OKCross_Bayou_Conveyance_Report_09.27.2024.pdf
PDF 3 MB Posted
- Attached to
- Cross Bayou Athletic Association Complex Improvements - Professional Design-Build Services (PID 004556B)
- Solicitation number
- 25-0036-RFQ-DB
- Issued by
- Pinellas County, Clewiston City, Florida
About this file
This is a Conveyance Drainage Report prepared by GAI Consultants, Inc. for Pinellas County, Florida, detailing supplemental drainage calculations for the Cross Bayou Ballfields redevelopment project located at the southwest corner of 102nd Avenue and 98th Street North in unincorporated Seminole, Florida. The proposed park improvements include seven ballfields of varying sizes, surface parking, a restroom/concessions building, a maintenance building, and associated utilities and landscaping. The report presents storm sewer modeling and hydraulic analysis using ICPR 4 for post-development discharge rates and StormCAD V8i for pipe sizing and conveyance system evaluation. The analysis evaluated the storm sewer system for the 10-year/24-hour storm event as required by Pinellas County standards, with precipitation frequency estimates based on NOAA Atlas 14 data for the project area located at latitude 27.8638 and longitude -82.776 with an elevation of 8 feet.
The drainage calculations demonstrate that the hydraulic grade line (HGL) remained at least 1 foot below the grate elevation throughout the stormwater system for the 10-year/24-hour storm event, confirming the storm sewer conveyance system meets Pinellas County requirements. The modeling included both onsite and offsite runoff analysis, with detailed catchment tables, manhole specifications, conduit analysis, and profile diagrams showing drainage flow paths to two primary outfall points designated MES-1 and MES-2 for onsite drainage and MES-4 for offsite drainage. The report contains comprehensive StormCAD model results presented in Appendices A and B, along with a drainage basins map in Appendix C, providing detailed hydraulic and hydrologic data for the stormwater management system design. The analysis was completed in April 2024 and revised in September 2024, with the report prepared under Professional Engineer Aimee J. Shields' licensure in the State of Florida (No. 68011).
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Prepared by: GAI Consultants, Inc.
Orlando Office
618 East South Street, Suite 700 Orlando, Florida 32801
Prepared for: Pinellas County 14 South Fort Harrison Avenue
Clearwater, Florida 33756
Conveyance Drainage Calculations
Cross Bayou Ballfields Seminole, Florida
GAI Project Number: R220415.01
April 2024
Revised September 2024
STATE OF
No. 68011
PROFESSIONAL ENGIN
EE
R
AIMEE J. SHIELDS
FLORIDA
Conveyance Drainage Report
Pinellas County, FL
1.0 Supplemental Drainage Calculations
1.1 Storm Sewer Modeling
Pinellas County plans to redevelop the existing ballfields located at the southwest corner of 102nd Avenue and 98th Street North within the unincorporated City of Seminole. The proposed park improvements include seven ballfields of varying sizes, surface parking, a restroom/concessions building, a maintenance building, and associated utilities and landscaping. ICPR 4 was used to determine the Post- Development discharge rates for the 10-year/24-hour storm, as per Pinellas County requirements.
StormCAD V8i was used to perform hydraulic analysis and for sizing the pipes. Per Pinellas County requirements, the storm sewer system serving the project site was evaluated for the 10-year/24-hour storm event to the outfall points. The discharge rate from each storm was used for the storm sewer calculations performed by StormCAD V8i. The storm sewer calculations for the project are enclosed in Appendices A & B. The tailwater level for the onsite runoff model was based on the results of the AdICPR model for the detention pond staging for the respective storm. The 10-year/24-hour IDF curve used for analysis was based on NOAA precipitation frequency estimates for the project area.
The model results indicate that the hydraulic grade line (HGL) was contained at least 1 foot below the grate elevation in the stormwater system for the 10-year/24-hour storm event. Therefore, the storm sewer conveyance system meets Pinellas County requirements. See Appendices A & B for StormCAD V8i results and Appendix C for Drainage Basins Map.
Pinellas County, FL
APPENDIX A
Onsite Runoff StormCAD Model Results
