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5.6.9.   NOISE CONTROL DISTRICT FOR DMAFB ENVIRONS
   A.    - 65-70
      1.   Performance Standards
      The following performance standards apply in the :
         a.   The following uses shall be sound attenuated, to reduce the interior noise level by 25 decibels, to 40-45 , in accordance with the Technical Standards Manual:
            (1)    -built residential uses;
            (2)   Places of ; and,
            (3)   Administrative and Professional Offices.
         b.   A manufactured housing unit is not considered equivalent to a single- dwelling within the boundaries of , unless located on a property zoned MH-1 or MH-2 or unless it can be demonstrated that the unit provides sound attenuation to reduce the interior noise level by 25 decibels in accordance with the Technical Standards Manual.
      2.   Prohibited Uses
      The following are not permitted within the :
         a.   Civic Use Group
            (1)   Civil Assembly - Outdoor; and,
            (2)   Educational Use - Elementary and Secondary.
         b.    Commercial Use
            (1)   Day Care;
            (2)   Entertainment - Outdoor; and,
            (3)   Medical Services - Major and Extended Care.
         c.   Residential Use Group (all uses in the group except as provided below)
      3.   Exceptions
      Single- dwellings are permitted in the only if the property is zoned IR, RH, SR, RX-1, RX-2, R-1, R-2, R-3, MH-1 and MH-2 and such was in place prior to January 1, 2005.
   B.    - 70+
      1.   Performance Standards
      The following performance standards apply in the :
         a.   The following uses shall be provided with sound attenuation to reduce the interior noise level by 25 decibels in accordance with the Technical Standards Manual:
            (1)    -built residential uses;
            (2)   Places of ; and,
            (3)   Administrative and Professional Offices.
      2.   A manufactured housing unit is not considered equivalent to a single- dwelling within the boundaries of , unless located on a property zoned MH-1 or MH-2 or unless it can be demonstrated that the unit provides sound attenuation to reduce the interior noise level by 25 decibels in accordance with the Technical Standards Manual.
      3.   Prohibited Uses
      The following uses are not permitted in the :
         a.   Civic Uses Group
            (1)   Cemetery;
            (2)   Civic Assembly - Outdoor;
            (3)   Cultural Use;
            (4)   Educational Use; and,
            (5)   Religious.
         b.   Commercial Use
            (1)   Day Care;
            (2)   Entertainment - Indoor and Outdoor; and,
            (3)   Medical Services - Major and Extended Care.
         c.   Residential Use Group (all uses in the group except as provided in Section 5.6.9.B.4 below).
      4.   Exceptions
      Single- dwellings are permitted in the only if the property is zoned IR, RH, SR, RX-1, RX-2, R-1, R-2, R-3, MH-1 or MH-2 and such was in place prior to January 1, 2005.
5.6.10.   SPECIAL EXCEPTION
   A.    proposing to exceed the limits of the Performance Standards established in Sections 5.6.8.A, B. and C, are processed in accordance with Section 3.4.3, Zoning Examiner Special Exception Procedure. These applications are analyzed for: 1)   with base operations, 2) proximity to the end of the runway, 3) location in relationship to major flight tracks, and 4) compliance with the intent of the DM Joint Study.
   B.   In addition to the notice required for Special Exception applications, the Davis-Monthan Air Force Base shall be notified of all such applications within the boundaries of the DMAFB Environs.
5.6.11.    FOR TIA AND DMAFB ENVIRONS
   No , use of land, or tree may exceed the height limitations by the within the Environs (AEZ). Refer to official maps established. Certain uses are prohibited from these districts as noted below and as determined by the Federal Aviation Administration (FAA).
   A.   The are identified on the Environs (AEZ) Maps and are established as follows:
      1.   Tucson International
      The height limits around Tucson International are based on distances away from the established ends of runways. The mean sea level (MSL) elevations of the established ends of runways are as follows:
         a.   NE end of runway 21 is 2,567 feet MSL;
         b.   SW end of runway 3 is 2,561 feet MSL;
         c.   NW end of runway 11L is 2,575 feet MSL;
         d.   SE end of runway 29R is 2,641 feet MSL;
         e.   NW end of runway 11R is 2,583 feet MSL; and,
         f.   SE end of runway 29L is 2,660 feet MSL.
      2.   Davis-Monthan Air Force Base
      The height limits around Davis-Monthan Air Force Base are based on distances away from the established ends of runways and also on a conical or inclined surface extending outward and upward from the established runway elevation at a ratio of 60:1. The established ends of runway MSL elevations are as follows:
         a.   NW end of the NW/SE runway is 2,590 MSL; and,
         b.   SE end of the NW/SE runway is 2,705 MSL.
   B.   Height Measurement
   The height of a , , or tree is measured from the MSL elevation at the end of the runway to a point specified in Section 6.4.4, Height, or to the highest point of a tree. (See Figure 5.6-A.)
Figure 5.6-A: Height Measurement in
   C.   Conflicts in Heights
   Where two or more height restrictions are placed on a , the more restrictive height limit prevails. Section 6.4.4.C, Exceptions to Height, do not apply in the AEZ.
