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      <ActivityOrMissionDescription>See Schedule ODenver Zoo, established in 1896, is dedicated to protecting wildlife and fostering a world where humans and animals can thrive together. Denver Zoo's mission is to secure a better world for animals through human understanding. The zoo strives to achieve its mission by adhering to six core values:Protect: We commit to saving animals and ensuring their long-term survival.Honor: We treat our public, animals, volunteers and staff with respect.Innovate: We strive to discover creative solutions through progressive thinking, practices and partnerships.Engage: We connect people with animals and inspire everyone to respect the natural world.Empower: We equip our communities with the knowledge to take positive action for all species.Serve: We deliver exceptional service to our customers.</ActivityOrMissionDescription>
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      <Description>Animal Care and ResearchThe purpose of Denver Zoo's animal care and research programs is to provide exceptional animal care to the 3,554 animals that call Denver Zoo home and to make meaningful global contributions to the conservation of animals and their ecosystems. Denver Zoo's animal care program is recognized for its enrichment and operant conditioning training which seeks to create opportunities for animals to exercise their natural behaviors and, through positive reinforcement, to participate in their own health care by presenting different body parts for examination or treatments by keepers and veterinarians with minimal stress to the animal. These training sessions are a key component of the bond that zookeepers build with the animals in their care. Working with an animal nutritionist, each animal receives a custom diet designed for its individual needs. These diets consist of the highest grades of fruits, vegetables, grains, fish and meats. In 2010, the animal care team welcomed the births of various endangered species.Denver Zoo's hospital has a staff of three full-time veterinarians and three technicians and provides the highest quality animal health care. This team possesses the knowledge to care for 700 different species of animals and can respond to nearly any emergency with the resources on-property. Denver Zoo's commitment to global conservation is represented through the 92 field conservation and research projects led by Denver Zoo staff or research associates during 2010. The Zoo's Conservation/Biology Department is dedicated to field research and animal conservation projects around the globe. Since the Department was created in 1996, the zoo has participated in over 568 projects in 57 countries on all continents. Conservation projects focus on key species and landscape conservation planning, a widely-accepted method of conserving large ecological systems. Projects in Mongolia, Kenya, Peru, Vietnam, Indonesia and the western United States were a focus in 2010. In December of 2010, Denver Zoo and the Mongolian Academy of Sciences were honored by the United Nations fourteen years after establishing a research camp in Mongolia's Ikh Nart Nature Reserve. The U.N.'s Development Programme (UNDP) designated the conservation work the zoo and academy have performed at the reserve as a "model program." The program in Ikh Nart will be used as an example to be replicated and adapted to other parks and reserves in Mongolia. Also of note, in August 2010, The American Association of Zookeepers' Excellence in Animal Care Award was presented to Denver Zoo's Predator Ridge team in recognition of "achievement of an individual or team in the animal care field and in fostering professionalism."</Description>
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        <Description>Education and Volunteer ProgramsEducation is a major focus for Denver Zoo, with a variety of programs available for diverse audiences, both at the zoo and at schools and other locations throughout the Denver metro area. The zoo reaches out to diverse audiences, especially underserved populations that historically have not participated in programs offered by scientific and cultural facilities. We have strategically sought collaborations with partners that have earned the trust of underrepresented audiences. In 2010, over 53,000 students participated in on-site classes, assemblies, science workshops, career programs, our popular Bunk with the Beasts program, Summer Safari (a day camp) and other programs. This number does not include students who visited the zoo on field trips. Nearly 85,000 children and adults participated in education outreach programming, primarily Pre-K through 12th grade students. In 2010, 714 volunteers gave 80,034 hours of their time to Denver Zoo - an average of 144 hours per person. Volunteers dedicated their time to enhancing the visitor experience, supporting staff, helping to care for animals, providing education programs in schools, community centers and Senior Centers, helping to foster empathy for animals, and conservation. Denver Zoo's "Zoo Crew" Teen Volunteer program which provides volunteering opportunities for youth ages 13-18, had</Description>
