Design Report.pdf

PDF 6 MB Posted Sep 27, 2026

Attached to: 26-11 Cla953734C (Clay) RFB
Solicitation number: 26-11 Cla953734C (Clay)
Issued by: Clinton County, Iowa

About this file

Written by GovTribe AI · Sep 28, 2026

This is an engineering design report prepared by Bolton & Menk, Inc. for the Iowa Department of Agriculture and Land Stewardship (IDALS) documenting the design of the Kracht Water Quality Wetland in Clay County, Iowa. The project involves the construction of a wetland system on the Kracht property near Rossie, Iowa, designed to provide nutrient reduction benefits to the watershed of Drainage District #103. The constructed wetland will convert nitrates to nitrogen gas through natural processes and capture sediment with phosphorus as water passes through the facility. An embankment will be built over the existing stream, and the existing tile main of Drainage District #103 will be re-laid at a flatter slope to daylight into the pool. The project includes a primary spillway consisting of a 49-foot-wide full-flow open sheet pile drop structure and a 25-foot-wide earthen auxiliary spillway. The design is based on NRCS Conservation Practice Standards 656 (Constructed Wetland) and 378 (Pond), with the project classified as NRCS Job Class IV due to its 990-acre watershed. The report was certified by professional engineer Brandon C. Short on June 10, 2026, with his license renewal date of December 31, 2026.

The design incorporates comprehensive hydrological analysis using HydroCAD modeling with multiple rainfall event scenarios (5-year, 10-year, 25-year, 50-year, and 100-year events) utilizing MSE 4 distribution from the National Engineering Handbook. The permanent pool will have an elevation of 1,360.00 feet with a surface area of 5.36 acres and normal storage of 11.65 acre-feet, with the ability to accommodate larger storm events up to 1,364.50 feet elevation containing 39.42 acre-feet at the top of the dam. The dam does not require an Iowa DNR construction permit as it meets low hazard classification criteria (14.5-foot height, 39.42 acre-feet storage at top of dam). A permanent easement on the Kracht property will be recorded by IDALS, and the project will be permitted under USACE Regional Permit 39. The design includes sediment calculations estimating approximately 28.8 tons of annual sediment delivery, with 21 tons retained annually in the reservoir, and projects sediment accumulation of 3,200 tons over a 150-year period. Soil analysis determined the site contains primarily silty clay loam and loam soils, and survey-grade GPS equipment and LiDAR data were used to establish elevations referenced to NAVD88 and coordinates in the Iowa State Plane North system.

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Bid Book.pdf	PDF	Sep 27, 2026
Specifications.pdf	PDF	Sep 27, 2026
Schedule of Prices.pdf	PDF	Sep 27, 2026
Doc CC Proposal - Acknowledgement - Affidavit.pdf	PDF	Sep 27, 2026
Doc EE Bid Bond.pdf	PDF	Sep 27, 2026
Wetland QA QC Plan.pdf	PDF	Sep 27, 2026
Plans.pdf	PDF	Sep 27, 2026
Notice to Bidders 09-25-26.pdf	PDF	Sep 27, 2026

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Submitted by:

Bolton & Menk, Inc.

1519 Baltimore Drive Ames, IA 50010-8783 P: (515) 233-6100

Kracht Wetland Engineering Design Report

Iowa Department of Agriculture and Land Stewardship June 10, 2026

Prepared by: Bolton & Menk, Inc. Certification Kracht Wetland ǀ 25X.140338.000

Certification

Design Report

For

Kracht Water Quality Wetland

CLA953734C

Iowa Department of Agriculture and Land Stewardship

Clay County, Iowa 25X.140338.000

I hereby certify that this engineering document was prepared by me or under my direct supervision and that I am a duly licensed Professional Engineer under the laws of the State of Iowa.

(Signature)_____________________________ (Date)_________________

Printed or typed name: Brandon C. Short, PE

My renewal date is: December 31, 2026

License Number is: 29449

Pages or sheets covered by this seal: Full Document brandon.short Text Box 6/10/2026

H:\IDALS\25X140338000\3_Design\C_Reports\Kracht Wetland Design Report.docx

Kracht Wetland Design Report Site No. CLA953734C Clay County, Iowa

Project Overview This constructed wetland is planned to provide nutrient reduction benefits to the watershed of Drainage District #103 in Clay 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 Duane and Erneta Kracht near Rossie, Iowa. An embankment will be built over the existing stream, and the existing tile main of Drainage District #103 will be re-laid at a flatter slope to daylight into the pool. Surface runoff and the re-laid tile main will feed the wetland.

Diversion berms are proposed within the permanent pool to encourage mixing and reduce short-cutting of water out of the wetland. Tile flows and storm flows will be released through the primary spillway which is a 49-foot-wide full-flow open sheet pile drop structure. The 25-foot-wide earthen spillway will act as an auxiliary outlet during larger storm events.

Site Selection & Analysis This site was deemed viable because of the size of its watershed (990 acres) and its topography. The slopes are gentle enough to allow the impounding of a large wetland pool without an excessively large berm or a deep pool. 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 silty clay loam and loam. After this review, it was determined that soil borings were unnecessary unless deep excavation work was determined to be needed. The wetland watersheds were analyzed using LiDAR data, with land uses delineated and existing ponds 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 report.

The site was surveyed with survey-grade GPS equipment, and additional topographic information was provided from a publicly available LiDAR database. LiDAR was verified with survey data. 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.

Name: Kracht Wetland Design Report Date: June 10, 2026 Page: 2

Design Standards Iowa NRCS Conservation Practice Standard (CPS) 656 Constructed Wetland, dated December 2023, was used to develop this project. CPS 378 (Pond) was used to design the primary and auxiliary spillways and the embankment. The project is NRCS Job Class IV under CPS 656 because the watershed is between 300 and 1000 acres.

Project Layout A permanent pool elevation and embankment location were selected based on the ability to maximize pool area while minimizing the deep (greater than three feet) pool area and embankment height. The watershed information and rainfall data were used to develop hydrographs in HydroCAD. The storm distribution used was MSE 4, with rainfall depths from the National Engineering Handbook. These hydrographs and the proposed stage-storage information were used to size primary and auxiliary spillways for the wetland. Exceeding the minimum design standards of NRCS CPS 378, the auxiliary spillway is placed above the 25-year storm, and the spillways and embankment are designed to provide at least one foot of freeboard during the 100-year storm. HydroCAD outputs are provided in the appendix.

Existing Tiles One known tile, the Drainage District #103 main, is planned to be re-laid into the wetland pool. A new tile will be installed and will tie into the new district main, to ensure proper drainage of the site. Profiles are provided in the plans for these tiles. There may be unknown tiles on the site that will be found during construction. If applicable, these tiles will be re-laid into the wetland pool and will be sized and placed such that they will not inhibit the pre-existing drainage conditions of the neighboring properties.

Pipe sizing calculations are provided in the appendix.

Dam Regulation A dam construction permit is required by the Iowa DNR if it (1) has a height of at least 25 feet and a storage of 15-acre feet at the top of the dam elevation; or (2) has a storage of at least 50 acre-feet at the top of dam and a height of at least 6 feet; or (3) is assigned a hazard potential of high hazard. This dam does not require a dam construction permit because the height is 14.5 feet, the storage at top of dam is

39.42 acre-feet, and the hazard potential is low hazard.

