8-26_03_HAM892326B H&H Report.pdf

PDF 2 MB Posted Apr 15, 2026

Attached to: Ham892326B 26-03 (Hamilton)
Solicitation number: 009_RFB_WRBWL_BY26-03
Issued by: Hancock County, Iowa

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Written by GovTribe AI · Apr 27, 2026

This is a Peterson Wetland Design Report prepared by Bolton & Menk, Inc. for the Iowa Department of Agriculture & Land Stewardship, Division of Soil and Water Quality, dated July 15, 2025, detailing the engineering design for a nutrient reduction wetland improvement project (Site HAM892326B) located on the Peterson property near Williams in Hamilton County, Iowa. The project involves converting an existing pothole into a wetland to reduce nitrates and phosphorus in the watershed of Drainage District #20, serving a 518-acre drainage area. The design includes re-laying existing tile drainage systems (one tile main, one branch district tile, and one private tile), constructing a rectangular wetland inlet structure and outlet structure with an 18-inch outlet tile, creating a separation berm between the wetland pool and a proposed Hamilton County borrow pit, installing a connection channel between the two pools, and implementing a diversion berm and cover berm within the wetland pool. The project was classified as NRCS Job Class IV under Conservation Practice Standard (CPS) 656 and uses CPS 587 for water control structures. The design was developed using survey-grade GPS equipment, LiDAR data, HydroCAD hydrologic modeling with MSE 3 rainfall distribution, and SCS TR-20 methodology. The normal pool elevation is 1,170.50 feet with a storage capacity of 6.38 acre-feet, and the design accommodates 2-, 5-, 10-, 25-, 50-, and 100-year storm events with peak elevations ranging from 1,173.29 feet to 1,175.31 feet.

The wetland design incorporates a primary outlet consisting of an 18-inch reinforced concrete pipe culvert controlling flow through a sharp-crested rectangular weir and a secondary overflow structure at elevation 1,174.00 feet to handle larger storm events. Soil analysis identified primarily loam soils (Canisteo, Nicollet, and Clarion series) with hydrologic soil groups B, C, and C/D, resulting in a runoff curve number of 84.7 for the 475-acre surface-drained watershed. The permanent easement for the project will be recorded on the Peterson property, with IDALS-DSWQ responsible for obtaining all necessary permits. The design emphasizes water quality benefits through nutrient reduction via natural processes, with nitrate conversion to nitrogen gas and sediment/phosphorus capture in the wetland pool, noting that sediment will require periodic removal. All technical calculations, including pipe capacity analyses, stage-storage relationships, and hydrologic routing for multiple design storms, are provided in the report appendices to support the construction bidding process.

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File	Type	Posted
1384401-event.pdf	PDF	Apr 15, 2026
1-26-03 Ham892326B_General_Requirements.pdf	PDF	Apr 15, 2026
5-_26-03_Ham892326B_Specifications_01-22-2026.pdf	PDF	Apr 15, 2026
7-_26-03_Ham892326B_Appendix_I_.pdf	PDF	Apr 15, 2026
9-26_03_HAM892326B QA QC Plan.pdf	PDF	Apr 15, 2026
3-26-03 Ham892326B_Proposal-Affidavit_Document-CC(UPLOAD).pdf	PDF	Apr 15, 2026
2-26-03 Ham892326B_Notice_to_Bidders.pdf	PDF	Apr 15, 2026
4-26-03 Ham892326B_Bid-Bond_DocEE(UPLOAD).pdf	PDF	Apr 15, 2026
6-_26-03_Ham892326B_Plan Sheet Set_ 2026-01-22.pdf	PDF	Apr 15, 2026

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H:\HAMILTON_CO_IA\0A1127685\3_Design\C_Reports\Peterson Design Report.docx

July 15, 2025

Peterson Wetland Design Report Site No. HAM892326B Hamilton County, Iowa

This wetland improvement is planned to provide nutrient reduction benefits to a part of the watershed of Drainage District #20 in Hamilton County, Iowa. Nitrates will be converted to nitrogen gas through natural processes as the water passes through the wetland. Sediment with phosphorus will also be captured but will need to be removed from time to time.

The project location is on the property of Gerald and Janelle Peterson and Joel and Debbie Peterson, near Williams, Iowa. The existing site includes one tile main, one branch district tile, and one private tile.

The existing main and branch tiles will be re-laid and diverted to the wetland inlet channel. The private tile will be re-laid and diverted to the future Hamilton County borrow pit north of the wetland pool. A temporary channel will be dug from the private tile outlet to the connection channel between the borrow pit and wetland pool. A partial capture inlet will divert most of the water from the private tile and carry it through a tile, providing sufficient head to push water through the rectangular wetland inlet structure at the wetland inlet channel. From the inlet channel, water will meander through the wetland pool, where nutrient concentrations will be reduced by natural processes. The water will leave the pool at the rectangular wetland outlet structure and be carried through an 18” outlet tile that will connect to the existing district tile main east of the wetland pool. A separation berm is proposed between the wetland pool and the proposed Hamilton County borrow pit pool. A connection channel is proposed to be placed between the two pools to maintain consistent water surface elevations. A proposed diversion berm is to be placed in the wetland pool near the connection channel to ensure water from the borrow pond has sufficient detention time for nutrient reduction. A proposed cover berm will be placed at the southwest side of the pool to cover the tile re-lays and ensure the land can still be farmed. During large storm events, the pothole will fill and runoff will flow overland at the existing low point northeast of the wetland. Constructing the wetland will not have adverse effects on the existing hydrology of the pothole.

This site was deemed viable because of the size of its watershed (518 acres) and its topography. The existing pothole can be converted to a wetland, and the drainage district tiles that currently drain the pothole can be re-laid to the ground surface. Initial payment information was presented to the landowner, who wished to proceed with the project.

Bolton & Menk reviewed the soil survey data for the location and found the soils to be primarily loam.

After this review, it was determined that soil borings were unnecessary. The wetland watersheds were analyzed using LiDAR data, with land uses delineated and existing potholes and culverts accounted for. A map of the contributing watersheds is included with this report. Curve number calculations and runoff analysis are provided in the attached hydrology outputs.

Name: Peterson Wetland Design Report Date: July 15, 2025 Page: 2

Site features were surveyed with survey-grade GPS equipment, and additional topographic information was obtained from a publicly available LiDAR database. The existing tiles were surveyed at locations of existing blowouts to obtain profile data for the existing facilities. Elevations are referenced to NAVD88, and the Iowa State Plane North (Survey Foot) coordinate system was used for horizontal coordinates.

Survey data was collected electronically and is available in .csv files.

Iowa NRCS Conservation Practice Standard (CPS) 656, dated December 2023, was used to develop this project. CPS 587 (Structure for Water Control) was used for the water control structure. The project is NRCS Job Class IV under CPS 656 because the watershed is between 300 and 1000 acres.

