HomeMy Public PortalAboutP001174328_3/8/2024 3:03:46 PMPOST -CONSTRUCTION STORMWATER
BMP 2023 ANNUAL MAINTENANCE REPORT FORM
The Post -Construction Stormwater Best Management
Practice (BMP) Annual Maintenance Report is required for
demonstrating compliance with the Maintenance
Agreement and Stormwater Management Facilities Report
for your property development. MSD provides this online
report form to Stormwater BMP owners as a consistent and
convenient option to meet their annual reporting
obligations. To comply with the annual report requirement,
please submit one report form for each MSD
Project/Record Number at your site. Please answer all
questions for each stormwater BMP facility at your property
development. Instructions for completing certain fields will
display by hovering over the ? symbol with the pointer.
Enter the Project/Record Number for Your Report
Project/Record Number*(9)
P001174328
Owner Information (')
Property Owner Name*
Monsanto Company
Name of Owner's Designated Contact for this Property Development*P)
Anna Tang
Name of Person Preparing this Report*
Clare Trim
Email of Person Preparing this Report*
Clare.Trim@bayer.com
Update Owner Information
Owner's Address*(9)
800 N. Lindbergh Blvd., Mail Zone R3B
Owner's City*
St. Louis
Owner's State*
MO
Owner's Zip Code*
63017
Owner's Phone Number* (2)
314-694-1340
Email of Owner or the Owner's Designated Contact* (2)
Anna.Tang@bayer.com
Confirm Email of Owner or the Owner's Designated Contact*
Anna.Tang@bayer.com
Stormwater BMP Condition and Maintenance Questions (9)
BMP Asset Number*
GIS-BMP-8141
BMP Asset Type
Natural Area Conservation
When was the last inspection performed?*
12/7/2023
Describe the condition of the contributing drainage area. *
Good condition. Contributing drainage is free of erosion, sediment or gravel, trash, debris and other potential
pollutants.
Moderate condition. Contributing drainage has some areas with erosion, sediment or gravel, trash, debris and other
potential pollutants.
Degraded condition. Contributing drainage contains areas degraded by erosion, sediment or gravel, trash, debris and
other potential pollutants.
Serious condition. Contributing drainage contains significant and problematic areas of erosion, sediment or gravel,
trash, debris or other potential pollutants exposed to stormwater.
Not Applicable
Describe the condition of the inlet(s), or area conveying sheet flow if piped inlets do not exist.*
Good condition. Inlet(s) effectively conveys water into the facility and there is no evidence of erosion, sediment
accumulation, trash and other debris or pollutants.
Moderate condition. Inlet(s) conveys water into the facility, but there is some erosion, sediment accumulation, trash
and other debris or pollutants.
Degraded condition. Inlet(s) conveys water into the facility, but there are areas degraded by erosion, sediment
accumulation, trash and other debris or pollutants.
Serious condition. Inlet(s) may or may not convey water into the facility, and there are significant and problematic
areas of erosion, sediment accumulation, trash and other debris or pollutants.
Not Applicable
Describe the condition of the pretreatment area(s) or forebay(s). *
Good condition. There is no evidence of sediment/trash/debris, erosion, standing water or clogging, dead vegetation
or bare soil. Adequate condition of structural components.
Moderate condition. There is some sediment/trash/debris, erosion, standing water or clogging, dead vegetation or
bare soil. Adequate condition of structural components.
Degraded condition. There are areas degraded by sediment/trash/debris, erosion, standing water or clogging, dead
vegetation or bare soil. Condition of structural components may be inadequate.
Serious condition. There are significant and problematic areas of sediment/trash/debris, erosion, standing water or
clogging, dead vegetation or bare soil. Condition of structural components may be inadequate.
Not Applicable
Describe the condition of the treatment area, and its vegetation if applicable.*
Good condition. There is no evidence of sediment/trash/debris, erosion, missing mulch or pea gravel, oil/chemical
accumulation, standing water or clogging, dead vegetation or bare soil. There is adequate plant covering, vegetation is
not overgrown, there is no evidence of invasive, overgrown weeds, or woody vegetation. Adequate condition of
structural components.
Moderate condition. There is some sediment/trash/debris, erosion, missing mulch or pea gravel, oil/chemical
accumulation, standing water or clogging, dead vegetation or bare soil. There is some inadequate plant covering,
overgrown vegetation, and invasive, overgrown weeds, or woody vegetation. Adequate condition of structural
components.
Degraded condition. There are degraded areas of sediment/trash/debris, erosion, missing mulch or pea gravel,
oil/chemical accumulation, standing water or clogging, dead vegetation or bare soil. There are degraded areas of
inadequate plant covering, overgrown vegetation, and invasive, overgrown weeds, or woody vegetation. Condition of
structural components may be inadequate.