The dam is classified as “low hazard” if failure of the dam would result in no probable loss of human life, low economic losses, and low public damages. This dam meets the requirements of a low hazard dam.

Land Rights & Permits The permanent easement for this project will be on the Kracht 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.

Page: 3

The project will be permitted under USACE Regional Permit 39. The permit will be obtained by the Iowa Department of Agriculture and Land Stewardship (IDALS). A floodplain permit application will also be obtained by IDALS if necessary.

Sincerely, Bolton & Menk, Inc.

Brandon C. Short, PE Water Resources Project Engineer

Appendices:

A. Soil Survey Map B. Watershed Map C. Hydrology Report D. HydroCAD Output E. Stilling Basin Calculations F. Sheet Pile Weir Calculations G. Pipe Capacity Calculations

Page: 4

Appendix A: Soil Survey Map

Page: 5

Appendix B: Watershed Map

Page: 6

Appendix C: Hydrology Report

25-year Event: 5.60'' 100-year Event: 7.80''

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

* Runoff Curve Number: 85.0 (based on land use shown in this report)

* Primary Spillway Weir Coefficent = 3.1

Tc = 4.4 hours determined by the sum of sheet, shallow concentrated and channel flow times.

Design Parameters and Procedures:

Hydrology Analysis Summary

Rainfall events used for this site were MSE 4 distribution, 24-hour, 5-, 10-, 25-, and 100-year events. The primary spillway is a 49-foot-wide sheet pile open drop structure. The auxiliary spillway is a 35-foot earthen spillway placed above the 25-year rainfall event high water level.

Normal Pool area is 5.36 ac; surface watershed area is approx. 990.3 ac or 1.55 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. Hydrologic data was compiled, sediment calculations were made, the structure was flood routed using the SCS TR-55 method in HydroCAD, and all the output was reviewed.

H:\IDALS\25X140338000\3_Design\C_Reports\Kracht Wetland Hydrology Report.xlsm

IDALS ID Number: CLA953734C Job: Kracht

BMI Project Number: 25X.140338 Designed By: BCS Date: 12/18/2025

Rainfall Data

Clay

MSE 4

Northwest

NEH Title 210 (Figure IA2-25)

SUDAS Design Manual 2025 Edition NOAA Atlas 14

2 2.90 2.92 2.95

5 3.70 3.67 3.73

10 4.40 4.39 4.48

25 5.60 5.50 5.67

50 6.60 6.46 6.70

100 7.80 7.50 7.85

The following rainfall data was used for the hydrologic analysis of the site. Rainfall depths from the NEH Title 210 Figure IA2-25 were used, and two additional sources are shown for reference only.

County:

Storm Distribution:

Iowa Climactic Section (SUDAS):

Data Source

24-hr Rainfall Depths (in) Return Period (Years)

Used

Surface-Drained DA = 990 ac = 1.55 sq mi

H:\IDALS\25X140338000\3_Design\C_Reports\Kracht Wetland Hydrology Report.xlsm Page 2

BMI Project Number: 25X.140338 Designed By: BCS Date: 12/18/2025

Tributary Watershed Data

Area Area Time of Concentration

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

Direct 556 0.87 Tile & Surface 157.1

Northwest 308 0.48 Tile & Surface 425.4

Northeast 127 0.20 Tile & Surface 339.3

Surface Total = 990 ac. 1.55 sq. mi. Average TC = 264 Min.

Tile Main Total = 990 ac. 1.55 sq. mi. Average TC = 4.40 Hrs.

H:\IDALS\25X140338000\3_Design\C_Reports\Kracht Wetland Hydrology Report.xlsm Page 3

BMI Project Number: 25X.140338 Designed By: BCS Date: 12/18/2025

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

Moneta loam B Straight Row Crops, Good 0.4% 78 0.312

Sac silty clay loam, et al. C Straight Row Crops, Good 6.7% 85 5.695

McCreath and Gillett Grove silty clay loam, et al.

C/D Straight Row Crops, Good 92.9% 85 78.965

Total 100.0% 85.0

References 1 USDA - NRCS Soil Survey of Clay County, Iowa.

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

= 1.55 sq mi Runoff Curve Number Surface-Drained DA = 990 ac

H:\IDALS\25X140338000\3_Design\C_Reports\Kracht Wetland Hydrology Report.xlsm Page 4

BMI Project Number: 25X.140338 Designed By: BCS Date: 12/18/2025

Sediment Calculations

DA1

990 acres 1.547 sqmi

Trap efficiency, very short storage time2 73 percent

Average annual sheet and rill erosion3

0.9 tons/ac/yr

Area of depressions not subject to sediment delivery 0 acres

Area subject to sheet and rill erosion 990 acres

Average annual sheet and rill erosion 869 tons

Delivery ratio5

3.5 percent

Sheet and rill erosion delivered to site 30.4 tons/yr

Adjustment for LRA 1032

0.5 factor

Adjusted sheet and rill erosion delivered 15.2 tons/yr

Average annual gully erosion rate4

0.2 cuft/ft

Length of gully erosion 1,700 ft

In place density of gully material 80 lb/cuft

Average annual gully erosion (100% delivered) 13.6 t/yr

Total sediment delivered 28.8 t/yr

Weight of sediment retained in resevoir at 73.0 percent trapped2 21 t/yr

Sediment accumulation during 150 -year period 3,200 tons

Estimate 80 percent of delivered sediment will not be submerged2 2,560 tons

Volume of submerged sediment at 1,307 t/acft2 1.96 acft

Normal pool volume 11.6 acft, will not be full

Estimate 20 percent of delivered sediment will be aerated2 640 tons

Volume of aerated sediment at 1,742 t/acft2 0.37 acft

References 1 Determined by Engineer 2 USDA-NRCS, Engr. Field Man., Chap. 11, Amend. IA 27, Fig.2, May 1986,. Adjusted. See notes.

3 Estimated by preparer.

4 Estimated by preparer.

5 Delivery curve for Des Moines lobe. Source: Iowa Geological Survey

Surface-Drained DA = 990 ac

= 1.55 sq mi

H:\IDALS\25X140338000\3_Design\C_Reports\Kracht Wetland Hydrology Report.xlsm Page 5

BMI Project Number: 25X.140338 Designed By: BCS Date: 12/18/2025

Stage-Storage

Contour Elev. Area Area

Average Area

Incremental Volume

Cumulative Volume

Volume Above Weir

(Ft) (Sq ft) (Acres) (Arces) (Ac-ft) (Ac-ft) (Ac-ft)

1355.00 1399 0.03 0.03 0.00 0.00

1356.00 27566 0.63 0.33 0.33 0.33

1357.00 47270 1.09 0.86 0.86 1.19

1358.00 92763 2.13 1.61 1.61 2.80

1359.00 222287 5.10 3.62 3.62 6.42

1360.00 233629 5.36 5.23 5.23 11.65 0.00

1361.00 249452 5.73 5.55 5.55 17.19 5.55

1362.00 261002 5.99 5.86 5.86 23.05 11.40

1362.75 271900 6.24 6.12 4.59 27.64 15.99

1363.00 277298 6.37 6.30 1.59 29.23 17.58

1364.00 300382 6.90 6.63 6.63 35.86 24.21

1364.50 319122 7.33 7.11 3.56 39.42 27.77

Storage at Normal Pool = 11.65 Acre-feet

Elevation of weir = 1360.00 Feet

Storage at Overflow = 27.64 Acre-feet

Elevation = 1362.75 Feet 2.17 Feet

Notes:

= 1.55 sq mi

Surface-Drained DA = 990 ac

Average Depth =

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

Average Depth = Storage at Normal Pool

Area at Normal Pool

H:\IDALS\25X140338000\3_Design\C_Reports\Kracht Wetland Hydrology Report.xlsm Page 6

BMI Project Number: 25X.140338 Designed By: BCS Date: 12/18/2025

Weir Flow Hydraulics DA = 990 ac

= 1.55 sq mi

Input

Q = CLH1.5

Use C = 3.1

Output

Pool Elev. = 1360.00

Weir Length (ft) 35 40 49 55 60

W.S. Elev. Q (cfs) Q (cfs) Q (cfs) Q (cfs) Q (cfs)

1360.00 0.0 0.0 0.0 0.0 0.0

1360.28 16.2 18.5 22.7 25.4 27.7

1360.56 45.8 52.3 64.1 71.9 78.5

1360.84 84.1 96.1 117.7 132.1 144.2

1361.13 129.5 148.0 181.3 203.4 221.9

1361.41 180.9 206.8 253.3 284.3 310.2

1361.69 237.8 271.8 333.0 373.8 407.7

1361.97 299.7 342.5 419.6 471.0 513.8

1362.25 366.2 418.5 512.7 575.4 627.8

1362.53 437.0 499.4 611.7 686.6 749.1

1362.81 511.8 584.9 716.5 804.2 877.3

1363.09 590.4 674.8 826.6 927.8 1012.1

1363.38 672.7 768.8 941.8 1057.1 1153.3

1363.66 758.5 866.9 1062.0 1192.0 1300.4

1363.94 847.7 968.8 1186.8 1332.2 1453.3

1364.22 940.2 1074.5 1316.2 1477.4 1611.7

MAX POOL 1364.50 1035.7 1183.7 1450.0 1627.6 1775.5

USED

H:\IDALS\25X140338000\3_Design\C_Reports\Kracht Wetland Hydrology Report.xlsm Page 7

BMI Project Number: 25X.140338 Designed By: BCS Date: 12/18/2025

Results Surface-Drained DA = 990 ac The following are based on surface flows and storm response. Discharge includes tile flow and overland flow.

= 1.55 sq mi

0100200300400500600700800

0.00 1.00 2.00 3.00 4.00 5.00 6.00

Discharge (cfs)

E le va ti o n ft

Pool Area (ac)

Pool Area-Elevation-Discharge Graph

Normal Pool

Pool Area (ac)

Discharge (cfs)

1360.00

1360.50

1361.00

1361.50

1362.00

1362.50

1363.00

1363.50

0 4 8 12 16 20 24

E le va ti o n ft

Duration (hours)

Duration-Elevation Graph

5-Year

10-Year

25-year

100-year

H:\IDALS\25X140338000\3_Design\C_Reports\Kracht Wetland Hydrology Report.xlsm Page 8

BMI Project Number: 25X.140338 Designed By: BCS Date: 12/18/2025

Results

1355.00 0.03

1356.00 0.63

1357.00 1.09

1358.00 2.13

1359.00 5.10

1360.00 5.36

1361.00 5.73

1362.00 5.99

1362.75 6.24

1363.00 6.37

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

0 1361.74 0 1362.06 0 1362.64 0 1363.49 2 1361.45 2 1361.74 2 1362.18 2 1362.95 4 1361.17 4 1361.37 4 1361.71 4 1362.28 6 1360.93 6 1361.10 6 1361.37 6 1361.79 8 1360.73 8 1360.85 8 1361.06 8 1361.38

10 1360.56 10 1360.67 10 1360.82 10 1361.07 12 1360.45 12 1360.52 12 1360.64 12 1360.85 14 1360.32 14 1360.39 14 1360.49 14 1360.66 16 1360.22 16 1360.27 16 1360.35 16 1360.49 18 1360.16 18 1360.19 18 1360.25 18 1360.37 20 1360.11 20 1360.15 20 1360.18 20 1360.27 22 1360.09 22 1360.09 22 1360.13 22 1360.20 24 1360.05 24 1360.06 24 1360.09 24 1360.14

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

Surface Discharge (cfs)

The Elevation-Discharge table below shows outflows from the wetland for various elevations.

Elevation (ft) Pool Area (ac)

= 1.55 sq mi Surface-Drained DA = 990 ac

159.38 474.07 706.68 807.82

H:\IDALS\25X140338000\3_Design\C_Reports\Kracht Wetland Hydrology Report.xlsm Page 9

Page: 7

Appendix D: HydroCAD Output

Northwest Watershed

Northeast Watershed

Direct Watershed

North Waterway

NE Waterway

Combined Waterway

Wetland Pool 5P

Box Culvert

Routing Diagram for Kracht HydroCAD Prepared by Bolton & Menk, Inc, Printed 4/29/2026

Subcat Reach Pond Link

Kracht HydroCAD Printed 4/29/2026Prepared by Bolton & Menk, Inc

Rainfall Events Listing

Event# Event

Name

Storm Type Curve Mode Duration

(hours)

B/B Depth

(inches)

AMC

1 5 Year MSE 24-hr 4 Default 24.00 1 3.70 2

2 10 Year MSE 24-hr 4 Default 24.00 1 4.40 2

3 25 Year MSE 24-hr 4 Default 24.00 1 5.60 2

4 50 Year MSE 24-hr 4 Default 24.00 1 6.60 2

5 100 Year MSE 24-hr 4 Default 24.00 1 7.80 2

Area Listing (all nodes)

Area

(acres)

CN Description

(subcatchment-numbers)

990.300 85 Row crops, straight row, Good, HSG C (1S, 2S, 3S)

990.300 85 TOTAL AREA

Soil Listing (all nodes)

Area

(acres)

Soil

Group

Subcatchment

Numbers

0.000 HSG A

0.000 HSG B

990.300 HSG C 1S, 2S, 3S

0.000 HSG D

0.000 Other

990.300 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 0.000 990.300 0.000 0.000 990.300 Row crops, straight row, Good 1S, 2S, 3S

0.000 0.000 990.300 0.000 0.000 990.300 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 5P 1,349.25 1,348.88 50.0 0.0074 0.012 72.0 72.0 0.0

MSE 24-hr 4 5 Year Rainfall=3.70"Kracht HydroCAD

Time span=5.00-96.00 hrs, dt=0.05 hrs, 1821 points 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=308.000 ac 0.00% Impervious Runoff Depth=2.19"Subcatchment 1S: Northwest Watershed Flow Length=7,732' Tc=425.4 min CN=85 Runoff=83.62 cfs 56.250 af

Runoff Area=126.500 ac 0.00% Impervious Runoff Depth=2.19"Subcatchment 2S: Northeast Watershed Flow Length=6,220' Tc=339.3 min CN=85 Runoff=40.94 cfs 23.103 af

Runoff Area=555.800 ac 0.00% Impervious Runoff Depth=2.19"Subcatchment 3S: Direct Watershed Flow Length=7,549' Tc=150.5 min CN=85 Runoff=338.38 cfs 101.506 af

