HomeMy WebLinkAboutPY6 Catchment Investigations Memo40 Shattuck Road | Suite 110
Andover, Massachusetts 01810
www.woodardcurran.com
T 800.426.4262
T 978.557.8150
F 978.557.7948
MEMORANDUM
TO: John Livsey, Director of Public Works – Town of Lexington
Marissa Liggiero, Senior Civil Engineer – Town of Lexington
FROM: Garrett Bergey, Project Manager – Woodard & Curran
James Sharrard, Technical Manager – Woodard & Curran
Margaret Byrne, Project Scientist – Woodard & Curran
Leah Finn-Erb, Technical Specialist – Woodard & Curran
DATE: July 9, 2024
RE:MS4 General Permit Compliance Illicit Discharge Detection and Elimination
Program Permit Year 6 Catchment Investigation Summary
EXECUTIVE SUMMARY
Between July 2023 and October 2023, drainage infrastructure within twenty-eight catchments
in the Town of Lexington, Massachusetts (Town) were inspected during dry weather conditions
for evidence of non-stormwater discharges. Results are summarized in the following findings:
Potential Illicit Discharges
•Dry weather flow sampled from two of the investigated catchments, DMH-0128 and
OF-0078, contained concentrations of ammonia, surfactants, and chlorine above MS4
General Permit (Permit) potential illicit discharge threshold criteria.
Potential Illicit Discharge Parameter(s) Below Permit Threshold Criteria
•Drainage infrastructure within nine investigated catchments contained concentrations
of illicit discharge parameters (ammonia, chlorine, and/or surfactants) detected in flow
below combined Permit threshold criteria. These detections do not require additional
investigation under the Permit requirements. However, the Town may want to
periodically revisit areas with detections above individual Permit threshold criteria
during dry weather conditions to verify whether potential sewage or non-stormwater
related discharges are present.
No Potential Illicit Discharges
•Drainage infrastructure within the seventeen remaining investigated catchments
contained no concentrations of illicit discharge parameters (ammonia, chlorine, and/or
surfactants) above the Permit threshold criteria. No further investigation of these
catchments is required except where noted.
Lexington, MA (0227871.17) 2 Woodard & Curran, Inc.
Lexington, MA MS4 PY6 Catchment Investigation Memo July 2024
Additional Recommendations
It is recommended that the Town:
•Investigate all instances where structures were unable to be located in the field or were
found to deviate from existing mapping. If investigation results in significant alterations
to mapping, further IDDE investigation may be required.
•Maintain all infrastructure found to contain standing water.
Catchment investigation prioritizations have been updated based on the information provided
in this memorandum. Additional illicit discharge detection and elimination (IDDE) activities
should be conducted in the two catchments with potential illicit discharges that are listed above
to identify and mitigate non-stormwater discharges to the Town’s drainage system, if present,
per the recommendations presented in this memorandum.
Refer to Attachment B and Attachment C for specific locations where investigation and/or
maintenance is recommended.
PURPOSE AND BACKGROUND
This memorandum describes the results of IDDE investigations performed in the Town of
Lexington, MA (Town) during Permit Year (PY) 6 within twenty-eight catchments. This
memorandum is intended to fulfill Permit Part 2.3.4.8.c.iii, which requires all data collected as
part of catchment investigations to be recorded and reported annually.
Dry weather outfall screening and sampling results obtained for the Town’s outfalls screened
during previous IDDE investigations were initially used to prioritize the order of catchment
investigations. Catchments where potential illicit discharge indicators were detected above
individual Permit threshold criteria in dry weather flow collected from outfalls were assigned an
elevated prioritized for future investigation. The remaining catchments were assigned a low
priority for investigation due to no observed dry weather flow or no detections of potential
illicit discharge parameters in sampled flow.
Drainage infrastructure within the following twenty-eight catchments was investigated during
the period discussed in this memorandum:
•DMH-01281 •OF-0077 •OF-0394
•DMH-1045 •OF-00781 •OF-0399
•OF-0032 •OF-0080 •OF-0400
•OF-0034 •OF-0114 •OF-0401
•OF-0036 •OF-0188 •OF-0402
•OF-0046 •OF-0287 •OF-0403
•OF-0054 •OF-0327 •OF-0435
•OF-0056 •OF-0362 •OF-0437
•OF-0057 •OF-0363
•OF-0059 •OF-0382
Notes:
1. Additional investigations are required to determine source(s) of potential illicit discharge(s).
Lexington, MA (0227871.17) 3 Woodard & Curran, Inc.
Lexington, MA MS4 PY6 Catchment Investigation Memo July 2024
IDDE INVESTIGATION METHODOLOGY
Between July 2023 and October 2023, SDE, Inc. performed catchment investigations following
the methodology in Permit Part 2.3.4.8.c.ii.1.c-d (Catchment Investigations) and the Town’s
IDDE Program Manual.
Drain manholes, and in some cases, catch basins were opened and visually inspected to
determine the presence or absence of dry weather flow and visible and/or olfactory indicators
of sewage. Where flow was observed, samples were collected and screened for potential illicit
discharge indicators using field test kits. Select samples were also submitted for laboratory
ammonia analysis. General observations related to infrastructure condition were also recorded
when structures were accessed as presented in Attachment C.
In general, drainage infrastructure was investigated throughout the drainage network starting
upstream and working downstream (outfall) to understand the relationship between potential
upstream contamination on downstream water quality. Where field test kits detected
concentrations of potential illicit discharge parameters above Permit threshold criteria in dry
weather flow, nearby infrastructure was accessed and screened to bracket the source of
potential illicit discharges for future investigations.
Building and/or infrastructure dye tests were not performed during this round of catchment
investigations. Generally, dye testing is used in some locations where visual evidence of sewer
impacts or potential illicit discharges is identified in drainage infrastructure once the extent of
impacts have been bracketed. During the dye test non-toxic dye is introduced to either
plumbed fixtures within building(s) or sanitary sewer manholes adjacent to identified impacted
drainage infrastructure to determine whether dye is visible in the drainage infrastructure.
Information obtained during catchment investigation activities was recorded in ESRI’s ArcGIS
Field Maps application. This information is available in the geographic information system (GIS)
setup by Woodard & Curran and shared with the Town.
DRY WEATHER SCREENING DATA EVALUATION CRITERIA
Permit Part 2.3.4.8.c.ii.1.c-d requires drainage infrastructure investigations during dry weather
flow. Where dry weather flow is present, it is typically sampled using field test kits for the
presence of ammonia, surfactants, and chlorine. In some cases, dry weather flow is sampled for
bacteria; however, this is not required during catchment investigations and no bacteria samples
were collected during the catchment investigations described in this memorandum.
In accordance with the MS4 General Permit, flow is considered likely to contain illicit discharges
from sanitary sources if dry weather screening indicates:
•Olfactory or visual evidence of sewage;
•Ammonia ≥0.5 parts per million (ppm), surfactants ≥0.25 ppm, and bacteria ≥ water
quality standards; or
•Ammonia ≥0.5 ppm, surfactants ≥0.25 ppm, and detectable chlorine.
Lexington, MA (0227871.17) 4 Woodard & Curran, Inc.
Lexington, MA MS4 PY6 Catchment Investigation Memo July 2024
Dry weather sample screening results obtained during catchment infrastructure investigations
were compared against these criteria to determine the potential presence of illicit discharges.