10 Year / 24 Hours
NOAA Atlas 14, Volume 9, Version 2 Location name: Seminole, Florida, USA* Latitude: 27.8638°, Longitude: -82.776°
Elevation: 8 ft**
* source: ESRI Maps
** source: USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
Sanja Perica, Deborah Martin, Sandra Pavlovic, Ishani Roy, Michael St. Laurent, Carl Trypaluk, Dale Unruh, Michael Yekta, Geoffery Bonnin
NOAA, National Weather Service, Silver Spring, Maryland
PF_tabular | PF_graphical | Maps_&_aerials
PF tabular PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches/hour)1
Duration Average recurrence interval (years)
1 2 5 10 25 50 100 200 500 1000
5-min 6.74 (5.52‑8.41)
7.60 (6.20‑9.48)
8.93 (7.26‑11.2)
9.96 (8.06‑12.5)
11.3 (8.80‑14.6)
12.3 (9.35‑16.2)
13.2 (9.71‑17.9)
14.1 (9.91‑19.7)
15.1 (10.2‑21.9)
15.9 (10.5‑23.6)
10-min 4.94 (4.04‑6.16)
5.56 (4.54‑6.94)
6.53 (5.32‑8.18)
7.30 (5.90‑9.18)
8.29 (6.44‑10.7)
9.00 (6.85‑11.8)
9.67 (7.10‑13.1)
10.3 (7.25‑14.4)
11.1 (7.50‑16.0)
11.6 (7.68‑17.3)
15-min 4.02 (3.28‑5.01)
4.52 (3.69‑5.64)
5.31 (4.32‑6.65)
5.93 (4.80‑7.46)
6.74 (5.24‑8.70)
7.32 (5.56‑9.63)
7.86 (5.78‑10.6)
8.38 (5.90‑11.7)
9.01 (6.10‑13.0)
9.45 (6.24‑14.0)
30-min 3.08 (2.52‑3.84)
3.37 (2.76‑4.21)
3.87 (3.15‑4.85)
4.30 (3.48‑5.42)
4.92 (3.86‑6.43)
5.42 (4.15‑7.20)
5.93 (4.38‑8.12)
6.47 (4.58‑9.14)
7.21 (4.91‑10.5)
7.80 (5.15‑11.6)
60-min 2.01 (1.64‑2.50)
2.20 (1.80‑2.75)
2.55 (2.07‑3.19)
2.85 (2.31‑3.59)
3.30 (2.59‑4.32)
3.66 (2.81‑4.88)
4.04 (2.99‑5.55)
4.45 (3.16‑6.31)
5.02 (3.42‑7.34)
5.48 (3.62‑8.13)
2-hr 1.24 (1.02‑1.53)
1.36 (1.12‑1.69)
1.58 (1.29‑1.96)
1.78 (1.44‑2.22)
2.07 (1.64‑2.70)
2.31 (1.78‑3.06)
2.56 (1.91‑3.50)
2.84 (2.02‑4.00)
3.22 (2.21‑4.68)
3.53 (2.35‑5.20)
3-hr 0.898 (0.739‑1.11)
0.998 (0.822‑1.23)
1.18 (0.965‑1.46)
1.34 (1.09‑1.66)
1.58 (1.25‑2.05)
1.78 (1.37‑2.35)
1.99 (1.48‑2.70)
2.22 (1.59‑3.11)
2.54 (1.75‑3.68)
2.80 (1.87‑4.11)
6-hr 0.518 (0.429‑0.634)
0.582 (0.482‑0.714)
0.703 (0.579‑0.865)
0.816 (0.669‑1.01)
0.992 (0.797‑1.30)
1.14 (0.893‑1.52)
1.31 (0.987‑1.78)
1.49 (1.08‑2.10)
1.76 (1.22‑2.54)
1.97 (1.32‑2.88)
12-hr 0.297 (0.247‑0.361)
0.335 (0.278‑0.408)
0.412 (0.342‑0.504)
0.490 (0.404‑0.603)
0.618 (0.503‑0.813)
0.733 (0.578‑0.973)
0.861 (0.655‑1.18)
1.01 (0.734‑1.41)
1.22 (0.854‑1.76)
1.40 (0.946‑2.03)
24-hr 0.172 (0.144‑0.208)
0.196 (0.164‑0.238)
0.247 (0.206‑0.300)
0.300 (0.248‑0.366)
0.387 (0.318‑0.510)
0.467 (0.372‑0.620)
0.558 (0.428‑0.759)
0.660 (0.485‑0.925)
0.813 (0.574‑1.17)
0.941 (0.641‑1.36)
2-day 0.100 (0.084‑0.120)
0.116 (0.097‑0.139)
0.148 (0.124‑0.179)
0.181 (0.151‑0.220)
0.236 (0.195‑0.308)
0.285 (0.228‑0.375)
0.341 (0.263‑0.460)
0.404 (0.298‑0.561)
0.497 (0.353‑0.710)
0.575 (0.394‑0.823)
3-day 0.074 (0.063‑0.089)
0.085 (0.072‑0.102)
0.108 (0.091‑0.130)
0.131 (0.110‑0.159)
0.170 (0.141‑0.221)
0.205 (0.164‑0.269)
0.244 (0.189‑0.329)
0.289 (0.214‑0.400)
0.355 (0.253‑0.505)
0.410 (0.282‑0.585)
4-day 0.061 (0.051‑0.072)
0.069 (0.058‑0.082)
0.086 (0.072‑0.103)
0.104 (0.087‑0.125)
0.133 (0.111‑0.173)
0.160 (0.129‑0.209)
0.190 (0.147‑0.255)
0.224 (0.167‑0.310)
0.275 (0.197‑0.391)
0.318 (0.219‑0.452)
7-day 0.041 (0.035‑0.049)
0.046 (0.039‑0.055)
0.056 (0.047‑0.067)
0.066 (0.055‑0.079)
0.083 (0.069‑0.107)
0.098 (0.079‑0.128)
0.116 (0.090‑0.154)
0.136 (0.101‑0.186)
0.165 (0.118‑0.233)
0.189 (0.131‑0.268)
10-day 0.033 (0.028‑0.039)
0.036 (0.031‑0.043)
0.043 (0.037‑0.052)
0.051 (0.042‑0.060)
0.062 (0.052‑0.079)
0.073 (0.059‑0.094)
0.085 (0.066‑0.112)
0.098 (0.073‑0.134)
0.118 (0.085‑0.165)
0.134 (0.093‑0.190)
20-day 0.022 (0.019‑0.026)
0.024 (0.021‑0.029)
0.029 (0.024‑0.034)
0.032 (0.027‑0.038)
0.038 (0.031‑0.047)
0.043 (0.035‑0.054)
0.048 (0.037‑0.063)
0.054 (0.040‑0.072)
0.062 (0.045‑0.086)
0.069 (0.048‑0.096)
30-day 0.018 (0.015‑0.021)
0.020 (0.017‑0.024)
0.023 (0.020‑0.027)
0.026 (0.022‑0.031)
0.030 (0.025‑0.037)
0.033 (0.027‑0.042)
0.037 (0.029‑0.047)
0.040 (0.030‑0.054)
0.045 (0.032‑0.062)
0.049 (0.034‑0.068)
45-day 0.015 (0.013‑0.017)
0.017 (0.014‑0.020)
0.020 (0.017‑0.023)
0.022 (0.019‑0.026)
0.025 (0.021‑0.030)
0.027 (0.022‑0.034)
0.030 (0.023‑0.038)
0.032 (0.024‑0.042)
0.035 (0.025‑0.048)
0.037 (0.026‑0.052)
60-day 0.013 (0.011‑0.015)
0.015 (0.013‑0.017)
0.017 (0.015‑0.020)
0.020 (0.017‑0.023)
0.022 (0.018‑0.027)
0.024 (0.020‑0.030)
0.026 (0.020‑0.033)
0.028 (0.021‑0.037)
0.030 (0.022‑0.041)
0.032 (0.022‑0.044)
1 Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.
Please refer to NOAA Atlas 14 document for more information.