Avg. Flow Depth=0.50' Max Vel=2.19 fps Inflow=83.62 cfs 56.250 afReach 6R: North Waterway n=0.025 L=2,940.0' S=0.0058 '/' Capacity=9,820.14 cfs Outflow=82.82 cfs 56.250 af

Avg. Flow Depth=0.51' Max Vel=1.77 fps Inflow=40.94 cfs 23.103 afReach 7R: NE Waterway n=0.025 L=4,375.0' S=0.0055 '/' Capacity=9,519.90 cfs Outflow=39.80 cfs 23.103 af

Avg. Flow Depth=1.47' Max Vel=2.88 fps Inflow=121.40 cfs 79.353 afReach 8R: Combined Waterway n=0.025 L=1,700.0' S=0.0035 '/' Capacity=5,235.03 cfs Outflow=121.22 cfs 79.353 af

Peak Elev=1,361.68' Storage=21.165 af Inflow=355.41 cfs 180.860 afPond 4P: Wetland Pool Outflow=347.33 cfs 180.859 af

Peak Elev=1,356.97' Storage=0.655 af Inflow=347.33 cfs 180.859 afPond 5P: Box Culvert Primary=347.02 cfs 181.376 af Secondary=0.00 cfs 0.000 af Outflow=347.02 cfs 181.376 af

Total Runoff Area = 990.300 ac Runoff Volume = 180.860 af Average Runoff Depth = 2.19" 100.00% Pervious = 990.300 ac 0.00% Impervious = 0.000 ac

Summary for Subcatchment 1S: Northwest Watershed

Runoff = 83.62 cfs @ 17.50 hrs, Volume= 56.250 af, Depth= 2.19" Routed to Reach 6R : North Waterway

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 4 5 Year Rainfall=3.70"

Area (ac) CN Description

308.000 85 Row crops, straight row, Good, HSG C

308.000 100.00% Pervious Area

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

19.8 100 0.0050 0.08 Sheet Flow, Sheet Flow

Cultivated: Residue>20% n= 0.170 P2= 2.90"

311.9 4,125 0.0006 0.22 Shallow Concentrated Flow, Shallow, Flat

Cultivated Straight Rows Kv= 9.0 fps

93.7 3,507 0.0048 0.62 Shallow Concentrated Flow, Shallow, Steep

Cultivated Straight Rows Kv= 9.0 fps

425.4 7,732 Total

Subcatchment 1S: Northwest Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

F lo w

(c fs

MSE 24-hr 4 5 Year Rainfall=3.70"

Runoff Area=308.000 ac Runoff Volume=56.250 af

Runoff Depth=2.19" Flow Length=7,732'

Tc=425.4 min

CN=85

83.62 cfs

Summary for Subcatchment 2S: Northeast Watershed

Runoff = 40.94 cfs @ 16.55 hrs, Volume= 23.103 af, Depth= 2.19" Routed to Reach 7R : NE Waterway

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 4 5 Year Rainfall=3.70"

Area (ac) CN Description

126.500 85 Row crops, straight row, Good, HSG C

126.500 100.00% Pervious Area

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

11.4 100 0.0200 0.15 Sheet Flow, Sheet Flow

Cultivated: Residue>20% n= 0.170 P2= 2.90"

250.1 3,820 0.0008 0.25 Shallow Concentrated Flow, Shallow, Flat

Cultivated Straight Rows Kv= 9.0 fps

77.8 2,300 0.0030 0.49 Shallow Concentrated Flow, Shallow, Steep

Cultivated Straight Rows Kv= 9.0 fps

339.3 6,220 Total

Subcatchment 2S: Northeast Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 4 5 Year Rainfall=3.70"

Runoff Area=126.500 ac Runoff Volume=23.103 af

Runoff Depth=2.19" Flow Length=6,220'

Tc=339.3 min

40.94 cfs

Summary for Subcatchment 3S: Direct Watershed

[47] Hint: Peak is 355% of capacity of segment #3 [47] Hint: Peak is 134% of capacity of segment #5

Runoff = 338.38 cfs @ 14.03 hrs, Volume= 101.506 af, Depth= 2.19" Routed to Pond 4P : 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 4 5 Year Rainfall=3.70"

Area (ac) CN Description

555.800 85 Row crops, straight row, Good, HSG C

555.800 100.00% Pervious Area

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

19.8 100 0.0050 0.08 Sheet Flow, Sheet Flow

Cultivated: Residue>20% n= 0.170 P2= 2.90"

44.1 952 0.0016 0.36 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

4.5 927 0.0065 3.41 95.39 Channel Flow, Ditch

Area= 28.0 sf Perim= 28.2' r= 0.99' n= 0.035 Earth, dense weeds

70.5 3,070 0.0065 0.73 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

11.6 2,500 0.0053 3.61 252.43 Channel Flow, Area= 70.0 sf Perim= 70.0' r= 1.00' n= 0.030 Earth, grassed & winding

150.5 7,549 Total

Subcatchment 3S: Direct Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 4 5 Year Rainfall=3.70"

Runoff Area=555.800 ac Runoff Volume=101.506 af

Runoff Depth=2.19" Flow Length=7,549'

Tc=150.5 min

338.38 cfs

Summary for Reach 6R: North Waterway

Inflow Area = 308.000 ac, 0.00% Impervious, Inflow Depth = 2.19" for 5 Year event Inflow = 83.62 cfs @ 17.50 hrs, Volume= 56.250 af Outflow = 82.82 cfs @ 17.81 hrs, Volume= 56.250 af, Atten= 1%, Lag= 18.6 min Routed to Reach 8R : Combined Waterway

Routing by Dyn-Stor-Ind method, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs Max. Velocity= 2.19 fps, Min. Travel Time= 22.4 min Avg. Velocity = 0.96 fps, Avg. Travel Time= 50.9 min

Peak Storage= 111,183 cf @ 17.81 hrs Average Depth at Peak Storage= 0.50' , Surface Width= 112.21' Bank-Full Depth= 4.00' Flow Area= 1,256.0 sf, Capacity= 9,820.14 cfs

Custom cross-section, Length= 2,940.0' Slope= 0.0058 '/' Constant n= 0.025 Earth, clean & straight Inlet Invert= 1,391.00', Outlet Invert= 1,374.00'

Offset Elevation Chan.Depth (feet) (feet) (feet)

0.00 1,384.00 0.00

142.00 1,382.00 2.00

272.00 1,380.00 4.00

310.00 1,380.00 4.00

475.00 1,382.00 2.00

552.00 1,384.00 0.00

Depth End Area Perim. Width Storage Discharge (feet) (sq-ft) (feet) (feet) (cubic-feet) (cfs)

0.00 0.0 38.0 0.0 0 0.00

2.00 371.0 333.0 333.0 1,090,740 1,802.05

4.00 1,256.0 552.1 552.0 3,692,640 9,820.14

Reach 6R: North Waterway

Inflow Outflow

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=308.000 ac Avg. Flow Depth=0.50'

Max Vel=2.19 fps n=0.025

L=2,940.0' S=0.0058 '/'

Capacity=9,820.14 cfs

83.62 cfs82.82 cfs

Reach 6R: North Waterway

Primary

Stage-Discharge

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

D ep th

(f ee t)