In addition, test kit results where ammonia, surfactants and/or chlorine are detected above their
individual Permit threshold criteria but below the combined Permit criteria for potential illicit
discharges can be potential indicators of other illicit discharges, such as swimming pool
dewatering discharges, vehicle/equipment wash waters, incorrectly connected washing
machine laterals, or diluted flow from sewer-related sources. These types of potential illicit
discharge indicators are not typically regulatory drivers for additional investigations, but
investigations may be warranted depending on a variety of factors such as the proximity of the
corresponding drainage pipe(s) to identified potential illicit discharges, the location of the
catchment outfall in relation to sensitive receptors, and other community-specific factors. This
data and the infrastructure should be reviewed on a case-by- case basis to determine whether
non-Permit drivers are present that would warrant further investigation.
CATCHMENT INVESTIGATION RESULTS
An evaluation of the dry weather flow screening results identified potential sewer-related illicit
discharges to drainage infrastructure in two of the twenty-eight investigated catchments. In
general, potential illicit discharges were isolated to specific drainage pipe segments, as shown
on the figures in Attachment A. A summary of the drainage system infrastructure investigation
findings is provided in Table 1, below.
Note that “complete” drainage system infrastructure investigation statuses refer to
investigation of the Town-owned drainage infrastructure located within the system and not the
confirmation of location and removal of illicit discharges that may be present in sanitary sewer
or private infrastructure discharging to the MS4.
TABLE 1: SUMMARY OF CATCHMENT INVESTIGATION RESULTS
Catchment
ID
Drainage System
Infrastructure
Investigation Status
Notes
Potential Illicit Discharge(s) Detected
DMH-0128 Complete1 Ammonia, surfactants, and chlorine detected in one drainage
pipe segment. Additional source investigations are required.
OF-0078 Complete1
Ammonia, surfactants and chlorine detected in one drainage
pipe segment. The pipe was subsequently re-investigated and
was observed with standing water. The initial inspection
indicating potential illicit discharge should be further
investigated. Additional source investigations are required.
Catchments with Potential Illicit Discharge Parameter(s) Detected Below Permit Threshold
Criteria
OF-0046 Partial4 Chlorine detected in two drainage pipe segments above
Permit individual threshold criteria.
OF-0057 Complete3 Ammonia and surfactants detected in one drainage pipe
segment above Permit individual threshold criteria.
Lexington, MA (0227871.17) 5 Woodard & Curran, Inc.
Lexington, MA MS4 PY6 Catchment Investigation Memo July 2024
Catchment
ID
Drainage System
Infrastructure
Investigation Status
Notes
Catchments with Potential Illicit Discharge Parameter(s) Detected Below Permit Threshold
Criteria
OF-0077 Partial 2, 4 Chlorine detected in one drainage pipe segment abovePermit individual threshold criteria.
OF-0080 Complete3 Chlorine detected in one drainage pipe segment above
Permit individual threshold criteria.
OF-0114 Partial4 Chlorine detected in one drainage pipe segment above
Permit individual threshold criteria.
OF-0188 Complete3 Surfactants and/or chlorine detected in four drainage pipe segments above Permit individual threshold criteria.
OF-0363 Complete3 Surfactants detected in one drainage pipe segment above Permit individual threshold criteria.
OF-0400 Complete3 Surfactants and/ or chlorine detected in two drainage pipe
segments above Permit individual threshold criteria.
OF-0437 Complete3 Chlorine detected in four drainage pipe segments above
Permit individual threshold criteria.
Catchments with No Potential Illicit Discharges Detected
DMH-10456 OF-00325 OF-00345 OF-00365 OF-00544 OF-00565
OF-00594 OF-02874 OF-03275 OF-03625,7 OF-03824 OF-03945
OF-03995 OF-04015 OF-04025 OF-04035 OF-04354 --
Notes:
1. Additional investigations are required to determine source(s) of potential illicit discharge(s).
2. Additional mapping is required to determine pipe configurations.
3. Pipe segments have been substantially investigated and no further catchment investigations are
required. Some pipe segments contain concentrations of potential illicit discharge parameters
below Permit criteria.
4. Additional catchment investigations are required to complete drainage pipe investigations.
5. Pipe segments have been substantially investigated and no further catchment investigations are required.
6. Pipe segments investigated during PY6 investigations were cleared, but pipes with positive test kits were found
during previous investigations.
7. All pipe segments in this catchment contain either standing water or are partially inspected. Maintenance
should be conducted.
A table summarizing screening results obtained during catchment investigations is provided in
Attachment B, and a table summarizing surficial drainage infrastructure noted during
catchment investigations is provided in Attachment C.
CONCLUSIONS AND RECOMMENDATIONS
Catchments with Identified Potential Illicit Discharges
Potential illicit discharges have been identified in flow sampled from drainage infrastructure in
the following catchments, which will require additional investigation to determine the source(s)
Lexington, MA (0227871.17) 6 Woodard & Curran, Inc.
Lexington, MA MS4 PY6 Catchment Investigation Memo July 2024
of identified indicator parameters: DMH-0128 and OF-0078. Specific recommendations
regarding these catchments are provided below.
DMH-0128
Ammonia, surfactants, and chlorine were detected above potential illicit discharge criteria in
dry weather flow collected from the northeast inlet of DMH-0018 (DGM-0447) at Lexington
High School on Waltham Street. During prior investigations conducted in 2019, pipe segment
DGM-0450, which is immediately upstream of pipe segment DGM-0447, could not be located.
There were no inlets observed in DMH-0021 during this initial investigation indicating that
DMH-0021 is the drain starter. The issue here appears to originate in DGM-0047. Typically, the
recommendation for this scenario would be dye testing the adjacent infrastructure. Given that
the adjacent building is the Lexington High School, additional laboratory sampling (E. coli,
surfactants, total and human Bacteroides) should be conducted to verify the contamination. If
follow up sampling indicates a potential illicit discharge then dye testing will be recommended.
OF-0078
Ammonia, surfactants, and chlorine were detected above potential illicit discharge criteria in
dry weather flow collected from the northeast inlet of DMH-0871 (DGM-2945) at the
intersection of Fairlawn Lane and Fiske Road. This pipe segment was later revisited and standing
water was observed. DGM-2945 should be returned to determine if the pipe contains flow or
standing water. The pipe segment directly upstream (DGM-2943) of DGM-2945 on Fairlawn
Lane was cleared indicating that the contamination likely originates in DGM-2945. However,
the standing water present during the second inspection makes it difficult to verify that for
certain. It is recommended the Town removes standing water in this pipe in order to bracket
the source of contamination. If the Town is unable to remove standing water upstream, dye
testing of the adjacent buildings area should be complete.
Catchments with Non-Stormwater Parameters Below Combined Permit Threshold
Criteria
Dry weather flow sampled from drainage infrastructure in the nine catchments listed in Table
1 contained concentrations of one or more illicit discharge indicator parameters above
individual Permit threshold criteria but below the combined Permit threshold criteria for
potential illicit discharges.
Although these detections do not require additional catchment investigation under the Permit,
the Town may consider investigating these locations in the future once investigations are
completed in higher priority catchments. In some cases, detection of individual illicit discharge
criteria can indicate a dilute source of an illicit discharge in the vicinity.
