PRELIMINARY CULVERT ANALYSIS REPORT FOR CULVERT NO. 008-C OREGON AVENUE OVER PINEHURST CREEK

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PRELIMINARY CULVERT ANALYSIS REPORT FOR CULVERT NO. 008-C OREGON AVENUE OVER PINEHURST CREEK Prepared for The District of Columbia Department of Transportation Washington, D.C. Prepared by Parsons Transportation Group 100 M Street, SE Washington, DC SEPTEMBER 2010

TABLE OF CONTENTS 1.0 LOCATION MAP... 3 2.0 DESCRIPTION... 4 3.0 DESIGN STANDARDS AND CRITERIA... 4 4.0 EXISTING CONDITONS... 5 5.0 PROPOSED CONDITIONS... 5 6.0 HY 8 CULVERT ANALYSIS REPORT... 6 7.0 PHOTOS... 44 2

1.0 LOCATION MAP 3

2.0 DESCRIPTION The existing Oregon Avenue Project is bounded by Military Road on the South and Western Avenue on the North. The existing culvert consists of singular rectangular concrete barrel of varying in size over Pinehurst Creek with two lanes of traffic. This structure is nearly 34 long and 14 6 x 4 6 at inlet and 14 10 x 5 7 at outlet as per inspection report prepared by Wilbur Smith Associates, Falls Church, VA dated 07/18/03. The purpose of this report is to analyze the existing conditions of the culvert and check the adequacy. This report will identify the existing culvert issues and provide a basis for future improvement. 3.0 DESIGN STANDARDS AND CRITERIA The existing culvert is analyzed in accordance with Chapter 23 and 33 of the District of Columbia Department of Transportation (DDOT) Design and Engineering Manual and the Federal Emergency Management Agency (FEMA), District of Columbia Washington DC. The culvert is in floodplain and analyzed using 50 year storm draining to low point in sag. In compliance with the National Flood Insurance Program (NFIP) it is necessary to consider 100 year frequency flood at all locations where construction will encroach on a floodplain. The NFIP prohibits any construction in floodplains, when combined with all other existing and anticipated uses, which would increase the water surface elevation of 100 year flood more than one foot at any given point. This does not necessarily require that the culvert be sized to pass the 100 year flood, provided the capacity of the culvert plus flow bypassing the culvert is sufficient to accommodate the 100 year flood without raising the water surface elevation excessively. Following are the summary of data for Pinehurst Run upstream of Oregon Avenue from Flood Insurance Study, Federal Emergency Management Agency, District of Columbia Washington DC dated August 16, 2007. Drainage Area (sqmi) 0.75 10 year flood (cfs) 1120 50 year flood (cfs) 1580 100-year flood (cfs) 1805 500 year flood (cfs) 2425 50 year elevation (ft) 100 year elevation (ft) 210.50 (From Flood Profile) 210.60 (From Flood Profile) 4

4.0 EXISTING CONDITONS Existing culvert (size 14 6 X 4 6 ) is analyzed, considering 3.5 height parapet wall above the culvert, by using HY 8 and results are provided in end of this this report. From table 1, headwater elevation for design discharge (1580 cfs) is 209.71 ft, discharge through culvert is 777.46 cfs and roadway discharge is 801.96 cfs. Headwater elevation for 100 year flood (1805 cfs) is 209.93 ft which is less than 210.60 ft. It is observed that there is significant scouring on downstream of the culvert and outlet velocity is 15.76 ft/s for design discharge from table 2. Existing culvert has supercritical flow and function under inlet control. 5.0 PROPOSED CONDITIONS A triple barrel box culvert in different conditions and size with same length and parapet wall is recommended and analyses are provided on this report. It is assumed that road surface will be raised by 1.5 in proposed condition. From table 4, the headwater elevation for design discharge (1580 cfs) is 208.38 ft, discharge through culvert is 1580.00 cfs and roadway discharge is 0.00 cfs. It shows that 50 year flood passes through culvert without overtopping road. Headwater elevation for 100 year flood (1805 cfs) is 209.35 ft which is less than 210.60 ft. A class II dry Riprap mat (L=30, W=60 & T=36 ) is recommended for downstream protection of the culvert because outlet velocity is 16.96 ft/s for design discharge from table 5. Proposed culvert will have supercritical flow and will be functioning under inlet control. 5

