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HomeMy WebLinkAbout07-08-19 Drainage and Flooding Committee MeetingJAY MARTIN CHAIRMAN DANNY EARP VICE-CHAIRMAN CHUCK ENGELKEN MEMBER CITY OF LA PORTE DRAINAGE AND FLOODING COMMITTEE MEETING AGENDA STEV E G I L L ETT ALTERNATE Notice is hereby given of a meeting of the Drainage and Flooding Committee of the City Council of the City of La Porte, to be held July 8, 2019, in the City Hall Council Chambers, 604 West Fairmont Parkway, La Porte, Texas, beginning at 5:00 pm to consider the following items of business. 1. Call to order 2. Statutory Agenda (a) Approve minutes of the meeting held on May 13, 2019. [Jay Martin, Chairman] (b) Receive report from Harris County Flood Control District regarding current and future plans relating to flooding in the City of La Porte. [Lorenzo Wingate, P.E., City Engineer] (c) Presentation, discussion, and possible action regarding the status of current drainage projects. [Lorenzo Wingate, P.E., City Engineer] (d) Presentation, discussion, and possible action regarding additional drainage concerns and providing staff with direction. [Lorenzo Wingate, P.E., City Engineer] 3. Set date for next Drainage and Flooding Committee Meeting 4. Committee Member Comments Hear announcements concerning matters appearing on the agenda; items of community interest; and/or inquiries of staff regarding specific factual information or existing policy from the Committee members and City staff, for which no formal action will be discussed or taken. 5. Adjournment If, during the course of the meeting and discussion of any items covered by this notice, the Drainage and Flooding Committee determines that Closed or Executive Session of the Committee is required, then such closed meeting will be held as authorized by Texas Government Code, Chapter 551, Section 551.071 - consultation with counsel on legal matters; Section 551.072 - deliberation regarding purchase, exchange, lease or value of real property, Section 551.073 - deliberation regarding a prospective gift; Section 551.074 - personnel matters regarding the appointment, employment, evaluation, reassignment, duties, discipline, or dismissal of a public officer or employee; Section 551.076 - implementation of security personnel or devices; Section 551.087 - deliberation regarding economic development negotiation; Section 551.089 - deliberation regarding security devices or security audits, and/or other matters as authorized under the Texas Government Code. If a Closed or Executive Session is held in accordance with the Texas Government Code as set out above, the Drainage and Flooding Committee will reconvene in Open Session in order to take action, if necessary, on the items addressed during Executive Session. Persons with disabilities who plan to attend this meeting and who may need auxiliary aids or services are requested to contact the City Secretary's office (281-470-5019), two working days prior to the meeting for appropriate arrangements. Councilmembers may attend in numbers constituting a quorum. This is a Drainage and Flooding Committee Meeting at which there will be no deliberation or formal action taken by City Council as a governmental body. CERTIFICATE I, Lee Woodward, City Secretary, do hereby certify that a copy of the July 8, 2019, Drainage and Flooding Committee agenda was posted on the City Hall bulletin board, a place convenient and readily accessible to the general public at all times, and to the City's website, www.LaPorteTXgov, in compliance with Chapter 551, Texas Go\,emment Code. DATE OF POSTING TIME OF POSTING