Catchments Cleared of Potential Illicit Discharges
Drainage infrastructure has been substantially investigated and no potential illicit discharges or
positive test kit detections have been identified in the 17 catchments listed in Table 1. No
further catchment investigations are recommended in these catchments.
Lexington, MA (0227871.17) 7 Woodard & Curran, Inc.
Lexington, MA MS4 PY6 Catchment Investigation Memo July 2024
Partial drainage infrastructure investigations have been conducted in the five catchments listed
in Table 1 with no potential illicit discharges identified. Catchment investigations will resume
in these catchments during future field efforts.
MAINTENANCE AND MAPPING RECOMMENDATIONS
Standing water was observed in pipe segments within several catchments, as depicted on
figures in Attachment A and in the summary tables in Attachment B and Attachment C.
Locations where standing water have been identified should be maintained and/or evaluated
to determine and abate the cause to promote adequate drainage through the catchment. After
maintenance has been completed, these catchments should be revisited to attempt to
complete catchment investigations.
Additionally, drainage infrastructure within some catchments appears to be incompletely
mapped, as noted in Table 1. These catchments may require further investigation if new
structures are identified that have not been representatively inspected during the investigations
summarized in this memorandum.
GENERAL RECOMMENDATIONS
Additional IDDE activities should be conducted in the catchments with potential illicit
discharges that are listed above to identify and mitigate non-stormwater discharges to the
Town’s drainage system. Verified illicit discharges should be addressed in accordance with the
Town’s IDDE Program Manual and applicable regulations. Upon remediation of an illicit
discharge, the associated outfall should be rescreened within one year during dry weather to
verify no potential illicit discharge indicators at the catchment discharge point.
Lexington, MA (0227871.17) Woodard & Curran, Inc.
Lexington, MA MS4 PY6 Catchment Investigation Memo July 2024
ATTACHMENT A: CATCHMENT INVESTIGATION FIGURES
CB-0013
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Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT DMH-0128
0 330165
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
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Culvert
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Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT DMH-1045
0 310155
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
DMH-0206
DMH-0509
DMH-0510
DMH-0511
DMH-0513
DMH-0515
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OF-0032
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Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0032
0 13065
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
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Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0034
0 300150
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
DMH-0519
DMH-0528
DMH-0530
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Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0036
0 11055
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
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Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0046
0 310155
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
DMH-0646
DMH-0647
DMH-0648
DMH-0649
DMH-0658
DMH-0659
DMH-0660
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Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0054
0 210105
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
DMH-0655
DMH-0656
DMH-0657
DMH-0661
DMH-0662
DMH-0664
DMH-0665
DMH-1998
DMH-1999
DMH-2000
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CB-2136
CB-2134
CB-2123
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CB-2125
CB-2149
CB-2193
CB-8073
CB-7743
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CB-2135
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CB-2114
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CB-2142
CB-2110
CB-2138
CB-2139
CB-2112 CB-2111
Unknown
OF-0056
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0056
0 16080
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
CB-7587
CB-2151
CB-2703
CB-2155
CB-2199
CB-2149
CB-2691
CB-2688
CB-2144
CB-2175
CB-2169
CB-2206
CB-2694
CB-2191
CB-2173
CB-2146
CB-2188
CB-2156
CB-2160
CB-2696
CB-2153
CB-2171
CB-3124
CB-2198
CB-2159
CB-2152
CB-2176
OF-0057
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0057
0 360180
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
CB-2140
CB-3030
CB-7587
CB-2151
CB-7740
CB-3099
CB-3098
CB-3108
CB-2703
CB-2155
CB-2195
CB-2143
CB-3032
CB-2704
CB-3033
CB-2149
CB-2691
CB-2693
CB-2688
CB-2144
CB-2175
CB-2169
CB-2162
CB-3106CB-3103
CB-2173
CB-2196
CB-2146
CB-2163
CB-3100
CB-2167
CB-2156
CB-2160
CB-2696
CB-2153
CB-2164
CB-3135
CB-2171
CB-7734
CB-3124
CB-2170
CB-2708
CB-2159
CB-2139
CB-3028
CB-3111
CB-7598
Unknown
Culvert
OF-0078
OF-0057
OF-0059
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0059
0 380190
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
CB-7587
CB-2151
CB-2703
CB-2155
CB-2199
CB-2149
CB-2691
CB-2688
CB-2144
CB-2175
CB-2169
CB-2206
CB-2694
CB-2191
CB-2173
CB-2146
CB-2188
CB-2156
CB-2160
CB-2696
CB-2153
CB-2171
CB-3124
CB-2198
CB-2159
CB-2152
CB-2176
OF-0057
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0077
0 360180
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
OF-0078 OF-0057
OF-0059
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0078
0 630315
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
DMH-0845
DMH-0849
DMH-0850
DMH-0851
DMH-0852
DMH-1753
DMH-1754
CB-3064
CB-3039
CB-3042
CB-3057
CB-0690
CB-3048
CB-0686
CB-0691
CB-3063
CB-3043
CB-3040CB-3045
CB-3065
CB-3068
CB-3046
CB-3067
CB-3044
CB-3058
CB-3066
CB-3062
CB-3059
CB-3060
Unknown
Culvert OF-0080
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0080
0 200100
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
CB-0887
CB-3269
CB-3783
CB-3729
CB-7744
CB-0884
CB-0885
CB-3672
CB-3706
CB-0924
CB-3777
CB-3778
CB-3792
CB-7754
CB-7753
CB-3715
CB-3725
CB-3737
CB-3733
CB-7878
CB-0888
CB-0893
CB-0909
CB-3779
CB-0902
CB-0620
CB-3719
CB-3704
CB-3697
CB-3698
CB-3727
CB-3673
CB-0905
CB-0906
CB-3274
CB-3722
CB-3776
CB-3273
CB-3750
CB-3711
CB-3713
CB-3784
CB-3721
CB-0904
CB-0890
CB-3710
CB-3731
CB-3716
CB-3781
CB-3712
CB-3692
CB-3691
CB-3693