Reach 6R: North Waterway

Storage

Stage-Storage

Storage (cubic-feet) 3,500,0003,000,0002,500,0002,000,0001,500,0001,000,000500,0000

D t)

Summary for Reach 7R: NE Waterway

Inflow Area = 126.500 ac, 0.00% Impervious, Inflow Depth = 2.19" for 5 Year event Inflow = 40.94 cfs @ 16.55 hrs, Volume= 23.103 af Outflow = 39.80 cfs @ 17.09 hrs, Volume= 23.103 af, Atten= 3%, Lag= 32.5 min Routed to Reach 8R : Combined Waterway

Routing by Dyn-Stor-Ind method, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs Max. Velocity= 1.77 fps, Min. Travel Time= 41.2 min Avg. Velocity = 0.66 fps, Avg. Travel Time= 110.4 min

Peak Storage= 98,305 cf @ 17.09 hrs Average Depth at Peak Storage= 0.51' , Surface Width= 88.12' Bank-Full Depth= 4.00' Flow Area= 1,312.0 sf, Capacity= 9,519.90 cfs

Custom cross-section, Length= 4,375.0' Slope= 0.0055 '/' Constant n= 0.025 Earth, clean & straight Inlet Invert= 1,399.00', Outlet Invert= 1,375.00'

Offset Elevation Chan.Depth (feet) (feet) (feet)

0.00 1,392.00 0.00

114.00 1,390.00 2.00

294.00 1,388.00 4.00

460.00 1,390.00 2.00

620.00 1,392.00 0.00

Depth End Area Perim. Width Storage Discharge (feet) (sq-ft) (feet) (feet) (cubic-feet) (cfs)

0.00 0.0 0.0 0.0 0 0.00

2.00 346.0 346.0 346.0 1,513,750 1,523.18

4.00 1,312.0 620.1 620.0 5,740,000 9,519.90

Reach 7R: NE Waterway

Inflow Outflow

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=126.500 ac Avg. Flow Depth=0.51'

Max Vel=1.77 fps n=0.025

L=4,375.0' S=0.0055 '/'

Capacity=9,519.90 cfs

40.94 cfs

39.80 cfs

Reach 7R: NE Waterway

Primary

Stage-Discharge

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

D t)

Reach 7R: NE Waterway

Storage

Stage-Storage

Storage (cubic-feet) 5,500,0005,000,0004,500,0004,000,0003,500,0003,000,0002,500,0002,000,0001,500,0001,000,000500,0000

D t)

Summary for Reach 8R: Combined Waterway

[62] Hint: Exceeded Reach 6R OUTLET depth by 0.97' @ 17.65 hrs [61] Hint: Exceeded Reach 7R outlet invert by 0.47' @ 17.70 hrs

Inflow Area = 434.500 ac, 0.00% Impervious, Inflow Depth = 2.19" for 5 Year event Inflow = 121.40 cfs @ 17.58 hrs, Volume= 79.353 af Outflow = 121.22 cfs @ 17.70 hrs, Volume= 79.353 af, Atten= 0%, Lag= 7.2 min Routed to Pond 4P : Wetland Pool

Routing by Dyn-Stor-Ind method, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs Max. Velocity= 2.88 fps, Min. Travel Time= 9.9 min Avg. Velocity = 1.03 fps, Avg. Travel Time= 27.5 min

Peak Storage= 71,677 cf @ 17.70 hrs Average Depth at Peak Storage= 1.47' , Surface Width= 57.34' Bank-Full Depth= 6.00' Flow Area= 716.0 sf, Capacity= 5,235.03 cfs

Custom cross-section, Length= 1,700.0' Slope= 0.0035 '/' (102 Elevation Intervals) Constant n= 0.025 Earth, clean & straight Inlet Invert= 1,374.00', Outlet Invert= 1,368.00'

Offset Elevation Chan.Depth (feet) (feet) (feet)

0.00 1,374.00 0.00

33.00 1,372.00 2.00

57.00 1,370.00 4.00

91.00 1,368.00 6.00

135.00 1,370.00 4.00

193.00 1,372.00 2.00

240.00 1,374.00 0.00

Depth End Area Perim. Width Storage Discharge (feet) (sq-ft) (feet) (feet) (cubic-feet) (cfs)

0.00 0.0 0.0 0.0 0 0.00

2.00 78.0 78.1 78.0 132,600 275.19

4.00 316.0 160.2 160.0 537,200 1,754.93

6.00 716.0 240.3 240.0 1,217,200 5,235.03

Reach 8R: Combined Waterway

Inflow Outflow

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=434.500 ac Avg. Flow Depth=1.47'

Max Vel=2.88 fps n=0.025

L=1,700.0' S=0.0035 '/'

Capacity=5,235.03 cfs

121.40 cfs121.22 cfs

Reach 8R: Combined Waterway

Primary

Stage-Discharge

Discharge (cfs) 5,0004,5004,0003,5003,0002,5002,0001,5001,0005000

D t)

Reach 8R: Combined Waterway

Storage

Stage-Storage

Storage (cubic-feet) 1,200,0001,100,0001,000,000900,000800,000700,000600,000500,000400,000300,000200,000100,0000

D t)

Summary for Pond 4P: Wetland Pool

Inflow Area = 990.300 ac, 0.00% Impervious, Inflow Depth = 2.19" for 5 Year event Inflow = 355.41 cfs @ 14.18 hrs, Volume= 180.860 af Outflow = 347.33 cfs @ 14.37 hrs, Volume= 180.859 af, Atten= 2%, Lag= 11.7 min Primary = 347.33 cfs @ 14.37 hrs, Volume= 180.859 af Routed to Pond 5P : Box Culvert

Routing by Dyn-Stor-Ind method, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs Starting Elev= 1,360.00' Surf.Area= 5.363 ac Storage= 11.648 af Peak Elev= 1,361.68' @ 14.37 hrs Surf.Area= 5.908 ac Storage= 21.165 af (9.516 af above start)

Plug-Flow detention time= 93.0 min calculated for 169.210 af (94% of inflow) Center-of-Mass det. time= 27.2 min ( 1,089.6 - 1,062.4 )

Volume Invert Avail.Storage Storage Description #1 1,355.00' 39.394 af Custom Stage Data (Prismatic) Listed below (Recalc)

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

1,355.00 0.032 0.000 0.000 1,356.00 0.633 0.333 0.333 1,357.00 1.085 0.859 1.192 1,358.00 2.130 1.607 2.799 1,359.00 5.103 3.616 6.415 1,360.00 5.363 5.233 11.648 1,361.00 5.727 5.545 17.193 1,362.00 5.992 5.859 23.053 1,362.50 6.130 3.030 26.083 1,363.00 6.366 3.124 29.207 1,364.00 6.896 6.631 35.838 1,364.50 7.326 3.556 39.394

Device Routing Invert Outlet Devices #1 Primary 1,360.00' 49.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #2 Primary 1,362.75' 35.0' long + 3.0 '/' SideZ x 15.0' 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) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63

Primary OutFlow Max=347.25 cfs @ 14.37 hrs HW=1,361.68' TW=1,356.96' (Dynamic Tailwater) 1=Sharp-Crested Rectangular Weir (Weir Controls 347.25 cfs @ 4.24 fps) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)

Pond 4P: Wetland Pool

Inflow Primary

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=990.300 ac Peak Elev=1,361.68'