TAKEN DOWN Lee Woodward, City Secretary JAY MARTIN Chairman DANNY EARP Vice -Chairman MINUTES OF DRAINAGE AND FLOODING COMMITTEE MEETING HELD MAY 13, 2019 CHUCK ENGELKEN Member JOHN ZEMANEK Alternate Member The Drainage and Flooding Committee of the City of La Porte met on Monday, May 13, 2019, at the City Hall Council Chambers, 604 West Fairmont Parkway, La Porte, Texas, at 5:00 p.m. to consider the following items of business: Committee Members present: Jay Martin, Danny Earp, Chuck Engelken (arrived at 5:32 p.m.) Committee Members absent: John Zemanek Council -appointed officers present: Corby Alexander, City Manager; Lee Woodward, City Secretary 1. Call to Order - Chairman Martin called the meetina to order at 5:02 o.m. 2. Authorizations (a) Approve the minutes of the meeting held on April 8, 2019. [Lee Woodward, City Secretary] Vice Chairman Earp moved to approve the minutes of the meeting held on April 8, 2019; the motion was unanimously adopted, 2-0. Staff Reports (a) Receive report from Harris County Flood Control District regarding current and future plans relating to flooding in the City of La Porte. [Lorenzo Wingate, City Engineer, and Don Pennell, Public Works Director] Jeremy Ratcliff of Harris County Flood Control District (HCFCD) said he hoped he could attend the first meeting of the month every other month. He said that on Brookglen, three alternatives were proposed in draft and needed some additional modeling and move to a PER stage this summer and added that Russ Poppe was including a benefits matrix for all their projects. Committee member Earp asked to also note timing of the entire project life cycle. Mr. Ratcliff said that F-10106 (Lomax/Pipeline Corridor) would begin this summer. Vice Chairman Earp said two projects in that area needed a greatly increased timetable, especially at the dam at the pipeline. Mr. Wingate reminded all that City spending was holding for state grant funding, but Mr. Ratcliff said it would not hold up the HCFCD work. Mr. Ratcliff said the desilt would probably happen early this summer (as part of the Choctaw Package) but there were utility and other conflicts for the portion across the top and that HDR would review it. Mr. Pennell said the City had done the flow work and were waiting on HCFCD for design. Vice Chairman Earp said the work at Sens Road to the railroad tracks was coming along. Mr. Ratcliff said it was possible HCFCD would need some assistance with the railroad. Mr. Wingate noted Flood Control did not have easements or legal access to but the City did and could clear and clean there. Mr. Pennell said his department would propose to buy new equipment and take care of it in house. Chairman Martin asked about the Brookglen buyout situation and Mr. Ratcliff said there were two -three homes with offers and six waiting on appraisals. Mr. Ratcliff said the summer mowing agreement would be reviewed for lots and channel work cycles and were expected to begin in June (HCFCD, HC Precinct 2, and the City were all participating). Page 1 of 2 May 13, 2019 - Drainage and Flooding Committee Minutes (b) Discussion regarding Texas Department of Emergency Management (TDEM) Hurricane Harvey DR-4332 Section 404 Hazard Mitigation Grant Program (HMGP) funding. [Lorenzo Wingate, City Engineer and Don Pennell, Public Works Director] Mr. Wingate said the City has submitted eight projects and had been told selection was expected in July and those chosen could begin in January 2020. Chair Martin asked what would occur then and Mr. Wingate said procuring engineering services and beginning design. (c) Presentation, discussion, and