CB-3694
CB-0908
CB-3709
CB-3708
CB-3696
CB-3700
CB-3271
OF-0114
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0114
0 420210
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
Headwall
Headwall
Headwall
OF-0188
OF-0146
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0188
0 520260
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
CB-1897
CB-1899
CB-2054
CB-2058
CB-2057
CB-2063
CB-2059
CB-2043
CB-2133
CB-2073
CB-2066
CB-2071
CB-2062
CB-1929
CB-2078
CB-2035 CB-2069
CB-2040
CB-7980
CB-1920
CB-1926
CB-2214
CB-7741
CB-7137
CB-1924
CB-2088
CB-2075
CB-2055
CB-2103
CB-1932
CB-2222
CB-2215
CB-1921
CB-2039
CB-2051
CB-1931
CB-2045
CB-2065
CB-2101
CB-2048
CB-2047
CB-7745
CB-2042
CB-2046
CB-2108
CB-1928
CB-1896
CB-2072
CB-2061
CB-2104
CB-2038
CB-2037
CB-2105
CB-2056
CB-1898
CB-2080
CB-2068
CB-1901
CB-7850
CB-1927
Unknown
OF-0287
OF-0382OF-0382
OF-0394
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0287
0 310155
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
DMH-0827
DMH-1945
DMH-0825
DMH-0824
DMH-0826
CB-2902
CB-2907
CB-2908
CB-2900
CB-3023
CB-2904
CB-2650
CB-2649
CB-2901
CB-2906
CB-2903
CB-2905
OF-0327
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0327
0 12060
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
DMH-1452
CB-5674
CB-5673
CB-5675
CB-5672
Headwall
OF-0362
OF-0363
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0362
0 14070
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
DMH-1452
DMH-1453
DMH-1454
DMH-1455
DMH-1458
DMH-1459
CB-5676
CB-5674
CB-5689
CB-5678
CB-5673
CB-5681
CB-5688
CB-5680
CB-7187
CB-5675
CB-5691
CB-5690
Headwall
Headwall
OF-0362
OF-0363
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0363
0 210105
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
DMH-0643
DMH-0644
DMH-0645
DMH-0646
DMH-0650
DMH-0653DMH-0654 DMH-0652
DMH-0627DMH-0627DMH-0627DMH-0628DMH-0629DMH-0629
DMH-0630
DMH-0631
DMH-0632
DMH-0633
DMH-0634
DMH-0635
DMH-0637
DMH-0638
DMH-0639
DMH-0640
DMH-0641
DMH-0642
DMH-1749
DMH-1750
DMH-1751
DMH-1752
CB-2218
CB-2054
CB-2058
CB-2057
CB-2063
CB-2098
CB-2059
CB-2043
CB-2133
CB-2073
CB-2066
CB-2071
CB-2062
CB-7327
CB-2078
CB-2069
CB-2040
CB-7980
CB-7985
CB-7989
CB-2092
CB-2214
CB-7741
CB-7137
CB-1924
CB-2044
CB-2088
CB-2075
CB-2055
CB-2215
CB-1921
CB-2051
CB-2045
CB-2065
CB-2100
CB-2048
CB-2047
CB-2219
CB-7745
CB-2046
CB-2072
CB-2061
CB-2105
CB-2056
CB-2068
OF-0287
OF-0382OF-0382 OF-0394
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0382
0 275137.5
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
OF-0394
DMH-0633
DMH-0634
DMH-0635
DMH-0639
DMH-0640
DMH-1749
DMH-1750
DMH-1751
DMH-1752
CB-2218
CB-2059
CB-2214
CB-2055
CB-2215
CB-2220
CB-2216
CB-2219
CB-2061
CB-2049
CB-2056
CB-2223
CB-2068
CB-2213
Unknown
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0394
0 250125
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
OF-0401
OF-0399
DMH-1757
DMH-1758
DMH-1762
DMH-1763
CB-0700
CB-0714
CB-0699
CB-0713
CB-0711
CB-0712
Culvert
Culvert
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0399
0 12060
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
OF-0400
OF-0401
OF-0399
DMH-1758
DMH-1759
DMH-1760
DMH-1761
DMH-1762
DMH-1763
DMH-1776
DMH-1777
DMH-1778
CB-0700
CB-0736
CB-0742
CB-0735
CB-0737
CB-0699
CB-0709
CB-0753
CB-0741
CB-0702
CB-0740
CB-0743
CB-0739
CB-0710
CB-0711
CB-0701
CB-0712
Culvert
Culvert
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0400
0 18090
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
OF-0401
OF-0399
DMH-0217
DMH-1758
DMH-1763
DMH-1764DMH-1765
DMH-1766
DMH-1767
DMH-1768
DMH-1776
DMH-1777
CB-0704
CB-0706
CB-0700
CB-0707
CB-0660
CB-0703
CB-0736
CB-0735
CB-0699
CB-0702
CB-0708
CB-0705
CB-0749
CB-0701
CB-0750
Culvert
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0401
0 280140
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
OF-0402
OF-0403
DMH-1766
DMH-1767
DMH-1768
DMH-1769
DMH-1770
DMH-1771
DMH-1772
DMH-1773
DMH-1774
DMH-1775
DMH-1776
DMH-1777
DMH-1779
CB-0706
CB-0707
CB-0738
CB-0731
CB-0733
CB-0767
CB-0768
CB-0734
CB-0730
CB-0732
CB-0736
CB-0729
CB-0735
CB-0737
CB-0728
CB-0708
CB-0705
CB-0749
CB-0727
CB-0748
CB-0747
CB-0750
Culvert
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0402
0 320160
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
OF-0400
OF-0403
DMH-1759
DMH-1760
DMH-1761
DMH-1762
DMH-1771
DMH-1772
DMH-1773
DMH-1774
DMH-1775
DMH-1776
DMH-1777
DMH-1778
CB-0738
CB-0731
CB-0733
CB-0734
CB-0730
CB-0732
CB-0736
CB-0742
CB-0729
CB-0735
CB-0737
CB-0709
CB-0753
CB-0728
CB-0741
CB-0740
CB-0743
CB-0739
CB-0727
CB-0710
CB-0711
Culvert
Culvert
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0403
0 230115
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
OF-0437
OF-0435
CB-5763
CB-5683
CB-5684
CB-5715
CB-5701
CB-5706
CB-7702
CB-5728
CB-5727
CB-5781
CB-5783
CB-5741
CB-7330
CB-5725
CB-5738
CB-7329
CB-5731
CB-5678
CB-5686
CB-5767
CB-5732
CB-5745
CB-5740
CB-5687
CB-5734
CB-5744
CB-5685
CB-5681
CB-7703
CB-5723
CB-5717
CB-7187
CB-5784
CB-5704
CB-5691
CB-5721
CB-5702
CB-7571
CB-5697
CB-5719
CB-5720
CB-7572
CB-5698
CB-5692
CB-5700
CB-5710
CB-5714
CB-5708
CB-5712
CB-5709
Headwall
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0435
0 500250
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
OF-0437
OF-0362
OF-0435
OF-0363
DMH-1452
DMH-1453
DMH-1454
DMH-1455
DMH-1456
DMH-1457
DMH-1458
DMH-1459
DMH-1460
DMH-1461
DMH-1462
DMH-2044
CB-5676
CB-5683
CB-5684
CB-5701
CB-5674
CB-5689
CB-5678
CB-5673
CB-5686
CB-5687
CB-5685
CB-5681
CB-7186
CB-5688
CB-5680
CB-7187
CB-5691
CB-5690
CB-7572
CB-5698
CB-7573
CB-5692
Headwall
Headwall
¯
Third Party GIS Disclaimer: This map is for reference and graphical purposes only and should not be relied upon by third parties for any legal decisions. Any reliance upon the map or data contained herein shall be at the users’ sole risk. Data Sources: Town of Lexington, ESRI, Woodard & Curran, MassGIS, 2024.
Town of Lexington, MA
PERMIT YEAR 6
IDDE INVESTIGATIONS
CATCHMENT OF-0437
0 370185
Feet
Map Created: JULY 2024
Stormwater Assets
Not Tested
Planned
No Fixtures
Legal
No Dye Observed
Corrected
Dye in SMH & DMH
Not Legal
Building Dye Testing
Not Yet Inspected
Standing Water
Partial Inspection
Cleared
UpstreamContamination
Positive Test
SuspectedIllicit Discharge
Visual Evidence ofIllicit Discharge
IDDE Pipe Inspections byIllicit Discharge StatusOutfall
LegendCatch Basin Inspections
Inspected
Catch Basin
Catch Basin
Manhole Inspections
Inspected
Manhole
Manhole
Lexington, MA (0227871.17) Woodard & Curran, Inc.