Storage=21.165 af

355.41 cfs

347.33 cfs

Pond 4P: Wetland Pool

Primary

Stage-Discharge

Discharge (cfs) 1,6001,4001,2001,0008006004002000

E le va ti o n t)

1,364

1,363

1,362

1,361

1,360

1,359

1,358

1,357

1,356

1,355

Sharp-Crested Rectangular Weir

Broad-Crested Rectangular Weir

Pond 4P: Wetland Pool

Surface Storage

Stage-Area-Storage

Storage (acre-feet) 35302520151050

Surface/Horizontal/Wetted Area (acres) 76543210

E le va ti t)

1,364

1,363

1,362

1,361

1,360

1,359

1,358

1,357

1,356

1,355

Starting Elevation

Custom Stage Data

Summary for Pond 5P: Box Culvert

Inflow Area = 990.300 ac, 0.00% Impervious, Inflow Depth = 2.19" for 5 Year event Inflow = 347.33 cfs @ 14.37 hrs, Volume= 180.859 af Outflow = 347.02 cfs @ 14.42 hrs, Volume= 181.376 af, Atten= 0%, Lag= 3.0 min Primary = 347.02 cfs @ 14.42 hrs, Volume= 181.376 af 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 Starting Elev= 1,353.00' Surf.Area= 0.053 ac Storage= 0.089 af Peak Elev= 1,356.97' @ 14.42 hrs Surf.Area= 0.261 ac Storage= 0.655 af (0.565 af above start)

Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= (not calculated: outflow precedes inflow)

Volume Invert Avail.Storage Storage Description #1 1,349.00' 2.676 af Custom Stage Data (Prismatic) Listed below (Recalc)

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

1,349.00 0.000 0.000 0.000 1,350.00 0.007 0.004 0.004 1,351.00 0.017 0.012 0.016 1,352.00 0.039 0.028 0.043 1,353.00 0.053 0.046 0.089 1,354.00 0.068 0.061 0.150 1,355.00 0.145 0.106 0.256 1,356.00 0.202 0.173 0.430 1,357.00 0.263 0.233 0.662 1,358.00 0.337 0.300 0.962 1,359.00 0.411 0.374 1.337 1,360.00 0.509 0.460 1.797 1,361.00 0.612 0.561 2.357 1,361.50 0.664 0.319 2.676

Device Routing Invert Outlet Devices #1 Primary 1,349.25' 72.0" W x 72.0" H Box Box Culvert

L= 50.0' Box, 30-75° wingwalls, square crown, Ke= 0.400 Inlet / Outlet Invert= 1,349.25' / 1,348.88' S= 0.0074 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 36.00 sf

#2 Secondary 1,359.83' Roadway, Cv= 2.62 (C= 3.28) Elev. (feet) 1,359.83 1,360.00 1,360.50 1,361.00 1,361.50 1,362.00 Width (feet) 0.00 61.56 116.46 160.90 195.03 228.25

Primary OutFlow Max=346.94 cfs @ 14.42 hrs HW=1,356.97' (Free Discharge) 1=Box Culvert (Barrel Controls 346.94 cfs @ 9.99 fps)

Secondary OutFlow Max=0.00 cfs @ 5.00 hrs HW=1,353.00' (Free Discharge) 2=Roadway ( Controls 0.00 cfs)

Pond 5P: Box Culvert

Inflow Outflow Primary Secondary

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=990.300 ac Peak Elev=1,356.97'

Storage=0.655 af

347.33 cfs347.02 cfs347.02 cfs

0.00 cfs

Pond 5P: Box Culvert

Total Primary Secondary

Stage-Discharge

Discharge (cfs) 1,8001,6001,4001,2001,0008006004002000

E le va ti t)

1,362

1,361

1,360

1,359

1,358

1,357

1,356

1,355

1,354

1,353

1,352

1,351

1,350

1,349 Box Culvert

Roadway

Pond 5P: Box Culvert

Surface Storage

Stage-Area-Storage

Storage (acre-feet)

Surface/Horizontal/Wetted Area (acres) 0.650.60.550.50.450.40.350.30.250.20.150.10.050

E le va ti t)

1,362

1,361

1,360

1,359

1,358

1,357

1,356

1,355

1,354

1,353

1,352

1,351

1,350

1,349

MSE 24-hr 4 10 Year Rainfall=4.40"Kracht HydroCAD

Time span=5.00-96.00 hrs, dt=0.05 hrs, 1821 points 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=308.000 ac 0.00% Impervious Runoff Depth=2.82"Subcatchment 1S: Northwest Watershed Flow Length=7,732' Tc=425.4 min CN=85 Runoff=108.03 cfs 72.334 af

Runoff Area=126.500 ac 0.00% Impervious Runoff Depth=2.82"Subcatchment 2S: Northeast Watershed Flow Length=6,220' Tc=339.3 min CN=85 Runoff=52.87 cfs 29.708 af

Runoff Area=555.800 ac 0.00% Impervious Runoff Depth=2.82"Subcatchment 3S: Direct Watershed Flow Length=7,549' Tc=150.5 min CN=85 Runoff=435.60 cfs 130.529 af

Avg. Flow Depth=0.57' Max Vel=2.35 fps Inflow=108.03 cfs 72.334 afReach 6R: North Waterway n=0.025 L=2,940.0' S=0.0058 '/' Capacity=9,820.14 cfs Outflow=107.09 cfs 72.334 af

Avg. Flow Depth=0.56' Max Vel=1.89 fps Inflow=52.87 cfs 29.708 afReach 7R: NE Waterway n=0.025 L=4,375.0' S=0.0055 '/' Capacity=9,519.90 cfs Outflow=51.53 cfs 29.708 af

Avg. Flow Depth=1.62' Max Vel=3.06 fps Inflow=156.89 cfs 102.042 afReach 8R: Combined Waterway n=0.025 L=1,700.0' S=0.0035 '/' Capacity=5,235.03 cfs Outflow=156.69 cfs 102.042 af

Peak Elev=1,362.01' Storage=23.104 af Inflow=460.68 cfs 232.572 afPond 4P: Wetland Pool Outflow=452.37 cfs 232.571 af

Peak Elev=1,358.60' Storage=1.177 af Inflow=452.37 cfs 232.571 afPond 5P: Box Culvert Primary=451.41 cfs 233.088 af Secondary=0.00 cfs 0.000 af Outflow=451.41 cfs 233.088 af

Total Runoff Area = 990.300 ac Runoff Volume = 232.572 af Average Runoff Depth = 2.82"

Summary for Subcatchment 1S: Northwest Watershed

Runoff = 108.03 cfs @ 17.50 hrs, Volume= 72.334 af, Depth= 2.82" Routed to Reach 6R : North Waterway

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 4 10 Year Rainfall=4.40"

Area (ac) CN Description

308.000 85 Row crops, straight row, Good, HSG C

308.000 100.00% Pervious Area

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

19.8 100 0.0050 0.08 Sheet Flow, Sheet Flow

Cultivated: Residue>20% n= 0.170 P2= 2.90"

311.9 4,125 0.0006 0.22 Shallow Concentrated Flow, Shallow, Flat

Cultivated Straight Rows Kv= 9.0 fps

93.7 3,507 0.0048 0.62 Shallow Concentrated Flow, Shallow, Steep

Cultivated Straight Rows Kv= 9.0 fps

425.4 7,732 Total

Subcatchment 1S: Northwest Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 4 10 Year Rainfall=4.40"