possible action regarding the status of current drainage projects. [Lorenzo Wingate, City Engineer, and Don Pennell, Public Works Director] Mr. Wingate referred to information included on the project list. (d) Presentation, discussion and possible action regarding additional drainage concerns and provide staff with direction. [Lorenzo Wingate, City Engineer, and Don Pennell, Public Works Director] Mr. Wingate referred to information included on the project list. 4. Set date for next Drainage and Flooding Committee Meeting The next meeting date was set for June 10, 2019 at 5:00 p.m. Committee Comments No comments were offered. ADJOURN — The meeting was adjourned without objection at 5:40 p.m. Lee Woodward, City Secretary Page 2 of 2 May 13, 2019 - Drainage and Flooding Committee Minutes REQUEST FOR DRAINAGE & FLOODING COMMITEE AGENDA ITEM Agenda Date Requested: July 8, 2019 Requested By: Lorenzo Wingate, P.E. Department: Public Works Report i' Resolution i' Ordinance Exhibits: Appropriation Source of Funds: Account Number: Amount Budgeted: Amount Requested: Budgeted Item: ir Yes ir' No SUMMARY Receive report regarding Harris County Flood Control District current and future plans relating to flooding in the City of La Porte. RECOMMENDED MOTION Approved for Drainage Committee Agenda Corby D. Alexander, City Manager Date REQUEST FOR DRAINAGE & FLOODING COMMITEE AGENDA ITEM Agenda Date Requested: July 8, 2019 Requested By: Lorenzo Wingate, P.E. Department: Public Works Report i' Resolution i' Ordinance Exhibits: Map Project update chart Appropriation Source of Funds: Account Number: Amount Budgeted: Amount Requested: Budgeted Item: ir Yes ir' No SUMMARY Refer to attached Exhibit(s) for updates on various drainage projects throughout the City. RECOMMENDED MOTION Approved for Drainage Committee Agenda Corby D. 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N E N o m - c a c 3 c _ - v n o' Z .°N.° a o .3 N E o o E U E, a = -O o o to v E m �uv v v m m y _ mNoo N ..v ° -o ovv'" co 3V orn o r m° m`" Ec rn N V °... 2 r tin ° rn v w mn E `v ` m N a° m �= v, ` $ ar°n 3 �Y win o lo lo $a wn° o 2-EE H � E W r i A A > > = O A T U 0 0 0. E y p E p E U o 00 _ C o C o i 1 Z n U o f Q o f Q Q O O O N M Z REQUEST FOR DRAINAGE & FLOODING COMMITEE AGENDA ITEM Agenda Date Requested: July 8, 2019 Requested By: Lorenzo Wingate, P.E. Department: Public Works Report i' Resolution i' Ordinance Exhibits: Sens Road construction drawings LCB Watershed study data Roseberry Junction Box Appropriation Source of Funds: Account Number: Amount Budgeted: Amount Requested: Budgeted Item: ir Yes ir' No SUMMARY Opportunity to discuss any drainage concerns not covered by previous items. • Sens Rd/H Street Drainage • Outfalls along Roseberry RECOMMENDED MOTION Approved for Drainage Committee Agenda Corby D. 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CONCLUSIONS The proposed improvements analyzed in this report show that significant flood control benefits will be gained with the implementation of the proposed channel improvements and linear detention pond. upstream of SH 146. The first project, which includes improvements up to the Southern Pacific Railroad (SPRR), will reduce. the 100 year water surface elevation by more than a foot (1.46') and will reduce the 100 year top width by as much as 3,354' at West Barbours Cut Boulevard. This project is estimated to cost approximately $2 million. The second project analyzed in this report included improving the channel all the way to Sens Road. This project produced the same results up to SPRR as the first