Lexington, MA MS4 PY6 Catchment Investigation Memo July 2024
ATTACHMENT B: CATCHMENT INVESTIGATION SCREENING
RESULTS
Attachment B: Catchment Investigation Screening Results
MS4 General Permit Illicit Discharge Detection and Elimination Program
Permit Years 6 Catchment Investigation Summaries
Lexington, MA
Infrastructure ID Inspection Date Pipe ID Standing Water Flow Flow Color Velocity Ammonia (ppm)Surfactants (ppm)Chlorine (ppm)Comments
≥0.5 ppm1 ≥0.25 ppm1 ≥0.02 ppm2
DMH-0128
DMH-0018 10/3/2023 DGM-0447 No Yes Orange Slow 0-0.5 ft/sec 0.5 1.5 1.35 Laboratory samples collected for ammonia. Ammonia -
1.92 mg/L.
CB-4049 10/3/2023 DGM-7502 No Yes Colorless Medium 0.5-1.75 ft/sec <0.05 <0.125 <0.02
DMH-0515 8/3/2023 DGM-1616 Yes No N/A N/A ------
Pipe is mapped as extending from DMH-0513 to
DMH-0515. In the field, this is two discrete pipes. This
pipe inspection is for CB-1635: DMH-0515.OF-0032 8/1/2023 DGM-1620 Yes No N/A N/A ------
CB-1635 8/1/2023 DGM-1616 No No N/A N/A ------
Pipe is mapped as extending from DMH-0513 to
DMH-0515. In the field, this is two discrete pipes. This
pipe inspection is for DMH-0513:CB-1635.
OF-0034 9/5/2023 DGM-1653 Unknown Unknown N/A N/A ------Unable to access outfall.
CB-1667 9/5/2023 DGM-1652 No Yes Colorless Medium 0.5-1.75 ft/sec <0.05 <0.125 <0.02
OF-0036 8/1/2023 DGM-1670 No No N/A N/A ------
CB-1975 9/5/2023 DGM-1987 No No N/A N/A ------
CB-1969 9/5/2023 DGM-1999 No No N/A N/A ------
CB-1967 8/21/2023 DGM-2001 Yes No N/A N/A ------
CB-1967 8/21/2023 DGM-1994 No Yes Colorless Medium 0.5-1.75 ft/sec 0.2 <0.125 0.24
CB-1969 8/21/2023 DGM-8723 No No N/A N/A ------
CB-1973 8/21/2023 DGM-8720 No No N/A N/A ------
CB-1973 8/21/2023 DGM-1989 Yes No N/A N/A ------
CB-1973 8/21/2023 DGM-1992 No Yes Colorless Medium 0.5-1.75 ft/sec 0.3 <0.125 0.11
CB-1973 8/21/2023 DGM-8721 No No N/A N/A ------
CB-1975 8/21/2023 DGM-1988 No No N/A N/A ------
OF-0046 8/21/2023 DGM-2008 No Yes Colorless Medium 0.5-1.75 ft/sec <0.05 <0.125 <0.02
CB-8074 7/25/2023 DGM-2107 No No N/A N/A ------
CB-8074 7/25/2023 DGM-2098 No No N/A N/A ------
OF-0056 7/25/2023 DGM-2157 No No N/A N/A ------
CB-2154 10/3/2023 DGM-2180 No No N/A N/A ------
CB-2157 10/3/2023 DGM-2174 No No N/A N/A ------
CB-2151 10/3/2023 DGM-2176 Yes No N/A N/A ------
CB-2151 10/3/2023 DGM-2170 No No N/A N/A ------
OF-0057 10/3/2023 DGM-2172 No Yes Colorless Fast 1.75 ft/sec or Greater 1 0.5 <0.02
CB-2162 9/5/2023 DGM-2191 Yes No N/A N/A ------
CB-2167 9/5/2023 DGM-2190 No No N/A N/A ------
CB-2167 9/5/2023 DGM-2187 Yes No N/A N/A ------
OF-0059 8/21/2023 DGM-2193 Yes No N/A N/A ------
OF-0032
OF-0034
OF-0036
OF-0046
Single Sample Threshold Levels
DMH-1045
OF-0054
OF-0056
OF-0057
OF-0059
Lexington, MA (0227871.17)
Attach B - CI Results Page 1 of 4
Woodard Curran, Inc.
June 2024
Attachment B: Catchment Investigation Screening Results
MS4 General Permit Illicit Discharge Detection and Elimination Program
Permit Years 6 Catchment Investigation Summaries
Lexington, MA
Infrastructure ID Inspection Date Pipe ID Standing Water Flow Flow Color Velocity Ammonia (ppm)Surfactants (ppm)Chlorine (ppm)Comments
CB-2949 8/1/2023 DGM-2761 No Yes Colorless Unknown 0.4 <0.125 0.4
CB-2950 8/1/2023 DGM-2763 Yes No N/A N/A ------CB-2950 8/1/2023 DGM-2762 Yes No N/A N/A ------
OF-0077 8/1/2023 DGM-2765 Unknown Unknown N/A N/A ------Could not locate. OF-0077 8/1/2023 DGM-2766 Unknown Unknown N/A N/A ------Could not locate.
CB-2948 8/1/2023 DGM-8709 Yes No N/A N/A ------
DMH-2066 10/3/2023 DGM-2924 N/A N/A N/A N/A ------DMH-2066 10/3/2023 DGM-7483 Yes No N/A N/A ------
DMH-0843 10/3/2023 DGM-2817 No Yes Colorless Medium 0.5-1.75 ft/sec 0.1 0.5 0.3DMH-0781 10/3/2023 DGM-2570 No Yes Colorless Medium 0.5-1.75 ft/sec <0.05 0.75 <0.02
CB-3162 10/3/2023 DGM-2941 No No N/A N/A ------CB-3160 10/3/2023 DGM-2943 No No N/A N/A ------
DMH-0871 9/5/2023 DGM-8711 No No N/A N/A ------DMH-0871 9/5/2023 DGM-2939 Yes No N/A N/A ------
DMH-0787 9/5/2023 DGM-2583 No No N/A N/A ------
DMH-0871 9/5/2023 DGM-2945 Yes No N/A N/A ------
This pipe was inspected twice. On 8/29/2023 it was
flowing and flow met the likely sewer indicator
threshold. On 9/5/2023 the manhole was revisited
and this pipe was observed with standing water. CB-3144 9/5/2023 DGM-2973 No No N/A N/A ------DMH-0784 9/5/2023 DGM-8140 No No N/A N/A ------
DMH-0784 9/5/2023 DGM-2600 No No N/A N/A ------CB-3171 9/5/2023 DGM-2932 No No N/A N/A ------
DMH-0784 9/5/2023 DGM-2598 No No N/A N/A ------DMH-0787 8/29/2023 DGM-2588 No Yes Colorless Slow 0-0.5 ft/sec 0.3 <0.125 0.2
CB-3187 8/29/2023 DGM-7267 No Yes Colorless Slow 0-0.5 ft/sec <0.05 <0.125 <0.02CB-3149 8/29/2023 DGM-2968 No Yes Colorless Slow 0-0.5 ft/sec <0.05 <0.125 0.21
DMH-0871 8/29/2023 DGM-2945 No Yes Colorless Slow 0-0.5 ft/sec 10 0.5 0.53
This pipe was inspected twice. On 8/29/2023 it was
flowing and flow met the likely sewer indicator
threshold. On 9/5/2023 the manhole was revisited
and this pipe was observed with standing water. CB-3138 8/29/2023 DGM-2980 No Yes Colorless Medium 0.5-1.75 ft/sec <0.05 <0.125 0.1
CB-3149 8/29/2023 DGM-2966 No Yes Colorless Medium 0.5-1.75 ft/sec 0.2 <0.125 0.15
CB-3144 8/29/2023 DGM-2972 No Yes Colorless Fast 1.75 ft/sec or Greater 0.3 0.25 0.11
OF-0078 9/5/2023 DGM-2820 No Yes Colorless Medium 0.5-1.75 ft/sec 0.1 <0.125 0.26
CB-3138 8/29/2023 DGM-2959 No Yes Colorless Medium 0.5-1.75 ft/sec <0.05 <0.125 0.35
OF-0080 9/5/2023 DGM-2828 No Yes Colorless Medium 0.5-1.75 ft/sec 0.3 <0.125 0.32
DMH-0992 8/3/2023 DGM-8673 No Yes Colorless Slow 0-0.5 ft/sec <0.05 <0.125 0.1
OF-0114 8/3/2023 DGM-3417 No Yes Yellow Slow 0-0.5 ft/sec <0.05 <0.125 <0.02
CB-3729 8/1/2023 DGM-3428 No Yes Colorless Unknown <0.05 <0.125 <0.02
OF-0114 8/1/2023 DGM-7342 Unknown Unknown N/A N/A ------Could not locate.