6.0 HY 8 CULVERT ANALYSIS REPORT 6

Table 1 - Summary of Culvert Flows at Crossing: Exist Culvert Headwater Elevation (ft) Total Discharge (cfs) Exist-1 Discharge (cfs) Roadway Discharge (cfs) Iterations 200.70 0.00 0.00 0.00 1 203.53 180.50 180.50 0.00 1 205.20 361.00 361.00 0.00 1 206.88 541.50 541.50 0.00 1 208.24 722.00 665.05 56.62 7 208.74 902.50 705.15 197.22 6 209.07 1083.00 730.34 352.34 5 209.33 1263.50 750.02 513.13 5 209.56 1444.00 766.56 677.06 5 209.71 1580.00 777.56 802.10 5 209.94 1805.00 793.58 1010.60 4 207.64 613.17 613.17 0.00 Overtopping 7

Rating Curve Plot for Crossing: Exist Culvert 8

Table 2 - Culvert Summary Table: Exist-1 Total Discharge (cfs) Culvert Discharge (cfs) Headwater Elevation (ft) Inlet Control Depth (ft) Outlet Control Depth (ft) Flow Type Normal Depth (ft) Critical Depth (ft) Outlet Depth (ft) Tailwater Depth (ft) Outlet Velocity (ft/s) Tailwater Velocity (ft/s) 0.00 0.00 200.70 0.000 0.0* 0-NF 0.000 0.000 0.000 0.000 0.000 0.000 180.50 180.50 203.53 2.830 0.0* 1-S2n 0.831 1.692 1.123 0.868 11.085 3.989 361.00 361.00 205.20 4.499 0.0* 1-S2n 1.300 2.686 1.906 1.267 13.064 5.130 541.50 541.50 206.88 6.177 0.0* 5-S2n 1.690 3.519 2.592 1.580 14.406 5.918 722.00 665.05 208.24 7.542 0.0* 5-S2n 1.936 4.036 3.026 1.847 15.156 6.536 902.50 705.15 208.74 8.039 0.0* 5-S2n 2.010 4.197 3.163 2.083 15.376 7.050 1083.00 730.34 209.07 8.366 0.0* 5-S2n 2.057 4.296 3.246 2.297 15.516 7.493 1263.50 750.02 209.33 8.630 0.0* 5-S2n 2.094 4.373 3.313 2.494 15.613 7.884 1444.00 766.56 209.56 8.858 0.0* 5-S2n 2.125 4.437 3.367 2.678 15.701 8.236 1580.00 777.56 209.71 9.012 0.109 5-S2n 2.145 4.479 3.403 2.809 15.756 8.479 1805.00 793.58 209.94 9.241 0.313 5-S2n 2.175 4.541 3.456 3.013 15.837 8.849 9

* theoretical depth is impractical. Depth reported is corrected. ******************************************************************************** Inlet Elevation (invert): 200.70 ft, Outlet Elevation (invert): 200.00 ft Culvert Length: 34.01 ft, Culvert Slope: 0.0206 ******************************************************************************** 10

Culvert Performance Curve Plot: Exist-1 11

Water Surface Profile Plot for Culvert: Exist-1 Site Data - Exist-1 Site Data Option: Culvert Invert Data Inlet Station: 10.00 ft Inlet Elevation: 200.70 ft Outlet Station: 44.00 ft Outlet Elevation: 200.00 ft Number of Barrels: 1 Culvert Data Summary - Exist-1 Barrel Shape: Concrete Box Barrel Span: 14.50 ft Barrel Rise: 4.60 ft Barrel Material: Concrete Embedment: 0.00 in Barrel Manning's n: 0.0120 Inlet Type: Conventional Inlet Edge Condition: Square Edge (90º) Headwall 12