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PF graphical https://www.commerce.gov/ https://www.commerce.gov/ http://www.noaa.gov/
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Maps & aerials
Small scale terrain
Large scale terrain
3km
2mi
100km
60mi
Active Scenario: Base 10 Year - 24 Hour NOAA Storm
OVERALL - Time: 0.00 hours
D P
-2
D P
-3
A
D P
-3
D P
-4
DP-1
D P-1
D P
-1
D P
-2
D P
-2
D P
-2
D P
-2
D P
-2
DP-3
D P
-1
D P
- 34
D P-33
D P
-3
D P
-1
D P
-3
DP-38
Page 1 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
StormCAD [10.03.02.04]Bentley Systems, Inc. Haestad Methods Solution CenterCross Bayou StormCAD Model.stsw
NORTH - Time: 0.00 hours
D P-2
D P
-4
DP-1
DP-1
D P
-1
D P
-20
D P
-1
D P
-34
D P
-1
D P
-3
DP-38
Page 2 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
SOUTH - Time: 0.00 hours
D P
-3 0A
D P
-30
D P
-4
D P
-2
D P
-2
D P
-2
D P
-2
DP-3
D P-33
D P-
Page 3 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
Catchment Table - Time: 0.00 hours
Is Active?Flow (Total Out) (cfs)
Catchment CA (acres)
Time of Concentration
(min)
Area (Unified) (acres)
Outflow Element
Label
True5.450.74010.0001.286DS-12BASIN-85 True1.250.17010.0000.186DS-19BASIN-86 True5.450.73910.0001.285DS-38BASIN-87 True1.340.18210.0000.199DS-21BASIN-88 True1.450.19610.0000.207DS-33BASIN-89 True0.800.10910.0000.115DS-32BASIN-90 True0.250.03410.0000.125DS-30BASIN-91 True0.460.06210.0000.096DS-27BASIN-92 True0.510.07010.0000.107DS-28BASIN-93 True0.800.10910.0000.119DS-26BASIN-94 True0.970.13110.0000.144DS-25BASIN-95 True1.190.16210.0000.178DS-23BASIN-96 True0.800.10910.0000.119DS-24BASIN-97 True0.800.10910.0000.119DS-22BASIN-98 True0.810.10910.0000.120DS-20BASIN-99 True0.800.10910.0000.119DS-18BASIN-100 True1.320.17910.0000.196DS-17BASIN-101 True0.970.13210.0000.145DS-16BASIN-102 True1.020.13910.0000.152DS-15BASIN-103 True0.380.05110.0000.079DS-14BASIN-104 True0.130.01810.0000.028DS-13BASIN-105 True4.760.64610.0001.123DS-34BASIN-106 True0.750.10210.0000.117DS-36BASIN-107 True1.360.18510.0000.285DS-34BASIN-108 True0.040.00510.0000.025DS-40BASIN-109 True4.540.61510.0001.070DS-31BASIN-110
Page 4 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
Catch Basin Table - Time: 0.00 hours
Is Ever Overflowing?
Structure TypeInlet LocationHydraulic Grade Line
(Out) (ft)
Hydraulic Grade Line
(In) (ft)
Flow (Captured)
(cfs)
Capture Efficiency
(Calculated)
Elevation (Invert)
(ft)
Elevation (Rim) (ft)
Elevation (Ground)
(ft)
Label
FalseBox StructureIn Sag7.237.235.45100.04.408.908.90DS-12 FalseBox StructureIn Sag7.407.400.13100.04.1011.0011.00DS-13 FalseBox StructureIn Sag7.407.400.38100.03.859.009.00DS-14 FalseBox StructureIn Sag7.407.401.02100.03.458.658.65DS-15 FalseBox StructureIn Sag7.407.400.97100.04.659.659.65DS-16 FalseBox StructureIn Sag7.407.401.32100.02.958.508.50DS-17 FalseBox StructureIn Sag7.407.400.80100.04.159.509.50DS-18 FalseBox StructureIn Sag7.397.391.25100.01.748.508.50DS-19 FalseBox StructureIn Sag7.397.390.81100.03.958.508.50DS-20 FalseBox StructureIn Sag7.387.381.34100.01.418.458.45DS-21 FalseBox StructureIn Sag7.387.380.80100.03.758.508.50DS-22 FalseBox StructureIn Sag7.367.361.19100.01.088.508.50DS-23 FalseBox StructureIn Sag7.367.360.80100.04.158.508.50DS-24 FalseBox StructureIn Sag7.347.340.97100.00.758.508.50DS-25 FalseBox StructureIn Sag7.347.340.80100.03.558.508.50DS-26 FalseBox StructureIn Sag7.337.330.46100.00.468.458.45DS-27 FalseBox StructureIn Sag7.337.330.51100.04.008.458.45DS-28 FalseBox StructureIn Sag7.357.350.25100.04.058.458.45DS-30 FalseBox StructureIn Sag7.377.374.54100.04.359.009.00DS-31 FalseBox StructureIn Sag7.357.350.80100.04.258.858.85DS-32 FalseBox StructureIn Sag7.407.400.75100.05.3010.1010.10DS-36 FalseBox StructureIn Sag7.497.495.45100.05.159.209.20DS-38 FalseBox StructureIn Sag7.407.400.04100.05.258.858.85DS-40
Page 5 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
Manhole Table - Time: 0.00 hours
Is Ever Overflowing?