Serious condition. There are significant and problematic areas of sediment/trash/debris, erosion, missing mulch or
pea gravel, oil/chemical accumulation, standing water or clogging, dead vegetation or bare soil. There are significant and
problematic areas of inadequate plant covering, overgrown vegetation, or invasive, overgrown weeds, or woody
vegetation. Condition of structural components may be inadequate.
Not Applicable
Describe the condition of the overflowloutlet structure. *
Good condition. Overflow/outlet effectively conveys water out of the facility and there is no evidence of erosion,
sediment/trash/debris or other pollutants. Adequate condition of structural components.
Moderate condition. Overflow/outlet conveys water out of the facility and there is some evidence of erosion,
sediment/trash/debris or other pollutants. Adequate condition of structural components.
Degraded condition. Overflow/outlet conveys water out of the facility, but there are degraded areas of erosion,
sediment accumulation, trash and other debris or pollutants. Condition of structural components may be inadequate.
Serious condition. Overflow/outlet may or may not convey water out of the facility, and there are significant and
problematic areas of erosion, sediment accumulation, trash and other debris or pollutants. Condition of structural
components may be inadequate.
Not Applicable
Complaints from local residents?*
Yes No
Any public hazards?*
Yes No
Describe any maintenance activities performed throughout the reporting year. (Check all that apply)*
Installed new plants
Weed removal
Added mulch or pea
gravel
Not Applicable
Replaced filter media
Erosion control
Vacuuming
Upload at least one picture of this facility from the
most recent inspection.*
CV 2023-12 267323 Electrical
632.89KB
Upgrade Insp Rpt.pdf
Reseeded
Trash or debris removal
Repaired/replaced
structural components
Sediment removal
Sweeping/Raking
Full restoration or
replacement of facility
No photo available to upload
No photo available to upload
Describe newly constructed improvements, unique site conditions or maintenance activities related to the
management of the stormwater BMP(s) at your property development. (?)
Woody debris & sediment removed, invasive weeds removed
100 character limit
I would like to receive email messages about future Stormwater BMP Training Workshops and other educational
opportunities hosted by MSD or its partners.
Yes
This form was generated using the best readily available information. In the case certain stormwater BMP assets
were not included on this report form, the property owner is still responsible for maintaining and operating all
stormwater management facilities in conformity with the approved stormwater management facilities report for
the property development pertaining to this report form.
By checking the box below you agree that the contents of this form are true and accurate to the best of your
knowledge. *
I agree
Post-Construction Stormwater BMP Inspection and Maintenance Record
267323
MSD P Number:P001174328
Project:Bayer - Site Electrical Upgrades
Address:700 Chesterfield Parkway West 63017
Customer:Bayer
Contact:Anna Tang
Phone Number:314-694-3169
Email:anna.tang@bayer.com Inspector(s):Marianne Pott
Company:Stormwater STL LLC
Address:6514 Lansdowne Avenue 63109
Constr. Approval:January 20, 2015 Phone:(314) 229-8334
Record Start Date:December 19, 2016 E-mail:marianne@stormwater-stl.net
Stormwater Treatment Facilities:Total Count:
Count Type Description Count Type Description
BIOR BIORETENTION/RAINGARDEN (A)P-1 MICROPOOL EXTENDED DETENTION POND (A)
BIOS BIORETENTION/RAINGARDEN (SMALL) (A)P-2 WET POND (A)
GRWD GRAVEL WETLAND (A)P-3 WET EXTENDED DETENTION POND (A)
CIST CISTERN/DRYWELL (U)P-5 POCKET POND (A)
O-1 DRY SWALE - LARGE (A)W-2 ED SHALLOW WETLAND (A)
O-2 DRY SWALE - SMALL (A)W-3 POND/WETLAND SYSTEM (A)
O-3 WET SWALE - LARGE (A)SCDN STORM CREDIT - DISCONNECT NONROOFTOP (A)