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        <Description>Other Programs includes: Certificates of Participation, Member Services, Guest Services, Horticulture and Interns. Certificates of Participation is an account funded by $1.00/per paid admission and is used to reimburse the city for providing $8.5 million of the balance of parking garage construction expenses in 2001. Member Services includes the expenses associated with obtaining new members and retaining our 57,356 household members. Guest Services is the department that provides all aspects of customer service from guest relations staff to security for the approximately 2,000,000 on-grounds visitors. The Horticulture department maintains all landscapes, grounds, and irrigation for the entire Zoo, including animal exhibits. The internship program is for college students who are working towards a degree in a field related to their area of interest at the Zoo.</Description>
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      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Kevin Fitzgerald PhD DVM</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>4.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Dennis J O'Malley</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>4.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Kevin Patterson</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>4.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Patricia Barela Rivera</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>4.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Dr Charles H Scoggin</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>4.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Elizabeth B Searle</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>4.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Jo Ann Semple</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>4.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Sue Stevinson</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>4.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Sharon K Swiatek</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>4.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
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        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Sid Wilson</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>4.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
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        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Laurie Lind Galbreath</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>4.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Constance F Graham</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>4.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Lynn Luce Kitt</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>4.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
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        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Kelly Matthews</NamePerson>
        <Title>Trustee</Title>
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        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Nina Henderson Moore</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>4.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Kathy Ogsbury</NamePerson>
        <Title>Trustee</Title>
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        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Stephen L Stieneker</NamePerson>
        <Title>Trustee</Title>
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        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
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        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Joanna Scott Picher</NamePerson>
        <Title>Trustee</Title>
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        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
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        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Craig Piper</NamePerson>
        <Title>Pres/CEO</Title>
        <AverageHoursPerWeek>40.00</AverageHoursPerWeek>
        <Officer>X</Officer>
        <ReportableCompFromOrganization>228857</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>86895</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Kyle Burks</NamePerson>
        <Title>VP/COO</Title>
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        <Officer>X</Officer>
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        <OtherCompensation>34353</OtherCompensation>
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        <NamePerson>Donna Driscoll</NamePerson>
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        <OtherCompensation>28776</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Pat Moredock</NamePerson>
