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1 July 12, 2018 Attn: Matt Siekielski NexBank SSB 2515 McKinney Ave, Ste 1100 Dallas, Texas Re: Flood Reclamation Feasibility Study - Limited Mr. Siekielski, We have completed a limited flood reclamation study and review of your ~4-acre development located on the west side of the intersection of Marvin D Love Freeway and W. Pentagon Parkway, Dallas, Texas. Our investigation, process, and findings for this high level preliminary review of the feasibility of being able to reclaim a portion of the property that falls within the 100-year flood limits of Five Mile Creek is summarized as follows; Investigation and background information gathering consisted of an initial request from FEMA for all historical and current flood study information, models, and analysis on record for this section of Five Mile Creek. Additional research was conducted on the FEMA GIS and Data Management Systems web sites. There is only historical data available for this area so the ability to reproduce existing flood conditions, at this point, is limited. Our preliminary processes involved reviewing the information and data collected during the investigation period and then building an existing conditions model within, FEMA approved flood modeling software, the HEC-RAS software package. The engineer then built an assumed area of reclamation (area of fill) and modeled the new 100-year flood limits. A direct comparison of the pre and post Base Flood Elevations (BFE) was conducted. While there are many considerations given to the overall unity, continuity, behavior, and hydrology of the flood way system this study focused only on evaluating the feasibility of reclaiming lands (on the subject property stated above) within the current FEMA 100-year flood zone. The Engineer finds that the property s BFE lies within an elevation of 510 to 511, with it being plausible to reclaim a portion of the property by designing a grading scheme that would maintain this BFE. A portion of the eastern part of the property could be raised to a minimum elevation of 513 feet. While it is feasible to file and follow the FEMA process for gaining approval for reclaiming the land, it is a process that will require time and funding to complete. If you have any questions or require additional information, please feel free to contact me. Sincerely, Garrett D. Keller, P.E. Matkin-Hoover Engineering & Surveying Project Manager CIVIL ENGINEERS SURVEYORS LAND PLANNERS CONSTRUCTION MANAGERS CONSULTANTS MATKIN HOOVER ENGINEERING & SURVEYING 8 SPENCER ROAD, SUITE BOERNE, TEXAS OFFICE (830) FAX (830)