Hydraulic Grade Line
(Out) (ft)
Hydraulic Grade Line (In)
(ft)
Flow (Total Out) (cfs)
Elevation (Invert)
(ft)
Elevation (Rim) (ft)
Elevation (Ground)
(ft)
Label
False7.217.212.543.858.858.85DS-11 False7.407.401.453.329.209.20DS-33 False7.407.404.432.628.478.47DS-34 False7.407.407.191.999.309.30DS-39 False7.307.3017.990.078.508.50DS-41
Page 6 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
Outfall Table - Time: 0.00 hours
Flow (Total Out) (cfs)
Hydraulic Grade (ft)
Elevation (User Defined
Tailwater) (ft)
Boundary Condition Type
Elevation (Invert)
(ft)
Elevation (Ground)
(ft)
Label
17.967.307.30User Defined Tailwater0.008.50MES-1 2.507.217.21User Defined Tailwater3.758.50MES-2
Page 7 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
Conduit Table - Time: 0.00 hours
Hydraulic Grade Line
(Out) (ft)
Hydraulic Grade Line
(In) (ft)
Flow / Capacity (Design)
Capacity (Full Flow)
(cfs)
Velocity (ft/s)
Diameter (in)
Slope (Calculated)
(ft/ft)
Length (Unified)
(ft)
Invert (Stop)
(ft)
Stop Node
Invert (Start)
(ft)
Start Node
Label
7.217.2114.717.310.8124.00.00617.13.75MES-23.85DS-11DP-13
7.217.2317.515.590.8724.00.00594.83.95DS-114.40DS-12DP-14
7.407.400.341.590.0236.00.00438.63.95DS-144.10DS-13DP-15
7.407.404.144.530.2636.00.00467.33.55DS-153.85DS-14DP-16
7.407.406.814.200.3124.00.00438.14.50DS-154.65DS-16DP-17
7.407.406.841.900.4136.00.004101.33.05DS-173.45DS-15DP-18
7.407.405.614.200.2524.00.00438.14.00DS-174.15DS-18DP-19
7.397.409.441.900.5636.00.004101.32.55DS-192.95DS-17DP-20
7.397.395.714.200.2624.00.00438.13.80DS-193.95DS-20DP-21
7.387.3925.147.931.2542.00.002101.31.51DS-211.74DS-19DP-22
7.387.385.714.200.2624.00.00438.13.60DS-213.75DS-22DP-23
7.367.3827.247.931.3642.00.002101.31.18DS-231.41DS-21DP-24
7.367.365.714.200.2624.00.00438.14.00DS-234.15DS-24DP-25
7.347.3629.247.931.4542.00.002101.30.85DS-251.08DS-23DP-26
7.347.345.714.200.2624.00.00438.13.40DS-253.55DS-26DP-27
7.337.3430.949.301.5842.00.00279.10.56DS-270.75DS-25DP-28
7.337.333.315.690.1624.00.00541.63.80DS-274.00DS-28DP-29
7.307.3326.468.661.4448.00.002126.90.17DS-410.46DS-27DP-30
7.307.3026.468.101.4348.00.00231.10.00MES-10.07DS-41DP-30A
7.337.3533.514.011.4924.00.00465.23.80DS-274.05DS-30DP-31
7.357.3731.114.601.4424.00.00448.04.15DS-304.35DS-31DP-32
7.347.3512.66.370.4518.00.00495.13.90DS-254.25DS-32DP-33
7.407.404.531.860.2036.00.002263.02.72DS-343.32DS-33DP-34
7.407.409.248.400.4642.00.002229.02.09DS-392.62DS-34DP-35
7.407.4011.36.680.4318.00.00474.25.00DS-395.30DS-36DP-36
7.407.4978.56.943.0818.00.00434.45.00DS-395.15DS-38DP-38
7.407.400.66.570.0218.00.00463.95.00DS-395.25DS-40DP-40
7.397.4014.748.940.7542.00.00263.41.84DS-191.99DS-39DP-41
Page 8 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-33 to MES-1
0.00
5.00
10.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00 7+50 8+00 8+50 9+00 9+50 10+00 10+50 11+00
Station (ft)
E le va tio n ft
DS-39
Rim: 9.30 ft Invert: 1.99 ft
DS-33
Rim: 9.20 ft Invert: 3.32 ft
DS-34
Rim: 8.47 ft Invert: 2.62 ft
DS-41
Rim: 8.50 ft Invert: 0.07 ft
DS-27
Rim: 8.45 ft Invert: 0.46 ft
DS-25
Rim: 8.50 ft Invert: 0.75 ft
DS-23
Rim: 8.50 ft Invert: 1.08 ft
DS-21
Rim: 8.45 ft Invert: 1.41 ft
DS-19
Rim: 8.50 ft Invert: 1.74 ft
MES-1
Rim: 8.50 ft Invert: 0.00 ft
DP-35
DP-41
DP-22
DP-28
DP -26
DP-24
DP-34
DP-30A
DP -30
Page 9 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-36 to MES-1
0.00
5.00
10.00
15.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00
Station (ft)
E le va tio n (f t)
DS-39
Rim: 9.30 ft Invert: 1.99 ft
DS-41
Rim: 8.50 ft Invert: 0.07 ft
DS-36
Rim: 10.10 ft Invert: 5.30 ft
DS-27
Rim: 8.45 ft Invert: 0.46 ft
DS-25
Rim: 8.50 ft Invert: 0.75 ft
DS-23
Rim: 8.50 ft Invert: 1.08 ft
DS-21
Rim: 8.45 ft Invert: 1.41 ft
DS-19
Rim: 8.50 ft Invert: 1.74 ft
MES-1
Rim: 8.50 ft Invert: 0.00 ft
DP-3 6
D P-41 DP-22
DP-28
DP-26
DP-24
DP-30A
DP-30
Page 10 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-38 to MES-1
0.00
5.00
10.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50
Station (ft)
E le va tio n (f t)
DS-39
Rim: 9.30 ft Invert: 1.99 ft
DS-41
Rim: 8.50 ft Invert: 0.07 ft
DS-38
Rim: 9.20 ft Invert: 5.15 ft DS-27