        <Title>Assistant Secretary</Title>
        <AverageHoursPerWeek>40.00</AverageHoursPerWeek>
        <Officer>X</Officer>
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        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>10008</OtherCompensation>
      </Form990PartVIISectionA>
      <TotalReportableCompFromOrg>564992</TotalReportableCompFromOrg>
      <TotalReportableCompFrmRltdOrgs>0</TotalReportableCompFrmRltdOrgs>
      <TotalOtherCompensation>160032</TotalOtherCompensation>
      <NumberIndividualsGT100K>3</NumberIndividualsGT100K>
      <FormersListed>0</FormersListed>
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      <ContractorCompensation>
        <NameOfContractor>
          <NameBusiness>
            <BusinessNameLine1>Kiewit Construction</BusinessNameLine1>
          </NameBusiness>
        </NameOfContractor>
        <AddressOfContractor>
          <AddressUS>
            <AddressLine1>7200 S Alton Way Ste A-300</AddressLine1>
            <City>Englewood</City>
            <State>CO</State>
            <ZIPCode>80112</ZIPCode>
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        </AddressOfContractor>
        <DescriptionOfServices>Construction</DescriptionOfServices>
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      <ContractorCompensation>
        <NameOfContractor>
          <NameBusiness>
            <BusinessNameLine1>CLR Design Inc</BusinessNameLine1>
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        <AddressOfContractor>
          <AddressUS>
            <AddressLine1>833 Chestnut Street Suite 1000</AddressLine1>
            <City>Philadelphia</City>
            <State>PA</State>
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        </AddressOfContractor>
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      <ContractorCompensation>
        <NameOfContractor>
          <NameBusiness>
            <BusinessNameLine1>KM Concessions Inc</BusinessNameLine1>
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        </NameOfContractor>
        <AddressOfContractor>
          <AddressUS>
            <AddressLine1>4699 Marion Street</AddressLine1>
            <City>Denver</City>
            <State>CO</State>
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        </AddressOfContractor>
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      <ContractorCompensation>
        <NameOfContractor>
          <NameBusiness>
            <BusinessNameLine1>ECOS Communications</BusinessNameLine1>
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        <AddressOfContractor>
          <AddressUS>
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            <City>Boulder</City>
            <State>CO</State>
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        <NameOfContractor>
          <NameBusiness>
            <BusinessNameLine1>Malenke Barnhart LLC</BusinessNameLine1>
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          <AddressUS>
            <AddressLine1>1614 15th Street</AddressLine1>
            <City>Denver</City>
            <State>CO</State>
            <ZIPCode>80202</ZIPCode>
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      <NumberOfContractorsGT100K>12</NumberOfContractorsGT100K>
      <FederatedCampaigns>2742</FederatedCampaigns>
      <MembershipDues>4741497</MembershipDues>
      <FundraisingEvents>555006</FundraisingEvents>
      <RelatedOrganizations>280000</RelatedOrganizations>
      <GovernmentGrants>6220333</GovernmentGrants>
      <AllOtherContributions>2331155</AllOtherContributions>
      <NoncashContributions>37288</NoncashContributions>
      <TotalContributions>14130733</TotalContributions>
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        <Description>Admission &amp; concession</Description>
        <BusinessCode>900099</BusinessCode>
        <TotalRevenueColumn>8639775</TotalRevenueColumn>
        <RelatedOrExemptFunctionIncome>8639775</RelatedOrExemptFunctionIncome>
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      <ProgramServiceRevenue>
        <Description>Marketing &amp; membership</Description>
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      <ProgramServiceRevenue>
        <Description>Education</Description>
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        <ExclusionAmount>62274</ExclusionAmount>
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      <CntrbtnsRprtdFundraisingEvents>555006</CntrbtnsRprtdFundraisingEvents>
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      <NetIncomeFromFundraisingEvents>
        <TotalRevenueColumn>0</TotalRevenueColumn>
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        <Description>Miscellaneous program</Description>
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        <TotalRevenueColumn>102462</TotalRevenueColumn>
        <ExclusionAmount>102462</ExclusionAmount>
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      <TotalRevenue>
