540 Drainage System Maintenance
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1 540 Drainage System Maintenance Visual Visual 540-1
2 541.a Activity description Drainage system: all natural and man-made watercourses, conduits and storage basins Conveyance system: channels that must be maintained to prevent damage to buildings or infrastructure from smaller, more frequent, storms. Generally focus on open channels Generally concerned only with developed areas Must include repetitive loss areas with drainage problems Manual Page Visual Visual 540-2
3 542.a Channel debris removal (CDR) Credit criteria (1) Meet all activity credit criteria (2) Inspections: annually, after a complaint, after storms Take action when a problem is found Manual Page (3) Map of the components of the conveyance system (4) Inventory of the conveyance system components (5) Written procedures (6) Records of inspections and maintenance Visual Visual 540-3
4 Map and Inventory Step 1. Identify the developed area of the community. Include: all developed portions of the community May exclude undeveloped areas Areas with no buildings may be eliminated Areas of 5 acre lots may be eliminated Manual Page Visual Visual 540-4
5 Step 2. Map the conveyance system (a) Include public and private areas (b) Include all channels in developed SFHA Manual Page Visual Visual 540-5
6 Step 2. Map the conveyance system Manual Page Visual Visual 540-6
7 Credit points Manual Page Impact adjustment Visual Visual 540-7
8 Documentation (1) At the verification visit (a) Procedures (b) Conveyance system map (c) Conveyance system inventory (d) Records of inspections and maintenance (e) EHP community certification (2) With recertification: (a) Examples of records from the previous year Manual Page Visual Visual 540-8
9 EHP Community Certification 540 Drainage System Maintenance Manual Appendix F Visual Visual 540-9
10 542.b Problem site maintenance (PSM) Credit criteria (1) Meet activity criteria (2) Must get CDR credit (3) Written procedures (4) Sites are on the map (5) Procedures include: (a) Inspect more often (b) Inspect after storm (c) Take action Manual Page Visual Visual
11 542.b Problem site maintenance (PSM) Procedures (1) List each site Why different Inspection procedures Who is responsible (2) Records Manual Page Problem site Problem site Visual Visual
12 542.b Problem site maintenance (PSM) Credit points PSM = 50 Impact adjustment rpsm = rcdr Documentation Procedures Records Recertification Records Manual Pages Visual Visual
13 542.c Capital improvement program (CIP) Manual Page Ongoing program to make permanent changes Not for a program of continuous maintenance or one-time projects Creditable examples: Enlarge culvert & bridge openings to eliminate bottlenecks Install permanent hard or soft bank protection measures Install grates to catch debris during high flows New retention basins to reduce flows into existing channels Convert problem channels into low-maintenance channels Visual Visual
14 542.c Capital improvement program (CIP) Credit criteria (1) Meet activity criteria (2) Must get CDR credit (3) Sites must be part of the conveyance system (4) Master list (5)[For full credit] engineering analysis (6) Annual expenditures Manual Page Projects that reduce flood levels may be eligible for 530 credit Visual Visual
15 542.c Capital improvement program (CIP) Credit points CIP = 30 CIP = 70 if engineering analysis Impact adjustment rcip = rcdr Documentation (i) Master list of sites needing work (ii) Recommendations for the sites (iii) Show funds spent each year (iv) [For 70 points] Engineering analysis Manual Page Visual Visual
16 542.d Stream dumping regulations (SDR) Manual Page Visual Visual
17 542.d Stream dumping regulations (SDR) Credit criteria (1) Must get CDR credit (2) Regulations must: Be enforced throughout community Designate responsible office Have enforcement procedures (3) Additional credit with publicity Manual Page Visual Visual
18 542.d Stream dumping regulations (SDR) Credit points SDR = 15 SDR = 25 if publicized SDR = 30 if publicized via PPI Impact adjustment None Documentation (a) The regulations (b) [For > 15 points] Publicity Manual Pages Visual Visual
19 541.a Activity description Storage basins: all constructed stormwater runoff detention or retention facilities located on public and private property. Manual Page Visual Visual
20 542.e Storage basin maintenance (SBM) Manual Page Visual Visual
21 542.e Storage basin maintenance (SBM) Credit criteria (1) Meet activity criteria (2) Must get SMR/PUB credit (3) Inspections: (a) At least annually (b) Upon complaint (c) After big storms (4) Map all the basins (5) Inventory the basins (6) Records Manual Page Visual Visual
22 542.e Storage basin maintenance (SBM) Procedures (1) Inventory of all the basins (2) Inspection procedures (3) Maintenance procedures (4) Records Manual Page Credit points SBM = 120 Visual Visual
23 542.e Storage basin maintenance (SBM) Documentation (1) At the visit (a) Procedures (b) Map (c) Inventory (d) Records (e) EHP certification (f) Relevant permits (2) At recertification (a) Records Manual Pages Visual Visual
24 Questions? Visual Visual
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