Rim: 8.45 ft Invert: 0.46 ft
DS-25
Rim: 8.50 ft Invert: 0.75 ft
DS-23
Rim: 8.50 ft Invert: 1.08 ft
DS-21
Rim: 8.45 ft Invert: 1.41 ft
DS-19
Rim: 8.50 ft Invert: 1.74 ft
MES-1
Rim: 8.50 ft Invert: 0.00 ft
DP-38
DP-41 DP-22
DP-28
DP-26
DP-24
DP-30A
DP-30
Page 11 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-40 to MES-1
0.00
5.00
10.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00
Station (ft)
E le va tio n (f t)
DS-39
Rim: 9.30 ft Invert: 1.99 ft
DS-41
Rim: 8.50 ft Invert: 0.07 ftDS-40
Rim: 8.85 ft Invert: 5.25 ft
DS-27
Rim: 8.45 ft Invert: 0.46 ft
DS-25
Rim: 8.50 ft Invert: 0.75 ft
DS-23
Rim: 8.50 ft Invert: 1.08 ft
DS-21
Rim: 8.45 ft Invert: 1.41 ft
DS-19
Rim: 8.50 ft Invert: 1.74 ft
MES-1
Rim: 8.50 ft Invert: 0.00 ft
DP-4 0
DP-41 D P-22
D P-28
DP-26
DP-2 4
DP-30A
D P-30
Page 12 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-13 to MES-1
0.00
5.00
10.00
15.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00 7+50 8+00 8+50
Station (ft)
E le va tio n (f t)
DS-41
Rim: 8.50 ft Invert: 0.07 ft
DS-13
Rim: 11.00 ft Invert: 4.10 ft
DS-27
Rim: 8.45 ft Invert: 0.46 ft
DS-25
Rim: 8.50 ft Invert: 0.75 ft
DS-23
Rim: 8.50 ft Invert: 1.08 ft
DS-21
Rim: 8.45 ft Invert: 1.41 ft
DS-19
Rim: 8.50 ft Invert: 1.74 ft
DS-17
Rim: 8.50 ft Invert: 2.95 ft
DS-15
Rim: 8.65 ft Invert: 3.45 ft
DS-14
Rim: 9.00 ft Invert: 3.85 ft
MES-1
Rim: 8.50 ft Invert: 0.00 ft
DP-15
DP-22
DP-28
DP-26
DP -24
DP-20
DP -18
DP-16
DP-30A
DP-30
Page 13 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-16 to MES-1
0.00
5.00
10.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00 7+50 8+00
Station (ft)
E le va tio n (f t)
DS-41
Rim: 8.50 ft Invert: 0.07 ft
DS-27
Rim: 8.45 ft Invert: 0.46 ft
DS-25
Rim: 8.50 ft Invert: 0.75 ft
DS-23
Rim: 8.50 ft Invert: 1.08 ft
DS-21
Rim: 8.45 ft Invert: 1.41 ft
DS-19
Rim: 8.50 ft Invert: 1.74 ft
DS-17
Rim: 8.50 ft Invert: 2.95 ft
DS-15
Rim: 8.65 ft Invert: 3.45 ft
DS-16
Rim: 9.65 ft Invert: 4.65 ft MES-1
Rim: 8.50 ft Invert: 0.00 ft
DP-17
DP-22
DP-28
DP-26DP-24
DP-20
DP-18
DP-30A
DP-30
Page 14 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-18 to MES-1
0.00
5.00
10.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00
Station (ft)
E le va ti o n
(f t)
DS-41
Rim: 8.50 ft Invert: 0.07 ftDS-27
Rim: 8.45 ft Invert: 0.46 ft
DS-25
Rim: 8.50 ft Invert: 0.75 ft
DS-23
Rim: 8.50 ft Invert: 1.08 ft
DS-21
Rim: 8.45 ft Invert: 1.41 ft
DS-19
Rim: 8.50 ft Invert: 1.74 ft
DS-17
Rim: 8.50 ft Invert: 2.95 ft
DS-18
Rim: 9.50 ft Invert: 4.15 ft MES-1
Rim: 8.50 ft Invert: 0.00 ft
D P-22
DP-28
D P-26
D P-24
D P-20
DP-19
DP-30A
D P-30
Page 15 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-20 to MES-1
0.00
5.00
10.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00
Station (ft)
E le va tio n (f t)
DS-41
Rim: 8.50 ft Invert: 0.07 ftDS-27
Rim: 8.45 ft Invert: 0.46 ft
DS-25
Rim: 8.50 ft Invert: 0.75 ft
DS-23
Rim: 8.50 ft Invert: 1.08 ft
DS-21
Rim: 8.45 ft Invert: 1.41 ft
DS-19
Rim: 8.50 ft Invert: 1.74 ft
DS-20
Rim: 8.50 ft Invert: 3.95 ft
MES-1
Rim: 8.50 ft Invert: 0.00 ft
DP-22
DP-28
D P-26
DP-24
DP-21
DP-30A
DP-30
Page 16 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-22 to MES-1
0.00
5.00
10.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00
Station (ft)
E le va tio n ft
DS-41
Rim: 8.50 ft Invert: 0.07 ft
DS-27
Rim: 8.45 ft Invert: 0.46 ft
DS-25
Rim: 8.50 ft Invert: 0.75 ft
DS-23
Rim: 8.50 ft Invert: 1.08 ft
DS-21
Rim: 8.45 ft Invert: 1.41 ft
DS-22
Rim: 8.50 ft Invert: 3.75 ft
MES-1
Rim: 8.50 ft Invert: 0.00 ft
DP-28
DP-26
DP-24
DP-23
DP-30A
DP-30
Page 17 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-24 to MES-1
0.00
5.00
10.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00
Station (ft)
E le va tio n ft
DS-41
Rim: 8.50 ft Invert: 0.07 ft
DS-27
Rim: 8.45 ft Invert: 0.46 ft
DS-25
Rim: 8.50 ft Invert: 0.75 ft
DS-23
Rim: 8.50 ft Invert: 1.08 ft
DS-24
Rim: 8.50 ft Invert: 4.15 ft
MES-1
Rim: 8.50 ft Invert: 0.00 ft
DP-28
DP-26
DP-25
DP-30A
DP-30
Page 18 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-32 to MES-1
0.00
5.00
10.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00
Station (ft)
E le va tio n ft
DS-41
