StormSight
Infrastructure Intelligence Report
D
01

Infrastructure Assets

30 assets

Detected stormwater assets from OpenStreetMap data

Manhole
3
Fire Hydrant
5
Storm Drain
22
Total Assets
30
Asset Density
2.83 / sq mi

National benchmark: 20/sq mi

Only 30 assets detected -- significant infrastructure likely undocumented

At 2.83 assets per square mile, Woodstock is far below the national benchmark of 20 assets per square mile.

Woodstock
2.83
Benchmark
20.0
Storm Drain
Manhole
Fire Hydrant
Predicted (Inference)
Inference Engine
v1.0.0
124

predicted assets from engineering inference, bringing total estimated infrastructure to 154 assets

Detected Assets
30

From OSM + Google Earth

High Confidence
99

Predicted assets

Medium Confidence
25

Predicted assets

Pipe Segments
200

2.85 mi network

Prediction Confidence Distribution

High Confidence
99
Medium Confidence
25
Network Length
2.85 mi
15,037 ft
Avg Pipe Diameter
30.7"
inches
Manning's n
0.013
Concrete pipe roughness
Inference Methodology

The inference engine uses standard engineering spacing rules, the Rational Method (Q = CiA with C=0.52, i=4.2 in/hr), and Manning's equation to predict hidden infrastructure between detected assets. Gaps exceeding 1.5x the standard maximum spacing for the calculated pipe diameter are flagged as locations where additional catch basins or manholes likely exist. Drainage area: 6,784 acres.

Predicted Assets
124
from 30 detected
Total Network
154
combined assets
Pipe Segments
200
2.85 miles
Avg Diameter
30.7"
RCP typical

How This Works

StormSight analyzes spacing gaps between detected assets using municipal engineering standards (max 325 ft for 21" pipe). When gaps exceed the threshold, we predict missing infrastructure and size connecting pipes using the Rational Method for peak flow (Q = CiA) and Manning's Equation for pipe diameter. Every prediction shows its full reasoning chain.

Sample Predictions
6 of 324
GE-SD-1P-1GE-SD-9
Standard Max: 325 ftDetected Gap: 725 ft (2.2x)
Gap of 725 ft detected between google-earth-sd-1 and google-earth-sd-9 (max 325 ft for 21" pipe). High confidence prediction — distance is 2.2x the standard spacing.
Diameter
36"
Material
RCP
Flow Capacity
30.58 cfs
Length
29 ft
Nearest-neighbor connection (29 ft). Pipe sized for 4 sub-catchment(s) draining 14.0 acres. Rational Method Q = 30.58 cfs → Manning's D = 36". Assumed 1975-era RCP construction (~51 yr old).
Diameter
21"
Material
RCP
Flow Capacity
7.65 cfs
Length
97 ft
Nearest-neighbor connection (97 ft). Pipe sized for 1 sub-catchment(s) draining 3.5 acres. Rational Method Q = 7.65 cfs → Manning's D = 21". Assumed 1975-era RCP construction (~51 yr old).
02

Terrain & Elevation

Elevation analysis of detected infrastructure assets

Elevation Range
883-988 ft
Total Relief
105 ft

Highest to lowest asset

Highest Asset
987.5 ft

Fire hydrant, Duvall Dr

Lowest Asset
882.5 ft

Manhole, Broadway Ct

Topographic Cross-Section

883909935961988984 ft988 ft968 ft974 ft945 ft889 ft883 ft922 ftWest \u2192 East (Longitude)Elevation (ft)

Water flows northeast toward the Kishwaukee River

With 105 feet of relief across the municipality, stormwater generally flows from the higher southwestern areas (near Duvall Drive at 988 ft) toward the lower northeastern portions (Broadway Court at 883 ft), draining toward the Kishwaukee River system.

