminary costs) -a- 7 8 9 10 11 12 13 14 Average Height (ft) _ 15 16 17 18 19 20 Legend Proposed Sideslope — ♦ —1.5:1 slope —e— 2:1 slope - -A— 2.5:1 slope -F. 3:1 slope January 2009 Cost per foot (Sift) 1400 1300 1200 Cost per foot Heavy Stone Revetment Existing Sideslope = 1:1 (based on 11/2005 preliminary costs) 1100 1000 900 800 700 600 500 400 300 200 f 100 _ 4 5 8 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Average Height (ft) Legend Proposed Sideslope — ♦ -1.5:1 slope -- 2:1 slope —A— 2.5:1 slope -- 3:1 slope January 2009 Cost per foot ($/ft) 1400 1300 1200 1100 1000 900 800 700 600 Cost per foot Heavy Stone Revetment Existing Sideslope = 0.5:1 (based on 11/2005 preliminary costs) 500 �� 400 300 200 100 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Average Height (ft) Lepad hopped Sidadope — —1.5:1 slope — — 2:1 slope f 2.5:1 slope — 4E—3:1 slope January 2009 Cost per foot ($/ft) 1200 1100 1000 900 800 700 600 500 400 300 200 100 4 Cost per foot Heavy Stone Revetment Existing Sideslope =1.5:1 (based on 11/2005 preliminary costs) 5 6 7 8 9 10 11 12 13 14 Average Height (ft) 15 16 17 18 19 20 Legend Proposed Sideslope — — 1.5:1 slope - -0-- 2:1 slope — 1*— 2.5:1 slope — 94-- 3:1 slope January 2009 Cost per foot ($Ift) 1200 1100 1000 900 800 700 600 500 400 300 200 100 4 Cost per foot Heavy Stone Revetment Existing Sideslope = 2:1 (based on 11/2005 preliminary costs) 9 10 11 12 13 14 15 16 17 18 Average Height (ft) 19 20 Legend Proposed Sideslope — ♦-1.5:1 slope - -- 2:1 slope — A— 2.5:1 slope — 3:1 slope January 2009 Cost per foot ($Ift) 1100 1000 900 800 700 600 500 400 300 200 100 4 Cost per foot Heavy Stone Revetment Existing Sideslope = 2.5:1 (based on 11/2005 preliminary costs) 10 11 12 13 14 15 16 17 18 19 20 Average Height (ft) Legend — al- —1.5:1 slope --m-- 2:1 slope —A-- 2.5:1 slope -- 3:1 slope January 2009 Cost per foot (Sift) 1100 1000 900 800 700 600 500 400 300 Cost per foot Heavy Stone Revetment Existing Sideslope = 3:1 (based on 11/2005 preliminary costs) 200 _ �- 100 4 5 6 a 7 X 8 -- — •— 9 10 11 12 13 14 Average Height (ft) • -I' �-S 15 16 17 18 19 20 Lewd Proposed Sideslope — -1.5:1 slope f 2:1 slope —As-- 2.5:1 slope -- 3:1 slope January 2009