project. Upstream of SPRR the 100 year water surface elevation is reduced an additional 0.31' over the first project at Sens Road, and the 100 year top width is reduced more than the first project by more than 950' downstream of Sens Road. The second project is estimated to cost approximately $3.2 million. Table 1, following this page, summarizes the flood control benefits and construction costs of the plans discussed in this report. Based on the standard analysis techniques and rainfall patterns used in this study, the proposed improvements presented in this report will produce mo adverse effects on the Little Cedar Bayou Watershed, or adjoining. areas. 16 Binkley & Barfield, Inc. Consulting Engineers Water Surface Elevation and Top Width Comparison Updated Base Model vs Proposed Model {with Improvements to SPRR) i-- a; Notes Each SECNO listed represents the 10- and 100-year storms, respectively. BASE represents the updated base model which includes survey sections to Sens Road. PRO represents the proposed model which inc!udes improvements up to SPRR_ SECNO Water Surface Elevation ft.) L_ op Width ft. BASE © PRO -BASE PRO BASE A PRO -BASE PRO 0 3.3 -0.02 3.28 137.22 -0.08 137.14 0 4.57 -0.03 4.54 141.35 -0.08 141.27 0 0 528 3.96 -0.02 3.94 154.08 -0.26 153.82 528 5.22 -0.02 5.2 168.39 -0.28 168.11 0 0 1818 6.38 -0.03 6.35 126.57 -0.3 126.27 1818 7.65 -0.03 7.62 142.8 -0.32 142.48 0 0 1903 6.53 -0.02 6.51 102.46 -0.08 102.38 1903 7.82 -0,02 7.8 109.6 -0.15 109.45 0 0 1953 6.57 -0.03 6,54 102.58 -0.08 102.5 1953 7.87 -0.02 7.85 109.92 -0.16 109.76 0 0 1990 6.58 -0.02 6.56 102.62 -0.08 102.54 1990 7.89 -0.03 7.86 110.01 -0.15 109.86 0 0 2040 6.62 -0.03 6.59 102.74 -0.08 102.66 2040 7.94 -0.03 7.91 110.31 -0.16 110.15 0 0 2910 7.2 -0.03 7.17 130.51 -0.28 130.23 2910 8.68 -0.03 8.65 144.55 -0.3 144.25 0 0 3660 8.11 -0.03 8.08 98.38 -1.15 97.23 3660 9.61 -0.03 9.58 143.32 -1.05 142.27 0 0 4240 8.88 -0.04 8.84 86.63 -0.31 86.32 4240 1 10.51 -0.04 10.47 189.43 -3.97 185.46 0 0 4778 9.97 -0.04 9.93 65.42 -0.3 65.12 4778 11.53 -0.04 11.49 268.39 -11.68 256.71 0 0 5555 11.23 -0.04 11.19 79.46 -0.26 79.2 5555 12.79 -0A3 12.76 1308.62 -16A2 1292.2 0 0 5616 11.27 -0.04 11.23 85.01 -0,24 84.83 5616 12.82 -0.03 12.79 1321.96 -15.45 1306.51 0 0 5828 11.31 -0.05 11.26 87.28 -0.25 87.03 5828 12.86 -0.03 12.83 1076.98 -14.47 1062.51 0 0 5864 11.31 -0.04 11.27 87.01 -0.25 86.76 5864 12.86 -0.03 12.83 92 0 92 0 0 5904 11.31 -0.04 11.27 86.47 -0.26 86.21 5904 12,86 -0,03 12.83 92 0 92 0 0 5940 11.32 -0.05 11.27 86.49 -0.26 86.23 1/5 01/20/2000 z 0 to = 't7 LL ca z cn _j z Water Surface Elevation and Top Width Comparison Updated Base Model vs. Proposed Model (with Improvements to SPRR) SECNO Water Surface Elevation (ft.) To Width (ft.) BASE A PRO•BASE PRO BASE A PRO -BASE PRO 5940 12.87 -0.03 12.84 1081.56 -14.41 1067.15 0 0 6151 11.34 -0.05 11.29 88.21 1 -0-27 87.94 6151 12.9 -0.03 12.87 1096.47 -14.89 1081.58 0 0 6274 11.35 -0.05 11.3 87.96 -0.27 87.69 6274 12.91 -0.03 12.88 542.15 -44.98 497.17 0 0 6696 11.41 -0.04 11.37 78.44 -0.25 78.19 6696 12.98 -0.03 12.95 388.96 -34.63 354.33 0 0 6746 11.46 -0.04 11.42 99.29 -0.21 99.08 6746 13.05 -0.03 13.02 428.27 -30,91 397.36 0 0 6840 11.5 -0.05 11.45 99.18 -0.2 98.98 6840 13.15 -0.04 13.11 482.04 -28.02 454.02 0 0 6889 11.49 -0-05 11.44 78.73 -0,27 78.46 6889 13.13 -0.03 13.1 535.8 -56.38 479.42 0 0 6959 11.51 -0.04 11.47 81.82 -0.28 81.54 6959 13.16 -0.03 13.13 475,79 -18.24 457.55 0 0 7434 11.64 -0.04 11.6 77.4 -0,28 77.12 7434 13.3 -0.03 13.27 301.95 -8.35 293.6 0 0 7494 11.65 -0.04 11.61 64.14 -0.23 63.91 7494 13.31 _0.04 1327 296.74 -9.02 287,72 0 0 7514 11.65 -0.04 11.61 58.11 -0.21 57.9 7514 13.3 -0-03 13.27 1 281.94 -10.2 271.74 0 0 7534 11.65 -0.05 11.6 54.38 -0.19 54.19 7534 13.29 -0.03 13.26 274.88 -10.2 264.68 0 0 7899 117 -0.04 11.66 52.92 -0.19 52.73 7899 13.36 -0.03 1333 65.12 -0.24 64.88 0 0 7947 11.76 -0.05 11.71 90.78 -2.6 88-18 7947 13.43 -0.04 13.39 304.21 -3.34 300.87 0 0 7992 12.16 -0.06 12.1 51 0 51 7992 14.43 -0.07 14.36 577.29 -22.39 554.9 0 0 8019 12.23 -0.05 12.18 137 0 137 8019 14.51 -0.07 14.44 298.78 .17.11 1 281.67 0 0 1 8254 123 -0.06 12.24 158.81 -3.06 1 155.75 Notes: Each SECNO listed represents the 10- and 100-year storms, respectively. BASE represents the updated base model which includes survey sections to Sens Road. 215 PRO represents the proposed model which includes improvements up to SPRR. 014/20/2000 'r rn co <rI Water Surface Elevation and Top Widt6- Comparison Updated Base Model vs Proposed Model (with Improvements to 8i ' SPRR) SECNO Water Surface Elevation (ft.) To Width (ft. BASE A PRO -BASE PRO BASE A PRO -BASE PRO 8254 14.7 -0.07 14.63 168.11 -0.27 167.84 0 0 8304 12.28 -0.06 12.22 129.23 -1.13 128.1 8304 14.68 -0.07 14.61 567.8 -33.6 534.2 0 0 8349 12.7 -0.08 12.62 1 79-83 -1.42 78.41 8349 15.79 -0.11 15.68 1048.78 1 -28-82 1019.96 0 0 8432 12.74 -0.07 12.67 142.36 -2.36 140 8432 15.8 -0.11 15.69 1052.08 -28.7 1023.38 8461 NA 12.66 NA 73.1 8461 NA 15.68 NA 1203.77 1 8712 12.9 -0.11 1279 80.33 206.46 286.79 8712 15.86 -0.11 15.75 1303.81 -54.47 1249,34 0 0 10012 14.43 -1.62 12.81 77.32 164.08 241.4 10012 16.49 -0,73 15.76 177.98 83.98 261.96 10900 NA 12.84 NA 1 214.12 10900 NA 15.78 NA 234.63 11124 NA 12.85 NA 132.95 11124 NA 15.78 NA 153.62 11174 15.18 -2.36 12.82 88.66 -41.57 47.09 11174 16.98 -1.22 1536 624.37 -507.74 j 116,63- 0 0 11327 15.28 -2.29 12.99 53.78 -6.63 47.15 11327 17.04 -122 15.82 125.6 -49.68 75.92 0 0 12098 15.91 -2.04 13.87 52.75 -9.96 42.79 12098 17.51 -1.29 16.22 47129 -413.44 59.85 0 0 12198 15.96 -1.97 1199 60.12 -15.26 44.86 12198 17.55 -1.27 16.28 525.57 -452.98 72.59 0 0 12248 15.98 -1.95 14.03 52.23 -7.32 44.91 12248 17.56 -1.25 16.31 365.4 -295.23 70.17 0 0 12280 16 -1-98 14.02 38.84 -10.92 27.92 12280 17.6 -1.31 16.29 92.53 -42.9 49.63 0 0 12382 16.01 -1.97 14.04 39.25 -11.27 27.98 12382 17.6 -1.3 16.3 92.79 -42.63 50.16 -16.07 0 0 12414 ! -1,96 14.11 43.41 3.6 47.01 Notes. Each SECNO listed represents the 10- and 1 00-year storms, respectively. BASE represents the updated base mcdei which includes survey sections to Sens Road. 315 PRO represents the proposed model which includes improvements up to SPRR_ 01,120/2000 I Water Surface Elevation and Top Width Comparison Updated Base Model vs; Proposed Model (with Improvements to SPRR) SECNO Water Surface ElevationlLg ToWidth ft... p ( -BASE G PRO -BASE PRO BASE PRO -BASE PRO 12414 17.62 -1.24 16.38 330.6 -269.99 60.61 0 0 12464 16.14 -1.98 14.16 71.48 -19.38 52.1 12464 17,71 -1.3 16.41 311.6 -236.64 74.96 0 0 12564 16.17 -1.97 14.2 56.72 -10.81 45.91 12564 17.72 -1.29 16.43 368.3 -303.46 64.84 0 0 13864 17.1 -2 15.1 37.54 9.82 47.36 13864 18.46 -1.46 17 70.96 -12.17 58.79 0 0 14246 17.29 -1.94 15.35 244.4 -203.31 41.09 14246 1&6 -1.42 17.18 2983.51 -2802.14 181.37 0 0 15321 17.48 -1.59 15.89 586.71 -505.23 81.48 15321 18.64 -1.14 17.5 3208.19 -2599.13 609.06 0 0 15371 17.49 -1.58 15,91 27 0 27 15371 18.64 -1.15 17,49 321.2.01 -3184.84 27.17 0 0 15400 17.53 -1.59 15.94 27 0 27 15400 18.82 -1.21 1T61 3381.29 -3354.12 27.17 0 0 15450 1 17.56 -1.57 1 15.99 722.42 -634.88 87.54 15450 18.82 -1.14 1 17-68 3382.52 -2252.94 1129.58 0 0 15635 17.58 -1.52 16.06 241.45 -196.11 45.34 15635 �82 -1.1 17.72 1649.06 -1377.03 272.03 0 0 15685 17.59 -1.52 16.07 942.57 -202.96 39.61 15685 18.83 -1.1 17.73 1650.88 -1377.17 273.71 0 0 15725 17.66 -1.5 16.16 261.08 -221.29 39.79 15725 18.83 -0.98 17.85 1658.65 -1333.07 325.58 0 0 15775 17.67 -1.5 16.17 260.12 -210.67 49.45 15775 18.83 -0-98 17.85 1655.92 -1331.15 324.77 0 0 16110 17.03 -1.64 16.29 4003 -1-58 38.45 16110 18.97 -1.04 17.93 331.41 -273.13 58.28 0 0 16620 18.08 -1.61 16.47 92.39 -57 , 23 35.16 16620 19.1 -1.01 18.09 358.93 -266.22 92.71 0 0 16670 18.09 -1,61 16.48 39.28 -4.07 3521 16670 19.1 -1 18.1 41.88 -2.56 39.32 0 0 16739 18.12 -1-63 16A9 39.4 -4.19 35.21 16739 19-21 -1,01 18.2 42.16 -2.6 39.56 Notes: Each SECNO listed represents the 10- and 100-year storms, respectively. BASE represents the updated base model which includes survey sections to Sens Road. 4/5 PRO represents the proposed model which includes improvements up to SPRR. 0112012000 U) 0 z < Uj 0 0 x Water Surface Elevation and Top Width Comparison Updated Base Model vs Proposed Model (with Improvements to SPRR) SECNO Water Surface Elevation ft. Top Width (ft. BASE =j A PRO -BASE PRO BASE A PRO -BASE PRO 0 0 16789 18.13 J -1.63 16.5 105.74 i -70.5 35.24 16789 19.22 -1.01 18.21 397.65 -269.1 128.55 0 0 16821 18.13 -1.62 16.51 106.47 -71.22 35.25 16821 19.22 -1.01 18.21 400.54 -270.16 130.38 0 0 16855 18.12 -1.61 16.51 42.07 -17.91 24.16 16855 19.23 -1.04 18.19 2433.16 -2390.12 43.04 0 0 18094 18.67 -0.72 17.95 39.91 -9.44 30.47 18094 19.41 -0.27 19.14 2146.62 -1144.5 1002.12 0 0 18874 18.92 -0.52 18.4 36.5 -5.27 31.23 18874 19.65 -0.15 19.5 43.11 -1.25 41.86 C) 0 18934 18.94 -0.5 18.44 22.22 -0.2 22.02 18934 -19.68 -0.14 19.54 22.52 _0.06 22.46 0 0 18939 18.96 -0.5 18.46 20.3 0 20.3 18939 19.72 -0.15 19.57 741.91 -197.85 544,06 0 0 18963 18.96 -0.49 18.47 20.3 0 20.3 18963 19.74 -0.15 19.59 790 -179.6 610.4 1 Notes: Each SECNO listed represents the 10- and 1 00-year storms, respectively. BASE represents the updated base model which includes survey sections to Sens Road. PRO represents the proposed model which includes improvements up to SPRR. 5/5 01120/2000 Water Surface Elevation and Top Width Comparison Updated Base Model vs Proposed Model (with Improvements to Sens) SECNO Water Surface Elevation ft. Top Width (ft. BASE A PRO -BASE PRO BASE A PRO -BASE PRO 0 3.3 -0.02 3.28 137.22 -0-08 137.14 0 4.57 -0.03 4.54 1 141.35 -0.08 141.27 0 0 528 3.96 -0,02 3.94 154.08 -0126 153.82 1 528 5.22 -0,02 5.2 168.39 -0.28 168.11 0 0 1818 6.38 -0.03 6.35 126.57 -0.3 126.27 1818 7.65 -0.03 7.62 142.8 -0.32 142.48 0 0 1903 6.53 -0.02 6.51 102.46 -0.08 102,38 1903 7.82 -0.02 7.8 109,6 _0.15 109.45 0 0 1953 6.57 -0.03 6.54 102.58 -0.08 102.5 1953 7.87 -0.02 7.85 109.92 -0.16 109.76 0 0 1990 6.58 -0.02 6.56 102.62 -0.08 102,84 1990 7.89 -0.03 7.86 110.01 -0.15 109.86 0 0 2040 6.62 -0.03 6.59 102.74 -0.08 102.66 2040 7.94 -0M 7.91 110.31 -0.16 110.15 0 0 2910 7.2 -0-03 7.17 130.51 -0.28 130.23 2910 8.68 -0.03 8.65 144.55 -0.3 144.25 0 0 3660 8.11 -0.03 8.08 98.38 -1.15 97.23 3660 9.61 -0.03 9.58 143.32 -1.05 142.27 0 0 4240 8.88 -0.04 8.84 86.63 -0.31 86.32 4240 10.51 -0.04 10.47 189.43 -3.97 185.46 0 0 4778 9.97 -0.04 9.93 65.42 -0.3 65.12 4778 11-53 -0.04 11.49 268.39 -11.68 256.71 0 0 5555 11.23 -0.04 11.19 79.46 -0.26 7_92 5555 12.79 -0.03 1 12.76 1308.62 -16.42 1292.2 0 0 5616 11.27 -0.04 11.23 85.07 -0.24 84.83 6616 12.82 -0.03 12.79 1321.96 -15.45 1306.51 0 0 5828 11.31 -0.05 11.26 87.28 -025 87.03 5828 12.86 -0.03 12.83 1076.98 -14.47 1062.51 0 0 5864 11.31 -0.04 11.27 87.01 -0.25 