25 YEARS AGO -- 1983

A $100,000 project is under way to install slippery plastic mats on the Olympic Intervale Ski Jump in Lake Placid. The project will allow the facility to be used for summer ski jumping.

Clinton County sale-tax receipts are outpacing last year's revenues and the projections of most county officials. With the first-quarter receipts tallied, county sales-tax revenue is running 8 percent above that taken in in the first three months of 1982.

The Town of Harrietstown now has the financial backing to construct a flight-service center at Adirondack Airport -- if it wins designation from the Federal Aviation Administration.

The Plattsburgh Town Board passes a resolution stating its intention to expand the Morrisonville Water District to include 15 homes now using untreated water destined for the city's water-treatment plant.

50 YEARS AGO -- 1958

Architects start going over plans for a proposed new Clinton County Jail in an attempt to lower construction costs. Estimates on the jail's construction were set at $250,000, however, bids on the project totaled over $608,000.

Ten prisoners are moved to the Franklin County Jail after an order from the State Corrections Department to the effect that the Clinton County Jail is overcrowded. The jail had 36 prisoners and its capacity is 23.

Contracts are signed for the construction of 50 low-rent, federally-financed housing units for Plattsburgh. The total cost of the project is set at $750,000.

The State Conservation Department has a new water-spouting aircraft to wage war on forest fires. The yellow, single-engine craft can dump 200 gallons of water on a forest fire and then swoop onto the nearest lake and refill its tanks in 18 seconds for another trip.

75 YEARS AGO -- 1933

An auction sale of all the properties of the Witherbee Sherman and Co. in Essex and Clinton counties will be held. The properties in the foreclosure sale are valued at nearly $4 million.

Criticizing Essex County officials and members of the Board of Supervisors for "gross mismanagement in county finances," Gov. Herbert Lehman signs a bill authorizing the county to issue bonds totaling $300,000 to pay certain outstanding obligations. He said there was no other solution to the county's fiscal difficulties.

Construction estimated to cost more than $500,000 will begin soon at Clinton Prison in Dannemora. Included is the building of a mess hall, dining room and school combined and an extension of the wall.

Gov. Herbert Lehman signs the Feinberg Bill that authorizes negotiations between New York and Vermont for construction of a new bridge near Rouses Point across Lake Champlain. The Vermont Legislature adjourned last month without passing a companion bill.