Rim: 8.50 ft Invert: 0.07 ftDS-32
Rim: 8.85 ft Invert: 4.25 ft
DS-27
Rim: 8.45 ft Invert: 0.46 ft
DS-25
Rim: 8.50 ft Invert: 0.75 ft
MES-1
Rim: 8.50 ft Invert: 0.00 ft
DP-28
DP-33
DP-30A
DP-30
Page 19 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-26 to MES-1
0.00
5.00
10.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00
Station (ft)
E le va tio n ft
DS-41
Rim: 8.50 ft Invert: 0.07 ftDS-27
Rim: 8.45 ft Invert: 0.46 ft
DS-25
Rim: 8.50 ft Invert: 0.75 ft
DS-26
Rim: 8.50 ft Invert: 3.55 ft
MES-1
Rim: 8.50 ft Invert: 0.00 ft
DP-28
DP-27
DP-30A
DP-30
Page 20 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-31 to MES-1
0.00
5.00
10.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00
Station (ft)
E le va tio n ft
DS-41
Rim: 8.50 ft Invert: 0.07 ft
DS-31
Rim: 9.00 ft Invert: 4.35 ft
DS-30
Rim: 8.45 ft Invert: 4.05 ft
DS-27
Rim: 8.45 ft Invert: 0.46 ft
MES-1
Rim: 8.50 ft Invert: 0.00 ft
DP-31
DP-32
DP-30A
DP-30
Page 21 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-28 to MES-1
0.00
5.00
10.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00
Station (ft)
E le va tio n ft
DS-41
Rim: 8.50 ft Invert: 0.07 ft
DS-27
Rim: 8.45 ft Invert: 0.46 ft
DS-28
Rim: 8.45 ft Invert: 4.00 ft
MES-1
Rim: 8.50 ft Invert: 0.00 ft
DP-29
DP-30A
DP-30
Page 22 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
DS-12 to MES-2
0.00
5.00
10.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00
Station (ft)
E le va tio n ft
DS-11
3.85
8.85 MES-2
3.75 8.50
DS-12
4.40
DP-13
Circle
DP-14
Circle
Page 23 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
MES-2 to MES-1
0.00
5.00
10.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00 7+50 8+00 8+50 9+00 9+50 10+00
Station (ft)
E le va ti o n
(f t)
DS-41
Rim: 8.50 ft Invert: 0.07 ftDS-11
Rim: 8.85 ft Invert: 3.85 ft
DS-12
Rim: 8.90 ft Invert: 4.40 ft
DS-27
Rim: 8.45 ft Invert: 0.46 ft
DS-25
Rim: 8.50 ft Invert: 0.75 ft
DS-23
Rim: 8.50 ft Invert: 1.08 ft
DS-21
Rim: 8.45 ft Invert: 1.41 ft
DS-19
Rim: 8.50 ft Invert: 1.74 ft
DS-17
Rim: 8.50 ft Invert: 2.95 ft
DS-15
Rim: 8.65 ft Invert: 3.45 ft
DS-14
Rim: 9.00 ft Invert: 3.85 ft
MES-1
Rim: 8.50 ft Invert: 0.00 ft
MES-2
Rim: 8.50 ft Invert: 3.75 ft
DP-30A
DP-30
DP-22
DP-28
DP-26
DP-24
DP-20
DP-18
DP -16DP-2
DP-13
DP-14
Page 24 of 2427 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16669/27/2024
Pinellas County, FL
APPENDIX B
Offsite Runoff StormCAD Model Results
10 Year / 24 Hours
NOAA Atlas 14, Volume 9, Version 2 Location name: Seminole, Florida, USA* Latitude: 27.8638°, Longitude: -82.776°
Elevation: 8 ft**
* source: ESRI Maps
** source: USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
Sanja Perica, Deborah Martin, Sandra Pavlovic, Ishani Roy, Michael St. Laurent, Carl Trypaluk, Dale Unruh, Michael Yekta, Geoffery Bonnin
NOAA, National Weather Service, Silver Spring, Maryland
PF_tabular | PF_graphical | Maps_&_aerials
PF tabular PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches/hour)1
Duration Average recurrence interval (years)
1 2 5 10 25 50 100 200 500 1000
5-min 6.74 (5.52‑8.41)
7.60 (6.20‑9.48)
8.93 (7.26‑11.2)
9.96 (8.06‑12.5)
11.3 (8.80‑14.6)
12.3 (9.35‑16.2)
13.2 (9.71‑17.9)
14.1 (9.91‑19.7)
15.1 (10.2‑21.9)
15.9 (10.5‑23.6)
10-min 4.94 (4.04‑6.16)
5.56 (4.54‑6.94)
6.53 (5.32‑8.18)
7.30 (5.90‑9.18)
8.29 (6.44‑10.7)
9.00 (6.85‑11.8)
9.67 (7.10‑13.1)
10.3 (7.25‑14.4)
11.1 (7.50‑16.0)
11.6 (7.68‑17.3)
15-min 4.02 (3.28‑5.01)
4.52 (3.69‑5.64)
5.31 (4.32‑6.65)
5.93 (4.80‑7.46)
6.74 (5.24‑8.70)
7.32 (5.56‑9.63)
7.86 (5.78‑10.6)
8.38 (5.90‑11.7)
9.01 (6.10‑13.0)
9.45 (6.24‑14.0)
30-min 3.08 (2.52‑3.84)
3.37 (2.76‑4.21)
3.87 (3.15‑4.85)
4.30 (3.48‑5.42)
4.92 (3.86‑6.43)
5.42 (4.15‑7.20)
5.93 (4.38‑8.12)
6.47 (4.58‑9.14)
7.21 (4.91‑10.5)
7.80 (5.15‑11.6)
60-min 2.01 (1.64‑2.50)
2.20 (1.80‑2.75)
2.55 (2.07‑3.19)
2.85 (2.31‑3.59)
3.30 (2.59‑4.32)
3.66 (2.81‑4.88)
4.04 (2.99‑5.55)
4.45 (3.16‑6.31)
5.02 (3.42‑7.34)
5.48 (3.62‑8.13)
2-hr 1.24 (1.02‑1.53)
1.36 (1.12‑1.69)
1.58 (1.29‑1.96)
1.78 (1.44‑2.22)
2.07 (1.64‑2.70)
2.31 (1.78‑3.06)
2.56 (1.91‑3.50)
2.84 (2.02‑4.00)
3.22 (2.21‑4.68)
3.53 (2.35‑5.20)
3-hr 0.898 (0.739‑1.11)
0.998 (0.822‑1.23)