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        <RelatedOrExemptFunctionIncome>11329809</RelatedOrExemptFunctionIncome>
        <UnrelatedBusinessRevenue>0</UnrelatedBusinessRevenue>
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      <GrantsToDomesticOrgs>
        <Total>55700</Total>
        <ProgramServices>55700</ProgramServices>
      </GrantsToDomesticOrgs>
      <GrantsToDomesticIndividuals>
        <Total>5000</Total>
        <ProgramServices>5000</ProgramServices>
      </GrantsToDomesticIndividuals>
      <ForeignGrants>
        <Total>229658</Total>
        <ProgramServices>229658</ProgramServices>
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      <CompCurrentOfficersDirectors>
        <Total>738245</Total>
        <ManagementAndGeneral>738245</ManagementAndGeneral>
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        <Total>14176572</Total>
        <ProgramServices>12197056</ProgramServices>
        <ManagementAndGeneral>700168</ManagementAndGeneral>
        <Fundraising>1279348</Fundraising>
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      <FeesForServicesLegal>
        <Total>33862</Total>
        <ManagementAndGeneral>33862</ManagementAndGeneral>
      </FeesForServicesLegal>
      <FeesForServicesAccounting>
        <Total>52000</Total>
        <ManagementAndGeneral>52000</ManagementAndGeneral>
      </FeesForServicesAccounting>
      <FeesForServicesOther>
        <Total>763455</Total>
        <ProgramServices>752816</ProgramServices>
        <ManagementAndGeneral>2017</ManagementAndGeneral>
        <Fundraising>8622</Fundraising>
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      <Advertising>
        <Total>519991</Total>
        <Fundraising>519991</Fundraising>
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      <OfficeExpenses>
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        <ProgramServices>2081726</ProgramServices>
        <ManagementAndGeneral>107218</ManagementAndGeneral>
        <Fundraising>116667</Fundraising>
      </OfficeExpenses>
      <InformationTechnology>
        <Total>160521</Total>
        <ProgramServices>793</ProgramServices>
        <ManagementAndGeneral>159728</ManagementAndGeneral>
      </InformationTechnology>
      <Occupancy>
        <Total>1740629</Total>
        <ProgramServices>1740629</ProgramServices>
      </Occupancy>
      <Travel>
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        <ProgramServices>102192</ProgramServices>
        <ManagementAndGeneral>68747</ManagementAndGeneral>
        <Fundraising>4570</Fundraising>
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      <DepreciationDepletion>
        <Total>204435</Total>
        <ProgramServices>204435</ProgramServices>
      </DepreciationDepletion>
      <Insurance>
        <Total>151014</Total>
        <ProgramServices>74776</ProgramServices>
        <ManagementAndGeneral>76238</ManagementAndGeneral>
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      <OtherExpenses>
        <Description>Exhibits improvements</Description>
        <Total>21365253</Total>
        <ProgramServices>21365253</ProgramServices>
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      <OtherExpenses>
        <Description>Cert. of participation</Description>
        <Total>635676</Total>
        <ProgramServices>635676</ProgramServices>
      </OtherExpenses>
      <OtherExpenses>
        <Description>Education expenses</Description>
        <Total>339213</Total>
        <ProgramServices>339213</ProgramServices>
      </OtherExpenses>
      <OtherExpenses>
        <Description>Wildlights/other events</Description>
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        <ProgramServices>57440</ProgramServices>
        <Fundraising>102680</Fundraising>
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      <OtherExpenses>
        <Description>Repairs and maintenance</Description>
        <Total>153508</Total>
        <ProgramServices>153508</ProgramServices>
      </OtherExpenses>
      <AllOtherExpenses>
        <Total>1502340</Total>
        <ProgramServices>750240</ProgramServices>
        <ManagementAndGeneral>296805</ManagementAndGeneral>
        <Fundraising>455295</Fundraising>
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      <TotalFunctionalExpenses>
        <Total>45468312</Total>
        <ProgramServices>40746111</ProgramServices>
        <ManagementAndGeneral>2235028</ManagementAndGeneral>
        <Fundraising>2487173</Fundraising>
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      <JointCosts>X</JointCosts>
      <CashNonInterestBearing>
        <BOY>831916</BOY>
        <EOY>1468682</EOY>
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        <BOY>44564162</BOY>
        <EOY>28534795</EOY>
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        <BOY>4169235</BOY>
        <EOY>2972704</EOY>
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        <EOY>643355</EOY>
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      <LandBuildingsEquipmentBasis>2013871</LandBuildingsEquipmentBasis>