DMH-0992 8/1/2023 DGM-3406 No No N/A N/A ------
CB-3715 8/1/2023 DGM-8136 Yes No N/A N/A ------
CB-3712 8/1/2023 DGM-3408 No No N/A N/A ------
OF-0078
OF-0077
OF-0080
OF-0114
Lexington, MA (0227871.17)
Attach B - CI Results Page 2 of 4
Woodard Curran, Inc.
June 2024
Attachment B: Catchment Investigation Screening Results
MS4 General Permit Illicit Discharge Detection and Elimination Program
Permit Years 6 Catchment Investigation Summaries
Lexington, MA
Infrastructure ID Inspection Date Pipe ID Standing Water Flow Flow Color Velocity Ammonia (ppm)Surfactants (ppm)Chlorine (ppm)Comments
DMH-1324 7/25/2023 DGM-8724 No Yes Colorless Fast 1.75 ft/sec or Greater 0.2 0.25 2
DMH-1324 7/25/2023 DGM-4687 Yes No N/A N/A ------DMH-1316 7/24/2023 DGM-4685 No No N/A N/A ------Outfall was inaccessible.
DMH-1316 7/24/2023 DGM-4734 No No N/A N/A ------CB-5051 7/24/2023 DGM-4465 No Yes Colorless Fast 1.75 ft/sec or Greater 0.3 0.25 1.5
CB-5051 7/24/2023 DGM-4461 No No N/A N/A ------CB-5756 7/24/2023 DGM-5285 No Yes Colorless Medium 0.5-1.75 ft/sec <0.05 <0.125 0.04
CB-5756 7/24/2023 DGM-5313 No No N/A N/A ------DMH-1323 7/24/2023 DGM-7499 No No N/A N/A ------
DMH-1323 7/24/2023 DGM-6915 No No N/A N/A ------DMH-1315 7/24/2023 DGM-4670 No No N/A N/A ------
DMH-1315 7/24/2023 DGM-4672 No No N/A N/A ------OF-0188 7/25/2023 DGM-0188 No Yes Colorless Medium 0.5-1.75 ft/sec 0.1 0.25 0.26
DMH-1323 7/24/2023 DGM-8518 No No N/A N/A ------
DMH-0627 10/3/2023 DGM-2076 No No N/A N/A ------DMH-0627 10/3/2023 DGM-2041 No No N/A N/A ------
DMH-0629 10/3/2023 DGM-2078 No No N/A N/A ------OF-0287 8/21/2023 DGM-2079 Unknown Unknown N/A N/A ------Outfall was inaccessible.
OF-0327 8/1/2023 DGM-2727 No Yes Colorless Unknown <0.05 <0.125 <0.02
CB-5674 7/18/2023 DGM-5193 No No N/A N/A ------
OF-0362 7/18/2023 DGM-5195 Yes No N/A N/A ------DMH-1452 7/18/2023 DGM-5192 Yes No N/A N/A ------
DMH-1452 7/18/2023 DGM-5194 Yes No N/A N/A ------
CB-5672 7/24/2023 DGM-5189 No Yes Colorless Slow 0-0.5 ft/sec 0.1 <0.125 <0.02CB-5673 7/18/2023 DGM-5190 No Yes Colorless Slow 0-0.5 ft/sec 0.1 0.25 <0.02
OF-0363 7/18/2023 DGM-5191 Yes No N/A N/A ------
OF-0382 10/3/2023 DGM-6453 No No N/A N/A ------DMH-0639 9/5/2023 DGM-2051 No No N/A N/A ------
DMH-1749 9/5/2023 DGM-6461 No No N/A N/A ------
OF-0394 8/21/2023 DGM-6460 Yes No N/A N/A ------
OF-0399 8/1/2023 DGM-6484 No No N/A N/A ------
DMH-1760 7/31/2023 DGM-6515 No Yes Colorless Slow 0-0.5 ft/sec <0.05 <0.125 <0.02DMH-1760 7/31/2023 DGM-6513 No Yes Colorless Medium 0.5-1.75 ft/sec <0.05 0.5 <0.02
OF-0400 7/31/2023 DGM-6514 No Yes Colorless Medium 0.5-1.75 ft/sec <0.05 0.5 0.04
DMH-1764 7/31/2023 DGM-6501 No No N/A N/A ------
DMH-1763 7/31/2023 DGM-6504 Yes No N/A N/A ------
DMH-1763 7/31/2023 DGM-6506 No No N/A N/A ------
OF-0401 7/31/2023 DGM-6507 Unknown Unknown N/A N/A ------Could not locate.
OF-0363
OF-0394
OF-0382
OF-0399
OF-0400
OF-0188
OF-0287
OF-0327
OF-0362
OF-0401
Lexington, MA (0227871.17)
Attach B - CI Results Page 3 of 4
Woodard Curran, Inc.
June 2024
Attachment B: Catchment Investigation Screening Results
MS4 General Permit Illicit Discharge Detection and Elimination Program
Permit Years 6 Catchment Investigation Summaries
Lexington, MA
Infrastructure ID Inspection Date Pipe ID Standing Water Flow Flow Color Velocity Ammonia (ppm)Surfactants (ppm)Chlorine (ppm)Comments
DMH-1769 8/1/2023 DGM-6490 No No N/A N/A ------
DMH-1769 8/1/2023 DGM-6492 No No N/A N/A ------OF-0402 7/31/2023 DGM-6491 Unknown Unknown N/A N/A ------Could not locate.