Inlet Depression: None 13

Table 3 - Downstream Channel Rating Curve (Crossing: Exist Culvert) Flow (cfs) Water Surface Elev (ft) Depth (ft) Velocity (ft/s) Shear (psf) Froude Number 0.00 198.00 0.00 0.00 0.00 0.00 180.50 198.87 0.87 3.99 0.87 0.81 361.00 199.27 1.27 5.13 1.27 0.87 541.50 199.58 1.58 5.92 1.58 0.91 722.00 199.85 1.85 6.54 1.84 0.94 902.50 200.08 2.08 7.05 2.08 0.96 1083.00 200.30 2.30 7.49 2.29 0.97 1263.50 200.49 2.49 7.88 2.49 0.99 1444.00 200.68 2.68 8.24 2.67 1.00 1580.00 200.81 2.81 8.48 2.80 1.01 1805.00 201.01 3.01 8.85 3.01 1.02 Tailwater Channel Data - Exist Culvert Tailwater Channel Option: Irregular Channel Channel Slope: 0.0160 User Defined Channel Cross-Section: Coord No. Station (ft) Elevation (ft) Manning's n 1 0.00 210.00 0.0350 2 100.00 206.00 0.0350 3 160.00 198.00 0.0400 4 210.00 198.10 0.0400 5 230.00 202.00 0.0350 6 340.00 211.50 0.0350 7 360.00 212.00 0.0000 Roadway Data for Crossing: Exist Culvert Roadway Profile Shape: Irregular Roadway Shape (coordinates) 14

Irregular Roadway Cross-Section: Coord No. Station (ft) Elevation (ft) 1 0.00 213.37 2 100.00 208.81 3 150.00 207.64 4 162.00 207.64 5 162.00 211.14 6 188.00 211.18 7 188.00 207.68 8 200.00 207.68 9 300.00 209.92 10 400.00 214.56 Roadway Surface: Paved Roadway Top Width: 32.00 ft 15

Crossing Front View (Roadway Profile): Exist Culvert 50 Yr HW Parapet wall Exist Culvert Road Profile 16

Table 4 - Flows at Crossing: Prop Culvert-1 Headwater Elevation (ft) Total Discharge (cfs) Prop- No Overtopping Discharge (cfs) Roadway Discharge (cfs) Iterations 200.70 0.00 0.00 0.00 1 202.46 180.50 180.50 0.00 1 203.48 361.00 361.00 0.00 1 204.33 541.50 541.50 0.00 1 205.08 722.00 722.00 0.00 1 205.78 902.50 902.50 0.00 1 206.46 1083.00 1083.00 0.00 1 207.14 1263.50 1263.50 0.00 1 207.83 1444.00 1444.00 0.00 1 208.38 1580.00 1580.00 0.00 1 209.35 1805.00 1803.80 1.21 3 209.20 1769.65 1769.65 0.00 Overtopping 17

Rating Curve Plot for Crossing: Prop Culvert-1 18

Table 5 - Culvert Summary Table: Prop- No Overtopping Total Discharge (cfs) Culvert Discharge (cfs) Headwater Elevation (ft) Inlet Control Depth (ft) Outlet Control Depth (ft) Flow Type Normal Depth (ft) Critical Depth (ft) Outlet Depth (ft) Tailwater Depth (ft) Outlet Velocity (ft/s) Tailwater Velocity (ft/s) 0.00 0.00 200.70 0.000 0.0* 0-NF 0.000 0.000 0.000 0.000 0.000 0.000 180.50 180.50 202.46 1.758 0.0* 1-S2n 0.520 1.042 0.635 0.868 9.475 3.989 361.00 361.00 203.48 2.783 0.0* 1-S2n 0.824 1.654 1.081 1.267 11.130 5.130 541.50 541.50 204.33 3.628 0.0* 1-S2n 1.088 2.168 1.475 1.580 12.241 5.918 722.00 722.00 205.08 4.383 0.0* 1-S2n 1.319 2.626 1.836 1.847 13.110 6.536 902.50 902.50 205.78 5.084 0.0* 1-S2n 1.526 3.047 2.177 2.083 13.819 7.050 1083.00 1083.00 206.46 5.759 0.0* 1-S2n 1.732 3.441 2.501 2.297 14.436 7.493 1263.50 1263.50 207.14 6.435 0.0* 5-S2n 1.921 3.813 2.813 2.494 14.972 7.884 1444.00 1444.00 207.83 7.132 0.0* 5-S2n 2.101 4.168 3.111 2.678 15.471 8.236 1580.00 1580.00 208.38 7.683 0.109 5-S2n 2.237 4.426 3.330 2.809 15.816 8.479 1805.00 1803.80 209.35 8.654 0.313 5-S2n 2.455 4.835 3.680 3.013 16.341 8.849 19