The excavation elevations and permanent pool elevations were selected based on the ability to daylight existing tiles into the wetland pool. The watershed information and rainfall data were used to develop hydrographs in HydroCAD. The storm distribution used was MSE 3, with rainfall depths from the National Engineering Handbook. These hydrographs and the proposed stage-storage information were used to size the outlet for the wetland. HydroCAD outputs are provided in the appendix.

Two tiles are planned to be re-laid into the wetland pool, one tile will be re-laid into the borrow pit pool, and a partial capture inlet will be routed to the wetland pool. Profiles are provided in the plans for the tiles. Pipe sizing calculations are provided in the appendix.

The permanent easement for this project will be on the Peterson property. IDALS-DSWQ is currently in the process of updating the abstracts and will have a signed easement recorded for the area as shown in the plans. No additional land rights are needed.

All necessary permits for this project will be obtained by IDALS.

Sincerely, Brandon C. Short, PE Project Engineer Bolton & Menk, Inc.

Appendices: Soil Survey Map Watershed and Land Use Hydrology Report HydroCAD Output Pipe Capacity Calculations

Page: 3

Web Soil Survey Map

Page: 4

Watersheds and Land Use

Page: 5

Hydrology Report

25-year Event: 5.50'' 100-year Event: 7.2''

* Hydrologic Soil Groups: B, C, C/D

* Runoff Curve Number: 84.7 (based on Land use shown in this report)

Tc = 1.5 hours determined by the sum of sheet, shallow concentrated and channel flow times.

Design Parameters and Procedures:

Hydrology Analysis Summary

Normal Pool area is 6.54 ac; surface watershed area is approx. 475 ac or 0.74 square miles

Report Summary

Design hydrology and hydraulic study of this site was completed. The drainage area was determined and a stage-area-storage curve was developed based on the topographic survey, Lidar data available from the Iowa Department of Natural Resources, and grading design for the wetland. Land use and treatment were determined through a site visit and aerial photo review and depression areas were found. Hydrologic data was compiled, sediment calculations were made, the structure was flood routed using the SCS method in HydroCAD Software, and all the output was reviewed.

Rainfall events used for this site were MSE 3, 24-hour, 5-, 10-, 25-, and 100-year events. The primary spillway is an outlet structure with a rectangular weir and a four-foot wide opening that discharges to the existing drain tile main. The secondary spillway is a the natural overflow of the existing pothole. Values shown below for Q Out include overland flow and tile flow, including some flow that does not pass through the wetland.

H:\HAMILTON_CO_IA\0A1127685\3_Design\C_Reports\Peterson Hydrology Report.xlsm

IDALS ID Number: HAM892326B Job: Peterson

BMI Project Number: 0A1.127685 Designed By: BCS Date: 6/18/2025

Rainfall Data

Frequency yr in 1 in 2 in 3

2 3.07 3.08 3.10

5 3.78 3.81 3.80

10 4.44 4.46 4.50

25 5.43 5.44 5.50

50 6.26 6.26 6.30

100 7.16 7.12 7.20

References

1 NOAA Atlas 14, Volume 8, Version 2 2 SUDAS Design 2025 Edition 3 24-hour rainfall depths by county from NEH Title 210 (Figure IA2-25)

Box indicates value selected.

The following rainfall data was used for the hydrology analysis of the site. Rainfall depths from three sources are shown, and the rainfall depths from the NEH Title 210 figure were used. MSE 3 was used for the rainfall distribution.

= .74 sq mi

24-hr

Surface-Drained DA = 475 ac

H:\HAMILTON_CO_IA\0A1127685\3_Design\C_Reports\Peterson Hydrology Report.xlsm Page 2

BMI Project Number: 0A1.127685 Designed By: BCS Date: 6/18/2025

Tributary Watershed Data

Watershed Area (ac) Area (sq. mi.) Tile/Surface Drained

Direct 103 0.16 Surface & Tile

South 43 0.07 Tile

Southwest 152 0.24 Surface & Tile

West 183 0.29 Surface & Tile

Northwest 14 0.02 Surface & Tile

Northeast 23 0.04 Surface & Tile

Surface Total 475 0.74

Tile Total 518 0.81

H:\HAMILTON_CO_IA\0A1127685\3_Design\C_Reports\Peterson Hydrology Report.xlsm Page 3

BMI Project Number: 0A1.127685 Designed By: BCS Date: 6/18/2025

Soil Portion Name1 HSG1 Cover Type and Hyd. Condition of W/S CN2 Product percent

Canisteo, Nicollet Loam, et al C, C/D Straight Row Crops, Good 96.2% 85 81.77

Clarion Loam, et al B Straight Row Crops, Good 3.8% 78 2.964

Total 100.0% 84.7

References 1 USDA - NRCS Soil Survey of Hamilton Co., Iowa.

2 USDA - NRCS Technical Release 55, Chapter 2, June 1986.

= .74 sq mi Runoff Curve Number Surface-Drained DA = 475 ac

H:\HAMILTON_CO_IA\0A1127685\3_Design\C_Reports\Peterson Hydrology Report.xlsm Page 4

BMI Project Number: 0A1.127685 Designed By: BCS Date: 6/18/2025

Stage-Storage

Contour Elev. Area Area Incremental

Volume Cumulative

Volume Volume

Above Weir

Allow for Aerated

Seditment

Temporar y Flood Storage

(sq ft) (Acres) (Ac-ft) (Ac-ft) (Ac-ft) (Ac-ft) (Ac-ft)

1169.50 268800 6.17 0.00 0.00

1170.00 278800 6.40 3.14 3.14

1170.50 284800 6.54 3.23 6.38 0.00 0.00 0.00

1171.00 292300 6.71 3.31 9.69 3.31 -0.20 3.51

1172.00 537600 12.34 9.53 19.22 12.84 -0.20 13.03

1173.00 724400 16.63 14.49 33.70 27.32 -0.20 27.52

1174.00 990700 22.74 19.69 53.39 47.01 -0.20 47.21

1175.00 1346900 30.92 26.83 80.22 73.84 -0.20 74.04

1176.00 1707400 39.20 35.06 115.28 108.90 -0.20 109.10

1177.00 1944300 44.63 41.92 157.19 150.82 -0.20 151.01

1178.00 2199900 50.50 47.57 204.76 198.39 -0.20 198.58

Storage at Normal Pool 6.38 Acre-feet storage at normal pool

Elevation of weir = 1170.50 area at normal pool

Storage at Overflow 53.39 Acre-feet

1174.00 0.98 feet

Notes:

= .74 sq mi

Surface-Drained DA = 475 ac

Average Depth =

Average Depth =Elevation =

Storage areas include final earthwork in pool area. Contour data is compiled from LiDAR, topographic survey, and proposed grading.

H:\HAMILTON_CO_IA\0A1127685\3_Design\C_Reports\Peterson Hydrology Report.xlsm Page 5

BMI Project Number: 0A1.127685 Designed By: BCS Date: 6/18/2025

Base Flow (cfs) 0.81 =1 csm

Base Flow Weir Height (ft) 0.16

Average Flow (cfs) 0.76 Based on StreamStats data

Average Flow Weir Height (ft) 0.16

Pool Elevation at 1 csm 1170.66

Pool Elevation at Average Flow 1170.66

Wetland Outlet Weir Capacities

The following parameters are used to design the combination v-notch and rectangular weir for the wetland outlet structure.