DMH-1773 7/31/2023 DGM-8200 No No N/A N/A ------
DMH-1773 7/31/2023 DGM-6522 No No N/A N/A ------OF-0403 7/31/2023 DGM-6525 Yes No N/A N/A ------
OF-0435 7/24/2023 DGM-8710 No No N/A N/A ------
OF-0437 7/24/2023 DGM-5246 No Yes Yellow Medium 0.5-1.75 ft/sec 0.1 <0.125 <0.02
DMH-1456 7/24/2023 DGM-5231 No Yes Colorless Slow 0-0.5 ft/sec 0.2 <0.125 0.11DMH-1456 7/24/2023 DGM-5229 No Yes Colorless Medium 0.5-1.75 ft/sec <0.05 <0.125 0.86
DMH-1456 7/24/2023 DGM-5228 No Yes Yellow Medium 0.5-1.75 ft/sec <0.05 <0.125 1.97DMH-1461 7/24/2023 DGM-5240 No No N/A N/A ------
DMH-1461 7/24/2023 DGM-5233 No Yes Yellow Medium 0.5-1.75 ft/sec 0.2 <0.125 0.14Notes:
1. Bolded concentrations are above MS4 General Permit individual threshold criteria for potential illicit discharges.
2. Shaded cells indicate locations where all MS4 General Permit threshold criteria for potential illicit discharges were exceeded or where visual evidence of an illicit discharge was observed.
3. ND = Not Detected.
4. -- = Not Tested.
OF-0403
OF-0437
OF-0402
OF-0435
Lexington, MA (0227871.17)
Attach B - CI Results Page 4 of 4
Woodard Curran, Inc.
June 2024
Lexington, MA (0227871.17) Woodard & Curran, Inc.
Lexington, MA MS4 PY6 Catchment Investigation Memo July 2024
ATTACHMENT C: SURFICIAL DRAINAGE INFRASTRUCTURE
CONDITIONS
Attachment C: Surficial Drainage Infrastructure Conditions
MS4 General Permit Illicit Discharge Detection and Elimination Program
Permit Years 6 Catchment Investigation Summaries
Lexington, MA
Infrastructure ID Location Inspection Date Infrastructure
Grade
Pavement
Condition
Cover
Condition
Frame
Condition
Corbel
Condition
Floor
Condition
Corbel Construction
Material
Walls Construction
Material Comments
DMH-0128
DMH-0018 Waltham St 10/3/2023 At Grade Does Not Exist Good Good Good Not Visible Precast Concrete Concrete Block --DMH-1045
CB-4049 Fletcher Ave 10/3/2023 At Grade Good Good Good Good Not Visible Concrete Block Concrete Block --OF-0032
OF-0032 Byron Ave 8/1/2023 N/A N/A N/A N/A N/A N/A N/A N/A Standing water/submerged.
DMH-0515 Byron Ave 9/5/2023 At Grade Good Good Good Good Not Visible Brick Concrete Block Bricks and sediment in pipes/channel.OF-0034
OF-0034 Marrett Rd 9/5/2023 N/A N/A N/A N/A N/A N/A N/A N/A Unable to access outfall, heavily vegetated.
CB-1667 Marrett Rd 8/21/2023 At Grade Good Good Good Good Not Visible Concrete Block Concrete Block --OF-0036
OF-0036 Churchill Ln 8/1/2023 N/A N/A N/A N/A N/A N/A N/A N/A Erosion present from rain.
OF-0046CB-1967 Carville Ave 9/5/2023 At Grade Good Good Good Good Not Visible Brick Concrete Block --
CB-1975 Ames Ave 9/5/2023 At Grade Good Good Good Good Good Concrete Block Brick --
CB-1973 Ames Ave 8/1/2023 At Grade Good Good Good Good Not Visible Brick Concrete Block Unmapped SW inlet, SDE mapped inlet in the field. OF-0046 Carville Ave 8/21/2023 N/A N/A N/A N/A N/A N/A N/A N/A --
CB-1969 Carville Ave 8/21/2023 At Grade Good Good Good Good Not Visible Brick Concrete Block Unmapped SE inlet, SDE mapped inlet in the field. OF-0054
CB-8074 Circle Rd 7/18/2023 At Grade Good Good Good Good Not Visible Precast Concrete Precast Concrete --
OF-0056OF-0056 Ablemarle Ave 7/25/2023 N/A N/A N/A N/A N/A N/A N/A N/A Fishy odor.
OF-0057
CB-2157 Lowell St 8/21/2023 At Grade Good Good Good Good Good Concrete Block Concrete Block Mapped as a catch basin but is actually a manhole.CB-2151 Lowell St 7/31/2023 At Grade Good Good Good Good Good Brick Concrete Block --
OF-0057 Lowell St 10/3/2023 N/A N/A N/A N/A N/A N/A N/A N/A --
CB-2154 Summer St 7/31/2023 At Grade Good Good Good Good Not Visible Brick Concrete Block --OF-0059
CB-2162 Bartlett Ave 7/31/2023 At Grade Good Good Good Good Not Visible Precast Concrete Precast Concrete --OF-0059 Bartlett Ave 8/21/2023 N/A N/A N/A N/A N/A N/A N/A N/A Standing water/ submerged.
CB-2167 Bartlett Ave 7/24/2023 At Grade Good Good Good Good Not Visible Precast Concrete Precast Concrete --
OF-0078DMH-2066 Lowell St 10/3/2023 At Grade Good Good Good Good Good Precast Concrete Precast Concrete --
DMH-0843 Lowell St 10/3/2023 At Grade Does Not Exist Good Good Good Not Visible Brick Brick --
CB-3162 Fairlawn Ln 10/3/2023 At Grade Good Good Good Good Not Visible Concrete Block Concrete Block --CB-3160 Fairlawn Ln 10/3/2023 At Grade Good Good Good Good Not Visible Concrete Block Concrete Block --
DMH-0781 Whipple Rd 10/3/2023 At Grade Good Good Good Good Not Visible Brick Concrete Block --
CB-3171 Fiske Rd 9/5/2023 At Grade Good Good Good Good Not Visible Brick Concrete Block --DMH-0871 Fiske Rd 9/5/2023 At Grade Good Good Good Good Not Visible Concrete Block Brick Unmapped NW inlet. SDE mapped inlet in the field. Inlet sandbagged.
DMH-0784 Locke Ln 9/5/2023 At Grade Good Good Good Good N/A Brick Concrete Block Mapped as a manhole but is actually a catch basin.
CB-3187 Wheeler Rd 8/29/2023 At Grade Good Good Good Good N/A Brick Concrete Block --DMH-0787 Whipple Rd 8/29/2023 At Grade Good Good Good Good Good Concrete Block Concrete Block --
CB-3138 Wheeler Rd 8/29/2023 At Grade Good Good Good Not Visible Good Unknown Concrete Block Unable to see floor material due to sediment build up.DMH-0842 Bartlett Ave 8/29/2023 N/A N/A N/A N/A N/A N/A N/A N/A Could not locate.
CB-3144 Locke Ln 8/29/2023 At Grade Good Good Good Good Not Visible Brick Concrete Block Need to return to bag NE inlet and dry inlet.
CB-3149 Fiske Rd 8/29/2023 At Grade Good Good Good Good Good Concrete Block Concrete Block Need to return to sandbag NW inlet.DMH-2013 Fairlawn Ln 8/29/2023 N/A N/A N/A N/A N/A N/A N/A N/A Could not locate.