1.18 (0.965‑1.46)
1.34 (1.09‑1.66)
1.58 (1.25‑2.05)
1.78 (1.37‑2.35)
1.99 (1.48‑2.70)
2.22 (1.59‑3.11)
2.54 (1.75‑3.68)
2.80 (1.87‑4.11)
6-hr 0.518 (0.429‑0.634)
0.582 (0.482‑0.714)
0.703 (0.579‑0.865)
0.816 (0.669‑1.01)
0.992 (0.797‑1.30)
1.14 (0.893‑1.52)
1.31 (0.987‑1.78)
1.49 (1.08‑2.10)
1.76 (1.22‑2.54)
1.97 (1.32‑2.88)
12-hr 0.297 (0.247‑0.361)
0.335 (0.278‑0.408)
0.412 (0.342‑0.504)
0.490 (0.404‑0.603)
0.618 (0.503‑0.813)
0.733 (0.578‑0.973)
0.861 (0.655‑1.18)
1.01 (0.734‑1.41)
1.22 (0.854‑1.76)
1.40 (0.946‑2.03)
24-hr 0.172 (0.144‑0.208)
0.196 (0.164‑0.238)
0.247 (0.206‑0.300)
0.300 (0.248‑0.366)
0.387 (0.318‑0.510)
0.467 (0.372‑0.620)
0.558 (0.428‑0.759)
0.660 (0.485‑0.925)
0.813 (0.574‑1.17)
0.941 (0.641‑1.36)
2-day 0.100 (0.084‑0.120)
0.116 (0.097‑0.139)
0.148 (0.124‑0.179)
0.181 (0.151‑0.220)
0.236 (0.195‑0.308)
0.285 (0.228‑0.375)
0.341 (0.263‑0.460)
0.404 (0.298‑0.561)
0.497 (0.353‑0.710)
0.575 (0.394‑0.823)
3-day 0.074 (0.063‑0.089)
0.085 (0.072‑0.102)
0.108 (0.091‑0.130)
0.131 (0.110‑0.159)
0.170 (0.141‑0.221)
0.205 (0.164‑0.269)
0.244 (0.189‑0.329)
0.289 (0.214‑0.400)
0.355 (0.253‑0.505)
0.410 (0.282‑0.585)
4-day 0.061 (0.051‑0.072)
0.069 (0.058‑0.082)
0.086 (0.072‑0.103)
0.104 (0.087‑0.125)
0.133 (0.111‑0.173)
0.160 (0.129‑0.209)
0.190 (0.147‑0.255)
0.224 (0.167‑0.310)
0.275 (0.197‑0.391)
0.318 (0.219‑0.452)
7-day 0.041 (0.035‑0.049)
0.046 (0.039‑0.055)
0.056 (0.047‑0.067)
0.066 (0.055‑0.079)
0.083 (0.069‑0.107)
0.098 (0.079‑0.128)
0.116 (0.090‑0.154)
0.136 (0.101‑0.186)
0.165 (0.118‑0.233)
0.189 (0.131‑0.268)
10-day 0.033 (0.028‑0.039)
0.036 (0.031‑0.043)
0.043 (0.037‑0.052)
0.051 (0.042‑0.060)
0.062 (0.052‑0.079)
0.073 (0.059‑0.094)
0.085 (0.066‑0.112)
0.098 (0.073‑0.134)
0.118 (0.085‑0.165)
0.134 (0.093‑0.190)
20-day 0.022 (0.019‑0.026)
0.024 (0.021‑0.029)
0.029 (0.024‑0.034)
0.032 (0.027‑0.038)
0.038 (0.031‑0.047)
0.043 (0.035‑0.054)
0.048 (0.037‑0.063)
0.054 (0.040‑0.072)
0.062 (0.045‑0.086)
0.069 (0.048‑0.096)
30-day 0.018 (0.015‑0.021)
0.020 (0.017‑0.024)
0.023 (0.020‑0.027)
0.026 (0.022‑0.031)
0.030 (0.025‑0.037)
0.033 (0.027‑0.042)
0.037 (0.029‑0.047)
0.040 (0.030‑0.054)
0.045 (0.032‑0.062)
0.049 (0.034‑0.068)
45-day 0.015 (0.013‑0.017)
0.017 (0.014‑0.020)
0.020 (0.017‑0.023)
0.022 (0.019‑0.026)
0.025 (0.021‑0.030)
0.027 (0.022‑0.034)
0.030 (0.023‑0.038)
0.032 (0.024‑0.042)
0.035 (0.025‑0.048)
0.037 (0.026‑0.052)
60-day 0.013 (0.011‑0.015)
0.015 (0.013‑0.017)
0.017 (0.015‑0.020)
0.020 (0.017‑0.023)
0.022 (0.018‑0.027)
0.024 (0.020‑0.030)
0.026 (0.020‑0.033)
0.028 (0.021‑0.037)
0.030 (0.022‑0.041)
0.032 (0.022‑0.044)
1 Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.
Please refer to NOAA Atlas 14 document for more information.
Back to Top
PF graphical https://www.commerce.gov/ https://www.commerce.gov/
Back to Top
Maps & aerials
Small scale terrain
Large scale terrain
3km
2mi
100km
60mi
10 Year - 24 Hour Storm
Cross Bayou OFFSITE StormCAD
OVERALL - Time: 0.00 hours
D P
-6 D
P -8
DP-9
D P
-1
D P
-1
D P
-3
D P
-4
Page 1 of 1127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16664/24/2024
[10.03.02.04]Bentley Systems, Inc. Haestad Methods Solution CenterCross Bayou OFFSITE StormCAD.stsw
Cross Bayou OFFSITE StormCAD
NORTH - Time: 0.00 hours
D P
-6 D
P -8
D P
- 3
D P
-4
Page 2 of 1127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16664/24/2024
Cross Bayou OFFSITE StormCAD
SOUTH - Time: 0.00 hours
D P
-6 D
P -8
DP-9
D P
-1
D P
-1
Page 3 of 1127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16664/24/2024
Cross Bayou OFFSITE StormCAD
Catchment Table - Time: 0.00 hours
Flow (Total Out) (cfs)
Time of Concentration
(min)
Catchment Intensity
(in/h)
Catchment CA (acres)
Area (Unified) (acres)
Outflow Element
Label
4.8610.0007.3110.65920.8645DS-1OFFSITE BASIN-130
2.1710.0007.3110.29410.3223DS-1OFFSITE BASIN-131
0.9310.0007.3110.12600.1381DS-9OFFSITE BASIN-132
1.7310.0007.3110.23500.2575DS-4OFFSITE BASIN-153
1.7710.0007.3110.24050.2635DS-10OFFSITE BASIN-154
Page 4 of 1127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16664/24/2024
Cross Bayou OFFSITE StormCAD
Manhole Table - Time: 0.00 hours
Is Ever Overflowing?
