Mamloo Dam
{{More citations needed|date=May 2023}}
{{Infobox dam
| name = Mamloo Dam
| name_official =
| image = SadMamlooAndDamavand.jpg
| image_size =
| image_caption = A view of Mamloo dam and Mount Damavand
| image_alt =
| location_map = Iran
| location_map_size =
| location_map_caption =
| coordinates = {{coord|35|35|47|N|51|47|13|E|region:IR_type:waterbody_source:dewiki|display=inline,title}}
| country = Iran
| location =
| status =
| construction_began =
| opening =
| demolished =
| cost =
| owner = Tehran Regional Water Authority
| dam_type =
| dam_height =
| dam_length = {{Convert|807|m|ft|0|abbr=on}}
| dam_width_crest = {{Convert|10|m|ft|0|abbr=on}}
| dam_width_base = {{Convert|465|m|ft|0|abbr=on}}
| dam_volume =
| dam_crosses =
| spillway_count =
| spillway_type =
| spillway_capacity =
| res_name =
| res_capacity_total = {{Convert|250000000|m3|acre feet|0|abbr=on}}
| res_capacity_active = {{Convert|222000000|m3|acre feet|0|abbr=on}}
| res_capacity_inactive = {{Convert|28000000|m3|acre feet|0|abbr=on}}
| res_catchment =
| res_surface =
| res_max_depth =
| res_tidal_range =
| plant_operator =
| plant_commission =
| plant_decommission =
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| plant_annual_gen =
| website = https://thrw.ir/st/83
| extra =
}}
Mamloo Dam ({{langx|fa| سد ماملو}}), is a dam in the Central Alborz mountain range of northern Iran near to the Mount Damavand.The reservoir created by the dam has a capacity of about 250 million cubic meters and {{Cite web |website=thrw.ir/ |url=https://thrw.ir/st/83 |title=امور بهره برداری سد ماملو }} It has been built to meet the needs of agricultural water in Varamin plain, but due to the drinking water supply in Tehran, a limited amount of stored water is supplied to the plain. One of the most important effects of the insufficient supply of surface water in Varamin plain is the reduction of groundwater aquifers and land subsidence{{Cite journal |last1=Rajabi |first1=Ali M. |last2=Ghorbani |first2=E. |date=December 2016 |title=Land subsidence due to groundwater withdrawal in Arak plain, Markazi province, Iran |url=http://dx.doi.org/10.1007/s12517-016-2753-7 |journal=Arabian Journal of Geosciences |volume=9 |issue=20 |page=738 |doi=10.1007/s12517-016-2753-7 |bibcode=2016ArJG....9..738R |s2cid=132347236 |issn=1866-7511|url-access=subscription }}
It is located {{convert|35|km}} east of Tehran and {{convert|49|km}} southeast of Mount Damavand.