Stormwater Atlas

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Inspection, Operations, and Maintenance

Long-term O&M obligations, inspection frequency, and enforcement hooks.

ReviewedPrevalence 50%~290 manuals tagged14 citationsModel: heuristic+editorial
Provisional practice synthesis for discussion — not a design manual or adopted regulation. Controlling state, regional, and MS4 criteria apply when more stringent. Verify citations against the linked jurisdiction manuals.

Practice

Operation and maintenance requirements commonly appear as design deliverables: named responsible parties, inspection frequencies, and access provisions. Green infrastructure manuals emphasize vegetation, sediment removal, and underdrain maintenance. Bond release or occupancy is sometimes tied to as-built acceptance.

O&M design deliverables

Draft national guidance grounded in atlas practice — not a design manual or adopted regulation.

TopicSuggested national guidanceAtlas note
Responsible partyName the long-term owner/operator and inspection frequency in an O&M planCommon design-deliverable requirement
AccessDesign easements, ramps, and cleanouts for inspection and maintenanceEmphasized in GI manuals
AcceptanceTie occupancy or bond release to as-built acceptance where local codes allowVaries by agency

Guidance

Require an O&M plan naming the responsible party, inspection frequency, and performance indicators. Design for access (easements, ramps, cleanouts). Document vegetation, sediment removal, and underdrain maintenance for GI practices. Tie certificates of occupancy or bond release to as-built acceptance where local codes allow.

Open questions

Minimum inspection frequencies by SCM type. Whether national language should address long-term funding mechanisms.

References

Numbered footnotes for guidance clauses and atlas notes. Field-verified entries come from structured atlas evidence; corpus-pattern entries are keyword-matched excerpts.

  1. [1]ConnecticutConnecticutCorpus patternpages 222-222
    “nd sediment using a vacuum truck or other catch basin cleaning equipment.  The Operation and Maintenance (O&M) Plan should indicate the maximum allowable level of oil, sediment, and debris accumulation. These levels should be monitored during inspections to ensure”
  2. [2]State of Hawaii Department of Transportation, Highways DivisionHawaiiCorpus patternpages 83-83
    “in accordance with the construction specifications of the Post-Construction BMP O&M Plan. Inspections shall occur once per year at a minimum. During the first year after construction, post- construction BMPs shall be inspected after an exceeda”
  3. [3]AlaskaAlaskaCorpus patternpages 211-212
    “Chapter 5: Permanent Storm Water Management Controls 5.5 Maintenance Proper BMP operation and maintenance (O&M) is an important aspect in assuring the effectiveness of a BMP in mitigating storm water pollution. Routine maintenance or service also contributes to the”
  4. [4]WashingtonWashingtonCorpus patternpages 148-148
    “review and approval, local jurisdictions should consider a performance bond for operation and maintenance of BMPs at the site. Staff can enforce proper operation and main- tenance requirements during site inspections or in response to complaints about a site or BMP”
  5. [5]GeorgiaGeorgiaCorpus patternpages 145-145
    “ists of regular in- spections during construction as well as periodic (ongoing) operation and maintenance inspections at regular intervals after construction. Ensuring that the post-construction stormwater practice is built correctly (in accordance with the approve”
  6. [6]PennsylvaniaPennsylvaniaCorpus patternpages 111-111
    “K, Construction Inspection, Operation, and Maintenance. Table 3-4: SCM-Specific Operation and Maintenance Procedures STAGE ACTIVITY General • For general guidelines, see Appendix K. Post-Construction Establishment Period • Water weekly unless 0.25 inch of rainfall”
  7. [7]City of BoiseIdahoCorpus patternpages 25-25
    “2019 Boise Stormwater Design Manual2-15 Facility operators responsible for operation and maintenance shall conduct regularly scheduled inspections, clean, and maintain the system when necessary to ensure operation according to the original design. For above gr”
  8. [8]IdahoIdahoCorpus patternpages 86-86
    “em Frequent, thorough, and consistent inspections are the key to the successful operation and maintenance of a storm water system. Inspections reveal the operational status of the system, identify needed maintenance actions, and provide information to update the O&”
  9. [9]City of ChicagoIllinoisCorpus patternpages 51-51
    “Chicago Stormwater Ordinance Manual O & M Requirements 45 5.0 Operation and Maintenance Requirements 5.1 Introduction and Applicability Operations and maintenance (O&M) is essential for proper stormwater management. The BMPs and stormwater managem”
  10. [10]PhiladelphiaPennsylvaniaCorpus patternpages 543-543
    “ater Department (PWD) is required to periodically inspect and ensure the proper operation and maintenance of all stormwater management practices (SMPs) and associated drainage areas installed on private properties. 6.2.1 PWD Post-Construction Inspections PWD period”
  11. [11]City of RaleighNorth CarolinaCorpus patternpages 100-100
    “O&M Manual, a recorded drainage easement for the purposes of SCM access, and an Operation and Maintenance Agreement shall be completed as part of the permitting process to ensure proper long-term maintenance of each SCM. 6.6.1 Operations and Maintenance Manual To p”
  12. [12]MassachusettsMassachusettsCorpus patternpages 55-55
    “pter 2: The Massachusetts Stormwater Management Standards Page 2-41 Standard 9: Operation and Maintenance Plan Definition A long-term operation and maintenance plan shall be developed and implemented to ensure that the stormwater management system functions as desi”
  13. [13]Texas Commission on Environmental QualityTexasCorpus patternpages 332-332
    “lan is provided on the following page. AQUALOGICTM STORMWATER FILTRATION SYSTEM OPERATION AND MAINTENANCE PLAN Maintenance Task Item Description of Maintenance/Repairs to be Performed(1) Typical Frequency(2) Basin and Inlet Visually inspect and note items which nee”

Supporting jurisdictions

13 jurisdictions cited in this section (outline tags ~290 manuals; full atlas has ~299).

ct-statehawaii-dot-pcbmpak-statewa-state-westernga-statepa-stateboise-ididaho-bmp-catalogchicago-ilphiladelphia-paraleigh-ncma-state-drafttx-edwards-rg348