H:\HAMILTON_CO_IA\0A1127685\3_Design\C_Reports\Peterson Hydrology Report.xlsm Page 6

BMI Project Number: 0A1.127685 Designed By: BCS Date: 6/18/2025

Results Surface-Drained DA = 475 ac The following are based on surface flows and storm response. Discharge includes tile flow and overland flow.

= .74 sq mi

0100020003000400050006000700080009000

0.00 10.00 20.00 30.00 40.00 50.00 60.00

Discharge (cfs)

E le va ti o n

Pool Area (ac)

Pool Area-Elevation-Discharge Graph

Normal Pool

Pool Area (ac)

Discharge (cfs)

1173.00

1173.50

1174.00

1174.50

1175.00

1175.50

0 4 8 12 16 20 24

E le va ti o n

Duration (Hours)

Duration-Elevation Graph

5-Year

10-Year

25-year

100-year

H:\HAMILTON_CO_IA\0A1127685\3_Design\C_Reports\Peterson Hydrology Report.xlsm Page 7

BMI Project Number: 0A1.127685 Designed By: BCS Date: 6/18/2025

Results

1169.50 6.17 0 0 0

1170.00 6.40 0 0 0

1170.50 6.54 0 0 0

1171.00 6.71 4.51 0 4.51

1172.00 12.34 18.56 0 18.56

1173.00 16.63 19.89 0 19.89

1174.00 22.74 21.14 0 21.14

1175.00 30.92 22.31 172.92 195.23

1176.00 39.20 23.43 913.06 936.49

1177.00 44.63 24.5 3358.4 3382.9

1178.00 50.50 25.52 9208.44 9233.96

5-year 10-year 25-year 100-year Duration Elevation Duration Elevation Duration Elevation Duration Elevation

0 1174.07 0 1174.50 0 1174.88 0 1175.31 2 1174.06 2 1174.47 2 1174.80 2 1175.16 4 1174.04 4 1174.42 4 1174.65 4 1174.88 6 1174.01 6 1174.35 6 1174.52 6 1174.67 8 1173.96 8 1174.27 8 1174.41 8 1174.53

10 1173.90 10 1174.19 10 1174.31 10 1174.42 12 1173.82 12 1174.09 12 1174.20 12 1174.30 14 1173.72 14 1173.99 14 1174.09 14 1174.18 16 1173.62 16 1173.88 16 1173.98 16 1174.06 18 1173.50 18 1173.77 18 1173.87 18 1173.95 20 1173.39 20 1173.66 20 1173.75 20 1173.84 22 1173.27 22 1173.54 22 1173.63 22 1173.72 24 1173.15 24 1173.42 24 1173.51 24 1173.60

The Duration-Elevation table below shows the duration that the pool is at each listed elevation during the design storms. This is based on surface inflows during the design storms listed. The design for the wetland is based on tile flows, but the entire watershed is analyzed, including surface flows, to show that the proposed wetland does not have adverse impacts on surrounding properties during rainfall events.

Duration-Elevation Table

The Elevation-Discharge table below shows tile and surface outflows from the wetland for various elevations. The tile discharge is very small compared to the surface discharge at higher elevations.

Elevation Pool Area

(ac) Tile Discharge

(cfs) Surface

Discharge (cfs) Total Discharge

(cfs)

= .74 sq mi Surface-Drained DA = 475 ac

H:\HAMILTON_CO_IA\0A1127685\3_Design\C_Reports\Peterson Hydrology Report.xlsm Page 8

Page: 6

HydroCAD Output

Northwest Watershed

Northeast Watershed

West Watershed

Southwest Watershed

Direct Watershed

Wetland Pool

Borrow Pond

Tailwater

Routing Diagram for Peterson HydroCAD Prepared by Bolton & Menk, Inc, Printed 7/15/2025

Subcat Reach Pond Link

Peterson HydroCAD Printed 7/15/2025Prepared by Bolton & Menk, Inc

Rainfall Events Listing

Event# Event

Name

Storm Type Curve Mode Duration

(hours)

B/B Depth

(inches)

AMC

1 2-yr MSE 24-hr 3 Default 24.00 1 3.10 2

2 5-yr MSE 24-hr 3 Default 24.00 1 3.80 2

3 10-yr MSE 24-hr 3 Default 24.00 1 4.50 2

4 25-yr MSE 24-hr 3 Default 24.00 1 5.50 2

5 50-yr MSE 24-hr 3 Default 24.00 1 6.30 2

6 100-yr MSE 24-hr 3 Default 24.00 1 7.20 2

Area Listing (all nodes)

Area

(acres)

CN Description

(subcatchment-numbers)

475.000 85 Row crops, straight row, Good, HSG C (5S, 6S, 7S, 8S, 9S)

475.000 85 TOTAL AREA

Soil Listing (all nodes)

Area

(acres)

Soil

Group

Subcatchment

Numbers

0.000 HSG A

0.000 HSG B

475.000 HSG C 5S, 6S, 7S, 8S, 9S

0.000 HSG D

0.000 Other

475.000 TOTAL AREA

Ground Covers (all nodes)

HSG-A

(acres)

HSG-B

(acres)

HSG-C

(acres)

HSG-D

(acres)

Other

(acres)

Total

(acres)

Ground

Cover

Subcatchment

Numbers

0.000 0.000 475.000 0.000 0.000 475.000 Row crops, straight row, Good 5S, 6S, 7S, 8S, 9S

0.000 0.000 475.000 0.000 0.000 475.000 TOTAL AREA

Pipe Listing (all nodes)

Line# Node

Number

In-Invert

(feet)

Out-Invert

(feet)

Length

(feet)

Slope

(ft/ft) n Width

(inches)

Diam/Height

(inches)

Inside-Fill

(inches)

Node

Name

1 1P 1,164.00 1,163.76 100.0 0.0024 0.015 0.0 18.0 0.0

MSE 24-hr 3 2-yr Rainfall=3.10"Peterson HydroCAD

Time span=5.00-96.00 hrs, dt=0.05 hrs, 1821 points x 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN

Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method

Runoff Area=14.000 ac 0.00% Impervious Runoff Depth=1.67"Subcatchment 5S: Northwest Watershed Flow Length=1,279' Tc=48.4 min CN=85 Runoff=15.60 cfs 1.951 af

Runoff Area=23.000 ac 0.00% Impervious Runoff Depth=1.67"Subcatchment 6S: Northeast Watershed Flow Length=1,402' Tc=36.1 min CN=85 Runoff=30.84 cfs 3.206 af

Runoff Area=183.000 ac 0.00% Impervious Runoff Depth=1.67"Subcatchment 7S: West Watershed Flow Length=6,267' Tc=181.2 min CN=85 Runoff=78.29 cfs 25.507 af