Runoff Area=308.000 ac Runoff Volume=72.334 af

Runoff Depth=2.82" Flow Length=7,732'

Tc=425.4 min

108.03 cfs

Summary for Subcatchment 2S: Northeast Watershed

Runoff = 52.87 cfs @ 16.27 hrs, Volume= 29.708 af, Depth= 2.82" Routed to Reach 7R : NE Waterway

Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs MSE 24-hr 4 10 Year Rainfall=4.40"

Area (ac) CN Description

126.500 85 Row crops, straight row, Good, HSG C

126.500 100.00% Pervious Area

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

11.4 100 0.0200 0.15 Sheet Flow, Sheet Flow

Cultivated: Residue>20% n= 0.170 P2= 2.90"

250.1 3,820 0.0008 0.25 Shallow Concentrated Flow, Shallow, Flat

Cultivated Straight Rows Kv= 9.0 fps

77.8 2,300 0.0030 0.49 Shallow Concentrated Flow, Shallow, Steep

Cultivated Straight Rows Kv= 9.0 fps

339.3 6,220 Total

Subcatchment 2S: Northeast Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 4 10 Year Rainfall=4.40"

Runoff Area=126.500 ac Runoff Volume=29.708 af

Runoff Depth=2.82" Flow Length=6,220'

Tc=339.3 min

52.87 cfs

Summary for Subcatchment 3S: Direct Watershed

[47] Hint: Peak is 457% of capacity of segment #3 [47] Hint: Peak is 173% of capacity of segment #5

Runoff = 435.60 cfs @ 13.98 hrs, Volume= 130.529 af, Depth= 2.82" Routed to Pond 4P : 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 4 10 Year Rainfall=4.40"

Area (ac) CN Description

555.800 85 Row crops, straight row, Good, HSG C

555.800 100.00% Pervious Area

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

19.8 100 0.0050 0.08 Sheet Flow, Sheet Flow

Cultivated: Residue>20% n= 0.170 P2= 2.90"

44.1 952 0.0016 0.36 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

4.5 927 0.0065 3.41 95.39 Channel Flow, Ditch

Area= 28.0 sf Perim= 28.2' r= 0.99' n= 0.035 Earth, dense weeds

70.5 3,070 0.0065 0.73 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps

11.6 2,500 0.0053 3.61 252.43 Channel Flow, Area= 70.0 sf Perim= 70.0' r= 1.00'

Subcatchment 3S: Direct Watershed

Runoff

Hydrograph

Time (hours) 9590858075706560555045403530252015105

MSE 24-hr 4 10 Year Rainfall=4.40"

Runoff Area=555.800 ac Runoff Volume=130.529 af

Runoff Depth=2.82" Flow Length=7,549'

Tc=150.5 min

435.60 cfs

Summary for Reach 6R: North Waterway

Inflow Area = 308.000 ac, 0.00% Impervious, Inflow Depth = 2.82" for 10 Year event Inflow = 108.03 cfs @ 17.50 hrs, Volume= 72.334 af Outflow = 107.09 cfs @ 17.74 hrs, Volume= 72.334 af, Atten= 1%, Lag= 14.4 min Routed to Reach 8R : Combined Waterway

Routing by Dyn-Stor-Ind method, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs Max. Velocity= 2.35 fps, Min. Travel Time= 20.9 min Avg. Velocity = 1.00 fps, Avg. Travel Time= 48.8 min

Peak Storage= 134,178 cf @ 17.74 hrs Average Depth at Peak Storage= 0.57' , Surface Width= 122.07' Bank-Full Depth= 4.00' Flow Area= 1,256.0 sf, Capacity= 9,820.14 cfs

Custom cross-section, Length= 2,940.0' Slope= 0.0058 '/' Constant n= 0.025 Earth, clean & straight Inlet Invert= 1,391.00', Outlet Invert= 1,374.00'

Offset Elevation Chan.Depth (feet) (feet) (feet)

0.00 1,384.00 0.00

142.00 1,382.00 2.00

272.00 1,380.00 4.00

310.00 1,380.00 4.00

475.00 1,382.00 2.00

552.00 1,384.00 0.00

Depth End Area Perim. Width Storage Discharge (feet) (sq-ft) (feet) (feet) (cubic-feet) (cfs)

0.00 0.0 38.0 0.0 0 0.00

Reach 6R: North Waterway

Inflow Outflow

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=308.000 ac Avg. Flow Depth=0.57'

Max Vel=2.35 fps n=0.025

L=2,940.0' S=0.0058 '/'

Capacity=9,820.14 cfs

108.03 cfs107.09 cfs

Reach 6R: North Waterway

Primary

Stage-Discharge

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

D t)

Reach 6R: North Waterway

Storage

Stage-Storage

Storage (cubic-feet) 3,500,0003,000,0002,500,0002,000,0001,500,0001,000,000500,0000

D t)

Summary for Reach 7R: NE Waterway

Inflow Area = 126.500 ac, 0.00% Impervious, Inflow Depth = 2.82" for 10 Year event Inflow = 52.87 cfs @ 16.27 hrs, Volume= 29.708 af Outflow = 51.53 cfs @ 17.02 hrs, Volume= 29.708 af, Atten= 3%, Lag= 45.1 min Routed to Reach 8R : Combined Waterway

Routing by Dyn-Stor-Ind method, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs Max. Velocity= 1.89 fps, Min. Travel Time= 38.6 min Avg. Velocity = 0.69 fps, Avg. Travel Time= 106.3 min

Peak Storage= 119,399 cf @ 17.02 hrs Average Depth at Peak Storage= 0.56' , Surface Width= 97.16' Bank-Full Depth= 4.00' Flow Area= 1,312.0 sf, Capacity= 9,519.90 cfs

Custom cross-section, Length= 4,375.0' Slope= 0.0055 '/' Constant n= 0.025 Earth, clean & straight Inlet Invert= 1,399.00', Outlet Invert= 1,375.00'

Offset Elevation Chan.Depth (feet) (feet) (feet)

0.00 1,392.00 0.00

114.00 1,390.00 2.00

294.00 1,388.00 4.00

460.00 1,390.00 2.00

620.00 1,392.00 0.00

Depth End Area Perim. Width Storage Discharge (feet) (sq-ft) (feet) (feet) (cubic-feet) (cfs)

0.00 0.0 0.0 0.0 0 0.00

Reach 7R: NE Waterway

Inflow Outflow

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=126.500 ac Avg. Flow Depth=0.56'

Max Vel=1.89 fps n=0.025

L=4,375.0' S=0.0055 '/'

Capacity=9,519.90 cfs

52.87 cfs

51.53 cfs

Reach 7R: NE Waterway

Primary

Stage-Discharge

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

D t)

Reach 7R: NE Waterway

Storage

Stage-Storage

Storage (cubic-feet) 5,500,0005,000,0004,500,0004,000,0003,500,0003,000,0002,500,0002,000,0001,500,0001,000,000500,0000

D t)

Summary for Reach 8R: Combined Waterway

[62] Hint: Exceeded Reach 6R OUTLET depth by 1.05' @ 17.55 hrs [62] Hint: Exceeded Reach 7R OUTLET depth by 0.07' @ 18.00 hrs