2 Date: Jul 12, 2018, 4:43pm User ID: tlung LEGEND PROPERTY BOUNDARY BASE FLOOD ELEVATION (B.F.E.) SCALE: 1"=30' AREA OF PLAUSIBLE LAND RECLAMATION CREEK CREST LINE 0 0' 50 EXISTING 1' CONTOUR A PORTION OF THIS TRACT LIES WITHIN FLOOD HAZARD AREA "AE" AS DELINEATED ON THE FEMA FLOOD INSURANCE RATE MAP PANEL NO C0480K, FOR DALLAS COUNTY, EFFECTIVE JULY 7, NOTES: 1. PROPERTY LINES SHOWN ARE APPROXIMATE AND DO NOT REPRESENT AN ON THE GROUND SURVEY OF THE PROPERTY'S BOUNDARY LINES. 49 0' REVISIONS: ' SITE PLAN IS CONCEPTUAL AND DOES NOT REPRESENT THE FINAL/APPROVED SITE IMPROVEMENTS. 3. B.F.E. AND FLOOD LIMITS ARE APPROXIMATE AND DO NOT REPRESENT A DETAILED FLOOD ANALYSIS STUDY. 4. GOVERNING AUTHORITY: FEMA, CITY OF DALLAS, TRINITY WATERSHED MANAGEMENT DEPARTMENT, FLOOD PLAIN AND ESCARPMENT ZONE REGULATIONS; ARTICLE V, DIVISION 51A ; FLOOD PLAIN REGULATIONS. 5. THE AREA OF SUGGESTED LAND RECLAMATION (~21,000 SQ-FT) IS APPROXIMATE AND DOES NOT REPRESENT THE ACTUAL AREA OF RECLAMATION. A DETAILED FLOOD RECLAMATION STUDY WOULD NEED TO BE CONDUCTED ON THIS PROPERTY PRIOR TO LAND RECLAMATION DETERMINATION. OP TY BO UN DA RY Y CR TL W PK ES ER INE PR OP ER TY B 8 SPENCER ROAD SUITE 100 BOERNE, TEXAS OFFICE: CONTACT@MATKINHOOVER.COM OU ND AR Y 5.1. FILLING IN THE FLOOD PLAIN: SEC. 51A SETBACK FROM NATURAL CHANNEL: A REQUIRED 20'-0" SETBACK FROM CREST LINE PLUS A 4:1 SLOPE UNTIL AN ELEVATION OF AT LEAST 2'-0" ABOVE B.F.E. (SEC. 51A ). 530 OVERBANK N = EX 510 E EL 67 Y E DA R AN EL AD RO 52 0' GE TY BO UN YF DA Y ER FW RY MA 540' RV IN DL OV E 530' 53 0' MA RV IN (U D L.S. OV 67 E F ) W OP RO N PR PL EX TA RY OP ' UN DA PR BO ER TY (U BO.S. UN AN E FIR PL E X TY Z:\PROJECTS\ Siekielski Multifamily - Dallas\Exhibits\FIG Reclamation Feasibility Study.dwg FIR EL ) AN E EXISTING PROPOSED Profile: 10yr Flow Discharge = 2,800 cfs 10yr = ft Profile: 10yr Flow Discharge = 2,800 cfs 10yr = ft Profile: 100yr Flow Discharge = 4,800 cfs 100yr = ft Profile: 100yr Flow Discharge = 4,800 cfs 100yr = ft DALLAS COUNTY, TEXAS FIR 4+00 SIEKIELSKI MF FEASIBILITY LA LINE CRES T EL AN E 2+00 FOR FLOOD RECLAMATION FEASIBILITY STUDY 490 FIR OP ER 10-YR B.F.E. FOR REVIEW ONLY - NOT FOR CONSTRUCTION NE 12 FIR E AN EXISTING GROUND ' EL FIR INE TL ES CR PL 100-YR B.F.E. ' PR OVERBANK N = PROPOSED GROUND CHANNEL N = TEXAS REGISTERED ENGINEERING FIRM F SURVEYING FIRM F PR 3303 SHELL ROAD SUITE 100 GEORGETOWN, TEXAS OFFICE: INE ON AG NT PE 510' TL ENGINEERING & SURVEYING ES W CR B.F.E ' 60' This document is released for REVIEW PURPOSES ONLY, NOT FOR CONSTRUCTION and was prepared under the authorization of Garrett D. Keller, Registered Professional Engineer, State of Texas, Registration No DATE: March, ' EXISTING 5' CONTOUR 15' 30' 45' SHEET SIZE: 24" x 36" FIG JOB NO. DESIGNED BY: T. LUNG P.T.COLLINS LUNG DRAWN BY: CHECKED BY: G. KELLER

3 V FLOODSTUDY PREDEV.RPT HEC RAS Version Jan 2010 U.S. Army Corps of Engineers Hydrologic Engineering Center 609 Second Street Davis, California X X XXXXXX XXXX XXXX XX XXXX X X X X X X X X X X X X X X X X X X X XXXXXXX XXXX X XXXX XXXX XXXXXX XXXX X X X X X X X X X X X X X X X X X X X X X XXXXXX XXXX X X X X XXXXX PROJECT DATA Project Title : Project File : V FLOODSTUDY PREDEV.PRJ Run Date and Time : 07/11/18 03:31:49 PM Project in English units PLAN DATA Plan Summary Information: Number of: Cross Sections = 13 Multiple Openings = 0 Culverts = 0 Bridges = 0 Computational Information Water surface calculation tolerance = 0.01 Critical depth calculation tolerance = 0.01 Maximum number of iterations = 20 Maximum difference tolerance = 0.3 Flow tolerance factor = Computational Flow Regime: Subcritical Flow Encroachment Data: None FLOW DATA Flow Data (cfs) Page 1

4 V FLOODSTUDY PREDEV.RPT River Reach Riv Sta 10yr 100yr Fivemi Boundary Conditions River Reach Profile Upstream Downstream Fivemi 1 10yr Critical Depth Fivemi 1 100yr Critical Depth CROSS SECTION RIVER: Fivemi REACH: 1 River Station: 13 INPUT Description: Station Elevation Data, num = 90 Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev Page 2