Hydraulic Grade Line
(Out) (ft)
Hydraulic Grade Line (In)
(ft)
Flow (Total Out) (cfs)
Elevation (Invert)
(ft)
Elevation (Rim) (ft)
Elevation (Ground)
(ft)
Label
False7.347.347.025.3010.0010.00DS-1 False6.356.358.624.8510.3010.30DS-2 False6.766.768.855.089.309.30DS-3 False6.776.771.735.7910.1510.15DS-4 False6.976.977.705.279.459.45DS-5 False7.137.132.425.579.109.10DS-6 False7.157.152.475.619.209.20DS-7 False7.197.192.545.679.159.15DS-8 False7.197.190.936.009.459.45DS-9 False7.297.291.775.819.009.00DS-10
Page 5 of 1127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16664/24/2024
Cross Bayou OFFSITE StormCAD
Outfall Table - Time: 0.00 hours
Flow (Total Out) (cfs)
Hydraulic Grade (ft)
Elevation (User Defined
Tailwater) (ft)
Boundary Condition Type
Elevation (Invert)
(ft)
Elevation (Ground)
(ft)
Label
8.415.805.80User Defined Tailwater4.569.20MES-4
Page 6 of 1127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16664/24/2024
Cross Bayou OFFSITE StormCAD
Conduit Table - Time: 0.00 hours
Cover (Stop) (ft)
Cover (Start) (ft)
Flow (cfs)
Hydraulic Grade Line
(Out) (ft)
Hydraulic Grade Line
(In) (ft)
Flow / Capacity (Design)
Capacity (Full Flow)
(cfs)
Velocity (ft/s)
Diameter (in)
Slope (Calculated)
(ft/ft)
Length (Unified)
(ft)
Invert (Stop)
(ft)
Stop NodeInvert (Start)
(ft)
Start NodeLabel
2.643.458.625.806.35104.308.262.9824.00.001217.44.56MES-44.85DS-2DP-3
3.452.228.856.356.76122.727.212.8224.00.001226.54.85DS-25.08DS-3DP-4
2.443.101.736.766.7737.034.683.5315.00.00536.25.61DS-35.80DS-4DP-5
2.222.187.706.766.97108.147.122.4524.00.001191.95.08DS-35.27DS-5DP-6
2.933.347.026.977.34163.584.295.7215.00.00431.75.27DS-55.41DS-1DP-7
2.682.032.426.977.1372.503.341.3718.00.001296.45.27DS-55.57DS-6DP-8
2.032.092.477.137.1572.373.411.4018.00.00137.95.57DS-65.61DS-7DP-9
2.091.982.547.157.1978.733.231.4418.00.00163.45.61DS-75.67DS-8DP-10
2.232.200.937.197.197.7811.945.7815.00.0349.75.67DS-86.00DS-9DP-11
2.231.941.777.197.2984.372.101.4415.00.001132.45.67DS-85.81DS-10DP-12
Page 7 of 1127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16664/24/2024
Cross Bayou OFFSITE StormCAD
DS-10 to MES-4
0.00
5.00
10.00
15.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00 7+50 8+00 8+50 9+00 9+50 10+00 10+50 11+00 11+50 12+00
Station (ft)
E le v at io n ft)
DS-8
Rim: 9.15 ft Invert: 5.67 ft
DS-10
Rim: 9.00 ft Invert: 5.81 ft
DS-5
Rim: 9.45 ft Invert: 5.27 ft
DS-2
Rim: 10.30 ft Invert: 4.85 ftDS-3
Rim: 9.30 ft Invert: 5.08 ft
DS-6
Rim: 9.10 ft Invert: 5.57 ft
DS-7
Rim: 9.20 ft Invert: 5.61 ft MES-4
Rim: 9.20 ft Invert: 4.56 ft
DP-6DP-8DP-9DP-10DP-12
DP-3
DP-4
Page 8 of 1127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16664/24/2024
Cross Bayou OFFSITE StormCAD
DS-9 to MES-4
0.00
5.00
10.00
15.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00 7+50 8+00 8+50 9+00 9+50 10+00 10+50
Station (ft)
E le v a tio n ft)
DS-8
Rim: 9.15 ft Invert: 5.67 ft
DS-9
Rim: 9.45 ft Invert: 6.00 ft
DS-5
Rim: 9.45 ft Invert: 5.27 ft
DS-2
Rim: 10.30 ft Invert: 4.85 ftDS-3
Rim: 9.30 ft Invert: 5.08 ft
DS-6
Rim: 9.10 ft Invert: 5.57 ft
DS-7
Rim: 9.20 ft Invert: 5.61 ft MES-4
Rim: 9.20 ft Invert: 4.56 ft
D P-11 DP-6DP-8DP-9DP-10
DP -3
DP-4
Page 9 of 1127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16664/24/2024
Cross Bayou OFFSITE StormCAD
DS-1 to MES-4
0.00
5.00
10.00
15.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00
Station (ft)
El e va tio n (f t)
DS-1
Rim: 10.00 ft Invert: 5.30 ft
DS-5
Rim: 9.45 ft Invert: 5.27 ft
DS-2
Rim: 10.30 ft Invert: 4.85 ftDS-3
Rim: 9.30 ft Invert: 5.08 ft
MES-4
Rim: 9.20 ft Invert: 4.56 ft
DP-7
DP-6
D P-3 D P-4
Page 10 of 1127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16664/24/2024
Cross Bayou OFFSITE StormCAD
DS-4 to MES-3
0.00
5.00
10.00
15.00
-0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00
Station (ft)
E le va tio n (f t)
DS-3
Rim: 9.30 ft Invert: 5.08 ft
DS-4
Rim: 10.15 ft Invert: 5.79 ft
DS-2
Rim: 10.30 ft Invert: 4.85 ft MES-4
Rim: 9.20 ft Invert: 4.56 ft
DP-5
DP-3DP-4
Page 11 of 1127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-16664/24/2024
Pinellas County, FL
APPENDIX C
Drainage Basin Map
Feet 2001000 50
| 2024-09-27T16:09:40-0400 | |
| Aimee Shields |
File details come from the government source that posted it. Updated .