Asset Elevation Register

Asset IDTypeRoadElev (ft)
9951552003fire hydrantDuvall Drive987.5
9951727657fire hydrantUS 14984.3
9951677624fire hydrantWest South Street974.4
9951677622fire hydrantWest South Street967.8
12476540821fire hydrantFremont Street944.9
2890074696manholeNorth Fleming Road921.9
13628849229manholeSpringcreek Lane889.1
13628849236manholeBroadway Court882.5
03

Flood Risk Analysis

FEMA NFIP claims history and flood zone mapping

78of89

mapped features fall within a Special Flood Hazard Area (SFHA), indicating extreme flood exposure

Woodstock Claims
24

NFIP claims (60098 ZIP)

Woodstock Payout
$288,148
County Claims
954

McHenry County total

County Payout
$6.98M

Flood Zone Distribution

Zone A
59 features
Zone AE
17 features
AE (Floodway)
2 features
X (0.2%)
8 features
X (Minimal)
3 features

Top Flood Years

165claims
2013
115claims
1979
104claims
1993
91claims
2007
91claims
2017

NFIP Claims by Year — Woodstock (ZIP 60098)

24 total claims in Woodstock with $288,148 in payouts. Rose bars indicate top flood years.

County Context — McHenry County (954 total claims, $6.98M)

County-wide claims for context. Major flood events in 2013 (165), 1979 (115), 1993 (104).

04

Regulatory Compliance

EPA ECHO permit status and compliance tracking

CWA Permits
14

In Woodstock

MS4 Permits
4

In McHenry County

Max Quarters in NC
12

Algonquin Township (SNC)

Woodstock SNC
No

0 quarters in non-compliance

ADVISORY

Woodstock does not have its own MS4 permit

The city may rely on county or township MS4 coverage. There are 4 MS4 permits in McHenry County, none issued directly to Woodstock. This could limit eligibility for certain grant programs that require an active MS4 permit.

Woodstock CWA Facilities (14)

Permit IDFacility NameStatus
ILR10ZGAW10714 BULL VALLEY RD PONDEffective
ILR10ZDYB1400 FLEMING ROADEffective
ILR10ZCFK1811 N QUEEN ANNE RDEffective
ILR10ZD38ALLENDALE ROAD NEW POLE BARNEffective
ILR10E249APPLE CREEK ESTATESTerminated
ILR10C192APPLE CREEK ESTATESTerminated
ILR10ZDFUARMSTRONG SOLAR IL, LLCTerminated
ILR006817ARNTZEN CORPORATIONExpired
ILR10ZFDJASD WILDCAT IL SOLAR LLCEffective
ILR10I604BROWN PRINTING COMPANYTerminated
ILP000396CATALENT PHARMA SOLUTIONS INCPending
ILP000397CHARTER DURA-BAR INCPending
IL0080079CHARTER DURA-BAR INCEffective
ILR10H782COBBLESTONE WAYExpired

McHenry County MS4 Permittees (4)

Permit IDEntityStatusSNCQtrs NC
ILR400002ALGONQUIN TOWNSHIPExpired Yes12
ILR400278ALGONQUIN, VILLAGE OFExpired No0
ILR400310CARY, VILLAGE OFExpired No0
ILR400179CRYSTAL LAKE, CITY OFExpired No0
05

Vendor Intelligence

7 vendors

Engineering firms identified from Woodstock city council board meeting minutes

Meetings Analyzed
10
Stormwater Mentions
14
Unique Vendors
7
Total Contract Value
$15.3M

Vendor Leaderboard

01Builders Paving, LLC
Illinois1 contract2025-06 — 2025-06
street resurfacingroad reconstruction
$8.3M
02Manusos General Contracting, Inc.
Fox Lake, IL1 contract2024-11 — 2024-11
wastewater treatment plant construction
$4.7M
03Mauro Sewer Construction, Inc.
Illinois1 contract2025-06 — 2025-06
watermain replacementstreet reconstruction
$1.3M
04Cahoy Pump Service
Durand, IL1 contract2024-05 — 2024-05
water well drilling
$497K
05Trotter and Associates, Inc.
Saint Charles, IL3 contracts2024-11 — 2025-06
wastewater treatment construction managementwatermain designstreet improvement design
$392K
06Baxter & Woodman, Inc.B&W
Crystal Lake, IL2 contracts2023-02 — 2025-06
water system master planninggroundwater well engineeringwatermain design consulting
$119K
07Sikich LLP
Illinois1 contract2024-11 — 2024-11
financial audit
N/A