5 V FLOODSTUDY PREDEV.RPT Manning's n Values, num = 3 Sta. Value Sta. Value Sta. Value Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan CROSS SECTION OUTPUT Profile # 10yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.10 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 2.50 Avg. Vel. (ft/s) 2.50 Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) 0.13 Alpha 1.00 Stream Power (lb/ft s) Frctn Loss (ft) 0.07 Cum Volume (acre ft) C & E Loss (ft) 0.00 Cum SA (acres) CROSS SECTION OUTPUT Profile # 100yr Page 3

6 V FLOODSTUDY PREDEV.RPT E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.21 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 3.66 Avg. Vel. (ft/s) 3.66 Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) 0.27 Alpha 1.00 Stream Power (lb/ft s) Frctn Loss (ft) 0.12 Cum Volume (acre ft) C & E Loss (ft) 0.00 Cum SA (acres) CROSS SECTION RIVER: Fivemi REACH: 1 River Station: 12 INPUT Description: Station Elevation Data, num = 90 Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev Page 4

7 V FLOODSTUDY PREDEV.RPT Manning's n Values, num = 3 Sta. Value Sta. Value Sta. Value Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan CROSS SECTION OUTPUT Profile # 10yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.09 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 2.45 Avg. Vel. (ft/s) 2.45 Max Chl Dpth (ft) Hydr. Depth (ft) 9.63 Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) 0.13 Alpha 1.00 Stream Power (lb/ft s) Frctn Loss (ft) 0.08 Cum Volume (acre ft) Page 5

8 V FLOODSTUDY PREDEV.RPT 1.83 C & E Loss (ft) 0.00 Cum SA (acres) CROSS SECTION OUTPUT Profile # 100yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.19 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 3.51 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.01 Stream Power (lb/ft s) Frctn Loss (ft) 0.13 Cum Volume (acre ft) C & E Loss (ft) 0.01 Cum SA (acres) Warning: Divided flow computed for this cross section. CROSS SECTION RIVER: Fivemi REACH: 1 River Station: 11 INPUT Description: Page 6

9 V FLOODSTUDY PREDEV.RPT Station Elevation Data, num = 90 Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev Manning's n Values, num = 3 Sta. Value Sta. Value Sta. Value Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan CROSS SECTION OUTPUT Profile # 10yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.08 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 2.28 Avg. Vel. (ft/s) 2.28 Max Chl Dpth (ft) Hydr. Depth (ft) 8.36 Page 7

10 V FLOODSTUDY PREDEV.RPT Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) 0.12 Alpha 1.00 Stream Power (lb/ft s) Frctn Loss (ft) 0.03 Cum Volume (acre ft) C & E Loss (ft) 0.01 Cum SA (acres) Warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. CROSS SECTION OUTPUT Profile # 100yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.16 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 3.11 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.06 Stream Power (lb/ft s) Frctn Loss (ft) 0.06 Cum Volume (acre ft) Page 8

11 V FLOODSTUDY PREDEV.RPT C & E Loss (ft) 0.03 Cum SA (acres) Warning: Divided flow computed for this cross section. Warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. CROSS SECTION RIVER: Fivemi REACH: 1 River Station: 10 INPUT Description: Station Elevation Data, num = 90 Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev Manning's n Values, num = 3 Sta. Value Sta. Value Sta. Value Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan CROSS SECTION OUTPUT Profile # 10yr Page 9

12 V FLOODSTUDY PREDEV.RPT E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.03 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 1.44 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.05 Stream Power (lb/ft s) Frctn Loss (ft) 0.02 Cum Volume (acre ft) C & E Loss (ft) 0.00 Cum SA (acres) Warning: Divided flow computed for this cross section. CROSS SECTION OUTPUT Profile # 100yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.07 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Page 10

13 V FLOODSTUDY PREDEV.RPT Vel Total (ft/s) 1.98 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.22 Stream Power (lb/ft s) Frctn Loss (ft) 0.03 Cum Volume (acre ft) C & E Loss (ft) 0.01 Cum SA (acres) CROSS SECTION RIVER: Fivemi REACH: 1 River Station: 9 INPUT Description: Station Elevation Data, num = 90 Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev Manning's n Values, num = 3 Sta. Value Sta. Value Sta. Value Page 11