   D.   Prohibited Uses
    as defined in Section 11.4.2 are prohibited within the boundaries of the .
   E.   Variances
   Variances from the provisions of Section 5.6.11 are allowed as set forth in accordance with A.R.S. Title 28.
Figure 5.6-B: AEZ Base Map 1
Figure 5.6-C: AEZ Base Map 2
5.7.   ENVIRONMENTAL RESOURCE (ERZ)
5.7.1.   PURPOSE
   These standards are intended to recognize the value of Tucson’s resources, particularly the critical and sensitive wildlife habitat of eastern Pima County associated with public monuments, forests, and preserves. These standards relate to areas associated with Tucson’s public lands and preserves, including Saguaro National Park, Coronado National Forest, and Tucson Mountain Park. It is the intent of these standards to protect valuable habitat resources to the greatest extent possible. , with these public resources, is allowed. This overlay specifically serves to:
   A.   Recognize the social, economic, environmental, biologic, and cultural importance of Saguaro National Park and Tucson Mountain Park to the City of Tucson;
   B.   Buffer Saguaro National Park and Tucson Mountain Park from the impacts of new by allowing that is with preservation of critical wildlife habitat and the Park environs;
   C.   Conserve certain designated washes that extend from the Parks as areas of natural and scenic resources and provide valuable wildlife habitat;
   D.   Complement the City of Tucson Interim Watercourse Improvement Policy that provides for flood control,   , and groundwater recharge through the preservation of designated washes in natural and undisturbed states; and,
   E.   Assist in implementing the policies that call for the preservation of Tucson’s significant natural areas along designated watercourses where identified in adopted area and neighborhood plans.
5.7.2.   APPLICABILITY
   A.   Areas Mapped
    that may contain are shown on a series of maps approved by the Mayor and Council called the Environmental Resource Overlay Maps (ERZ Maps). The ERZ Maps include all along the subject washes that may contain habitat, including those that are not vacant. These maps are based on the Critical and Sensitive Wildlife Habitat Map that the Mayor and Council adopted by Resolution #15149.
   B.   
    is associated with along the following washes and their tributaries as shown on the ERZ Maps: 1) Agua Caliente; 2) Ajo; 3) Anklam; 4) Camino de Oeste; 5) Coronado ; 6) Cuprite; 7) Enchanted Hills; 8) Escalante; 9) Este; 10) Fagan; 11) Flato; 12) Franco; 13) Greasewood; 14) Julian; 15) North Fork ; 16) Petty Ranch; 17) Race Track; 18) Reyes; 19) Rincon Creek; 20) San Juan; 21) Silvercroft; 22) South Fork ; 23) Summit; 24) Tanque Verde Creek; 25) Thomas Sousa; 26) portions of the West Branch of the Santa Cruz; and 27) West Speedway (Painted Hills).
   C.   New
   New that occurs on or proposed that include property designated as an ERZ wash are reviewed for compliance with these standards in accordance with Section 3.3.3, PDSD Approval Procedure.
   D.   Designation, Amendment and Change of Boundaries for ERZ Washes
   Designations of new areas subject to this section and changes to existing designations are processed in accordance with Section 3.5, Rezoning (Change of Zoning) Procedure. For designation of new area within the , the proposed designation shall be reviewed by the Stormwater Advisory Committee (SAC) and Stormwater Technical Advisory Committee (STAC) prior to the public hearing before the Zoning Examiner. The recommendations of the SAC and STAC are forwarded to the Zoning Examiner prior to the public hearing.
   E.   Approved
   Where a recorded shown on the ERZ Maps is resubdivided, it shall comply with these standards.
   F.   Annexation
   As annexation occurs, additional or extensions of may be added to the ERZ Maps.
   G.   Exceptions
   The ERZ standards do not apply to the following:
      1.   Any single- residence or other existing as of July 3, 1990, or any expansion of up to 25% of either an existing residence or other ;
      2.   Any or to be developed with one single- residence where all and the residence and any are located outside of the ;
      3.   Any that was recorded prior to August 3, 1990, as long as:
         a.   Substantial construction occurred within five years of August 3, 1990; and,
         b.   Construction occurs in accordance with the approved .
      4.   Where these standards affect a that is also subject to the Hillside Development (HDZ) standards, these standards do not apply as long as there is no encroachment into the 100-year floodplain.
5.7.3.    OPTIONS
    subject to the ERZ may use one of the two following options.
   A.   No Encroachment in Floodplain
   Where the owner of a or affected by these standards chooses to leave the 100-year floodplain undisturbed, the ERZ does not apply except that temporary fencing shall be placed between the and the floodplain area as provided in Section 5.7.5.B, Temporary Fencing Required. Encroachment of the floodplain is limited to ,  , walkways, or bike paths as provided in Section 5.7.5 , Standards for /Utility Encroachment. (See Figure 5.7-A.)
