Ogunquit River Watershed
The Ogunquit River begins in an area of forested and emergent wetlands between Emorys Bridge Road and Ogunquit Road, among a group of six houses. It runs south through forest and crosses Bennett Lot Road. Turning east the river passes a few homes as it crosses Old County Road and crosses into York.
Salmon Falls Watershed
Driscoll Brook flows into South Berwick from Berwick, crossing first under the Boston and Maine Railroad tracks and then under an old, unused bridge. From there the brook flows past dense development in the heart of downtown South Berwick passing under Route 236 and Main Street before joining the Salmon Falls River.
Lord Brook drains a small forested wetland near the intersection of Dow Highway and Lords Lane. It flows southwest for a half mile, past dozens of homes before crossing Dow Highway and entering Eliot.
Shoreys Brook flows into South Berwick from Eliot at Oldfields Road. At this point the brook is already under the influence of incoming tides and the water is brackish. It pools behind a small culvert on Dover Eliot Road then again behind a barrier near a farm before finally flowing into the Salmon Falls River.
Quamphegan Brook begins in a wetland area behind the Marshwood High School. It runs south bordered by the schools athletic fields to the east and a large farm to the west before widening in an area of beaver activity. The brook then passes into a residential area and crosses under Quamphegan Road where it begins to change to brackish water. It turns east, passing through a culvert under a private driveway and pooling behind a culvert on Oldfields Road where it is joined by a small stream from the north. Quamphegan Brook then flows for three quarters of a mile past several more homes and empties into the Salmon Falls River.
The Salmon Falls River forms South Berwick’s western border with New Hampshire. It flows five miles from the railroad bridge to the confluence with the Cocheco River and the beginning of the Piscataqua River. On its way it crosses four bridges, the waste treatment plant, and a hydro electric dam. The majority of development is in the center of town, and transitions to farms and finally forest as the river flows south past Vaughan Woods State Park. There is a boat access point on the south side of the Eliot Bridge.
Great Works River Watershed
Dennett Brook originates near the power line right of way on the South Berwick border with North Berwick. It flows south through a small emergent wetland in an undeveloped area of forest, crosses Dennett Road, and joins Boyd Brook north of Thurrell Road. This brook begins just north of Brown Hill. It flows southwest, parallel to Thurrell Road for three quarters of a mile, passing a few homes and a small farm. Boyd Brook then crosses the road and enters a mile long stretch of undeveloped forest. The brook emerges near a farm on Rodier Road, where it passes through a large culvert and flows into the Great Works River.
Hussey Brook crosses into Berwick from North Berwick near a large farm on Dennett Road. It winds its way through a forest, running for just under a mile before joining the Great Works River.
Chicks Brook originates in a marsh area north of Mt. Agamenticus. It flows through a wide area of forest between Bennett Lot Road and Mountain Road, encountering no development until it passes a few homes on Emorys Bridge Road and runs into the Great Works River.
Hoopers Swamp is an emergent wetland that sits on the South Berwick border with York between Mountain Road and Belle Marsh Road. The surrounding area is mostly undeveloped, with a few homes near the northern end. Hoopers Brook runs out of the swamp, crossing Belle Marsh Road and flowing north through a mile of forest. It runs into a small marsh in the back yards of several homes on Emorys Bridge Road. The brook crosses the road through a small culvert and flows into the Great Works River.
Cox Pond is located next to Witchtrot Road. The 19 acre pond is mostly surrounded by forest and emergent wetland with a few homes near its northern end. A small stream flows out of the pond and runs northeast along Witchtrot Road. It crosses Bennett Road and then joins Bennett Brook just west of Earls Road. Warren Pond is 25 acres in size and sits in a hilly area between Belle Marsh Road and Earls Road. Other than a few homes there is no development around the pond. It drains out of its western edge forming a small stream that flows past a few homes on Earls Road and eventually joins Bennett Brook. This brook originates behind a home on Bennett Road. It flows north past a few dozen homes then passes under Emorys Bridge Road and joins the Great Works River.
Knights Pond is near a few farms on Knights Pond Road close to the South Berwick border with Berwick. It is 46 acres in area and is divided into to parts by an old causeway at the southern end. Along with the farms, a few small homes are scattered around its shoreline. A small stream drains out of the northern end of the pond and flows north, entering Berwick briefly as it skirts the edge of a large farm and then joins Lovers Brook. Adams Brook and Lovers Brook both flow into South Berwick from Berwick near several farms on Pond Road. They each flow for about a tenth of a mile before converging and crossing under Pond Road. Lovers Brook then continues southeast for three quarters of a mile through an area of forested wetland and crosses Knights Pond Road through a large culvert. The brook then flows under an old bridge and joins the Great Works River.
The Great Works River flows into South Berwick from North Berwick near a large farm on Dennett Road. The river flows south, twisting and turning often as it makes its way through a forested area and then passes under a bridge on Great Hill Road. It continues to meander past a few farms on Rodier Road, still heading south. The river then passes under a bridge on Hooper Sands Road and turns east, still winding dramatically as it begins to encounter increasing development. A little further downstream it flows close by a large junk car lot on Emorys Bridge Road. The Great Works River follows this road for another two miles before crossing under it at a bridge near the power line right of way. The river begins to widen as it gathers water from its many tributaries and flows through a mile long stretch of forest and past a large subdivision south of Agamenticus Road. Turning west the river passes dense development along Dow Highway and flows over a hydro electric dam on Brattle Street. Just downstream of the dam the Great Works River forms Leighs Mill Pond, which forms behind a causeway on Vine Street. The river makes its may through a narrow passage under the road and then empties into the Salmon Falls River.