      <LandBldgEquipmentAccumDeprec>1659145</LandBldgEquipmentAccumDeprec>
      <LandBuildingsEquipmentBasisNet>
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        <EOY>354726</EOY>
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      <InvestmentsPubTradedSecurities>
        <BOY>267368</BOY>
        <EOY>278168</EOY>
      </InvestmentsPubTradedSecurities>
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        <BOY>50865186</BOY>
        <EOY>34252430</EOY>
      </TotalAssets>
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        <EOY>6081473</EOY>
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        <EOY>6081473</EOY>
      </TotalLiabilities>
      <FollowSFAS117>X</FollowSFAS117>
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        <BOY>8893457</BOY>
        <EOY>9836077</EOY>
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      <TemporarilyRestrictedNetAssets>
        <BOY>39120534</BOY>
        <EOY>18334880</EOY>
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        <BOY>48013991</BOY>
        <EOY>28170957</EOY>
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      <TotalLiabNetAssetsFundBalances>
        <BOY>50865186</BOY>
        <EOY>34252430</EOY>
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      <ReconcilationRevenueExpenses>-19843034</ReconcilationRevenueExpenses>
      <ReconcilationOtherChanges>0</ReconcilationOtherChanges>
      <InfoInScheduleOPartXII>X</InfoInScheduleOPartXII>
      <MethodOfAccountingAccrual>X</MethodOfAccountingAccrual>
      <AccountantCompileOrReview>0</AccountantCompileOrReview>
      <FSAudited>1</FSAudited>
      <AuditCommittee>1</AuditCommittee>
      <FinancialStatementConsolidated>X</FinancialStatementConsolidated>
      <FederalGrantAuditRequired>0</FederalGrantAuditRequired>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PubliclySupportedOrg170b1Avi>X</PubliclySupportedOrg170b1Avi>
      <GiftsGrantsContribReceived170>
        <CurrentTaxYearMinus4Years>3527660</CurrentTaxYearMinus4Years>
        <CurrentTaxYearMinus3Years>5711519</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>5739582</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>31699716</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>3168903</CurrentTaxYear>
        <Total>49847380</Total>
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        <CurrentTaxYearMinus3Years>6551742</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>6739624</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>5870382</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>6220333</CurrentTaxYear>
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        <CurrentTaxYearMinus2Years>2086668</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>2090600</CurrentTaxYearMinus1Year>
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      <Total170>
        <CurrentTaxYearMinus4Years>11159731</CurrentTaxYearMinus4Years>
        <CurrentTaxYearMinus3Years>13992391</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>14565874</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>39660698</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>9389236</CurrentTaxYear>
        <Total>88767930</Total>
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        <CurrentTaxYearMinus4Years>620426</CurrentTaxYearMinus4Years>
        <CurrentTaxYearMinus3Years>601740</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>329750</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>112792</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>62274</CurrentTaxYear>
        <Total>1726982</Total>
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      <CompBasedNetEarningsRelateOrgs>0</CompBasedNetEarningsRelateOrgs>
      <AnyNonFixedPayments>1</AnyNonFixedPayments>
      <InitialContractException>0</InitialContractException>
      <Form990ScheduleJPartII>
        <NamePerson>Craig Piper</NamePerson>
        <BaseCompensationFilingOrg>189857</BaseCompensationFilingOrg>
        <CompBasedOnRelatedOrgs>0</CompBasedOnRelatedOrgs>
        <BonusFilingOrg>39000</BonusFilingOrg>
        <BonusRelatedOrgs>0</BonusRelatedOrgs>
        <OtherCompensationFilingOrg>0</OtherCompensationFilingOrg>
        <OtherCompensationRelatedOrgs>0</OtherCompensationRelatedOrgs>
        <DeferredCompFilingOrg>75803</DeferredCompFilingOrg>
        <DeferredCompRelatedOrgs>0</DeferredCompRelatedOrgs>
        <NontaxableBenefitsFilingOrg>11092</NontaxableBenefitsFilingOrg>
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        <TotalCompensationFilingOrg>315752</TotalCompensationFilingOrg>
        <TotalCompensationRelatedOrgs>0</TotalCompensationRelatedOrgs>
        <CompReportPrior990FilingOrg>39000</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartII>
        <NamePerson>Kyle Burks</NamePerson>
        <BaseCompensationFilingOrg>137687</BaseCompensationFilingOrg>
        <CompBasedOnRelatedOrgs>0</CompBasedOnRelatedOrgs>
        <BonusFilingOrg>20000</BonusFilingOrg>
        <BonusRelatedOrgs>0</BonusRelatedOrgs>