Figure 5.7-A: No Encroachment in Floodplain (ERZ)
   B.   Study of
   The following information is required when an applicant affected by these standards chooses to do a study of the :
      1.   An (ERR) in accordance with the provisions in the Administrative Manual is required. The ERR is a study of the and documents locations of the and ;
      2.   A plan in accordance with Section 5.7.4.D, Plan, is also required if preservation of the cannot be accomplished as required by the ERZ standards;
      3.   The and, when applicable, the plan is reviewed and considered for approval in accordance with Section 3.3.3, PDSD Approval Procedure; and,
      4.   Permits for grubbing, , construction, or any other shall not be issued until all applicable standards of Section 5.7.4, 5.7.5, and 5.7.6 are met.
5.7.4.    STANDARDS
   A.   Preservation of
   Preservation of 100% of within the for shown on the ERZ Maps are required, except as provided in Sections 5.7.3, Options, and 5.7.5, Standards for /Utility Encroachment. The may be included as part of any required on the .
   B.   Residential
   Residential of four or more are allowed only as provided in Section 8.7.3, Flexible Lot Development (FLD), except as provided in Section 5.7.2.G.2. Use of the FLD shall provide for the maximum amount of preservation while preserving options.
   C.   Nonresidential
   Nonresidential is allowed based on underlying zoning.
   D.    Plan
      1.   Where preservation of the cannot be accomplished as provided in these standards, the owner is required to submit a plan;
      2.   The plan shall include the following:
         a.   A statement of findings as to why 100% preservation of the cannot be accomplished;
         b.   A description of the specific impact of the on existing within the ;
         c.   The proposed techniques to lessen the impacts of the on the . The techniques employed by the should protect remaining and restore disturbed during construction. This may be done through clustering away from substantial amounts of , enhancement of degraded through or restoration, or other means appropriate to the type of (see Figure 5.7-B); and,
         d.   A plan for 100% restoration of the disturbed during construction as detailed in Section 5.7.5.A.6, 7, and 8;
         e.   A plan is reviewed and considered for approval in accordance with Section 3.3.3, PDSD Approval Procedure. In reviewing the statement of findings and the plan, such factors as the amount, quality, and predisturbance condition of the within the ; the contiguity of the ; the presence of any endangered species; the upstream or downstream characteristics of the designated wash; the alternatives to the layout and design of the ; and any other pertinent factors relating to the proposed or the that may be provided by the owner and the reviewing parties shall be taken into consideration.
Figure 5.7-B: Options
   E.   Temporary Fencing Required
   No grubbing, , or construction shall occur on a until areas designated to be retained in a natural state are temporarily fenced.
   F.   Inspection of Fencing
   All temporary fencing shall be field inspected by PDSD before any construction on the begins. Fencing shall be removed only on completion of construction.
5.7.5.   STANDARDS FOR ENCROACHMENT
   A.   Standards
   The following standards are required as part of the plan, when applicable. They are also required for any allowed encroachment into . Encroachment that may be allowed is limited to ,   , walkways, or bike paths.
      1.    , bike path, and walkway and utility encroachments into are limited and approved only if there are no other alternatives in the design of the . Where allowed, , bike path, and walkway and utility encroachments shall cross and not run parallel to the .
      2.   Where , bike path, and walkway are allowed to encroach into , they are allowed only at the narrowest point of the . (See Figure 5.7-C.)
Figure 5.7-C: Riparian Crossing
      3.   All in shall be located underground. shall be placed either along , bike path, or walkway or within approved easements. Water and sewer utility trenches must be set beneath the 100-year scour depth.
      4.   Any , bike path, or walkway improvement that impedes the movement of wildlife shall be constructed in such a manner as to provide means for safe and accessible passage. or encroachments into shall be constructed to minimize disruption of vegetation and . Where culverts are used, they should be box culverts a minimum of six feet in height.
      5.   Where a , walkway, or bike path improvement or utility encroachment occurs within the , shall be required for any area disturbed because of such construction.
      6.    should include plant material salvaged from the .
      7.    should recreate the through the planting of trees, shrubs, and seed mix native to the and be equal to the predisturbance plant , diversity, and volume on the net .
      8.   A maintenance program is required for revegetated/restored or enhanced areas so that plant material is replaced as needed.
   B.   Temporary Fencing Required
   No grubbing, , or construction shall occur on a until areas designated to be retained in a natural state are temporarily fenced. All temporary fencing will be field inspected by PDSD before any construction on the begins. Fencing shall be removed only on completion of construction.
5.7.6.   STANDARDS FOR FENCES, WALLS, AND EXTERIOR LIGHTING
   A.   Fences and Walls
   Neither fences nor walls are allowed that impede wildlife movement through designated except for temporary fencing. If barbed wire fencing is used, the bottom and top wire shall be barbless and a bottom clearance of at least 18 inches from the ground is required.
   B.   Exterior Lighting
   Lighting sources shall be confined to wall-mounted fixtures or standards a maximum of 42 inches in height, spaced to create pools of light rather than a saturated condition. Neither high-pressure sodium nor mercury vapor lighting shall be used. All lighting sources shall be shielded to reduce dispersed light.
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