373 



A remedy is obtnined by removal of the works above the city, and 

 the substitution of iron pipes for wood; but it is succirested whether 

 another improvement might not be effected by extending the supply 

 pipe from its present mouth, at five feet below the surface, into the deep 

 recess of the channel. 



Plymouth, which borders on the flat clay district, is the only township 

 that abounds in numerous and copious springs of the purest water. 

 Through this tract of broken, gravelly hills, single springs occur suffi- 

 cient to give rise to considerable streams. 



MONROE COUNTY. 



TOPOGRAPHY. 



The county of Monroe partakes of the general uniformity of surface 

 of the eastern border distr'ct of the Peninsula. This general level is 

 hero interrupted by no sudden prominences exceeding 20 feet in height. 

 The rise from the lake is gradual and nearly uniform, attaining at the 

 western line of the county to about 1 1 5 feet. The streams descend with 

 a rapid flow, furnishing numerous mill sites. 



LAKE COAST, 



The very gradual ascent of the coast renders a border of many acres' 

 liable to be overflowed, and has occasioned broad marshes along nearly 

 its whole extent. 



From tlie same cau?e, the streams, after flowing with a lively current, 

 on approaching the coast, subside to a level, and are affected by the fluc- 

 tuations of the lake to the distance of two and three miles inland. 



This joint action of the tide and current has given origin to several 

 extensive deltas. Thus the approach to the city of Monroe, three miles 

 inland, is through a circuitous channel, anion;; islands of low alluvion, 

 making a passage of six miles. A cut effected by the ship canal, now 

 in progreas will shorten this distance one half. The unfavorable im- 

 pression produced by the Raisin and other streams, at their entrance to 

 the Lake, is, however, removed on tracing their course through the rich 

 and varied iiiti lior. 



At least one half the whole line of coast presents a border of marsh, 

 irreclaimable, except at the will of the Lake. 



The most ele\ ated portion of the coast is at Point aux Peaux and 