14 V FLOODSTUDY PREDEV.RPT Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan CROSS SECTION OUTPUT Profile # 10yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.04 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 1.55 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.12 Stream Power (lb/ft s) Frctn Loss (ft) 0.03 Cum Volume (acre ft) C & E Loss (ft) 0.03 Cum SA (acres) Warning: Divided flow computed for this cross section. Warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. CROSS SECTION OUTPUT Profile # 100yr Page 12

15 V FLOODSTUDY PREDEV.RPT E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.09 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 2.07 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.34 Stream Power (lb/ft s) Frctn Loss (ft) 0.05 Cum Volume (acre ft) C & E Loss (ft) 0.04 Cum SA (acres) Warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. CROSS SECTION RIVER: Fivemi REACH: 1 River Station: 8 INPUT Description: Station Elevation Data, num = 90 Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev Page 13

16 V FLOODSTUDY PREDEV.RPT Manning's n Values, num = 3 Sta. Value Sta. Value Sta. Value Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan CROSS SECTION OUTPUT Profile # 10yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.10 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 2.20 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Page 14

17 V FLOODSTUDY PREDEV.RPT Alpha 1.33 Stream Power (lb/ft s) Frctn Loss (ft) 0.03 Cum Volume (acre ft) C & E Loss (ft) 0.05 Cum SA (acres) Warning: Divided flow computed for this cross section. Warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. CROSS SECTION OUTPUT Profile # 100yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.16 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 2.20 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 2.17 Stream Power (lb/ft s) Frctn Loss (ft) 0.05 Cum Volume (acre ft) C & E Loss (ft) 0.08 Cum SA (acres) Warning: The conveyance ratio (upstream conveyance divided by downstream Page 15

18 V FLOODSTUDY PREDEV.RPT conveyance) is less than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. CROSS SECTION RIVER: Fivemi REACH: 1 River Station: 7 INPUT Description: Station Elevation Data, num = 90 Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev Manning's n Values, num = 3 Sta. Value Sta. Value Sta. Value Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan CROSS SECTION OUTPUT Profile # 10yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.04 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) Page 16

19 V FLOODSTUDY PREDEV.RPT E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 1.09 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 2.27 Stream Power (lb/ft s) Frctn Loss (ft) 0.01 Cum Volume (acre ft) C & E Loss (ft) 0.00 Cum SA (acres) Warning: The cross section end points had to be extended vertically for the computed water surface. CROSS SECTION OUTPUT Profile # 100yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.06 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 1.26 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Page 17

20 V FLOODSTUDY PREDEV.RPT Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 2.55 Stream Power (lb/ft s) Frctn Loss (ft) 0.02 Cum Volume (acre ft) C & E Loss (ft) 0.02 Cum SA (acres) Warning: The cross section end points had to be extended vertically for the computed water surface. CROSS SECTION RIVER: Fivemi REACH: 1 River Station: 6 INPUT Description: Station Elevation Data, num = 90 Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev Manning's n Values, num = 3 Sta. Value Sta. Value Sta. Value Page 18

21 V FLOODSTUDY PREDEV.RPT Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan CROSS SECTION OUTPUT Profile # 10yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.04 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 1.57 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.11 Stream Power (lb/ft s) Frctn Loss (ft) 0.01 Cum Volume (acre ft) C & E Loss (ft) 0.00 Cum SA (acres) CROSS SECTION OUTPUT Profile # 100yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.10 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) Page 19

22 V FLOODSTUDY PREDEV.RPT E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 2.28 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.18 Stream Power (lb/ft s) Frctn Loss (ft) 0.01 Cum Volume (acre ft) C & E Loss (ft) 0.00 Cum SA (acres) CROSS SECTION RIVER: Fivemi REACH: 1 River Station: 5 INPUT Description: Station Elevation Data, num = 90 Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev Page 20

23 V FLOODSTUDY PREDEV.RPT Manning's n Values, num = 3 Sta. Value Sta. Value Sta. Value Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan CROSS SECTION OUTPUT Profile # 10yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.04 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 1.66 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.04 Stream Power (lb/ft s) Frctn Loss (ft) 0.00 Cum Volume (acre ft) C & E Loss (ft) 0.00 Cum SA (acres) Warning: Divided flow computed for this cross section. CROSS SECTION OUTPUT Profile # 100yr Page 21