Runoff Area=152.000 ac 0.00% Impervious Runoff Depth=1.67"Subcatchment 8S: Southwest Watershed Flow Length=4,051' Tc=117.6 min CN=85 Runoff=90.90 cfs 21.186 af

Runoff Area=103.000 ac 0.00% Impervious Runoff Depth=1.67"Subcatchment 9S: Direct Watershed Flow Length=1,993' Tc=59.2 min CN=85 Runoff=100.70 cfs 14.356 af

Peak Elev=1,173.29' Storage=38.635 af Inflow=154.26 cfs 65.629 afPond 1P: Wetland Pool Primary=20.25 cfs 64.965 af Secondary=0.00 cfs 0.000 af Outflow=20.25 cfs 64.965 af

Peak Elev=1,173.30' Storage=22.218 af Inflow=82.76 cfs 30.664 afPond 2P: Borrow Pond Outflow=40.86 cfs 30.086 af

Inflow=20.25 cfs 64.965 afLink 3L: Tailwater Primary=20.25 cfs 64.965 af

Total Runoff Area = 475.000 ac Runoff Volume = 66.207 af Average Runoff Depth = 1.67" 100.00% Pervious = 475.000 ac 0.00% Impervious = 0.000 ac

Summary for Subcatchment 5S: Northwest Watershed

Runoff = 15.60 cfs @ 12.67 hrs, Volume= 1.951 af, Depth= 1.67" Routed to Pond 2P : Borrow Pond

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 2-yr Rainfall=3.10"

Area (ac) CN Description

14.000 85 Row crops, straight row, Good, HSG C

14.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

37.4 1,179 0.0034 0.52 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

48.4 1,279 Total

Subcatchment 5S: Northwest Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

F lo w

(c fs

MSE 24-hr 3 2-yr Rainfall=3.10"

Runoff Area=14.000 ac Runoff Volume=1.951 af

Runoff Depth=1.67" Flow Length=1,279'

Tc=48.4 min

CN=85

15.60 cfs

Summary for Subcatchment 6S: Northeast Watershed

Runoff = 30.84 cfs @ 12.51 hrs, Volume= 3.206 af, Depth= 1.67" Routed to Pond 2P : Borrow Pond

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 2-yr Rainfall=3.10"

Area (ac) CN Description

23.000 85 Row crops, straight row, Good, HSG C

23.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

25.1 1,302 0.0092 0.86 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

36.1 1,402 Total

Subcatchment 6S: Northeast Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 3 2-yr Rainfall=3.10"

Runoff Area=23.000 ac Runoff Volume=3.206 af

Runoff Depth=1.67" Flow Length=1,402'

Tc=36.1 min

30.84 cfs

Summary for Subcatchment 7S: West Watershed

Runoff = 78.29 cfs @ 14.33 hrs, Volume= 25.507 af, Depth= 1.67" Routed to Pond 2P : Borrow Pond

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 2-yr Rainfall=3.10"

Area (ac) CN Description

183.000 85 Row crops, straight row, Good, HSG C

183.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

170.2 6,167 0.0045 0.60 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

181.2 6,267 Total

Subcatchment 7S: West Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 3 2-yr Rainfall=3.10"

Runoff Area=183.000 ac Runoff Volume=25.507 af

Runoff Depth=1.67" Flow Length=6,267'

Tc=181.2 min

78.29 cfs

Summary for Subcatchment 8S: Southwest Watershed

Runoff = 90.90 cfs @ 13.61 hrs, Volume= 21.186 af, Depth= 1.67" Routed to Pond 1P : Wetland Pool

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 2-yr Rainfall=3.10"

Area (ac) CN Description

152.000 85 Row crops, straight row, Good, HSG C

152.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

70.0 2,037 0.0029 0.48 Shallow Concentrated Flow, middle (even)

Cultivated Straight Rows Kv= 9.0 fps

36.6 1,914 0.0094 0.87 Shallow Concentrated Flow, east (steep)

Cultivated Straight Rows Kv= 9.0 fps

117.6 4,051 Total

Subcatchment 8S: Southwest Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 3 2-yr Rainfall=3.10"

Runoff Area=152.000 ac Runoff Volume=21.186 af

Runoff Depth=1.67" Flow Length=4,051'

Tc=117.6 min

90.90 cfs

Summary for Subcatchment 9S: Direct Watershed

Runoff = 100.70 cfs @ 12.81 hrs, Volume= 14.356 af, Depth= 1.67" Routed to Pond 1P : Wetland Pool

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 2-yr Rainfall=3.10"

Area (ac) CN Description

103.000 85 Row crops, straight row, Good, HSG C

103.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

48.2 1,893 0.0053 0.66 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

59.2 1,993 Total

Subcatchment 9S: Direct Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 3 2-yr Rainfall=3.10"

Runoff Area=103.000 ac Runoff Volume=14.356 af

Runoff Depth=1.67" Flow Length=1,993'

Tc=59.2 min

100.70 cfs

Summary for Pond 1P: Wetland Pool

[80] Warning: Exceeded Pond 2P by 0.45' @ 13.40 hrs (58.57 cfs 6.723 af)

Inflow Area = 475.000 ac, 0.00% Impervious, Inflow Depth > 1.66" for 2-yr event Inflow = 154.26 cfs @ 13.03 hrs, Volume= 65.629 af Outflow = 20.25 cfs @ 19.78 hrs, Volume= 64.965 af, Atten= 87%, Lag= 404.6 min Primary = 20.25 cfs @ 19.78 hrs, Volume= 64.965 af Routed to Link 3L : Tailwater Secondary = 0.00 cfs @ 5.00 hrs, Volume= 0.000 af

Routing by Dyn-Stor-Ind method, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs / 3 Starting Elev= 1,170.50' Surf.Area= 6.403 ac Storage= 6.341 af Peak Elev= 1,173.29' @ 19.78 hrs Surf.Area= 18.377 ac Storage= 38.635 af (32.294 af above start)

Plug-Flow detention time= 1,097.8 min calculated for 58.591 af (89% of inflow) Center-of-Mass det. time= 734.7 min ( 2,070.2 - 1,335.5 )

Volume Invert Avail.Storage Storage Description #1 1,169.50' 204.694 af Custom Stage Data (Prismatic) Listed below (Recalc)

Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet)

1,169.50 6.171 0.000 0.000 1,170.00 6.396 3.142 3.142 1,170.50 6.403 3.200 6.341 1,171.00 6.710 3.278 9.620 1,172.00 12.342 9.526 19.146 1,173.00 16.630 14.486 33.632 1,174.00 22.743 19.686 53.318 1,175.00 30.921 26.832 80.150 1,176.00 39.197 35.059 115.209 1,177.00 44.635 41.916 157.125 1,178.00 50.503 47.569 204.694

Device Routing Invert Outlet Devices #1 Primary 1,164.00' 18.0" Round Culvert

L= 100.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 1,164.00' / 1,163.76' S= 0.0024 '/' Cc= 0.900 n= 0.015, Flow Area= 1.77 sf

