Portland City Code ch. 14

Citation: Portland City Code ch. 14
Parent Document: Portland City Code ch. 14
Jurisdiction: Portland (municipal)
Original Source: https://www.portlandmaine.gov/asset/ae8cabd1-66eb-4a1c-9224-92bbca5e792f ↗

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unscarified buffer strips before the flow gains 11.4.11 Parking areas
sufficient volume or head to erode the road, Parking areas shall be set back a minimum of 75 feet
driveway, or ditch. To accomplish this, the from the normal high-water or upland edge of a
following shall apply: coastal wetland, freshwater wetland, river, or
1. Ditch relief culverts, drainage dips, and tributary stream within a Shoreland Zone except:
associated water turnouts shall be spaced A. In the EWPZ, WCZ, WPDZ, B-3, B-5/B-5b, I-L,
along the road or driveway at intervals no and I-M zones, parking setbacks shall be as
greater than indicated in Table 11-B. established for structures in those zones, as
2. Drainage dips may be used in place of ditch specified in Subsection 11.4.1(A).
relief culverts only where the grade is 10% B. Where the Planning Board finds that no other
or less. reasonable alternative exists further from the
3. On sections having slopes greater than ten shoreline or tributary stream, the board may
10%, ditch relief culverts shall be placed at reduce the parking setback requirement to no
approximately a 30 degree angle less than 50 feet in the R-OS and I-B zones to
downslope from a line perpendicular to the least amount necessary for construction,
the centerline of the road or driveway. provided that the applicant proves by a
4. Ditch relief culverts shall be sufficiently preponderance of the evidence that
sized and properly installed in order to appropriate techniques will be used to prevent
allow for effective functioning, and their sedimentation of the water body.
inlet and outlet ends shall be stabilized
with appropriate materials. 11.4.12 Septic waste disposal
5. Ditches, culverts, bridges, dips, water All subsurface sewage disposal systems shall be
turnouts, and other storm water runoff installed in conformance with the State of Maine
control installations associated with roads Subsurface Wastewater Disposal Rules and the
and driveways shall be maintained on a following:
regular basis to assure effective A. Clearing or removal of woody vegetation
functioning. necessary to site a new system and any
associated fill extensions, shall not extend
TABLE 11-B: DRAINAGE SPACING closer than 75 feet, horizontal distance, from
Grade (%) Spacing the normal high-water line of a water body or
0-2 250 ft. the upland edge of a wetland.
3-5 200-135 ft. B. A holding tank is not allowed for a first-time
6-10 100-80 ft. residential use in the Shoreland Zone.
11-15 80-60 ft.
16-20 60-45 ft. 11.4.13 Stormwater runoff
21+ 40 ft. All new construction and development shall be
designed to be in compliance with the City of
Portland Technical Manual to minimize stormwater 11-8 | CITY OF PORTLAND LAND USE CODE SHORELAND ZONE

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