O-4 WET SWALE - SMALL (A)SCDR STORM CREDIT - DISCONNECT ROOFTOP (A)
HDSP PROPRIETARY HYDRODYNAMIC SEPARATOR SCES STORM CREDIT - ENVIRONMENTALLY SENSTV(A)
I-1 INFILTRATION TRENCH (A)1 SCNA STORM CREDIT - NATURAL AREA CONSERVA (A)
I-2 INFILTRATION BASIN (A)SCOC STORM CREDIT - OPEN CHANNEL USE (A)
AMDS AMENDED SOILS (A)SCSB STORM CREDIT - SHEET FLOW TO BUFFER (A)
GRRF GREEN ROOF (A)F-1 SURFACE SAND FILTER (A)
O-5 FILTER STRIPS - LARGE (A)F-3 PERIMETER SAND FILTER (A)
O-6 FILTER STRIPS - SMALL (A)F-4 ORGANIC FILTER (A)
PPAS PERMEABLE PAVEMENT - ASPHALT (A)F-5 POCKET SAND FILTER (A)
PPBK PERMEABLE PAVEMENT - PAVER BLOCK (A)F-PR PROPRIETARY BMP FILTER (U)
PPCO PERMEABLE PAVEMENT - CONCRETE (A)F-2 UNDERGROUND SAND FILTER (U)
PPGR PERMEABLE PAVEMENT - GRAVEL (A)
DET DETENTION WQS UNDERGROUND WATER QUALITY STORAGE
DET U UNDERGROUND FBAY PRETREATMENT FOREBAY
Inspection, Maintenance and Annual Report Submission Record:
Date Activity Date Activity
2016.12.19 Initial Inspection
2017.03.02 Inspection
2017.06.19 Inspection
2017.09.13 Inspection
2017.12.12 Inspection
2018.03.06 Inspection
2018.06.22 Inspection
2018.09.11 Inspection
2018.12.11 Inspection
2019.03.12 Inspection
2019.06.13 Inspection
2019.09.18 Inspection
2019.12.11 Inspection
2020.03.06 Inspection
2020.06.24 Inspection
2020.09.16 Inspection
2020.12.09 Inspection
2021.03.16 Inspection
2021.06.09 Inspection
2021.09.09 Inspection
2021.12.07 Inspection
2022.03.02 Inspection
2022.06.15 Inspection
2022.09.21 Inspection
2022.12.09 Inspection
2023.03.08 Inspection
2023.06.08 Inspection
2023.09.21 Inspection
2023.12.07 Inspection
1
Bayer Equip #
Post-Construction Stormwater BMP Inspection Report
Bayer Equip #267323
MSD P Number:P001174328
Project:Bayer - Site Electrical Upgrades
Address:700 Chesterfield Parkway West 63017
Inspection Date:December 7, 2023
Time:7:00 AM
Weather:42°F; Sunny
Last rain event:0.01" on December 5, 2023
Last one inch rainfall:1.62" on September 27, 2023
Bayer Inspector(s):Marianne Pott
Anna Tang Company:Stormwater STL LLC
314-694-3169 Address:6514 Lansdowne Avenue 63109
anna.tang@bayer.com Phone:(314) 229-8334
E-mail:marianne@stormwater-stl.net
Last Inspection Date:September 21, 2023
Native Area Conservation / Upland Vegetated Buffer
Native Area Conservation / Upland Vegetated Buffer
System Discharge
Action Items Identified During This Inspection:
No new action items were identified during this inspection.
Page 1
Customer:
Contact:
Phone Number:
Email:
According to MSD records, construction was approved for MSP P001174328 on January 20, 2015 and consists of vegetative reestablishment to a disturbed
area adjacent to an existing wetland. The area was planted with a prairie seed mixture as outlined in the MSD Landscaping Guide. This vegetated buffer is
upstream of the wetland and will aid in the dissipation of water flow at each pipe outlet. As such, it should remain vegetated to protect from erosion.
Inspections showed that all areas were originally vegetated and appeared stable, but flooded as the water in the wetland area backed up to the project area.
Exploration at the end of the property line showed that there are two 36" pipes that make a 90° turn underneath the back access road to the east near West
Drive. Woody debris collected at the pipes and the grading of the existing wetland existing wetland area were impeding the project area from draining.
Between June 2020 and September 2020, this area was cleared out to restore functioning at the drainage outlet, and native vegetation in the project area
has since recovered. The outlet will need to be cleaned periodically to remove woody debris.
After carefully reviewing all components of the system and finding only routine maintenance needs (see below), I am pleased to report:
Based on what was observed, this stormwater treatment system appears to be functioning in accordance with the design intent.