#2 Device 1 1,170.50' 4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Secondary 1,174.00' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)

Head (feet) 0.00 1.00 2.00 3.00 4.00 Width (feet) 10.00 117.00 245.00 1,020.00 1,213.00

Primary OutFlow Max=20.25 cfs @ 19.78 hrs HW=1,173.29' TW=1,165.26' (Dynamic Tailwater) 1=Culvert (Barrel Controls 20.25 cfs @ 11.46 fps)

2=Sharp-Crested Rectangular Weir (Passes 20.25 cfs of 52.35 cfs potential flow)

Secondary OutFlow Max=0.00 cfs @ 5.00 hrs HW=1,170.50' (Free Discharge) 3=Custom Weir/Orifice ( Controls 0.00 cfs)

Pond 1P: Wetland Pool

Inflow Outflow Primary Secondary

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=475.000 ac Peak Elev=1,173.29'

Storage=38.635 af

154.26 cfs

20.25 cfs20.25 cfs

0.00 cfs

Pond 1P: Wetland Pool

Total Primary Secondary

Stage-Discharge

Discharge (cfs) 9,0008,0007,0006,0005,0004,0003,0002,0001,0000

E le va ti o n

(f ee t)

1,178

1,177

1,176

1,175

1,174

1,173

1,172

1,171

1,170

Sharp-Crested Rectangular Weir

Custom Weir/Orifice

Pond 1P: Wetland Pool

Surface Storage

Stage-Area-Storage

Storage (acre-feet) 200180160140120100806040200

Surface/Horizontal/Wetted Area (acres) 50454035302520151050

E le va ti t)

1,178

1,177

1,176

1,175

1,174

1,173

1,172

1,171

1,170

Starting Elevation

Custom Stage Data

Summary for Pond 2P: Borrow Pond

[95] Warning: Outlet Device #2 rise exceeded

Inflow Area = 220.000 ac, 0.00% Impervious, Inflow Depth = 1.67" for 2-yr event Inflow = 82.76 cfs @ 14.31 hrs, Volume= 30.664 af Outflow = 40.86 cfs @ 15.27 hrs, Volume= 30.086 af, Atten= 51%, Lag= 57.5 min Primary = 40.86 cfs @ 15.27 hrs, Volume= 30.086 af Routed to Pond 1P : Wetland Pool

Routing by Dyn-Stor-Ind method, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs / 3 Starting Elev= 1,170.50' Surf.Area= 5.513 ac Storage= 5.457 af Peak Elev= 1,173.30' @ 19.52 hrs Surf.Area= 6.719 ac Storage= 22.218 af (16.761 af above start)

Plug-Flow detention time= 1,204.7 min calculated for 24.630 af (80% of inflow) Center-of-Mass det. time= 924.0 min ( 1,867.3 - 943.4 )

Volume Invert Avail.Storage Storage Description #1 1,169.50' 62.467 af Custom Stage Data (Prismatic) Listed below (Recalc)

Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet)

1,169.50 5.400 0.000 0.000 1,171.00 5.570 8.228 8.228 1,172.00 5.980 5.775 14.003 1,173.00 6.520 6.250 20.252 1,174.00 7.190 6.855 27.108 1,175.00 8.110 7.650 34.758 1,176.00 8.870 8.490 43.248 1,177.00 9.580 9.225 52.473 1,178.00 10.410 9.995 62.467

Device Routing Invert Outlet Devices #1 Primary 1,173.50' 550.0' long x 10.0' breadth Broad-Crested Rectangular Weir

Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64

#2 Primary 1,170.50' Custom Weir/Orifice, Cv= 2.62 (C= 3.28) Head (feet) 0.00 0.50 1.00 1.50 Width (feet) 10.00 13.00 16.00 19.00

Primary OutFlow Max=40.85 cfs @ 15.27 hrs HW=1,173.01' TW=1,172.86' (Dynamic Tailwater) 1=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 2=Custom Weir/Orifice (Orifice Controls 40.85 cfs @ 1.88 fps)

Pond 2P: Borrow Pond

Inflow Primary

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=220.000 ac Peak Elev=1,173.30'

Storage=22.218 af

82.76 cfs

40.86 cfs

Pond 2P: Borrow Pond

Primary

Stage-Discharge

Discharge (cfs) 14,00012,00010,0008,0006,0004,0002,0000

E le va ti t)

1,178

1,177

1,176

1,175

1,174

1,173

1,172

1,171

1,170

Initial Tailwater

Broad-Crested Rectangular Weir

Pond 2P: Borrow Pond

Surface Storage

Stage-Area-Storage

Storage (acre-feet) 605550454035302520151050

Surface/Horizontal/Wetted Area (acres) 109876543210

E le va ti t)

1,178

1,177

1,176

1,175

1,174

1,173

1,172

1,171

1,170

Summary for Link 3L: Tailwater

Inflow Area = 475.000 ac, 0.00% Impervious, Inflow Depth > 1.64" for 2-yr event Inflow = 20.25 cfs @ 19.78 hrs, Volume= 64.965 af Primary = 20.25 cfs @ 19.78 hrs, Volume= 64.965 af, Atten= 0%, Lag= 0.0 min

Primary outflow = Inflow, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs

Fixed water surface Elevation= 1,165.26'

Link 3L: Tailwater

Inflow Primary

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=475.000 ac

20.25 cfs20.25 cfs

MSE 24-hr 3 5-yr Rainfall=3.80"Peterson HydroCAD

Time span=5.00-96.00 hrs, dt=0.05 hrs, 1821 points x 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN

Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method

Runoff Area=14.000 ac 0.00% Impervious Runoff Depth=2.28"Subcatchment 5S: Northwest Watershed Flow Length=1,279' Tc=48.4 min CN=85 Runoff=21.31 cfs 2.660 af

Runoff Area=23.000 ac 0.00% Impervious Runoff Depth=2.28"Subcatchment 6S: Northeast Watershed Flow Length=1,402' Tc=36.1 min CN=85 Runoff=42.07 cfs 4.370 af

Runoff Area=183.000 ac 0.00% Impervious Runoff Depth=2.28"Subcatchment 7S: West Watershed Flow Length=6,267' Tc=181.2 min CN=85 Runoff=107.72 cfs 34.768 af

Runoff Area=152.000 ac 0.00% Impervious Runoff Depth=2.28"Subcatchment 8S: Southwest Watershed Flow Length=4,051' Tc=117.6 min CN=85 Runoff=124.48 cfs 28.879 af

Runoff Area=103.000 ac 0.00% Impervious Runoff Depth=2.28"Subcatchment 9S: Direct Watershed Flow Length=1,993' Tc=59.2 min CN=85 Runoff=137.65 cfs 19.569 af

Peak Elev=1,174.07' Storage=54.901 af Inflow=212.10 cfs 89.367 afPond 1P: Wetland Pool Primary=21.22 cfs 88.109 af Secondary=0.76 cfs 0.246 af Outflow=21.98 cfs 88.355 af