OF-0078 Bartlett Ave 9/5/2023 N/A N/A N/A N/A N/A N/A N/A N/A --
DMH-0865 Lowell St 8/29/2023 N/A N/A N/A N/A N/A N/A N/A N/A Could not locate.OF-0080
OF-0080 Emerson Gardens Rd 9/5/2023 N/A N/A N/A N/A N/A N/A N/A N/A --
OF-0114CB-3715 Fulton Ave 8/1/2023 At Grade Good Good Good Good Good Brick Concrete Block --
CB-3729 Fulton Ave 8/1/2023 At Grade Good Good Good Good Not Visible Concrete Block Concrete Block --
OF-0114 Lowell St 8/1/2023 N/A N/A N/A N/A N/A N/A N/A N/A --
DMH-0992 Laconia St 8/1/2023 At Grade Good Good Good Good Good Brick Concrete Block --
CB-3712 Lowell St 8/1/2023 At Grade Good Good Good Good Good Concrete Block Concrete Block Mapped as catch basins but is actually a manhole. Inlet from CB-3710 does not appear to connect to CB-3712.
OF-0188CB-5223 Freemont St 7/25/2023 At Grade Good Good Good Good Not Visible Concrete Block Concrete Block Significant infiltration. Suspect infiltration is coming from a water main SW of catch basin.
DMH-1324 Freemont St 7/25/2023 At Grade Good Good Good Good Not Visible Brick Concrete Block Unmapped NW inlet. SDE mapped inlet in the field.
DMH-1315 Asbury St 7/24/2023 At Grade Good Good Good Good Good Brick Concrete Block --DMH-1316 Freemont St 7/24/2023 At Grade Good Good Good Good Good Brick Concrete Block --
CB-5051 Constitution Rd 7/24/2023 At Grade Good Fair Good Good Good Brick Brick --
CB-5756 Oxbow St 7/24/2023 At Grade Good Good Good Good Good Brick Concrete Block --OF-0188 Constitution Rd 7/25/2023 N/A N/A N/A N/A N/A N/A N/A N/A --
DMH-1323 Bellflower St 7/24/2023 At Grade Good Good Good Good Good Brick Concrete Block Unmapped SE Inlet. SDE mapped inlet in the field. Sandbagged on 7/24.
OF-0287DMH-0629 Fottler Ave 10/3/2023 At Grade Good Good Good Good Good Brick Concrete Block --
DMH-0627 Fottler Ave 10/3/2023 At Grade Good Good Good Good Good Brick Concrete Block --
OF-0287 Fottler Ave 8/21/2023 N/A N/A N/A N/A N/A N/A N/A N/A Outfall is inaccessible. Outfall discharges into culvert.OF-0327
OF-0327 Barrett Rd 8/1/2023 N/A N/A N/A N/A N/A N/A N/A N/A --OF-0362
CB-5675 Woodpark Cir 7/18/2023 At Grade Good Good Good Good Good Brick Brick Standing water.
DMH-1452 Woodpark Cir 7/18/2023 At Grade Does Not Exist Good Good Good Good Brick Concrete Block Appears to be a culvert. Flow at beginning of culvert, standing water at outfall.
Lexington, MA (0227871.17)
Attach C - Structures Page 1 of 2
Woodard Curran, Inc.
June 2024
Attachment C: Surficial Drainage Infrastructure Conditions
MS4 General Permit Illicit Discharge Detection and Elimination Program
Permit Years 6 Catchment Investigation Summaries
Lexington, MA
Infrastructure ID Location Inspection Date Infrastructure
Grade
Pavement
Condition
Cover
Condition
Frame
Condition
Corbel
Condition
Floor
Condition
Corbel Construction
Material
Walls Construction
Material Comments
CB-7186 Woodpark Cir 7/18/2023 At Grade N/A N/A N/A N/A Good Unknown Precast Concrete This structure is an inlet from a stream. Sample results: pH: 6.75 temp: 25.7 conductivity: 209 salinity: 0.1 A: 0.3
C:0 S:0.OF-0362 Woodpark Cir 7/18/2023 N/A N/A N/A N/A N/A N/A N/A N/A Standing Water/Submerged.
CB-5674 Woodpark Cir 7/18/2023 At Grade Good Good Not Visible Not Visible N/A N/A N/A Standing Water/Submerged.OF-0363
CB-5672 Woodpark Cir 7/24/2023 At Grade Good Good Good Good Not Visible Brick Concrete Block --
OF-0363 Woodpark Circ 7/18/2023 N/A N/A N/A N/A N/A N/A N/A N/A Standing Water/Submerged.CB-5673 Woodpark Cir 7/18/2023 At Grade Good Good Good Good Not Visible Brick Concrete Block --
OF-0382DMH-0639 Drew Ave 8/21/2023 At Grade Good Good Good Good Good Brick Concrete Block --
OF-0382 Bow St 8/21/2023 N/A N/A N/A N/A N/A N/A N/A N/A --
OF-0394DMH-1749 S Rindge Ave 8/21/2023 At Grade Good Good Good Good Good Precast Concrete Precast Concrete --
OF-0394 S Rindge Ave 8/21/2023 N/A N/A N/A N/A N/A N/A N/A N/A Standing Water/Submerged.
OF-0399OF-0399 Bartlett Ave 7/31/2023 N/A N/A N/A N/A N/A N/A N/A N/A --
OF-0400
DMH-1760 Butterfield Rd 7/31/2023 At Grade Good Good Good Good Not Visible Precast Concrete Precast Concrete --OF-0400 Butterfield Rd 7/31/2023 N/A N/A N/A N/A N/A N/A N/A N/A --
OF-0401
DMH-1764 Solomon Pierce Rd 7/31/2023 At Grade Good Good Good Good Not Visible Precast Concrete Precast Concrete --OF-0401 Solomon Pierce Rd 7/31/2023 N/A N/A N/A N/A N/A N/A N/A N/A Could not locate.
DMH-1763 Solomon Pierce Rd 7/31/2023 At Grade Good Good Good Good Not Visible Precast Concrete Precast ConcreteOF-0402
DMH-1769 Solomon Pierce Rd 7/31/2023 At Grade Good Good Good Good Not Visible Precast Concrete Precast Concrete --
OF-0402 Solomon Pierce Rd 7/31/2023 N/A N/A N/A N/A N/A N/A N/A N/A Could not locate.OF-0403
DMH-1773 Joseph Comee Rd 7/31/2023 At Grade Good Good Good Good Not Visible Precast Concrete Precast Concrete
OF-0403 Joseph Comee Rd 7/31/2023 N/A N/A N/A N/A N/A N/A N/A N/A Standing Water/Submerged.
OF-0435
OF-0435 Wood St 7/24/2023 N/A N/A N/A N/A N/A N/A N/A N/A --
OF-0437DMH-1461 Woodpark Cir 7/24/2023 At Grade Good Good Good Good Good Concrete Block Precast Concrete --
DMH-1456 Woodpark Cir 7/24/2023 At Grade Good Good Good Good Good Brick Precast Concrete --OF-0437 Woodpark Cir 7/24/2023 N/A N/A N/A N/A N/A N/A N/A N/A --
Lexington, MA (0227871.17)
Attach C - Structures Page 2 of 2
Woodard Curran, Inc.
June 2024