CONTROL for invasive weeds (Bayer) --- COMPLETED / ONGOING
CUT AND REMOVE dead plant material and leaves (Bayer) --- NOT COMPLETED
Inspector's Summary:
Status of Open Action Items Identified During Previous Inspections:
REMOVE woody debris & sediment blocking system discharge (Bayer) --- COMPLETED
This document has been prepared exclusively for the Customer noted above (Customer) by Stormwater STL LLC (Stormwater STL), based on a visual inspection conducted on the date(s) noted
above. Unless specifically indicated, Stormwater STL did not undertake any forensic investigation at this location on the date(s) noted. The opinions expressed in this document relate only to the
condition of the site and the Post-Construction Stormwater BMP(s) as observed by Stormwater STL on the date(s) noted. The content of this document reflects the opinion of Stormwater STL
only and Stormwater STL makes no express or implied representation or warranty with respect to the conditions described or the functionality of the systems identified in this report. Other than
Customer, third parties who rely upon this document do so solely at their own risk and Stormwater STL disclaims all liability, damages or loss with respect to such reliance. Neither Customer nor
Stormwater STL, nor any person acting for and/or on behalf of those companies, assumes any responsibility, duty of care or liability to any person to update the contents of this document or to
distribute any subsequently learned information to recipients of this document other than to Customer. This disclaimer must accompany every copy of this document, which is an integral
document and must be read in its entirety.
Post-Construction Stormwater BMP Inspection Report
Field Observations:
Natural Area Conservation (GIS-BMP-8141)
Attribute Assessment Comments
Green
Green
Green
Green
Survival of restoration plantings - wetland seed mix Yellow
Yellow
Private Inlets/Manholes/Piping
Assessment Comments
Green
Green
Green
Green
Assessment Comments
Green
Green
Green
Green
Green
Photographs
See attached sheet(s)
Inspector's Notes
Bayer Site Electrical Upgrades - December 7, 2023 Page 2
Attribute
Dead plant material & leaves on surface in absense of 2022 - 2023 winter cutdown
Erosion
Exposed soil
CUT AND REMOVE dead plant material and leaves, photo 2 (Bayer)
Bare soil has filled in with native plants, photos 5 - 7
Access
Trash/debris/leaves
No erosion noted below inlets or on embankments, photos 3 & 4
None
Mosquitoes
Encroachment(s) on facility or easement
Public Hazard(s)
Attribute
Complaints Not aware of any complaints
Miscellaneous
System discharge Two 36" outlet pipes remain clear of sediment and woody debris, photo 9
IMPORTANT NOTE ABOUT PLANT MATERIALS IN STORMWATER QUALITY SYSTEMS
As you know, survival of the MSD-approved plantings is a key component in the functionality of this BMP. The health of these plants aids in embankment
stabilization, stormwater dissipation, and minimizing non-native invasive species. Cutting back the native plants during the winter aids in stronger root
development which promotes vitality during the growing season. The presence of non-native invasive plants should be monitored as their aggressive
growth habits can quickly overtake desirable species. The eradication of any invasive plants should occur during the spring and fall through the selective
use of herbicides or by hand removal.
If you have questions about plant maintenance or would like to develop a stewardship program to protect your stormwater quality assets, please let me
know.
September 21, 2022: Invasive weeds noted during the previous inspection appeared to have been managed. New weeds have been noted, however;
management of unintended growth should continue. Woody debris and sediment continue to collect at the outlet pipes. The outlet pipes should be cleared
of obstructions.
December 9, 2022: Dead plant debris should be cut down and removed along with leaves from the wetland seeded area around the pipe ends. Woody
debris continues to build at the two 36" CMP outlet pipes and needs to be removed.
March 8, 2023: No changes noted.
June 8, 2023: Woody debris and sediment blocking the 36" CMP outlet pipes were thoroughly removed. Vegetation has regrown. Intended native
plantings have really good coverage in the project area. Johnson grass growing on the embankment was thinned out and shows no signs of regrowing yet.
September 21, 2023: No changes noted.
December 7, 2023: The area is functional but the vegetation added as a result of project disturbance could use some routine maintenance. Dead plant
material should be cut down and removed during the winter and invasive growth should be addressed during the growing season.
CONTROL for invasive weeds, photo 8 (Bayer)
Erosion/settlement around structures
Other (describe)
Weeds - fireweed, tick trefoil, ornamental jewelweed,
marestail, ragweed
Structural components In good condition
Trash/debris/leaves
BAYER
Site Electrical Upgrades Stormwater BMP Photos
December 7, 2023
1. VIEW OF WETLAND SEEDED AREA (GIS-
BMP-8141)
2. CUT DOWN AND REMOVE DEAD PLANT
MATERIAL BEFORE NEXT GROWING SEASON 3. VIEW OF SYSTEM INLET ST 1A
4. VIEW OF SYSTEM INLET ST 3A 5. NATIVE PLANTS ARE PRESENT –SEDGE 6. NATIVE PLANTS ARE PRESENT –ROSE
MALLOW
7. NATIVE PLANTS ARE PRESENT –
GOLDENROD
8. CONTROL FOR INVASIVE GROWTH –
FIREWEED 9. SYSTEM DISCHARGE IS CLEAR