Peak Elev=1,174.07' Storage=27.604 af Inflow=113.47 cfs 41.798 afPond 2P: Borrow Pond Outflow=89.10 cfs 40.920 af

Inflow=21.22 cfs 88.109 afLink 3L: Tailwater Primary=21.22 cfs 88.109 af

Total Runoff Area = 475.000 ac Runoff Volume = 90.245 af Average Runoff Depth = 2.28"

Summary for Subcatchment 5S: Northwest Watershed

Runoff = 21.31 cfs @ 12.66 hrs, Volume= 2.660 af, Depth= 2.28" Routed to Pond 2P : Borrow Pond

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 5-yr Rainfall=3.80"

Area (ac) CN Description

14.000 85 Row crops, straight row, Good, HSG C

14.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

37.4 1,179 0.0034 0.52 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

48.4 1,279 Total

Subcatchment 5S: Northwest Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 3 5-yr Rainfall=3.80"

Runoff Area=14.000 ac Runoff Volume=2.660 af

Runoff Depth=2.28" Flow Length=1,279'

Tc=48.4 min

21.31 cfs

Summary for Subcatchment 6S: Northeast Watershed

Runoff = 42.07 cfs @ 12.50 hrs, Volume= 4.370 af, Depth= 2.28" Routed to Pond 2P : Borrow Pond

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 5-yr Rainfall=3.80"

Area (ac) CN Description

23.000 85 Row crops, straight row, Good, HSG C

23.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

25.1 1,302 0.0092 0.86 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

36.1 1,402 Total

Subcatchment 6S: Northeast Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 3 5-yr Rainfall=3.80"

Runoff Area=23.000 ac Runoff Volume=4.370 af

Runoff Depth=2.28" Flow Length=1,402'

Tc=36.1 min

42.07 cfs

Summary for Subcatchment 7S: West Watershed

Runoff = 107.72 cfs @ 14.32 hrs, Volume= 34.768 af, Depth= 2.28" Routed to Pond 2P : Borrow Pond

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 5-yr Rainfall=3.80"

Area (ac) CN Description

183.000 85 Row crops, straight row, Good, HSG C

183.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

170.2 6,167 0.0045 0.60 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

181.2 6,267 Total

Subcatchment 7S: West Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 3 5-yr Rainfall=3.80"

Runoff Area=183.000 ac Runoff Volume=34.768 af

Runoff Depth=2.28" Flow Length=6,267'

Tc=181.2 min

107.72 cfs

Summary for Subcatchment 8S: Southwest Watershed

Runoff = 124.48 cfs @ 13.59 hrs, Volume= 28.879 af, Depth= 2.28" Routed to Pond 1P : Wetland Pool

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 5-yr Rainfall=3.80"

Area (ac) CN Description

152.000 85 Row crops, straight row, Good, HSG C

152.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

70.0 2,037 0.0029 0.48 Shallow Concentrated Flow, middle (even)

Cultivated Straight Rows Kv= 9.0 fps

36.6 1,914 0.0094 0.87 Shallow Concentrated Flow, east (steep)

Cultivated Straight Rows Kv= 9.0 fps

117.6 4,051 Total

Subcatchment 8S: Southwest Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 3 5-yr Rainfall=3.80"

Runoff Area=152.000 ac Runoff Volume=28.879 af

Runoff Depth=2.28" Flow Length=4,051'

Tc=117.6 min

124.48 cfs

Summary for Subcatchment 9S: Direct Watershed

Runoff = 137.65 cfs @ 12.80 hrs, Volume= 19.569 af, Depth= 2.28" Routed to Pond 1P : Wetland Pool

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 5-yr Rainfall=3.80"

Area (ac) CN Description

103.000 85 Row crops, straight row, Good, HSG C

103.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

48.2 1,893 0.0053 0.66 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

59.2 1,993 Total

Subcatchment 9S: Direct Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 3 5-yr Rainfall=3.80"

Runoff Area=103.000 ac Runoff Volume=19.569 af

Runoff Depth=2.28" Flow Length=1,993'

Tc=59.2 min

137.65 cfs

Summary for Pond 1P: Wetland Pool

[80] Warning: Exceeded Pond 2P by 0.43' @ 13.30 hrs (68.49 cfs 16.254 af)

Inflow Area = 475.000 ac, 0.00% Impervious, Inflow Depth > 2.26" for 5-yr event Inflow = 212.10 cfs @ 13.02 hrs, Volume= 89.367 af Outflow = 21.98 cfs @ 20.62 hrs, Volume= 88.355 af, Atten= 90%, Lag= 456.4 min Primary = 21.22 cfs @ 20.62 hrs, Volume= 88.109 af Routed to Link 3L : Tailwater Secondary = 0.76 cfs @ 20.62 hrs, Volume= 0.246 af

Routing by Dyn-Stor-Ind method, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs / 3 Starting Elev= 1,170.50' Surf.Area= 6.403 ac Storage= 6.341 af Peak Elev= 1,174.07' @ 20.62 hrs Surf.Area= 23.305 ac Storage= 54.901 af (48.560 af above start)

Plug-Flow detention time= 1,324.9 min calculated for 81.968 af (92% of inflow) Center-of-Mass det. time= 980.0 min ( 2,381.9 - 1,401.9 )

Volume Invert Avail.Storage Storage Description #1 1,169.50' 204.694 af Custom Stage Data (Prismatic) Listed below (Recalc)

Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet)

Device Routing Invert Outlet Devices #1 Primary 1,164.00' 18.0" Round Culvert

L= 100.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 1,164.00' / 1,163.76' S= 0.0024 '/' Cc= 0.900 n= 0.015, Flow Area= 1.77 sf

#2 Device 1 1,170.50' 4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Secondary 1,174.00' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)

Head (feet) 0.00 1.00 2.00 3.00 4.00 Width (feet) 10.00 117.00 245.00 1,020.00 1,213.00

Primary OutFlow Max=21.22 cfs @ 20.62 hrs HW=1,174.07' TW=1,165.26' (Dynamic Tailwater) 1=Culvert (Barrel Controls 21.22 cfs @ 12.01 fps)

2=Sharp-Crested Rectangular Weir (Passes 21.22 cfs of 72.45 cfs potential flow)

Secondary OutFlow Max=0.76 cfs @ 20.62 hrs HW=1,174.07' (Free Discharge) 3=Custom Weir/Orifice (Weir Controls 0.76 cfs @ 0.81 fps)

Pond 1P: Wetland Pool

Inflow Outflow Primary Secondary

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=475.000 ac Peak Elev=1,174.07'

Storage=54.901 af

212.10 cfs

21.98 cfs21.22 cfs

0.76 cfs

Pond 1P: Wetland Pool

Total Primary Secondary

Stage-Discharge

Discharge (cfs) 9,0008,0007,0006,0005,0004,0003,0002,0001,0000

E le va ti t)

1,178

1,177

1,176

1,175

1,174

1,173

1,172

1,171

1,170

Pond 1P: Wetland Pool

Surface Storage

Stage-Area-Storage

Storage (acre-feet) 200180160140120100806040200

Surface/Horizontal/Wetted Area (acres) 50454035302520151050

E le va ti t)