* theoretical depth is impractical. Depth reported is corrected. ******************************************************************************** Inlet Elevation (invert): 200.70 ft, Outlet Elevation (invert): 199.90 ft Culvert Length: 40.01 ft, Culvert Slope: 0.0200 ******************************************************************************** 20

Culvert Performance Curve Plot: Prop- No Overtopping 21

Water Surface Profile Plot for Culvert: Prop- No Overtopping Site Data - Prop- No Overtopping Site Data Option: Culvert Invert Data Inlet Station: 10.00 ft Inlet Elevation: 200.70 ft Outlet Station: 50.00 ft Outlet Elevation: 199.90 ft Number of Barrels: 3 Culvert Data Summary - Prop- No Overtopping Barrel Shape: Concrete Box Barrel Span: 10.00 ft Barrel Rise: 6.00 ft Barrel Material: Concrete Embedment: 0.00 in Barrel Manning's n: 0.0120 Inlet Type: Conventional Inlet Edge Condition: Square Edge (90º) Headwall Inlet Depression: None 22

Table 6 - Downstream Channel Rating Curve (Crossing: Prop Culvert-1) Flow (cfs) Water Surface Elev (ft) Depth (ft) Velocity (ft/s) Shear (psf) Froude Number 0.00 198.00 0.00 0.00 0.00 0.00 180.50 198.87 0.87 3.99 0.87 0.81 361.00 199.27 1.27 5.13 1.27 0.87 541.50 199.58 1.58 5.92 1.58 0.91 722.00 199.85 1.85 6.54 1.84 0.94 902.50 200.08 2.08 7.05 2.08 0.96 1083.00 200.30 2.30 7.49 2.29 0.97 1263.50 200.49 2.49 7.88 2.49 0.99 1444.00 200.68 2.68 8.24 2.67 1.00 1580.00 200.81 2.81 8.48 2.80 1.01 1805.00 201.01 3.01 8.85 3.01 1.02 Tailwater Channel Data - Prop Culvert-1 Tailwater Channel Option: Irregular Channel Channel Slope: 0.0160 User Defined Channel Cross-Section: Coord No. Station (ft) Elevation (ft) Manning's n 1 0.00 210.00 0.0350 2 100.00 206.00 0.0350 3 160.00 198.00 0.0400 4 210.00 198.10 0.0400 5 230.00 202.00 0.0350 6 340.00 211.50 0.0350 7 360.00 212.00 0.0000 Roadway Data for Crossing: Prop Culvert-1 Roadway Profile Shape: Irregular Roadway Shape (coordinates) 23

Irregular Roadway Cross-Section: Coord No. Station (ft) Elevation (ft) 1 0.00 213.37 2 100.00 209.70 3 150.00 209.30 4 159.00 209.20 5 159.00 211.20 6 191.00 211.20 7 191.00 209.25 8 200.00 209.40 9 300.00 210.50 10 400.00 214.56 Roadway Surface: Paved Roadway Top Width: 36.00 ft 24

