This site intends to present technical proposals on hydraulic steel structures such as hydraulic gates,
　intake and discharge equipments, silt/sand dischargers etc. which are provided harbour entrances, docks
　and locks along waterways, or dams, weirs, floodgates and power stations on rivers, or irrigation systems.

PROPOSAL７　【EMERGENCY DISCHARGE GATE】

　A technical proposal on emergency discharge gates for reservoirs is under consideration. Disclosure of the proposal has to be reserved until completion of the necessary prototype verification. Details are as follows.

１．Estimation of Proposed Technology

　The result of estimation on the top page is as follows.
（１）This technology is deemed to be satisfactory for a technical proposal. Its reasons are,
　1) The initial cost is equal to or less than 1/3〜1/2 of the ordinary technology.
　2) The maintenance cost is equal to or less than 1/3〜1/2 of the ordinary
　　 technology.
　3) Reliability is equal to or more than ten times of the ordinary technology.
（２）Still there are risks which prevent the proposal from being realized. Details are as below.
　1) Necessary prototype verification has not been completed. (Pro. Ver.)
　2) The patentee's agreement has not been obtained. (Patentee)
　3) Interests of the beneficiaries coincide with the proposer's. (Bus. His.)
（３）The engineering level is �U (Preliminary design).