1,178

1,177

1,176

1,175

1,174

1,173

1,172

1,171

1,170

Summary for Pond 2P: Borrow Pond

[95] Warning: Outlet Device #2 rise exceeded

Inflow Area = 220.000 ac, 0.00% Impervious, Inflow Depth = 2.28" for 5-yr event Inflow = 113.47 cfs @ 14.30 hrs, Volume= 41.798 af Outflow = 89.10 cfs @ 15.10 hrs, Volume= 40.920 af, Atten= 21%, Lag= 47.9 min Primary = 89.10 cfs @ 15.10 hrs, Volume= 40.920 af Routed to Pond 1P : Wetland Pool

Routing by Dyn-Stor-Ind method, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs / 3 Starting Elev= 1,170.50' Surf.Area= 5.513 ac Storage= 5.457 af Peak Elev= 1,174.07' @ 20.63 hrs Surf.Area= 7.253 ac Storage= 27.604 af (22.147 af above start)

Plug-Flow detention time= 1,317.1 min calculated for 35.463 af (85% of inflow) Center-of-Mass det. time= 1,083.8 min ( 2,020.9 - 937.1 )

Volume Invert Avail.Storage Storage Description #1 1,169.50' 62.467 af Custom Stage Data (Prismatic) Listed below (Recalc)

Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet)

Device Routing Invert Outlet Devices #1 Primary 1,173.50' 550.0' long x 10.0' breadth Broad-Crested Rectangular Weir

Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64

#2 Primary 1,170.50' Custom Weir/Orifice, Cv= 2.62 (C= 3.28) Head (feet) 0.00 0.50 1.00 1.50 Width (feet) 10.00 13.00 16.00 19.00

Primary OutFlow Max=89.07 cfs @ 15.10 hrs HW=1,173.61' TW=1,173.47' (Dynamic Tailwater) 1=Broad-Crested Rectangular Weir (Weir Controls 49.03 cfs @ 0.82 fps) 2=Custom Weir/Orifice (Orifice Controls 40.04 cfs @ 1.84 fps)

Pond 2P: Borrow Pond

Inflow Primary

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=220.000 ac Peak Elev=1,174.07'

Storage=27.604 af

113.47 cfs

89.10 cfs

Pond 2P: Borrow Pond

Primary

Stage-Discharge

Discharge (cfs) 14,00012,00010,0008,0006,0004,0002,0000

E le va ti t)

1,178

1,177

1,176

1,175

1,174

1,173

1,172

1,171

1,170

Initial Tailwater

Pond 2P: Borrow Pond

Surface Storage

Stage-Area-Storage

Storage (acre-feet) 605550454035302520151050

Surface/Horizontal/Wetted Area (acres) 109876543210

E le va ti t)

1,178

1,177

1,176

1,175

1,174

1,173

1,172

1,171

1,170

Summary for Link 3L: Tailwater

Inflow Area = 475.000 ac, 0.00% Impervious, Inflow Depth > 2.23" for 5-yr event Inflow = 21.22 cfs @ 20.62 hrs, Volume= 88.109 af Primary = 21.22 cfs @ 20.62 hrs, Volume= 88.109 af, Atten= 0%, Lag= 0.0 min

Primary outflow = Inflow, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs

Fixed water surface Elevation= 1,165.26'

Link 3L: Tailwater

Inflow Primary

Hydrograph

Time (hours) 9590858075706560555045403530252015105

21.22 cfs21.22 cfs

MSE 24-hr 3 10-yr Rainfall=4.50"Peterson HydroCAD

Time span=5.00-96.00 hrs, dt=0.05 hrs, 1821 points x 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN

Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method

Runoff Area=14.000 ac 0.00% Impervious Runoff Depth=2.91"Subcatchment 5S: Northwest Watershed Flow Length=1,279' Tc=48.4 min CN=85 Runoff=27.14 cfs 3.394 af

Runoff Area=23.000 ac 0.00% Impervious Runoff Depth=2.91"Subcatchment 6S: Northeast Watershed Flow Length=1,402' Tc=36.1 min CN=85 Runoff=53.54 cfs 5.576 af

Runoff Area=183.000 ac 0.00% Impervious Runoff Depth=2.91"Subcatchment 7S: West Watershed Flow Length=6,267' Tc=181.2 min CN=85 Runoff=137.95 cfs 44.364 af

Runoff Area=152.000 ac 0.00% Impervious Runoff Depth=2.91"Subcatchment 8S: Southwest Watershed Flow Length=4,051' Tc=117.6 min CN=85 Runoff=158.95 cfs 36.849 af

Runoff Area=103.000 ac 0.00% Impervious Runoff Depth=2.91"Subcatchment 9S: Direct Watershed Flow Length=1,993' Tc=59.2 min CN=85 Runoff=175.47 cfs 24.970 af

Peak Elev=1,174.50' Storage=65.689 af Inflow=271.67 cfs 114.149 afPond 1P: Wetland Pool Primary=21.73 cfs 95.098 af Secondary=36.22 cfs 17.893 af Outflow=57.95 cfs 112.991 af

Peak Elev=1,174.50' Storage=30.811 af Inflow=145.03 cfs 53.334 afPond 2P: Borrow Pond Outflow=105.57 cfs 52.330 af

Inflow=21.73 cfs 95.098 afLink 3L: Tailwater Primary=21.73 cfs 95.098 af

Total Runoff Area = 475.000 ac Runoff Volume = 115.153 af Average Runoff Depth = 2.91"

Summary for Subcatchment 5S: Northwest Watershed

Runoff = 27.14 cfs @ 12.66 hrs, Volume= 3.394 af, Depth= 2.91" Routed to Pond 2P : Borrow Pond

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 10-yr Rainfall=4.50"

Area (ac) CN Description

14.000 85 Row crops, straight row, Good, HSG C

14.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

37.4 1,179 0.0034 0.52 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

48.4 1,279 Total

Subcatchment 5S: Northwest Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 3 10-yr Rainfall=4.50"

Runoff Area=14.000 ac Runoff Volume=3.394 af

Runoff Depth=2.91" Flow Length=1,279'

Tc=48.4 min

27.14 cfs

Summary for Subcatchment 6S: Northeast Watershed

Runoff = 53.54 cfs @ 12.50 hrs, Volume= 5.576 af, Depth= 2.91" Routed to Pond 2P : Borrow Pond

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 10-yr Rainfall=4.50"

Area (ac) CN Description

23.000 85 Row crops, straight row, Good, HSG C

23.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

25.1 1,302 0.0092 0.86 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

36.1 1,402 Total

Subcatchment 6S: Northeast Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 3 10-yr Rainfall=4.50"

Runoff Area=23.000 ac Runoff Volume=5.576 af

Runoff Depth=2.91" Flow Length=1,402'

Tc=36.1 min

53.54 cfs

Summary for Subcatchment 7S: West Watershed

Runoff = 137.95 cfs @ 14.31 hrs, Volume= 44.364 af, Depth= 2.91" Routed to Pond 2P : Borrow Pond