Inflow Area = 434.500 ac, 0.00% Impervious, Inflow Depth = 2.82" for 10 Year event Inflow = 156.89 cfs @ 17.54 hrs, Volume= 102.042 af Outflow = 156.69 cfs @ 17.64 hrs, Volume= 102.042 af, Atten= 0%, Lag= 6.1 min Routed to Pond 4P : Wetland Pool

Routing by Dyn-Stor-Ind method, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs Max. Velocity= 3.06 fps, Min. Travel Time= 9.2 min Avg. Velocity = 1.07 fps, Avg. Travel Time= 26.4 min

Peak Storage= 86,916 cf @ 17.64 hrs Average Depth at Peak Storage= 1.62' , Surface Width= 63.15' Bank-Full Depth= 6.00' Flow Area= 716.0 sf, Capacity= 5,235.03 cfs

Custom cross-section, Length= 1,700.0' Slope= 0.0035 '/' (102 Elevation Intervals) Constant n= 0.025 Earth, clean & straight Inlet Invert= 1,374.00', Outlet Invert= 1,368.00'

Offset Elevation Chan.Depth (feet) (feet) (feet)

0.00 1,374.00 0.00

33.00 1,372.00 2.00

57.00 1,370.00 4.00

91.00 1,368.00 6.00

135.00 1,370.00 4.00

193.00 1,372.00 2.00

240.00 1,374.00 0.00

Depth End Area Perim. Width Storage Discharge (feet) (sq-ft) (feet) (feet) (cubic-feet) (cfs)

0.00 0.0 0.0 0.0 0 0.00

2.00 78.0 78.1 78.0 132,600 275.19

Reach 8R: Combined Waterway

Inflow Outflow

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=434.500 ac Avg. Flow Depth=1.62'

Max Vel=3.06 fps n=0.025

L=1,700.0' S=0.0035 '/'

Capacity=5,235.03 cfs

156.89 cfs156.69 cfs

Reach 8R: Combined Waterway

Primary

Stage-Discharge

Discharge (cfs) 5,0004,5004,0003,5003,0002,5002,0001,5001,0005000

D t)

Reach 8R: Combined Waterway

Storage

Stage-Storage

Storage (cubic-feet) 1,200,0001,100,0001,000,000900,000800,000700,000600,000500,000400,000300,000200,000100,0000

D t)

Summary for Pond 4P: Wetland Pool

Inflow Area = 990.300 ac, 0.00% Impervious, Inflow Depth = 2.82" for 10 Year event Inflow = 460.68 cfs @ 14.05 hrs, Volume= 232.572 af Outflow = 452.37 cfs @ 14.33 hrs, Volume= 232.571 af, Atten= 2%, Lag= 17.1 min Primary = 452.37 cfs @ 14.33 hrs, Volume= 232.571 af Routed to Pond 5P : Box Culvert

Routing by Dyn-Stor-Ind method, Time Span= 5.00-96.00 hrs, dt= 0.05 hrs Starting Elev= 1,360.00' Surf.Area= 5.363 ac Storage= 11.648 af Peak Elev= 1,362.01' @ 14.33 hrs Surf.Area= 5.994 ac Storage= 23.104 af (11.456 af above start)

Plug-Flow detention time= 77.2 min calculated for 220.801 af (95% of inflow) Center-of-Mass det. time= 25.1 min ( 1,080.4 - 1,055.2 )

Volume Invert Avail.Storage Storage Description #1 1,355.00' 39.394 af Custom Stage Data (Prismatic) Listed below (Recalc)

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

Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63

Primary OutFlow Max=452.29 cfs @ 14.33 hrs HW=1,362.01' TW=1,358.58' (Dynamic Tailwater) 1=Sharp-Crested Rectangular Weir (Weir Controls 452.29 cfs @ 4.63 fps)

Pond 4P: Wetland Pool

Inflow Primary

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=990.300 ac Peak Elev=1,362.01'

Storage=23.104 af

460.68 cfs452.37 cfs

Pond 4P: Wetland Pool

Primary

Stage-Discharge

Discharge (cfs) 1,6001,4001,2001,0008006004002000

E le va ti t)

1,364

1,363

1,362

1,361

1,360

1,359

1,358

1,357

1,356

1,355

Pond 4P: Wetland Pool

Surface Storage

Stage-Area-Storage

Storage (acre-feet) 35302520151050

Surface/Horizontal/Wetted Area (acres) 76543210

E le va ti t)

1,364

1,363

1,362

1,361

1,360

1,359

1,358

1,357

1,356

1,355

Summary for Pond 5P: Box Culvert

Inflow Area = 990.300 ac, 0.00% Impervious, Inflow Depth = 2.82" for 10 Year event Inflow = 452.37 cfs @ 14.33 hrs, Volume= 232.571 af Outflow = 451.41 cfs @ 14.41 hrs, Volume= 233.088 af, Atten= 0%, Lag= 4.7 min Primary = 451.41 cfs @ 14.41 hrs, Volume= 233.088 af 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 Starting Elev= 1,353.00' Surf.Area= 0.053 ac Storage= 0.089 af Peak Elev= 1,358.60' @ 14.41 hrs Surf.Area= 0.381 ac Storage= 1.177 af (1.088 af above start)

Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= (not calculated: outflow precedes inflow)

Volume Invert Avail.Storage Storage Description #1 1,349.00' 2.676 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 1,349.25' 72.0" W x 72.0" H Box Box Culvert

L= 50.0' Box, 30-75° wingwalls, square crown, Ke= 0.400 Inlet / Outlet Invert= 1,349.25' / 1,348.88' S= 0.0074 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 36.00 sf

#2 Secondary 1,359.83' Roadway, Cv= 2.62 (C= 3.28) Elev. (feet) 1,359.83 1,360.00 1,360.50 1,361.00 1,361.50 1,362.00 Width (feet) 0.00 61.56 116.46 160.90 195.03 228.25

Primary OutFlow Max=451.33 cfs @ 14.41 hrs HW=1,358.60' (Free Discharge) 1=Box Culvert (Barrel Controls 451.33 cfs @ 12.54 fps)

Secondary OutFlow Max=0.00 cfs @ 5.00 hrs HW=1,353.00' (Free Discharge) 2=Roadway ( Controls 0.00 cfs)

Pond 5P: Box Culvert

Inflow Outflow Primary Secondary

Hydrograph

Time (hours) 9590858075706560555045403530252015105

Inflow Area=990.300 ac Peak Elev=1,358.60'

Storage=1.177 af

452.37 cfs451.41 cfs451.41 cfs

0.00 cfs

Pond 5P: Box Culvert

Total Primary Secondary

Stage-Discharge

Discharge (cfs) 1,8001,6001,4001,2001,0008006004002000

E le va ti t)

1,362

1,361

1,360

1,359

1,358

1,357

1,356

1,355

1,354

1,353

1,352

1,351

1,350

1,349

Pond 5P: Box Culvert

Surface Storage

Stage-Area-Storage

Storage (acre-feet)

Surface/Horizontal/Wetted Area (acres) 0.650.60.550.50.450.40.350.30.250.20.150.10.050

E le va ti t)

1,362

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File details come from the government source that posted it. Updated Sep 28, 2026.