Ma'an Dam

{{Short description|Dam in Heping, Taichung, Taiwan}}

{{Infobox dam

| name = Ma'an Dam
馬鞍壩

| name_official =

| image = 馬鞍壩.JPG

| image_size = 220px

| image_caption =

| image_alt =

| location_map = Taichung

| location_map_size = 220px

| location_map_caption =

| location_map_relief =

| coordinates = {{coord|24|11|03|N|120|54|50|E|type:landmark_region:TW|display=inline,title}}

| location = Heping, Taichung, Taiwan

| purpose = hydroelectricity

| status = O

| construction_began = {{start date and age|1992}}

| opening = {{start date and age|1998}}

| demolished =

| cost =

| owner =

| dam_type = concrete gravity barrage dam

| dam_height = {{convert|16.3|m|ft|abbr=on}}

| dam_height_thalweg =

| dam_height_foundation=

| dam_length = {{convert|229.5|m|ft|abbr=on}}

| dam_width_crest =

| dam_width_base =

| dam_volume =

| dam_elevation_crest =

| dam_crosses = Dajia River

| spillway_count = 9

| spillway_type =

| spillway_capacity = {{convert|6380|m3/s|cuft/s|abbr=on}}

| res_name =

| res_capacity_total = {{convert|965000|m3|acre feet|abbr=on}}

| res_capacity_active =

| res_capacity_inactive=

| res_catchment =

| res_surface =

| res_elevation =

| res_max_depth =

| res_max_length =

| res_max_width =

| res_tidal_range =

| plant_operator =

| plant_commission =

| plant_decommission =

| plant_type =

| plant_turbines = 2 X 66.735 MW

| plant_capacity = 133.47 MW

| plant_annual_gen = 410.2 GWh

| website =

| extra =

}}

The Ma'an Dam ({{zh|t=馬鞍壩|s=马鞍坝|first=t|p=Mǎ'ān Bà}}, 'Saddle Dam') is a concrete gravity barrage dam on the Dajia River in Heping District, Taichung, Taiwan. The dam is the final stage of a cascade of hydroelectric power plants along the Dajia River and is located below the Tienlun Dam.

Built from 1992 to 1998, the dam is {{convert|16.3|m|ft|abbr=on}} high and {{convert|229.5|m|ft|abbr=on}} long, storing up to {{convert|965000|m3|acre feet|abbr=on}} in its reservoir. The service spillway of the dam consists of nine gates with a combined capacity of {{convert|6380|m3/s|cuft/s|abbr=on}}.{{cite book|title=Reservoirs and Weirs in Taiwan|publisher=Taiwan Water Resources Agency, Ministry of Public Affairs|language=Chinese|page=328}}

The dam supplies water through a tunnel to a 133.47 MW power station near Xinshe with two 66.735 MW turbines, generating 410.2 million kilowatt hours per year.{{cite web|url=http://energymonthly.tier.org.tw/200901/22.pdf|archiveurl=https://web.archive.org/web/20110815171315/http://energymonthly.tier.org.tw/200901/22.pdf|archivedate=2011-08-15|script-title=zh:大甲溪|publisher=Taiwan Water Resources Agency|date=2009-01-22|accessdate=2013-06-25|language=Chinese}}