        <OtherCompensationFilingOrg>0</OtherCompensationFilingOrg>
        <OtherCompensationRelatedOrgs>0</OtherCompensationRelatedOrgs>
        <DeferredCompFilingOrg>30000</DeferredCompFilingOrg>
        <DeferredCompRelatedOrgs>0</DeferredCompRelatedOrgs>
        <NontaxableBenefitsFilingOrg>4353</NontaxableBenefitsFilingOrg>
        <NontaxableBenefitsRelatedOrgs>0</NontaxableBenefitsRelatedOrgs>
        <TotalCompensationFilingOrg>192040</TotalCompensationFilingOrg>
        <TotalCompensationRelatedOrgs>0</TotalCompensationRelatedOrgs>
        <CompReportPrior990FilingOrg>20000</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartII>
        <NamePerson>Donna Driscoll</NamePerson>
        <BaseCompensationFilingOrg>111761</BaseCompensationFilingOrg>
        <CompBasedOnRelatedOrgs>0</CompBasedOnRelatedOrgs>
        <BonusFilingOrg>10000</BonusFilingOrg>
        <BonusRelatedOrgs>0</BonusRelatedOrgs>
        <OtherCompensationFilingOrg>0</OtherCompensationFilingOrg>
        <OtherCompensationRelatedOrgs>0</OtherCompensationRelatedOrgs>
        <DeferredCompFilingOrg>24423</DeferredCompFilingOrg>
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        <TotalCompensationRelatedOrgs>0</TotalCompensationRelatedOrgs>
        <CompReportPrior990FilingOrg>10000</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartIII>
        <ReturnReference>Part I, Line 7</ReturnReference>
        <Explanation>Craig Piper, Kyle Burks, Donna Driscoll and Jean Ellis received bonuses in 2010.</Explanation>
      </Form990ScheduleJPartIII>
    </IRS990ScheduleJ>
    <IRS990ScheduleM documentId="RetDoc1042900001">
      <OtherNonCashContributionsTable>
        <NonCashCheckbox>X</NonCashCheckbox>
        <Description>Animal supplies</Description>
        <NumberOfContributions>43</NumberOfContributions>
        <NoncashContribsRptdF990>4415</NoncashContribsRptdF990>
        <MethodOfDeterminingRevenues>FMV at date of contribution</MethodOfDeterminingRevenues>
      </OtherNonCashContributionsTable>
      <OtherNonCashContributionsTable>
        <NonCashCheckbox>X</NonCashCheckbox>
        <Description>Education supplies</Description>
        <NumberOfContributions>2</NumberOfContributions>
        <NoncashContribsRptdF990>220</NoncashContribsRptdF990>
        <MethodOfDeterminingRevenues>FMV at date of contribution</MethodOfDeterminingRevenues>
      </OtherNonCashContributionsTable>
      <OtherNonCashContributionsTable>
        <NonCashCheckbox>X</NonCashCheckbox>
        <Description>Horiculture supplies</Description>
        <NumberOfContributions>5</NumberOfContributions>
        <NoncashContribsRptdF990>16339</NoncashContribsRptdF990>
        <MethodOfDeterminingRevenues>FMV at date of contribution</MethodOfDeterminingRevenues>
      </OtherNonCashContributionsTable>
      <OtherNonCashContributionsTable>
        <NonCashCheckbox>X</NonCashCheckbox>
        <Description>Maintenance supplies</Description>
        <NumberOfContributions>44</NumberOfContributions>
        <NoncashContribsRptdF990>16314</NoncashContribsRptdF990>
        <MethodOfDeterminingRevenues>FMV at date of contribution</MethodOfDeterminingRevenues>
      </OtherNonCashContributionsTable>
      <AnyPropertyThatMustBeHeld>0</AnyPropertyThatMustBeHeld>
      <ReviewProcessUnusualNCGifts>1</ReviewProcessUnusualNCGifts>
      <ThirdPartiesUsed>1</ThirdPartiesUsed>
      <Form990ScheduleMPartII>
        <Identifier>Third Party Use:</Identifier>
        <ReturnReference>Part I, Line 32b:</ReturnReference>
        <Explanation>Denver Zoological Foundation uses Cars Helping Charities to solicit and process donated vehicles. There is a link through DZF's website to Cars Helping Charities for people who wish to donate vehicles to DZF. Cars Helping Charities then collects the car, sells it and remits a portion of the sale to DZF.</Explanation>
      </Form990ScheduleMPartII>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <GeneralExplanation>
        <Identifier>Form 990, Part VI, Section A, line 2</Identifier>
        <Explanation>Kelly Matthews and Robert H. Bach both serve as Denver Zoo trustees. Kelly Matthews and Robert H. Bach were both partners with Holme, Roberts, and Owen LLP for a portion of 2010.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990, Part VI, Section B, line 11</Identifier>
        <Explanation>The Form 990 is reviewed in detail by the members of the Zoo's Finance Committee. After the committee's approval, the Form 990 is then presented to the board for its approval. All board members are provided the opportunity to review the Form 990 before it is submitted to the IRS.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section B, line 12c</ReturnReference>
        <Explanation>Conflict of interest questionnaires are completed annually by all officers, directors or trustees, and key employees. Trustees who have a beneficial interest in a decision are excused from discussion and voting rights. Also, if the item of purchase is a tangible asset with potential conflicts of interest, staff is required to get multiple bids for the item.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section B, line 15</ReturnReference>