Crossing Front View (Roadway Profile): Prop Culvert-1 25

Table 7 - Summary of Culvert Flows at Crossing: Prop Culvert-2 Headwater Elevation (ft) Total Discharge (cfs) Prop-No increse in HW Elev Discharge (cfs) Roadway Discharge (cfs) Iterations 200.70 0.00 0.00 0.00 1 202.58 180.50 180.50 0.00 1 203.68 361.00 361.00 0.00 1 204.59 541.50 541.50 0.00 1 205.40 722.00 722.00 0.00 1 206.16 902.50 902.50 0.00 1 206.91 1083.00 1083.00 0.00 1 207.67 1263.50 1263.50 0.00 1 208.48 1444.00 1444.00 0.00 1 209.14 1580.00 1580.00 0.00 1 209.89 1805.00 1726.15 78.73 5 209.20 1592.66 1592.66 0.00 Overtopping 26

Rating Curve Plot for Crossing: Prop Culvert-2 27

Table 8 - Culvert Summary Table: Prop-No increse in HW Elev Total Discharge (cfs) Culvert Discharge (cfs) Headwater Elevation (ft) Inlet Control Depth (ft) Outlet Control Depth (ft) Flow Type Normal Depth (ft) Critical Depth (ft) Outlet Depth (ft) Tailwater Depth (ft) Outlet Velocity (ft/s) Tailwater Velocity (ft/s) 0.00 0.00 200.70 0.000 0.0* 0-NF 0.000 0.000 0.000 0.000 0.000 0.000 180.50 180.50 202.58 1.882 0.0* 1-S2n 0.582 1.118 0.691 0.868 9.677 3.989 361.00 361.00 203.68 2.982 0.0* 1-S2n 0.890 1.774 1.173 1.267 11.394 5.130 541.50 541.50 204.59 3.887 0.0* 1-S2n 1.189 2.325 1.602 1.580 12.517 5.918 722.00 722.00 205.40 4.699 0.0* 1-S2n 1.426 2.817 1.996 1.847 13.398 6.536 902.50 902.50 206.16 5.461 0.0* 1-S2n 1.662 3.269 2.367 2.083 14.124 7.050 1083.00 1083.00 206.91 6.208 0.0* 5-S2n 1.885 3.691 2.718 2.297 14.757 7.493 1263.50 1263.50 207.67 6.975 0.0* 5-S2n 2.092 4.091 3.054 2.494 15.325 7.884 1444.00 1444.00 208.48 7.785 0.0* 5-S2n 2.298 4.471 3.378 2.678 15.830 8.236 1580.00 1580.00 209.14 8.437 0.109 5-S2n 2.450 4.748 3.615 2.809 16.188 8.479 1805.00 1726.15 209.89 9.187 0.313 5-S2n 2.603 5.036 3.863 3.013 16.548 8.849 28

* theoretical depth is impractical. Depth reported is corrected. ******************************************************************************** Inlet Elevation (invert): 200.70 ft, Outlet Elevation (invert): 199.90 ft Culvert Length: 40.01 ft, Culvert Slope: 0.0200 ******************************************************************************** 29

Culvert Performance Curve Plot: Prop-No increse in HW Elev 30

Water Surface Profile Plot for Culvert: Prop-No increse in HW Elev Site Data - Prop-No increse in HW Elev Site Data Option: Culvert Invert Data Inlet Station: 10.00 ft Inlet Elevation: 200.70 ft Outlet Station: 50.00 ft Outlet Elevation: 199.90 ft Number of Barrels: 3 Culvert Data Summary - Prop-No increse in HW Elev Barrel Shape: Concrete Box Barrel Span: 9.00 ft Barrel Rise: 6.00 ft Barrel Material: Concrete Embedment: 0.00 in Barrel Manning's n: 0.0120 Inlet Type: Conventional Inlet Edge Condition: Square Edge (90º) Headwall Inlet Depression: None 31