Stormwater Meeting Activity

May 7, 2024City Council Regular MeetingMinutes
postponed
FY24/25 Sewer Cleaning and Televising
ongoing advocacy
Route 47 Water/Sewer Infrastructure$16.0M
Nov 19, 2024City Council Regular MeetingMinutes
approved
South Wastewater Treatment Plant - Phosphorus Improvements$5.1M
informational
Future Water/Sewer Regulatory Concerns
informational
Kishwaukee River Water Quality
Dec 5, 2024City Council Regular MeetingMinutes
approved
Water and Sewer Rate Amendments$14.0M
Jun 3, 2025City Council Regular MeetingMinutes
approved
Gould Street Watermain & Street Replacement$1.3M
approved
2025 Enhanced Streets Improvement Program$8.3M
Oct 21, 2025City Council Regular MeetingMinutes
grant secured
Route 47 Widening - $10M State Infrastructure Grant$16.0M
Nov 4, 2025City Council Regular MeetingMinutes
approved
Tax Abatement - Waterworks Improvements (Series 2025)

Key Infrastructure Staff

Roscoe C. Stelford III
City Manager
City Manager's Office
Christina Betz
Executive Director of Operations
Operations
Brent Aymond
Public Works Director
Public Works
Chris Tiedt
Engineering Director
Development Services - Engineering
Mike Rousey
Utilities Manager
Utilities
Michael Turner
Mayor
City Council
06

StormSight Score

Composite assessment of stormwater infrastructure health

D60/100

Overall Score: 59.8/100

This municipality received an overall StormSight grade of D (59.8/100), indicating below-average stormwater infrastructure health requiring attention. Key strengths include low flood exposure, regulatory compliance, grant eligibility. Areas of concern: significant gaps in infrastructure documentation; limited maintenance vendor ecosystem. With a population of 26,084 across 10.6 square miles, this community's stormwater needs are moderate.

Infrastructure Density
13

2.8 assets/sq mi is far below the benchmark of 22. Major data gaps likely exist.

Weight: 15%
Impervious Coverage
50

Impervious surface data not yet available. Score reflects uncertainty.

Weight: 15%
Flood Risk
89

Low flood risk. 24 total NFIP claims (0.9 per 1,000 residents) is below the regional average.

Weight: 20%
Compliance Health
88

Clean compliance record with 0 quarters in violation. Last inspection: Unknown.

Weight: 20%
Maintenance Readiness
0

No vendor or maintenance data available from public records. Score reflects limited visibility.

Weight: 15%
Grant Readiness
100

Strong grant readiness: 8 eligible programs totaling up to $661.8M in available funding.

Weight: 15%
Funding Opportunities
8 matched

FEMA Flood Mitigation Assistance (FMA)

50%

Federal Emergency Management Agency

Up to $30.0M · grant

Federal program available to all states. Properties within flood hazard areas. High flood claim history (24 claims) aligns with program focus

Learn more

FEMA Building Resilient Infrastructure and Communities (BRIC)

35%

Federal Emergency Management Agency

Up to $50.0M · grant

Federal program available to all states. High flood claim history (24 claims) aligns with program focus

Learn more

FEMA Hazard Mitigation Grant Program (HMGP)

30%

Federal Emergency Management Agency

Federal program available to all states. High flood claim history (24 claims) aligns with program focus

Learn more

Illinois EPA CWSRF (Water Pollution Control Loan Program)

30%

Illinois Environmental Protection Agency

Up to $30.0M · forgivable loan

Located in eligible state (IL)

Learn more

Illinois Green Infrastructure Grant Program (IGIG)

30%

Illinois Environmental Protection Agency

Up to $0.8M · grant

Located in eligible state (IL)

Learn more

EPA Clean Water State Revolving Fund (CWSRF)

20%

U.S. Environmental Protection Agency

Up to $50.0M · loan

Federal program available to all states

Learn more

EPA Water Infrastructure Finance and Innovation Act (WIFIA)

20%

U.S. Environmental Protection Agency

Up to $500.0M · loan

Federal program available to all states

Learn more

EPA Section 319 Nonpoint Source Management Program

20%

U.S. Environmental Protection Agency

Up to $1.0M · grant

Federal program available to all states

Learn more
StormSight Community Edition — Data sourced from EPA ECHO, FEMA OpenData, Census Bureau, and OpenStreetMap
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