24 V FLOODSTUDY PREDEV.RPT E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.10 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 2.39 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.13 Stream Power (lb/ft s) Frctn Loss (ft) 0.01 Cum Volume (acre ft) C & E Loss (ft) 0.01 Cum SA (acres) CROSS SECTION RIVER: Fivemi REACH: 1 River Station: 4 INPUT Description: Station Elevation Data, num = 90 Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev Page 22

25 V FLOODSTUDY PREDEV.RPT Manning's n Values, num = 3 Sta. Value Sta. Value Sta. Value Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan CROSS SECTION OUTPUT Profile # 10yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.03 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 1.43 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.01 Stream Power (lb/ft s) Page 23

26 V FLOODSTUDY PREDEV.RPT Frctn Loss (ft) 0.01 Cum Volume (acre ft) C & E Loss (ft) 0.00 Cum SA (acres) Warning: Divided flow computed for this cross section. CROSS SECTION OUTPUT Profile # 100yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.07 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 1.80 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.40 Stream Power (lb/ft s) Frctn Loss (ft) 0.03 Cum Volume (acre ft) C & E Loss (ft) 0.01 Cum SA (acres) Warning: Divided flow computed for this cross section. CROSS SECTION RIVER: Fivemi REACH: 1 River Station: 3 Page 24

27 V FLOODSTUDY PREDEV.RPT INPUT Description: Station Elevation Data, num = 90 Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev Manning's n Values, num = 3 Sta. Value Sta. Value Sta. Value Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan CROSS SECTION OUTPUT Profile # 10yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.04 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Page 25

28 V FLOODSTUDY PREDEV.RPT Vel Total (ft/s) 1.39 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.21 Stream Power (lb/ft s) Frctn Loss (ft) 0.07 Cum Volume (acre ft) C & E Loss (ft) 0.14 Cum SA (acres) Warning: The velocity head has changed by more than 0.5 ft (0.15 m). This may indicate the need for additional cross sections. Warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. CROSS SECTION OUTPUT Profile # 100yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.08 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 1.95 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Page 26

29 V FLOODSTUDY PREDEV.RPT 0.02 Alpha 1.39 Stream Power (lb/ft s) Frctn Loss (ft) 0.12 Cum Volume (acre ft) C & E Loss (ft) 0.12 Cum SA (acres) Warning: Divided flow computed for this cross section. Warning: The velocity head has changed by more than 0.5 ft (0.15 m). This may indicate the need for additional cross sections. CROSS SECTION RIVER: Fivemi REACH: 1 River Station: 2 INPUT Description: Station Elevation Data, num = 90 Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev Manning's n Values, num = 3 Sta. Value Sta. Value Sta. Value Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan Page 27

30 V FLOODSTUDY PREDEV.RPT CROSS SECTION OUTPUT Profile # 10yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 1.48 Wt. n Val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 9.75 Avg. Vel. (ft/s) Max Chl Dpth (ft) 6.71 Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.00 Stream Power (lb/ft s) Frctn Loss (ft) 4.34 Cum Volume (acre ft) C & E Loss (ft) 0.00 Cum SA (acres) Warning: The energy equation could not be balanced within the specified number of iterations. The program used critical depth for the water surface and continued on with the calculations. Warning: The energy loss was greater than 1.0 ft (0.3 m). between the current and previous cross section. This may indicate the need for additional cross sections. CROSS SECTION OUTPUT Profile # 100yr E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 1.33 Wt. n Val Page 28

31 V FLOODSTUDY PREDEV.RPT W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 7.29 Avg. Vel. (ft/s) Max Chl Dpth (ft) 8.42 Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.61 Stream Power (lb/ft s) Frctn Loss (ft) 3.13 Cum Volume (acre ft) C & E Loss (ft) 0.07 Cum SA (acres) Warning: The energy equation could not be balanced within the specified number of iterations. The program used critical depth for the water surface and continued on with the calculations. Warning: Divided flow computed for this cross section. CROSS SECTION RIVER: Fivemi REACH: 1 River Station: 1 INPUT Description: Station Elevation Data, num = 90 Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev. Sta. Elev Page 29