Table 9 - Downstream Channel Rating Curve (Crossing: Prop Culvert-2) Flow (cfs) Water Surface Elev (ft) Depth (ft) Velocity (ft/s) Shear (psf) Froude Number 0.00 198.00 0.00 0.00 0.00 0.00 180.50 198.87 0.87 3.99 0.87 0.81 361.00 199.27 1.27 5.13 1.27 0.87 541.50 199.58 1.58 5.92 1.58 0.91 722.00 199.85 1.85 6.54 1.84 0.94 902.50 200.08 2.08 7.05 2.08 0.96 1083.00 200.30 2.30 7.49 2.29 0.97 1263.50 200.49 2.49 7.88 2.49 0.99 1444.00 200.68 2.68 8.24 2.67 1.00 1580.00 200.81 2.81 8.48 2.80 1.01 1805.00 201.01 3.01 8.85 3.01 1.02 Tailwater Channel Data - Prop Culvert-2 Tailwater Channel Option: Irregular Channel Channel Slope: 0.0160 User Defined Channel Cross-Section: Coord No. Station (ft) Elevation (ft) Manning's n 1 0.00 210.00 0.0350 2 100.00 206.00 0.0350 3 160.00 198.00 0.0400 4 210.00 198.10 0.0400 5 230.00 202.00 0.0350 6 340.00 211.50 0.0350 7 360.00 212.00 0.0000 Roadway Data for Crossing: Prop Culvert-2 Roadway Profile Shape: Irregular Roadway Shape (coordinates) 32

Irregular Roadway Cross-Section: Coord No. Station (ft) Elevation (ft) 1 0.00 213.37 2 100.00 209.70 3 150.00 209.30 4 159.00 209.20 5 159.00 211.20 6 191.00 211.20 7 191.00 209.25 8 200.00 209.40 9 300.00 210.50 10 400.00 214.56 Roadway Surface: Paved Roadway Top Width: 36.00 ft 33

Crossing Front View (Roadway Profile): Prop Culvert-2 34

Table 10 - Summary of Culvert Flows at Crossing: Prop Culvert-3 Headwater Elevation (ft) Total Discharge (cfs) Prop- HW Elev 1.5' Below Shoulder Discharge (cfs) Roadway Discharge (cfs) Iterations 200.70 0.00 0.00 0.00 1 202.26 180.50 180.50 0.00 1 203.17 361.00 361.00 0.00 1 203.92 541.50 541.50 0.00 1 204.59 722.00 722.00 0.00 1 205.20 902.50 902.50 0.00 1 205.78 1083.00 1083.00 0.00 1 206.35 1263.50 1263.50 0.00 1 206.91 1444.00 1444.00 0.00 1 207.34 1580.00 1580.00 0.00 1 208.07 1805.00 1805.00 0.00 1 209.20 2123.48 2123.48 0.00 Overtopping 35

Rating Curve Plot for Crossing: Prop Culvert-3 36

Table 11 - Culvert Summary Table: Prop- HW Elev 1.5' Below Shoulder Total Discharge (cfs) Culvert Discharge (cfs) Headwater Elevation (ft) Inlet Control Depth (ft) Outlet Control Depth (ft) Flow Type Normal Depth (ft) Critical Depth (ft) Outlet Depth (ft) Tailwater Depth (ft) Outlet Velocity (ft/s) Tailwater Velocity (ft/s) 0.00 0.00 200.70 0.000 0.0* 0-NF 0.000 0.000 0.000 0.000 0.000 0.000 180.50 180.50 202.26 1.561 0.0* 1-S2n 0.428 0.923 0.555 0.868 9.038 3.989 361.00 361.00 203.17 2.466 0.0* 1-S2n 0.728 1.465 0.937 1.267 10.704 5.130 541.50 541.50 203.92 3.219 0.0* 1-S2n 0.943 1.919 1.277 1.580 11.775 5.918 722.00 722.00 204.59 3.887 0.0* 1-S2n 1.157 2.325 1.593 1.847 12.588 6.536 902.50 902.50 205.20 4.503 0.0* 1-S2n 1.332 2.698 1.888 2.083 13.277 7.050 1083.00 1083.00 205.78 5.084 0.0* 1-S2n 1.498 3.047 2.171 2.297 13.857 7.493 1263.50 1263.50 206.35 5.647 0.0* 1-S2n 1.663 3.377 2.441 2.494 14.380 7.884 1444.00 1444.00 206.91 6.208 0.0* 5-S2n 1.825 3.691 2.700 2.678 14.856 8.236 1580.00 1580.00 207.34 6.637 0.109 5-S2n 1.932 3.919 2.889 2.809 15.190 8.479 1805.00 1805.00 208.07 7.373 0.313 5-S2n 2.110 4.283 3.193 3.013 15.702 8.849 37