        <Explanation>There are several factors, monetary and nonmonetary, that are considered in determining executive compensation. These business-related factors include: Budget: Does the budget allow for any flexibility in the offer and what is the relative financial health of our organization? Internal equity: What are other executives in the same type of job or at the same job level being paid? Market price/external demands: Is this job difficult to fill or is it hard to find qualified candidates in this location or industry? Candidates' level of experience: How many years of relevant experience does this person bring to the table? Candidates' education level: What degrees does the person have that will benefit our organization? Candidates' current compensation package: What is this person's current base pay and benefits package? Salary surveys: What are other executives in the same type of job being paid at other non-profit organizations of the same size? Once the salary is determined, the executive committee (which consists of independent board members) reviews this information. Written employment agreements are also used.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section C, line 18</ReturnReference>
        <Explanation>The organization's Form 1023 and Form 990 are available to the public upon request.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section C, line 19</ReturnReference>
        <Explanation>The organization's governing documents, conflict of interest policy, and financial statements are made available to the public upon request. The Zoo's articles of incorporation and annual reports are also on file with the Colorado Secretary of State.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part XII, Line 2c:</ReturnReference>
        <Explanation>The Denver Zoological Foundation's Board of Trustees assume the responsibility for oversight of the audit of its financial statements and selection of an independent accountant. This process has not changed from prior years. Form 990, Part I, Line 19: The Denver Zoo's net loss for 2010 of ($19,843,034) resulted primarily from expenditures incurred during the year for zoo improvements. Under the Zoo's current Cooperative Agreement with the City and County of Denver, the Denver Zoo does not retain ownership to any improvements that the Denver Zoo constructs. As such, improvements completed by the Denver Zoo in 2010 totaling $21,365,253 were expensed. The Denver Zoo received bond proceeds from the City and County of Denver and raised matching contributions related to the improvements during 2010 and prior years.</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="RetDoc1043400001">
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>Colorado Zoological Trust</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>2300 Steele Street</AddressLine1>
          <City>Denver</City>
          <State>CO</State>
          <ZIPCode>80205</ZIPCode>
        </AddressUS>
        <EIN>841440122</EIN>
        <PrimaryActivities>Support of the Denver Zoological Foundation</PrimaryActivities>
        <LegalDomicileState>CO</LegalDomicileState>
        <ExemptCodeSection>501(c)(3)</ExemptCodeSection>
        <PublicCharityStatus>Line 11a</PublicCharityStatus>
        <DirectControllingEntityNA>N/A</DirectControllingEntityNA>
        <ControlledOrg>0</ControlledOrg>
      </Form990ScheduleRPartII>
      <ReceiptOfIntAnnRentsRoyalties>0</ReceiptOfIntAnnRentsRoyalties>
      <GiftGrantOrCapContrToOtherOrg>0</GiftGrantOrCapContrToOtherOrg>
      <GiftGrantOrCapContrFrOtherOrg>1</GiftGrantOrCapContrFrOtherOrg>
      <LoansOrGuaranteesToOtherOrg>0</LoansOrGuaranteesToOtherOrg>
      <LoansOrGuaranteesFromOtherOrg>0</LoansOrGuaranteesFromOtherOrg>
      <SaleOfAssetsToOtherOrg>0</SaleOfAssetsToOtherOrg>
      <PurchaseOfAssetsFromOtherOrg>0</PurchaseOfAssetsFromOtherOrg>
      <ExchangeOfAssets>0</ExchangeOfAssets>
      <RentalOfFacilitiesToOtherOrgs>0</RentalOfFacilitiesToOtherOrgs>
      <RentalOfFacilitiesFrOtherOrgs>0</RentalOfFacilitiesFrOtherOrgs>
      <PerformOfServicesForOtherOrgs>0</PerformOfServicesForOtherOrgs>
      <PerformOfServicesByOtherOrgs>0</PerformOfServicesByOtherOrgs>
      <SharingOfFacilities>1</SharingOfFacilities>
      <SharingOfPaidEmployees>1</SharingOfPaidEmployees>
      <ReimbursementPaidToOtherOrg>0</ReimbursementPaidToOtherOrg>
      <ReimbursementPaidByOtherOrg>0</ReimbursementPaidByOtherOrg>
      <OtherTransferToOtherOrg>0</OtherTransferToOtherOrg>
      <OtherTransferFromOtherOrg>0</OtherTransferFromOtherOrg>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>Colorado Zoological Trust</BusinessNameLine1>
        </NameOfOtherOrganization>
        <TransactionType>C</TransactionType>
        <AmountInvolved>280000</AmountInvolved>
        <MethodOfAmtDetermination>FMV</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
    </IRS990ScheduleR>
  </ReturnData>
</Return>