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 10-yr Rainfall=4.50"

Area (ac) CN Description

183.000 85 Row crops, straight row, Good, HSG C

183.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

170.2 6,167 0.0045 0.60 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

181.2 6,267 Total

Subcatchment 7S: West Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 3 10-yr Rainfall=4.50"

Runoff Area=183.000 ac Runoff Volume=44.364 af

Runoff Depth=2.91" Flow Length=6,267'

Tc=181.2 min

137.95 cfs

Summary for Subcatchment 8S: Southwest Watershed

Runoff = 158.95 cfs @ 13.58 hrs, Volume= 36.849 af, Depth= 2.91" Routed to Pond 1P : Wetland Pool

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 10-yr Rainfall=4.50"

Area (ac) CN Description

152.000 85 Row crops, straight row, Good, HSG C

152.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

70.0 2,037 0.0029 0.48 Shallow Concentrated Flow, middle (even)

Cultivated Straight Rows Kv= 9.0 fps

36.6 1,914 0.0094 0.87 Shallow Concentrated Flow, east (steep)

Cultivated Straight Rows Kv= 9.0 fps

117.6 4,051 Total

Subcatchment 8S: Southwest Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 3 10-yr Rainfall=4.50"

Runoff Area=152.000 ac Runoff Volume=36.849 af

Runoff Depth=2.91" Flow Length=4,051'

Tc=117.6 min

158.95 cfs

Summary for Subcatchment 9S: Direct Watershed

Runoff = 175.47 cfs @ 12.79 hrs, Volume= 24.970 af, Depth= 2.91" Routed to Pond 1P : Wetland Pool

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 3 10-yr Rainfall=4.50"

Area (ac) CN Description

103.000 85 Row crops, straight row, Good, HSG C

103.000 100.00% Pervious Area

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

11.0 100 0.0200 0.15 Sheet Flow, Cultivated: Residue>20% n= 0.170 P2= 3.10"

48.2 1,893 0.0053 0.66 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

59.2 1,993 Total

Subcatchment 9S: Direct Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 3 10-yr Rainfall=4.50"

Runoff Area=103.000 ac Runoff Volume=24.970 af

Runoff Depth=2.91" Flow Length=1,993'

Tc=59.2 min

175.47 cfs

Summary for Pond 1P: Wetland Pool

[80] Warning: Exceeded Pond 2P by 0.38' @ 13.25 hrs (65.60 cfs 21.729 af)

Inflow Area = 475.000 ac, 0.00% Impervious, Inflow Depth > 2.88" for 10-yr event Inflow = 271.67 cfs @ 13.00 hrs, Volume= 114.149 af Outflow = 57.95 cfs @ 17.56 hrs, Volume= 112.991 af, Atten= 79%, Lag= 273.6 min Primary = 21.73 cfs @ 17.56 hrs, Volume= 95.098 af Routed to Link 3L : Tailwater Secondary = 36.22 cfs @ 17.56 hrs, Volume= 17.893 af

Routing by Dyn-Stor-Ind method, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs / 3 Starting Elev= 1,170.50' Surf.Area= 6.403 ac Storage= 6.341 af Peak Elev= 1,174.50' @ 17.56 hrs Surf.Area= 26.825 ac Storage= 65.689 af (59.348 af above start)

Plug-Flow detention time= 1,194.5 min calculated for 106.649 af (93% of inflow) Center-of-Mass det. time= 915.8 min ( 2,260.6 - 1,344.8 )

Volume Invert Avail.Storage Storage Description #1 1,169.50' 204.694 af Custom Stage Data (Prismatic) Listed below (Recalc)

Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet)

Device Routing Invert Outlet Devices #1 Primary 1,164.00' 18.0" Round Culvert

L= 100.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 1,164.00' / 1,163.76' S= 0.0024 '/' Cc= 0.900 n= 0.015, Flow Area= 1.77 sf

#2 Device 1 1,170.50' 4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Secondary 1,174.00' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)

Head (feet) 0.00 1.00 2.00 3.00 4.00 Width (feet) 10.00 117.00 245.00 1,020.00 1,213.00

Primary OutFlow Max=21.73 cfs @ 17.56 hrs HW=1,174.50' TW=1,165.26' (Dynamic Tailwater) 1=Culvert (Barrel Controls 21.73 cfs @ 12.30 fps)

2=Sharp-Crested Rectangular Weir (Passes 21.73 cfs of 83.69 cfs potential flow)

Secondary OutFlow Max=36.22 cfs @ 17.56 hrs HW=1,174.50' (Free Discharge) 3=Custom Weir/Orifice (Weir Controls 36.22 cfs @ 1.98 fps)

Pond 1P: Wetland Pool

Inflow Outflow Primary Secondary

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=475.000 ac Peak Elev=1,174.50'

Storage=65.689 af

271.67 cfs

57.95 cfs

21.73 cfs

36.22 cfs

Pond 1P: Wetland Pool

Total Primary Secondary

Stage-Discharge

Discharge (cfs) 9,0008,0007,0006,0005,0004,0003,0002,0001,0000

E le va ti t)

1,178

1,177

1,176

1,175

1,174

1,173

1,172

1,171

1,170

Pond 1P: Wetland Pool

Surface Storage

Stage-Area-Storage

Storage (acre-feet) 200180160140120100806040200

Surface/Horizontal/Wetted Area (acres) 50454035302520151050

E le va ti t)

1,178

1,177

1,176

1,175

1,174

1,173

1,172

1,171

1,170

Summary for Pond 2P: Borrow Pond

[95] Warning: Outlet Device #2 rise exceeded

Inflow Area = 220.000 ac, 0.00% Impervious, Inflow Depth = 2.91" for 10-yr event Inflow = 145.03 cfs @ 14.30 hrs, Volume= 53.334 af Outflow = 105.57 cfs @ 14.34 hrs, Volume= 52.330 af, Atten= 27%, Lag= 2.3 min Primary = 105.57 cfs @ 14.34 hrs, Volume= 52.330 af Routed to Pond 1P : Wetland Pool

Routing by Dyn-Stor-Ind method, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs / 3 Starting Elev= 1,170.50' Surf.Area= 5.513 ac Storage= 5.457 af Peak Elev= 1,174.50' @ 17.56 hrs Surf.Area= 7.649 ac Storage= 30.811 af (25.355 af above start)

Plug-Flow detention time= 1,139.9 min calculated for 46.874 af (88% of inflow) Center-of-Mass det. time= 968.5 min ( 1,900.8 - 932.2 )

Volume Invert Avail.Storage Storage Description #1 1,169.50' 62.467 af Custom Stage Data (Prismatic) Listed below (Recalc)

Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet)

1,169.50 5.400 0.000 0.000 1,171.00 5.570 8.228 8.228 1,172.00 5.980 5.775 14.003 1,173.00 6.520 6.250 20.252 1,174.00 7.190 6.855 27.108 1,175.00 8.110 7.650 34.758 1,176.00 8.870…

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