* theoretical depth is impractical. Depth reported is corrected. ******************************************************************************** Inlet Elevation (invert): 200.70 ft, Outlet Elevation (invert): 199.90 ft Culvert Length: 40.01 ft, Culvert Slope: 0.0200 ******************************************************************************** 38

Culvert Performance Curve Plot: Prop- HW Elev 1.5' Below Shoulder 39

Water Surface Profile Plot for Culvert: Prop- HW Elev 1.5' Below Shoulder Site Data - Prop- HW Elev 1.5' Below Shoulder Site Data Option: Culvert Invert Data Inlet Station: 10.00 ft Inlet Elevation: 200.70 ft Outlet Station: 50.00 ft Outlet Elevation: 199.90 ft Number of Barrels: 3 Culvert Data Summary - Prop- HW Elev 1.5' Below Shoulder Barrel Shape: Concrete Box Barrel Span: 12.00 ft Barrel Rise: 6.00 ft Barrel Material: Concrete Embedment: 0.00 in Barrel Manning's n: 0.0120 Inlet Type: Conventional Inlet Edge Condition: Square Edge (90º) Headwall Inlet Depression: None 40

Table 12 - Downstream Channel Rating Curve (Crossing: Prop Culvert-3) Flow (cfs) Water Surface Elev (ft) Depth (ft) Velocity (ft/s) Shear (psf) Froude Number 0.00 198.00 0.00 0.00 0.00 0.00 180.50 198.87 0.87 3.99 0.87 0.81 361.00 199.27 1.27 5.13 1.27 0.87 541.50 199.58 1.58 5.92 1.58 0.91 722.00 199.85 1.85 6.54 1.84 0.94 902.50 200.08 2.08 7.05 2.08 0.96 1083.00 200.30 2.30 7.49 2.29 0.97 1263.50 200.49 2.49 7.88 2.49 0.99 1444.00 200.68 2.68 8.24 2.67 1.00 1580.00 200.81 2.81 8.48 2.80 1.01 1805.00 201.01 3.01 8.85 3.01 1.02 Tailwater Channel Data - Prop Culvert-3 Tailwater Channel Option: Irregular Channel Channel Slope: 0.0160 User Defined Channel Cross-Section: Coord No. Station (ft) Elevation (ft) Manning's n 1 0.00 210.00 0.0350 2 100.00 206.00 0.0350 3 160.00 198.00 0.0400 4 210.00 198.10 0.0400 5 230.00 202.00 0.0350 6 340.00 211.50 0.0350 7 360.00 212.00 0.0000 Roadway Data for Crossing: Prop Culvert-3 Roadway Profile Shape: Irregular Roadway Shape (coordinates) 41

Irregular Roadway Cross-Section: Coord No. Station (ft) Elevation (ft) 1 0.00 213.37 2 100.00 209.70 3 150.00 209.30 4 159.00 209.20 5 159.00 211.20 6 191.00 211.20 7 191.00 209.25 8 200.00 209.40 9 300.00 210.50 10 400.00 214.56 Roadway Surface: Paved Roadway Top Width: 36.00 ft 42

Crossing Front View (Roadway Profile): Prop Culvert-3 43

7.0 PHOTOS 44

Upstream of Culvert 45

Upstream of Culvert 46

Downstream of Culvert 47

Downstream of Culvert 48

Downstream of Culvert 49

Parapet Wall 50

Parapet Wall 51

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