86.76, 5864 12.86 -0.03 1 12.83 92 .0 92 0 0 5904 11.31 -0,04 11.27 86,47 -0.26 86.21 5904 12.86 -0.03 12.83 92 0 92 0 5940 11.32 -0.05 11.27 , 86,49 -0.26 86.23 Notes: Each SECNO listed represents the 10- and I 00-year storms, respei-tiveiy. BASE represents the updated base model which includes survey sections to Sens Road. PRO represents :he proposed mode{ which includes improvements up to Sens. 115 01/20/2000 l­_ z 0 C LL CL Water Surface Elevation and Top Width Comparison Updated Base Model vs Proposed Model (with Improvements to Sens} SECNO Water Surface Elevation (ft,) iop Width ft.) BASE A PRO -BASE PRO BASE A PRO -BASE PRO 5940 12.87 -0.03 12.84 1081.56 -14.41 1067.15 0 0 6151 11.34 -0.05 11.29 88.21 -0.27 87.94 6151 12.9 -0.03 12.87 1096.47 -14.89 1081.58 0 0 6274 11.35 -0.05 11.3 87.96 -0.27 87-.69 P274 6274 274 12.91 -0.03 12.88 542.15 -44.98 497,17 0 0 6 96 6696 11.41 -0.04 11.37 78,44 -0,25 78.19 6696 12.98 -0.03 12.95 388.96 -34M 354.33 0 0 6746 -0.04 11.42 99.29 -0.21 99.08 6746 .�46 13.05 -0.03 13.02 428.27 -30.91 397.36 0 0 6840 11.5 -0.05 11.45 99.18 -0,2 98.98 6840 13.15 -0.04 13.11 482.04 -28.02 454.02 0 0 6889 11.49 -0.05 11.44 78.73 -0.27 78.46 6889 13.13 -0.03 13.1 535.8 -56.38 479,42 0 0 6959 11.51 -M4 11.47 81.82 -0.28 81.54 _6959 13.16 -0,03 13.13 475.79 -18.24 457.55 0 0 7434 11.64 -0.04 11.6 77.4 -0.28 77.12 7434 13.3 -0.03 13.27 301.95 -8.35 293.6 0 0 7494 11.65 -0,04 11.61 64.14 -0.23 63.91 7494 13.31 -0.04 13.27 296.74 -9.02 287.72 0 0 7514 11.65 -0.04 11.61 5M 1 -0.21 57.9 7514 13.3 -0.03 13.27 281.94 -10.2 271.74 0 0 7534 11.65 -0.05 11.6 54.38 -0 . 19 54.19 7534 13.29 -0.03 13.26 274.88 -10.2 264.68 0 0 7899 11.7 -0.04 11.66 52.92 -0.19 52.73 7899 13,36 -0.03 13.33 65.12 -0.24 64.88 0 7947 11.76 -0.05 11.71 90.78 -2.6 88.18 7947 13.43 -0.04 13.39 304,21 -3.34 300.87 0 0 7992 12.16 -0.06 12.1 51 0 51 7992 14.43 -0.07 14.36 577.29 -22.39 554.9 0 0 8019 12.23 -0.05 12.18 137 0 137 8019 14.51 -0.07 14.44 298.78 -17.11 281.67 0 0 8254 12.3 -0.06 12.24 1 158.81 -3 . 06 155.75 Notes: Each SECNO listed represents the 10- and 100-year storms, respectively. BASE represents the updated base model which includes survey sections to Sens Road. PRO represents the proposed model which includes improvements up to Sens. 225 01/20!2000 Water Surface Elevation and Top Width Comparison Updated Base Model vs Proposed Model (with Improvements to Sens) SECNO Water Surface Elevation (ft.) To Width (ft. BASE A PRO -BASE PRO BASE PRO -BASE PRO 8254 14.7 -0.07 14.63 168.11 -0.27 167.84 0 8304 12.28 -0.06 12.22 129.23 -1.13 128.1 8304 14.68 -0.07 14.61 567.8 -33.6 534-2 0 0 8349 12.7 -0.08 12.62 79.83 4 -1.42 78.41 8349 15.79 -0,11 15.68 1048.78 -28.82 1019.96 0 0 8432 12.74 -0.07 12.67 142.36 -2.36 140 8432 15.8 -0.11 15.69 1052.08 -28.7 1023.38 8461 NA 12.66 NA 73.1 8461 NA 15.68 NA 1203.77 8712 12.9 _0.11 12.79 80.33 1 206.46 286.79 8712 15.86 -0,11 15.75 1303.81 -54.47 1249.34 1 0 0 10012 14.43 4,62 12.81 77.32 164.08 241A 10012 16.49 -0,73 15.76 177.98 83.98 261.96 10900 J NA 12.84 NA 214.12 10900 NA 15.78 NA 234.63 11124 NA 12.85 NA 132.95 11124 NA 15.78 NA 153.62 11174 15.18 -2.36 12.82 88.66 -41.57 47.09 11174 16.98 -1.22 15.76 624.37 -507.74 116.63 0 0 11327 15.28 -2.29 12.99 53.78 -6.63 47.15 11327 17.04 -1.22 15.82 125.6 -49.68 75.92 0 0 12098 15.91 -2.04 13.87 52.75 -9.96 42.79 12098 17.51 -1.29 16.22 473.29 -413.44 59.85 0 0 12198 15.96 -1.97 13.99 60.12 -15.26 44.86 12198 17.55 -1.27 16.28 525.57 -452.98 72.59 0 0 12248 15.98 -1.95 14.03 52.23 -7.32 44.91 12248 17.56 -1.25 16.31 365.4 -295.23 70.17 0 0 12280 16 -1.98 14.02 38.84 -10.92 27.92 12280 17.6 -1.31 16.29 92.53 -42.9 49.63 0 0 12382 16.01 -1.97 14.04 39.25 -11.27 27,98 12382 17.6 -1.3 16.3 92.79 -42.63 50.16 0 0 12414 16.07 -1.96 14.11 43.41 3.6 47.01 Notes: Each SECNO listed represents the 10- and 100-year storms, respectively. BASE represents the updated base model which includes survey sections to Sens Road. PRO represents the proposed model which includes improvements up to Sens. 3/5 01/20/2000 070 Water Surface Elevation and Top Width Comparison Updated Base Model vs Proposed Model (with Improvements to,,,Sens) SECNO Water Surface, Elevation (ft.) To Width (ft.) BASE A PRO -BASE PRO BASE 'I A PRO -BASE PRO 12414 17.62 -1.24 16.38 330.6 -269.99 60.61 0 0 12464 16.14 -1.98 1 14.16 71.48 -19.38 521 12464 17.71 -1.3 16.41 311.6 -236.64 74.96 0 0 12564 16.17 -1.97 14.2 56.72 -10.81 45.91 12564 17.72 -1.29 16.43 368.3 -303.46 64.84 0 0 13864 17.1 -2 15.1 37.54 9.82 47.36 13864 18.46 -1.46 17 70.96 -12.17 58.79 0 0 14246 17.29 -1.94 15.35 244.4 -203.31 41.09 14246 18.6 -1.42 17.18 2983.51 -2802.14 181.37 0 0 15321 17.48 -1.59 15.89 586.71 -505.23 81.48 15321 18.64 -1.14 17.5 3208.19 -2599.13 609.06 0 0 15371 17.49 -1.58 15.91 27 0 27 15371 18.64 -1.15 17.49 3212.01 -3184.84 27.17 0 0 15400 j 17.53 -1.59 15.94 27 0 27 15400 18.82 -1.21 17.61 3381.29 -3354.12 27.17 0 0 15450 17.56 -1,57 15.99 722.42 -634.88 87.54 15450 18.82 -1.14 17.68 3382.52 -2252.94 1129.58 0 0 15635 17.58 -1.52 16.06 241.45 -196.11 45.34 15635 18.82 -1.1 17.72 1649.06 -1377.03 272.03 0 -0 15685 17.59 -1.52 16.07 242.57 -202.96 39.61 15685 18.83 -1.1 17.73 1650.88 -1377.17 273.71 0 0 15725 17.66 -1.5 16.16 261.08 -221.29 39.79 15725 18.83 -0.98 17.85 1658.65 -1333.07 32K58 0 0 15775 17.67 -1.5 16.17 266.12 -210.67 49.45 15775 18.83 -0.98 17.85 1655.92 -1331.15 324.77 0 0 16110 17.93 -1.64 16.29 40.03 -1.58 38.45 16110 18,97 -1 .04 17.93 331.41 -273.13 58.28 0 0 16620 18.08 -1.61 16.47 92.39 -57,23 35.16 16620 19.1 -1.01 18.09 358.93 -266.22 92.71 0 0 16670 18.09 - 1.61 16.48 39.28 -4.07 35.21 16670 19.1 -1 18.1 41.88 -2.56 39.32 0 0 167397-r1812 -1.63 16.49 1 39A -4.19 35.21 16739 1 19.21 -1.01 18.2 42.16 -2.6 39.56 Notes: Each SECNO listed represents the 10- and 1007year storms, respectively. BASE represents the updated base model which includes survey sections to Sens Road. 4/5 PRO represents the proposed model which includes improvements up to Sens. 0V20/2000 0 0 z < LU 0 Q) ry, Water Surface Lievation and Top Width Comparison Updated Base Model vs Proposed Model (with Improvements to Sens) SECNO Water Surface Elevation (ft.) op Width (ft, BASE L PRO -BASE PRO BASE & PRO -BASE PRO 0 0 16789 1 18,13 -1.63 16.5 105.74 -70.5 35.24 16789 19.22 -1.01 18.21 397.65 -269.1 128.55 0 0 16821 18.13 j -1.62 16.51 106.47 -71.22 35.25 16821 19.22 -1.01 18.21 400.54 -270.16 130.38 0 0 16855 18.12 -1.62 16.5 42.07 -14.13 27.94 16855 19.23 -1.02 18.21 2433.18 -2358.21 74.95 0 0 18094 18.67 -1.16 '1 T51 39.91 -11.07 28.84 18094 19.41 -0.52 18.89 2146.62 -2101.35 45.27 0 0 18874 18.92 -0.97 17.95 36.5 -3.98 32.52 18874 19.65 -0.42 19.23 43.11 0.49 43,6 0 0 18934 18.94 -0.97 17.97 22,22 -0.39 21.83 18934 19.68 -0.43 19.25 22.52 -0.17 22.35 0 0 18939 18.96 -0.97 17.99 20.3 0 20.3 18939 19.72 -0.46 19,26 741.91 -620.97 120.94 0 0 18963 18.96 -0.96 18 20.3 0 20.3 18963 19.74 -0.46 19.28 790 -564.72 225.28_ Notes! Each SECNO listed represents the 10- and 100-yesr storms, respectively. BASE represents the updated base model which includes survey sections to Sens Road, 5/5 PRO represents the proposed model which includes Improvements up to Sens. 0 1 IM2000 U1 sk j/